[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.1"]
[White "Cantero, Rodolfo"]
[Black "Zapata Charles, Santiago"]
[Result "1/2-1/2"]
[ECO "C18"]
[WhiteElo "2059"]
[BlackElo "2322"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,76,6,16,8,17,10,18,5,33,37,31,11,60,68,56,11,12,11,11,11,11,11,10,7,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,-17,-17,-17,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Qa5 7. Bd2 Qa4 8. Qg4 Kf8 9. Nf3 {C18: French: 3 Nc3 Bb4: Main line: 7 h4 and 7 Qg4} (9. h4 Nc6 10. h5 h6 11. Qd1 cxd4 12. Nf3 dxc3 13. Bxc3 g5 14. hxg6 Qe4+ 15. Be2 Qxg6 16. Qd2 Nge7 17. Bd3 Qxg2 18. Ke2 Qg4 19. Rh4 Qg7 20. Rg1 Ng6 21. Rf4 Nce7 22. Bb4 a5 23. Rxg6 {1-0 (23) Caruana,F (2804)-Lenderman,A (2599) Saint Louis 2018}) 9... Nc6 10. h3 $146 ({Predecessor:} 10. Qf4 Qxc2 11. dxc5 Nge7 12. Be2 Ng6 13. Qe3 Qe4 14. Qxe4 dxe4 15. Ng5 Ncxe5 16. Nxe4 Bd7 {1-0 (44) Saric,I (2628)-Rapport,R (2680) Kozloduy 2013}) 10... Qxc2 11. dxc5 b6 12. cxb6 axb6 13. Be2 Ba6 14. Bxa6 Rxa6 15. O-O (15. Nd4 $5 {[%cal Rd4c2]} Qa4 16. O-O $14) 15... Nge7 {The position is equal.} 16. Rfc1 Qe4 17. c4 {With the idea cxd5.} Qxg4 18. hxg4 dxc4 19. Rxc4 h5 20. g5 g6 21. Rac1 b5 22. Rc5 Kg7 23. Rxb5 Rxa3 24. Bb4 Nxb4 25. Rxb4 Rha8 26. Rb7 R8a7 (26... Nd5 {is interesting.} 27. Nd4 Kg8 28. Nb5 Rb3 29. Nd6 Rxb7 30. Nxb7 Nf4) 27. Rcc7 Rxb7 28. Rxb7 $11 {[%mdl 4096] Endgame KRN-KRN} Nc6 29. Rc7 Rc3 30. Kh2 {[#] And now Nd4! would win.} Rc4 31. Rb7 Kf8 32. g3 Re4 33. Rb5 $1 Ke8 34. Kg2 Kd8 35. Kh3 Kc7 36. Kg2 Rb4 37. Rxb4 Nxb4 38. Nd2 Nd3 {Accuracy: White = 74%, Black = 56%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.2"]
[White "Coro, Lucas"]
[Black "Gomez Barrera, Gonzalo Andres"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2315"]
[BlackElo "2058"]
[Annotator "TA"]
[PlyCount "37"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,37,39,27,52,50,222,247,268,262,400,392,393,402,385,351,397,408,408,362,342,277,427,358,817,841,918,927]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Nd7 6. O-O h6 7. Nbd2 c5 {B12: Caro-Kann: Advance Variation} (7... g5 8. Nb3 Ne7 9. a4 Bg7 10. a5 O-O 11. c3 b6 12. Be3 Qc7 13. Ne1 f6 14. exf6 Nxf6 15. f4 {0-1 (40) Sethuraman,S (2637)-Iturrizaga Bonelli,E (2639) Dubai 2019}) 8. c4 cxd4 $2 ({Better is} 8... Ne7 $14) 9. Nxd4 $18 Nxe5 $146 {[#]White is clearly better.} ({Predecessor:} 9... Ne7 10. Nxf5 Nxf5 11. cxd5 exd5 12. Nf3 d4 13. Nxd4 Nxd4 14. Qxd4 Qb6 15. Qxb6 Nxb6 {1-0 (28) Leck,G (1910)-Janssen,N (1855) Goch 2016}) 10. cxd5 $1 Qxd5 (10... Bc5 {was necessary.} 11. N2b3 Bxd4) 11. Qa4+ Nd7 12. Bf3 Qc5 13. Bxb7 Rb8 14. Bc6 Ngf6 {With the idea ...Rb4.} 15. N2b3 Qb4 16. Qxa7 Be7 (16... Be4 $142 17. Be3 Qb6 18. Qxb6 Rxb6) 17. Bf4 Rd8 $2 {[#]} (17... O-O 18. Nxf5 exf5 19. Bxb8 Nxb8) 18. a3 Qc4 19. Rac1 {Accuracy: White = 100%, Black = 18%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.3"]
[White "Benitez Galeano, Alejandro"]
[Black "Munoz, Francisco Javier"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "2052"]
[BlackElo "2308"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,64,0,4,0,0,-14,7,14,8,4,4,9,16,-9,-12,-18,52,31,48,54,45,22,19,23,20,0,0,0,-5,-22,-8,-4,-12,-9,0,0,0,-222,-228,-275,-275,-264,-255,-276,-279,-280,-263,-220,-220,-377,-573,-1950,-1943]} 1. Nf3 Nf6 2. c4 e6 3. b3 d5 4. Bb2 Be7 5. e3 O-O 6. Nc3 c5 7. cxd5 Nxd5 8. Qc2 {A13: English Opening: 1...e6} (8. Be2 b6 9. Nxd5 exd5 10. d4 a5 11. dxc5 bxc5 12. O-O Be6 13. Bb5 Qb6 14. Qe2 Nc6 15. Rac1 Rac8 {0-1 (47) Nakamura,H (2746)-Caruana,F (2832) London 2018}) 8... b6 9. a3 Nc6 {[%cal Bb8c6,Bc6a5,Ba5b7,Bb7d6,Bd6e4][%mdl 32]} 10. h4 {The position is equal.} f5 11. Nxd5 exd5 12. d4 Be6 13. Bb5 $146 ({Predecessor:} 13. Ng5 Bxg5 14. hxg5 c4 15. g6 hxg6 16. bxc4 {1-0 (86) Cheparinov,I (2689)-Fridman,D (2594) Caleta 2017}) 13... Na5 14. Bc3 Qc7 ({Black should try} 14... Nb7 $11) 15. O-O Nb7 16. dxc5 bxc5 17. Be2 Nd6 18. Qb2 Bf6 19. Rac1 Bxc3 20. Rxc3 Ne4 21. Rcc1 f4 22. Bd3 fxe3 23. fxe3 Qb6 $36 {[%mdl 2048] Black has good play.} 24. Bxe4 dxe4 25. Nd2 $2 (25. Ng5 $11 {and White stays safe.}) 25... c4 $1 $19 {[%cal Bc5c4,Bc4b3][%mdl 96] [#] Discovered Attack} 26. Rfe1 cxb3 27. Nxe4 Rac8 28. Ng5 {intending Qe5.} Rxc1 29. Qxc1 h6 30. Nxe6 Qxe6 31. Re2 $2 {[#]} (31. Qc3 {was worth a try.}) 31... Rc8 (31... a5 $142 32. Qc3 a4) 32. Qe1 Qe4 {Accuracy: White = 56%, Black = 72%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.4"]
[White "Donoso Diaz, Sebastian"]
[Black "Cosme Contreras, Trilce"]
[Result "1/2-1/2"]
[ECO "E71"]
[WhiteElo "2251"]
[BlackElo "2051"]
[Annotator "TA"]
[PlyCount "163"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,162,38,29,24,31,29,-43,-42,-32,-30,-43,0,-20,0,0,18,0,76,-57,53,51,68,76,95,60,95,39,90,90,88,79,108,131,101,99,136,0,0,0,0,-13,-8,-4,0,0,0,-7,0,-12,20,0,23,0,90,103,168,150,236,231,661,641,614,606,760,693,693,686,679,678,548,81,81,88,106,106,6589,5812,29969,29951,12487,1481,648,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. Be3 Nfd7 {E71: King's Indian: 4 e4 d6 5 h3} (6... e5 7. d5 a5 8. g4 Na6 9. Nge2 Nd7 10. Qd2 Ndc5 11. Ng3 c6 12. Be2 cxd5 13. cxd5 a4 14. h4 Bd7 15. h5 Rc8 {0-1 (39) Caruana,F (2832)-Nakamura,H (2746) London 2018}) 7. g4 a6 $146 ({Predecessor:} 7... e5 8. d5 Qe7 9. h4 h6 10. Qd2 Kh7 11. h5 g5 12. b4 b6 13. a4 Na6 14. Rb1 Bb7 15. b5 Nac5 16. f3 f6 17. Nh3 Qd8 {½-½ (17) Corbett,C (1508)-Heubach,M (1252) Hagen 2002}) 8. h4 (8. Nf3 $11) 8... c5 $1 $15 {Black is slightly better.} 9. d5 b5 10. Be2 bxc4 11. f4 Qb6 12. Rb1 Bd4 13. Bd2 e6 (13... a5 $11) 14. g5 (14. h5 $1 $16) 14... Re8 ({Black should try} 14... e5 $1 $15) 15. dxe6 $1 $14 fxe6 16. h5 Nf8 17. Bxc4 Ra7 18. Nge2 (18. Nf3 $16) 18... Nc6 (18... Rf7 $14) 19. Nxd4 $16 Nxd4 20. Be3 Rf7 21. O-O Bb7 22. b4 Qa7 23. b5 (23. Rf2 $16) 23... axb5 $11 24. Nxb5 Nxb5 25. Bxb5 Rd8 26. Qc2 $132 {[%mdl 2048] White is not keeping still} Qa8 27. Bd3 Ba6 28. Bxa6 Qxa6 29. h6 Ra7 30. Rb2 Qa4 31. Rd1 Qxc2 (31... Qc6 $1 $11 {remains equal.}) 32. Rxc2 $16 Rdd7 (32... Rad7 $16 {keeps fighting.}) 33. Rcd2 $1 $18 Ra6 {[#]} (33... Rf7 $16 {is a better defense.}) 34. Bxc5 $1 {[%mdl 512]} dxc5 $2 (34... d5 35. exd5 exd5 36. Bxf8 (36. Rxd5 Rxd5 37. Rxd5 Ne6 $18) 36... Kxf8 37. Rxd5 Rxd5 38. Rxd5 Ke8) 35. Rxd7 Nxd7 36. Rxd7 Rxa2 {[%mdl 4096] Endgame KR-KR} 37. Rg7+ Kh8 38. Re7 {[%cal Re7e8]} Ra8 39. Rc7 Kg8 40. Rxc5 $2 (40. Kg2 $18 {has better winning chances.} Rf8 41. Kg3 (41. Rxc5 Rxf4 42. Re5 Kf7 $16)) 40... Rf8 $16 41. Kf2 Rxf4+ 42. Ke3 Rf8 $2 {[%mdl 8192] [#]} (42... e5 $16 43. Rxe5 Rf7 44. Re8+ Rf8) 43. Kd4 $1 $18 Re8 44. Ke5 Kf7 45. Rc7+ Re7 {[#]} 46. Kd6 $2 (46. Rc8 $1 $18 {[%cal Rc8h8] aiming for Rh8.} Ra7 47. Rh8 Ra5+ 48. Kd6 Ra6+ 49. Kd7 Ra7+ 50. Kc6) 46... Rxc7 $11 {The position is equal.} 47. Kxc7 {e5 would kill now. K3P-K3P} e5 $1 48. Kd7 Kf8 49. Ke6 Ke8 50. Kf6 Kf8 51. Ke6 Ke8 52. Kd6 Kd8 53. Kc5 Kc7 54. Kb5 Kb7 55. Kc5 Kc7 56. Kd5 Kd7 57. Kxe5 {Threatens to win with Kf6. K3P-KPP} Ke7 $1 58. Kd5 Kd7 59. Kc5 {White threatens Kd5 and mate.} Kc7 60. Kb5 {And now Kc5 would win.} Kd6 61. Kc4 Ke5 62. Kd3 Ke6 63. Ke2 Kd6 64. Kf3 Kc5 65. Kg4 Kd6 66. Kf3 Ke6 (66... Ke5 $5) 67. Ke2 Kd6 68. Kd3 Ke5 69. Ke3 Ke6 70. Kd4 Kd6 71. e5+ Ke6 72. Ke4 Ke7 73. Kd5 Kd7 74. Kc5 Ke6 75. Kd4 Ke7 76. Kd5 Kd7 77. e6+ $1 Ke8 78. Kd4 Ke7 79. Ke5 Ke8 80. Kd6 {Threatening mate with e7.} Kd8 81. e7+ Ke8 82. Ke6 {Accuracy: White = 62%, Black = 54%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.5"]
[White "Mayeregger, Arnold"]
[Black "Gimenez Aguirre, Alejo Ismael"]
[Result "1/2-1/2"]
[ECO "A46"]
[WhiteElo "1913"]
[BlackElo "2247"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,62,14,15,22,37,25,35,26,16,18,22,-15,-8,-15,17,1,14,-24,-24,-22,-25,-13,-19,-18,-14,-24,0,-21,56,56,52,38,40,47,88,47,55,35,36,-30,0,0,0,0,106,99,98,109,106,106,103,103,119,70,73]} 1. d4 Nf6 2. Nf3 e6 3. Bf4 b5 (3... c5 4. e3 cxd4 5. exd4 b6 6. Bd3 Bb7 7. h3 Be7 8. O-O d6 9. a4 a6 10. Bh2 O-O 11. Nbd2 Nbd7 12. Re1 Re8 13. Qe2 {0-1 (45) Maghsoodloo,P (2688)-Sjugirov,S (2663) St Petersburg 2018}) 4. e3 b4 5. Nbd2 $146 ({Predecessor:} 5. a3 Bb7 6. axb4 Bxb4+ 7. Nbd2 O-O 8. Bd3 d5 9. c3 Bd6 10. Qb3 Qc8 11. Bxd6 cxd6 {½-½ (34) Ravi,T (2302)-Stopa,J (2510) Hyderabad 2013}) 5... Be7 6. Bd3 {A46: 1 d4 Nf6 2 Nf3 e6: Torre, London and Colle Systems} c5 7. dxc5 Bxc5 8. Qe2 Nc6 9. Rd1 Bb7 10. Nb3 Be7 11. e4 Nh5 12. Be3 Qc7 13. g3 Nf6 14. Nc5 Bxc5 15. Bxc5 d6 16. Be3 O-O 17. O-O Rac8 18. Bf4 Ne5 (18... Rfe8 $11) 19. Nxe5 $14 dxe5 20. Bd2 a5 21. c3 Qb6 22. cxb4 (22. Be3 {feels hotter.} Qc7 23. cxb4 axb4 24. f3 Qa5 25. Bd2) 22... axb4 23. Qe1 Rfd8 24. Bxb4 ({White should play} 24. Be3 $14 Qa5 25. f3) 24... Rxd3 (24... Nxe4 $5 25. Bxe4 (25. Ba5 $2 Ng5 $19) 25... Rxd1 26. Qxd1 Bxe4 $15) 25. Rxd3 {[#] And now Ba5 would win.} Nxe4 26. Bc3 f5 (26... Qc6 $11 {remains equal.} 27. f3 Ba6 28. Qxe4 Qxe4 29. fxe4 Bxd3) 27. Qe3 $16 Qxe3 28. Rxe3 ({Reject} 28. fxe3 $6 Ba6 $11) 28... f4 29. Rxe4 Bxe4 30. Re1 Bd5 31. Rxe5 fxg3 {Accuracy: White = 60%, Black = 45%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.6"]
[White "Aguilar, Luis Miguel"]
[Black "Araoz Andrade, Ivan Alexander"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "2193"]
[BlackElo "1843"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,63,6,21,-33,0,0,38,21,39,12,48,53,125,49,79,81,90,98,93,97,71,60,50,43,87,91,102,110,135,69,130,48,121,-47,0,0,0,-46,100,76,529,570,838,795,805,668,1840,1693,29998,29999]} 1. g3 c5 2. Bg2 g6 3. e4 Bg7 4. Ne2 Nc6 5. c3 e5 6. d3 Nge7 7. Be3 d6 8. O-O O-O 9. Nd2 {B20: Sicilian: Unusual White 2nd moves} (9. f4 $11) 9... f5 (9... b6 10. f4 d5 11. h3 exf4 12. gxf4 Re8 13. e5 Be6 14. d4 Qd7 15. Kh2 Nf5 16. Bf2 cxd4 17. Nxd4 Ncxd4 18. Bxd4 Nxd4 19. cxd4 {½-½ (38) Mamedyarov,S (2733)-Vachier Lagrave,M (2710) Beijing 2011}) 10. f4 h6 11. Nf3 {White is slightly better.} b6 12. Nh4 $146 ({Predecessor:} 12. Qb3+ Kh7 13. Rad1 Ba6 14. Qa4 Qc8 15. Nh4 fxe4 16. fxe5 Rxf1+ 17. Rxf1 {0-1 (27) Anurag,M (2301)-Ruiz Sanchez,O (2416) Barbera del Valles 2012}) 12... Bd7 (12... Qe8 {with more complications.} 13. exf5 Nxf5 14. Qd2 Kh7 15. Nxg6 Kxg6 16. g4 Nxe3 17. Qxe3 Bxg4 18. Be4+ Bf5) 13. exf5 gxf5 {[#]} (13... Nxf5 $14 14. Nxf5 gxf5) 14. fxe5 (14. g4 $1 $16) 14... dxe5 $14 15. d4 {Black must now prevent d5.} cxd4 16. cxd4 e4 17. Nf4 Kh7 18. d5 Ne5 19. Bd4 Rc8 20. Bh3 Rc4 {next ...Rxd4 is good for Black.} 21. Bc3 b5 22. a3 (22. Kh1 $16) 22... a5 (22... Rxc3 $14 23. bxc3 Nc4) 23. Qe2 (23. Kh1 $16) 23... Qc8 ({Better is} 23... Bf6 $14) 24. d6 $2 (24. Rad1 $16) 24... Qc5+ 25. Kh1 Qxd6 26. Bxa5 Nf3 (26... Nd3 $15 {keeps the upper hand.}) 27. Rad1 $36 {[%cal Ba1d1,Bd1d6,Bd6h6][%mdl 2080] Black is under strong pressure.} ({But not} 27. Nxf3 $6 exf3 28. Rxf3 Bc6 $11) 27... Qc6 $2 {[%mdl 8192]} (27... Nd4 $16 {is tougher.}) 28. Nxf3 $18 exf3 29. Qxe7 Bc8 30. Bc3 {[%csl Gc3][%cal Re7g7]} Rg8 31. Rd6 Qc5 {[#]} 32. Rxh6+ $1 {[%mdl 576] Pin. Accuracy: White = 42%, Black = 16%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.7"]
[White "Melian, Juan Sebastian"]
[Black "Zambrano Acebo, Jean Junior"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "1786"]
[BlackElo "2174"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,74,2,4,-27,-14,-56,-65,-70,-66,-77,-45,-50,-53,-101,-70,-92,-83,-75,-83,-74,-66,-58,-72,-64,-57,-92,-92,-242,-241,-242,-244,-275,-217,-252,-251,-250,-262,-306,-60,-87,-78,-86,-50,-57,-50,-57,-50,-52,-50,-62,-8,-72,-47,-498,-500,-486,-482,-29993,-29994,-29994,-590,-663,-655]} 1. Nf3 Nf6 2. d4 e6 3. Bg5 h6 4. Bh4 b6 5. Nbd2 Bb7 6. e3 c5 7. c3 Be7 8. Ne5 {A46: 1 d4 Nf6 2 Nf3 e6: Torre, London and Colle Systems} (8. Bd3 Nc6 9. a3 O-O 10. O-O cxd4 11. cxd4 Rc8 12. Qe2 Nh5 13. Bxe7 Qxe7 14. Rac1 Nf6 15. Rc2 Nb8 16. Rfc1 Rxc2 17. Rxc2 Rc8 18. Rxc8+ Bxc8 19. e4 {1-0 (58) Carlsen,M (2837)-Korobov,A (2652) Riadh 2017}) 8... O-O 9. f4 $146 ({Predecessor:} 9. Bxf6 Bxf6 10. Qh5 cxd4 11. exd4 Bxe5 12. Qxe5 d6 13. Qe3 Nd7 14. Bd3 Nf6 15. O-O Rb8 {0-1 (38) Rozhko,D (2337)-Andreev,E (2473) Sochi 2014}) 9... d6 10. Nef3 {Black is slightly better.} Ng4 11. Bf2 Nd7 12. Bd3 cxd4 13. exd4 e5 14. fxe5 dxe5 {Threatens to win with ...Ndf6.} 15. O-O f5 {White must now prevent ...e4.} 16. dxe5 Ndxe5 17. Nxe5 Nxe5 18. Be2 Qc7 19. Bg3 Rad8 {Hoping for ...Bg5.} 20. Qb3+ (20. Kh1 $17 {is a better defense.}) 20... Bd5 $19 21. Qc2 {[#]} Bc5+ $1 22. Kh1 Qb7 {[%csl Gb7][%cal Rd5g2]} 23. Bf3 Nxf3 24. Nxf3 Be4 25. Qb3+ Qd5 $2 ({Better is} 25... Kh7 $19 {And now ...Rd3 would win.} 26. Qc4 Rfe8) 26. Rad1 Qxb3 $40 {[%mdl 128] White is in trouble.} 27. axb3 g5 28. b4 Be3 {Strongly threatening ...Rxd1.} 29. Bc7 Rxd1 30. Rxd1 g4 31. Ne5 h5 ({Black should try} 31... Re8 $15) 32. Nc4 (32. Ng6 $11 {remains equal.}) 32... f4 33. Rd8 $2 {[%mdl 8192]} (33. Nxe3 $15 fxe3 34. Rd8) 33... Rxd8 34. Bxd8 Bf2 {( -> ...f3)} 35. Bg5 {[#]} (35. Nd2 $19 Bd3 36. Nb3) 35... f3 {[%csl Ge4][%cal Rf3g2]} 36. Ne3 fxg2+ (36... h4 $142 37. Bxh4 Bxe3 38. Bf2 Bxf2 39. g3 Be3 40. h4 f2+ 41. Kh2 f1=N#) 37. Nxg2 h4 {Accuracy: White = 31%, Black = 61%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.8"]
[White "Heinechen, Juan"]
[Black "Orrego Palermo, Marcelo"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2123"]
[BlackElo "1632"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,45,37,38,38,41,37,59,50,65,58,47,57,63,62,64,46,67,35,72,63,82,80,108,99,560,562,546,423,392,394,440,440,828,822,833,826]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 a6 6. h3 Bf5 7. Bd3 {B01: Scandinavian Defence} (7. Bc4 e6 8. O-O Nc6 9. Re1 Be7 10. Bg5 Rd8 11. Qe2 Nxd4 12. Nxd4 Qxd4 13. Rad1 Qc5 14. Rxd8+ Bxd8 15. Bxf6 Bxf6 {0-1 (61) Deszczynski,A (2348)-Gashimov,V (2608) Warsaw 2005}) 7... Bxd3 8. Qxd3 Nc6 9. O-O {White is slightly better.} h6 10. Ne4 Nxe4 11. Qxe4 {Black must now prevent d5.} e6 $146 ({Predecessor:} 11... O-O-O 12. c3 e6 13. Re1 Qd5 14. Qxd5 Rxd5 15. Bf4 Be7 16. Re2 Rhd8 17. Rae1 Bf6 18. g3 g5 19. Be5 Bxe5 20. Nxe5 Nxe5 21. Rxe5 {½-½ (21) Rako,I (2142)-Olle,P (2185) Hungary 2007}) 12. Bf4 Qd7 13. c4 {And now d5 would win.} O-O-O {[%cal Rc6d4]} 14. Rfd1 {[#] Threatens to win with d5.} (14. Rad1 $5 {[%cal Rd4d5]} Bd6 15. Bxd6 Qxd6 16. Rfe1 $14) 14... g5 15. d5 $36 {[%mdl 2048] White is pushing.} f5 16. Qe2 exd5 17. cxd5 ({Much worse is} 17. Rxd5 $6 Qe7 $11) 17... Ne7 $2 {[%mdl 8192] [#]} (17... Nb4 $16 {is more resistant.} 18. Be5 Rh7) 18. Bxc7 $1 $18 {[%mdl 576] Decoy} Kxc7 19. Qe5+ Qd6 {...Qxe5 is the strong threat.} 20. Qxh8 Nxd5 21. Qh7+ {White is clearly winning.} Rd7 (21... Qd7 $142 22. Rac1+ Kb8 23. Qxd7 Rxd7) 22. Qxf5 Bg7 23. Rac1+ {Played: Rd1-d2} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.9"]
[White "Allo Collante, Enrique"]
[Black "Estrada Lavin, Cristian Alexand"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1595"]
[BlackElo "2116"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,60,-2,0,0,0,-10,44,-27,-27,-30,-41,-44,-30,-45,-44,-61,-67,-72,-69,-66,-15,-82,0,-170,-164,-157,-159,-153,-106,-108,-40,-165,-172,-204,-135,-196,-187,-224,-235,-211,-225,-212,-71,-92,-75,-79,-61,-106,-64,-1318,-1342,-1647,-1641]} 1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. Nf3 Nc6 5. Nbd2 (5. c3 e6 6. Nbd2 cxd4 7. exd4 Nh5 8. Bg5 f6 9. Be3 Bd6 10. g3 O-O 11. Nh4 g6 12. Be2 Ng7 13. O-O e5 14. dxe5 fxe5 {½-½ (59) Aronian,L (2767)-Nakamura,H (2777) chess.com INT 2018}) 5... Qb6 {[%cal Rc5d4]} 6. dxc5 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} Qxb2 7. Rb1 Qxa2 (7... Qc3 $11) 8. Nb3 $146 (8. Bb5 $14) ({Predecessor:} 8. Bb5 Qa5 9. O-O Bd7 10. c4 Qd8 11. Ne5 e6 12. Bxc6 bxc6 {1-0 (38) Laveryd,P (2368)-Sjodahl,P (2410) Sweden 2018}) 8... Qa3 $11 9. c3 Ne4 10. Qc2 Nxc5 11. Nxc5 Qxc5 12. Rb5 Qa3 13. Rb3 Qa5 14. Bb5 Bd7 ({Black should play} 14... f6 $15 15. O-O a6 16. Bxc6+ bxc6) 15. Bd3 {[#]} (15. Be2 $11 {keeps the balance.}) 15... g6 (15... f6 $1 $17 {White must now prevent ...e5.} 16. Rxb7 e5) 16. Ne5 $2 (16. Rxb7 $11 {and White is okay.} Rc8 17. Rb5) 16... Nxe5 $19 17. Bxe5 f6 18. Bg3 Rc8 {[%cal Ba8c8,Bc8c5,Bc5c4,Bc4g4][%mdl 32]} 19. O-O b5 ({Black should try} 19... Bc6 $17 20. Qb2 Qc5) 20. Rfb1 {[#]} (20. Qb2 $1 $15) 20... a6 $1 21. Qb2 Rc5 22. Ra1 (22. e4 $17) 22... Qb6 23. Rba3 Bc8 24. e4 dxe4 25. Bxe4 Bg7 (25... e5 $19 {has better winning chances. Threatens to win with ...Be7.} 26. R3a2 Bh6) 26. Bf4 $17 Rc4 27. Be3 Qd6 28. Bc2 Qc6 {Hoping for ...Rg4!} 29. Bd2 $2 {[%mdl 8192] [#]} (29. Bd1 $15) 29... Rg4 $1 $19 {[%csl Gg4][%cal Rc6g2]} 30. g3 Bb7 {Accuracy: White = 25%, Black = 40%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.10"]
[White "Vazquez, Facundo"]
[Black "Avalos Sanabria, Augusto Alfredo"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "2086"]
[BlackElo "1474"]
[Annotator "NA RC"]
[PlyCount "43"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. f3 e6 6. e4 Be7 7. e5 Nfd7 8. f4 O-O 9. Nf3 f6 10. Bd3 fxe5 11. fxe5 Nc6 12. O-O Qb6 13. Na4 Qd8 14. a3 b6 15. Qc2 Bb7 16. Bxh7+ Kh8 17. Bg6 Rc8 18. Qe2 a6 19. Be3 Na5 20. Nh4 Bg5 21. Qh5+ Bh6 22. Bxh6 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.11"]
[Round "1.11"]
[White "Ayala Ruiz, Miguel Angel"]
[Black "Suarez, Pedro"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "1444"]
[BlackElo "2077"]
[Annotator "NA RC"]
[PlyCount "56"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. dxe5 dxe5 6. a3 Be7 7. Bc4 O-O 8. O-O c6 9. Qe2 b5 10. Ba2 a5 11. Nb1 Qc7 12. Nbd2 Nc5 13. Ne1 Rd8 14. c3 Be6 15. Bxe6 Nxe6 16. Ndf3 Nc5 17. Nd2 Bf8 18. Nc2 Rd7 19. b4 Na4 20. c4 Nc3 21. Qe3 axb4 22. axb4 Rxa1 23. Nxa1 Bxb4 24. Nc2 c5 25. f3 h6 26. cxb5 Nxb5 27. Nc4 Bc3 28. N2a3 Bd4 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.1"]
[White "Estrada Lavin, Cristian Alexand"]
[Black "Coro, Lucas"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "2116"]
[BlackElo "2315"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,81,10,9,12,23,0,0,0,0,0,21,15,26,11,12,0,0,0,0,0,0,0,17,0,0,-11,15,24,28,7,35,27,59,71,85,52,60,22,30,20,21,14,41,0,0,0,0,0,43,37,763,742,729,579,29991,29987,29987,29988,29990,29991,29991,29992,29992,29992]} 1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. b3 Bf5 5. Bb2 e6 6. d3 h6 7. Nbd2 Be7 8. O-O O-O 9. Re1 Bh7 10. e4 a5 11. a4 {A07: Réti Opening: New York and Capablanca Systems} (11. a3 Na6 12. Qe2 b5 13. Rad1 Qb6 14. Bh3 dxe4 15. Nxe4 Nxe4 16. dxe4 Rad8 17. Ne5 Bf6 18. Bg2 Nb8 19. c4 {1-0 (52) Fedoseev,V (2724)-Shankland,S (2725) Wijk aan Zee 2019}) 11... Na6 12. e5 Nd7 13. Nd4 {[#] The position is equal.} Re8 $146 ({Predecessor:} 13... c5 14. Nb5 Nb4 15. f4 Rc8 16. Re2 Nb6 17. Nf1 Qd7 18. Ne3 Rfd8 {0-1 (45) Larino Nieto,D (2434)-Jovanic,O (2515) Dublin 2019}) 14. Kh1 Bf8 15. f4 Qb6 16. Qe2 Nc7 17. Rf1 c5 18. N4f3 Na6 19. Rac1 Nb4 20. g4 Rac8 21. Ne1 Qc7 22. c3 Na6 23. Nc2 Qb6 24. Na3 Rcd8 25. Nb5 Nc7 26. c4 $1 Nb8 27. f5 Nc6 28. Rce1 Nb4 29. Rf3 Nxb5 30. cxb5 Nc2 31. Ref1 (31. Nc4 $5 dxc4 32. Qxc2 $11) 31... Nd4 $1 {[%cal Rd4e2]} 32. Bxd4 cxd4 33. f6 Rd7 34. g5 hxg5 $2 {[%mdl 8192]} (34... g6 $14) 35. Rh3 $18 {Intending Qh5! and mate.} Bg6 {[#]} 36. Qg4 $1 Bb4 37. Qxg5 {Played: Nd2-f3} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.2"]
[White "Munoz, Francisco Javier"]
[Black "Heinechen, Juan"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2308"]
[BlackElo "2123"]
[Annotator "NA"]
[PlyCount "59"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 {[%emt 0:00:30]} e5 {[%emt 0:00:30]} 2. Nf3 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 3. Nxe5 {[%emt 0:01:00]} d6 {[%emt 0:00:00]} 4. Nf3 {[%emt 0:00:30]} Nxe4 {[%emt 0:00:30]} 5. Nc3 {[%emt 0:00:30]} Nxc3 {[%emt 0:00:00]} 6. dxc3 {[%emt 0:00:00]} Be7 {[%emt 0:01:00]} 7. Be3 {[%emt 0:03:00]} Nc6 $11 {[%emt 0:11:30]} 8. Qd2 {[%emt 0:00:30]} Be6 {[%emt 0:00:00]} 9. O-O-O {[%emt 0:12:30]} Qd7 {[%emt 0:00:00]} 10. Kb1 {[%emt 0:01:30]} Bf6 {[%emt 0:11:30]} 11. h3 {[%emt 0:36:30]} a6 {[%emt 0:31:30]} 12. Ng5 {[%emt 0:00:30]} Bxg5 {[%emt 0:00:30]} 13. Bxg5 {[%emt 0:00:30]} f6 {[%emt 0:00:30]} 14. Be3 {[%emt 0:00:30]} O-O-O {[%emt 0:00:30]} 15. Be2 {[%emt 0:00:30]} Rhe8 {[%emt 0:00:30]} 16. b3 {[%emt 0:00:30]} Bf5 {[%emt 0:00:30]} 17. c4 {[%emt 0:00:30]} a5 {[%emt 0:00:30]} 18. a3 {[%emt 0:00:30]} Qf7 {[%emt 0:04:30]} 19. Qc3 {[%emt 0:07:30]} Qg6 {[%emt 0:05:30]} 20. g4 {[%emt 0:01:30]} Be4 {[%emt 0:01:30]} 21. Rhg1 {[%emt 0:01:30]} h6 {[%emt 0:07:30]} 22. Kb2 {[%emt 0:01:30]} Qf7 {[%emt 0:03:08]} 23. b4 {[%emt 0:07:30]} axb4 {[%emt 0:05:07]} 24. axb4 {[%emt 0:00:30]} d5 {[%emt 0:00:34]} 25. cxd5 {[%emt 0:01:30]} Bxd5 {[%emt 0:00:22]} 26. Rd2 {[%emt 0:01:54]} Ne5 {[%emt 0:00:43]} 27. Ra1 {[%emt 0:00:36]} Rd6 {[%emt 0:04:51]} 28. Bc5 {[%emt 0:02:52]} Rc6 {[%emt 0:00:50]} 29. Qd4 {[%emt 0:01:03]} b6 30. Rd3 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.3"]
[White "Suarez, Pedro"]
[Black "Aguilar, Luis Miguel"]
[Result "1-0"]
[ECO "A61"]
[WhiteElo "2077"]
[BlackElo "2193"]
[Annotator "NA"]
[PlyCount "81"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 {[%emt 0:00:30]} Nf6 {[%emt 0:04:30]} 2. c4 {[%emt 0:00:00]} c5 {[%emt 0:00:30]} 3. d5 {[%emt 0:00:00]} e6 {[%emt 0:00:30]} 4. Nc3 {[%emt 0:00:30]} exd5 {[%emt 0:00:00]} 5. cxd5 {[%emt 0:00:30]} d6 {[%emt 0:00:00]} 6. Nf3 {[%emt 0:00:30]} g6 {[%emt 0:00:30]} 7. Bf4 {[%emt 0:00:00]} a6 {[%emt 0:00:30]} 8. a4 {[%emt 0:00:00]} Bg7 {[%emt 0:08:30]} 9. h3 {[%emt 0:00:30]} O-O {[%emt 0:00:30]} 10. e3 {[%emt 0:00:30]} Ne8 {[%emt 0:03:30]} 11. Be2 {[%emt 0:02:30]} Nd7 {[%emt 0:06:30]} 12. O-O {[%emt 0:03:30]} Rb8 {[%emt 0:02:30]} 13. Qc2 {[%emt 0:04:30]} Qe7 {[%emt 0:02:30]} 14. Rfd1 {[%emt 0:10:30]} Ne5 {[%emt 0:03:30]} 15. Rab1 {[%emt 0:05:30]} Bf5 {[%emt 0:13:30]} 16. e4 {[%emt 0:02:30]} Bd7 {[%emt 0:00:00]} 17. Nxe5 {[%emt 0:07:30]} Bxe5 {[%emt 0:00:00]} 18. Bxe5 {[%emt 0:00:30]} Qxe5 {[%emt 0:01:30]} 19. b4 {[%emt 0:03:30]} f5 {[%emt 0:29:30]} 20. bxc5 {[%emt 0:02:30]} dxc5 {[%emt 0:00:00]} 21. d6 {[%emt 0:04:30]} fxe4 {[%emt 0:02:00]} 22. Bc4+ {[%emt 0:00:30]} Kh8 {[%emt 0:00:30]} 23. Rd5 {[%emt 0:00:30]} Qf4 {[%emt 0:01:17]} 24. Nxe4 {[%emt 0:00:30]} Bc6 {[%emt 0:00:58]} 25. g3 {[%emt 0:01:30]} Qh6 {[%emt 0:07:06]} 26. Rxc5 {[%emt 0:06:30]} Rd8 {[%emt 0:00:46]} 27. Ng5 {[%emt 0:01:30]} Rxd6 {[%emt 0:04:58]} 28. Qc3+ {[%emt 0:01:30]} Nf6 {[%emt 0:01:13]} 29. Qe5 {[%emt 0:01:30]} Rd7 {[%emt 0:02:16]} 30. Ne6 {[%emt 0:00:30]} Re7 {[%emt 0:02:46]} 31. Qc3 {[%emt 0:01:30]} Rxe6 {[%emt 0:02:36]} 32. Bxe6 {[%emt 0:00:00]} Qg7 {[%emt 0:00:31]} 33. Re1 {[%emt 0:01:00]} Ne8 {[%emt 0:00:32]} 34. Qxg7+ {[%emt 0:00:30]} Nxg7 {[%emt 0:00:11]} 35. Bd5 {[%emt 0:00:00]} Bxa4 {[%emt 0:00:13]} 36. Bxb7 {[%emt 0:00:00]} Bb5 {[%emt 0:00:19]} 37. Rc7 {[%emt 0:00:30]} Nf5 {[%emt 0:00:39]} 38. g4 {[%emt 0:00:30]} Nd4 {[%emt 0:01:03]} 39. Ree7 {[%emt 0:00:00]} Nf3+ {[%emt 0:00:26]} 40. Bxf3 {[%emt 0:00:00]} Rxf3 {[%emt 0:00:04]} 41. Rc8+ {[%emt 0:00:00]} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.4"]
[White "Zambrano Acebo, Jean Junior"]
[Black "Menacho Admen, Victor Gabriel"]
[Result "1-0"]
[ECO "C62"]
[WhiteElo "2174"]
[BlackElo "1103"]
[Annotator "NA"]
[PlyCount "43"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 {[%emt 0:07:30]} e5 {[%emt 0:00:30]} 2. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:00]} 3. Bb5 {[%emt 0:02:00]} d6 {[%emt 0:01:00]} 4. d4 {[%emt 0:03:30]} f6 {[%emt 0:05:30]} 5. h3 {[%emt 0:06:30]} Bd7 {[%emt 0:07:30]} 6. Nc3 {[%emt 0:04:30]} a6 {[%emt 0:02:30]} 7. Ba4 {[%emt 0:00:30]} exd4 {[%emt 0:09:30]} 8. Nxd4 {[%emt 0:00:30]} Nxd4 {[%emt 0:00:30]} 9. Bxd7+ {[%emt 0:00:00]} Qxd7 {[%emt 0:00:00]} 10. Qxd4 {[%emt 0:00:00]} Ne7 {[%emt 0:09:00]} 11. b3 {[%emt 0:23:30]} Nc6 {[%emt 0:03:30]} 12. Qd2 {[%emt 0:02:30]} Ne7 {[%emt 0:15:30]} 13. Bb2 {[%emt 0:03:30]} O-O-O {[%emt 0:02:30]} 14. O-O-O {[%emt 0:01:30]} c6 {[%emt 0:01:30]} 15. f4 {[%emt 0:06:30]} d5 {[%emt 0:09:30]} 16. e5 {[%emt 0:04:30]} fxe5 {[%emt 0:01:30]} 17. Na4 {[%emt 0:01:30]} Kb8 {[%emt 0:02:30]} 18. Bxe5+ {[%emt 0:00:30]} Ka7 {[%emt 0:01:30]} 19. Qd4+ {[%emt 0:00:00]} b6 {[%emt 0:03:30]} 20. Qxb6+ {[%emt 0:00:00]} Ka8 {[%emt 0:00:30]} 21. Qxa6+ {[%emt 0:00:30]} Qa7 {[%emt 0:00:30]} 22. Nb6# 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.5"]
[White "Zapata Charles, Santiago"]
[Black "Vazquez, Facundo"]
[Result "1-0"]
[ECO "C06"]
[WhiteElo "2322"]
[BlackElo "2086"]
[Annotator "ChessBase"]
[PlyCount "112"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 {[%emt 0:00:30]} e6 {[%emt 0:00:30]} 2. d4 {[%emt 0:00:00]} d5 {[%emt 0:00:30]} 3. Nd2 {[%emt 0:00:00]} Nf6 {[%emt 0:00:00]} 4. e5 {[%emt 0:00:00]} Nfd7 {[%emt 0:00:00]} 5. Bd3 {[%emt 0:00:00]} c5 {[%emt 0:00:30]} 6. c3 {[%emt 0:00:00]} Nc6 {[%emt 0:01:30]} 7. Ne2 {[%emt 0:00:00]} cxd4 {[%emt 0:00:00]} 8. cxd4 {[%emt 0:00:00]} f6 {[%emt 0:03:00]} 9. exf6 {[%emt 0:00:00]} Nxf6 {[%emt 0:00:00]} 10. O-O {[%emt 0:00:00]} Bd6 {[%emt 0:02:00]} 11. Nf3 {[%emt 0:00:00]} Qc7 {[%emt 0:00:30]} 12. h3 {[%emt 0:00:30]} O-O {[%emt 0:04:30]} 13. Be3 {[%emt 0:01:30]} Bd7 {[%emt 0:03:30]} 14. Rc1 {[%emt 0:00:00]} Rac8 {[%emt 0:06:30]} 15. a3 {[%emt 0:04:00]} Qb6 {[%emt 0:07:30]} 16. b4 {[%emt 0:02:30]} a5 {[%emt 0:07:30]} 17. b5 {[%emt 0:01:30]} Nd8 {[%emt 0:01:30]} 18. Rxc8 {[%emt 0:04:30]} Bxc8 {[%emt 0:00:30]} 19. a4 {[%emt 0:00:30]} Nf7 {[%emt 0:00:30]} 20. Ne5 {[%emt 0:01:30]} Qd8 {[%emt 0:07:30]} 21. f4 {[%emt 0:01:30]} Bb4 {[%emt 0:06:30]} 22. Qb1 {[%emt 0:03:30]} Nd6 {[%emt 0:06:30]} 23. Ng3 {[%emt 0:12:30]} Qe7 {[%emt 0:05:30]} 24. Rf3 {[%emt 0:03:30]} g6 {[%emt 0:03:30]} 25. Rf2 {[%emt 0:13:30]} Nf5 {[%emt 0:02:30]} 26. Nxf5 {[%emt 0:00:30]} exf5 {[%emt 0:00:30]} 27. Bd2 {[%emt 0:26:30]} Bxd2 {[%emt 0:18:51]} 28. Rxd2 {[%emt 0:00:30]} Nh5 {[%emt 0:00:36]} 29. Rf2 {[%emt 0:00:30]} Be6 {[%emt 0:00:37]} 30. Qe1 {[%emt 0:00:30]} Qb4 {[%emt 0:00:33]} 31. Qxb4 {[%emt 0:00:30]} axb4 {[%emt 0:00:37]} 32. Rb2 {[%emt 0:00:30]} Nxf4 {[%emt 0:00:34]} 33. Bf1 {[%emt 0:03:30]} Ra8 {[%emt 0:01:37]} 34. Rxb4 {[%emt 0:00:30]} Kf8 {[%emt 0:00:30]} 35. b6 {[%emt 0:00:30]} Ke7 {[%emt 0:00:30]} 36. Bb5 {[%emt 0:00:30]} Bc8 {[%emt 0:00:30]} 37. Kf2 {[%emt 0:08:24]} Ne6 {[%emt 0:01:43]} 38. Ke3 {[%emt 0:00:57]} Nf8 {[%emt 0:01:35]} 39. Rb2 {[%emt 0:03:46]} g5 {[%emt 0:02:59]} 40. Rc2 {[%emt 0:05:06]} f4+ {[%emt 0:00:19]} 41. Kd2 {[%emt 0:00:49]} Ne6 {[%emt 0:00:04]} 42. Kc3 {[%emt 0:00:19]} Nd8 {[%emt 0:01:59]} 43. Kb4 {[%emt 0:00:44]} Ne6 {[%emt 0:00:25]} 44. Re2 {[%emt 0:01:46]} Kf6 {[%emt 0:01:50]} 45. Kc3 {[%emt 0:01:12]} h5 {[%emt 0:00:13]} 46. Nd3 {[%emt 0:00:13]} g4 {[%emt 0:01:57]} 47. hxg4 {[%emt 0:00:05]} hxg4 {[%emt 0:00:01]} 48. Nb4 {[%emt 0:00:21]} f3 {[%emt 0:00:51]} 49. gxf3 {[%emt 0:00:01]} gxf3 {[%emt 0:00:02]} 50. Nxd5+ {[%emt 0:00:13]} Kg5 {[%emt 0:00:21]} 51. Re5+ {[%emt 0:00:47]} Kg4 {[%emt 0:00:50]} 52. Ne7 {[%emt 0:01:54]} Nf4 {[%emt 0:00:54]} 53. Kd2 {[%emt 0:00:27]} Be6 {[%emt 0:00:40]} 54. Ke3 {[%emt 0:01:13]} Rh8 {[%emt 0:01:09]} 55. Re4 {[%emt 0:00:15]} Rf8 {[%emt 0:01:11]} 56. Ng6 {[%emt 0:00:08]} f2 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.6"]
[White "Gimenez Aguirre, Alejo Ismael"]
[Black "Donoso Diaz, Sebastian"]
[Result "1-0"]
[ECO "B44"]
[WhiteElo "2247"]
[BlackElo "2251"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,65,-19,-22,-31,-43,-16,-16,0,-4,5,0,69,46,105,83,99,21,29,0,0,0,0,0,18,23,103,105,187,185,235,239,231,239,228,200,312,306,618,623,808,802,780,793,781,776,774,775,870,840,1106,1100,1229,1255]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6. Nc3 Bb4 7. f3 d5 8. cxd5 exd5 {B44: Sicilian: Taimanov: 5 Nb5} 9. Bb5 Qb6 {White must now prevent ...0-0.} (9... Bd7 10. exd5 Nxd5 11. O-O Nxc3 12. bxc3 Bxc3 13. Bxc6 bxc6 14. Bb2 Bxb2 15. Qe2+ Qe7 16. Qxb2 {0-1 (36) Beukema,S (2280)-Simonian,T (2401) Groningen 2013}) 10. O-O O-O {The position is equal.} 11. Bxc6 $1 bxc6 12. e5 $146 ({Predecessor:} 12. Na4 Qc7 13. exd5 Nxd5 14. Qc2 Bd6 15. f4 Nxf4 16. Bxf4 Bxf4 17. Qxc6 Bxh2+ {0-1 (30) Kantor,R (1949)-Krajnak,R (2075) Slovakia 2013}) 12... Ne8 (12... Nd7 $11) 13. Be3 (13. Na4 $5 {[%cal Ra4b6]} Qc7 14. Bd2 $14) 13... Ba6 (13... Qb7 $14) 14. Re1 $36 {[%mdl 2048] White is on the roll.} Qb7 {Threatens to win with ...c5.} 15. Nb3 ({Better is} 15. a3 $16 Bc5 16. Na4 Bxd4 17. Qxd4) 15... Nc7 $11 16. Rc1 Ne6 {Hoping for ...d4!} 17. a3 Bxc3 18. Rxc3 Bc4 19. Qc2 Qc7 (19... Rfb8 $11 {keeps the balance.} 20. Na5 Qxb2) 20. Nc5 $16 Qxe5 (20... Rfe8 $16) 21. Nd7 $18 {[%mdl 64] [#] Double Attack} Qh5 22. Nxf8 Rxf8 23. Bxa7 Bb5 24. Qf2 Nf4 (24... Qg5 {was called for.} 25. b3 Rc8) 25. Qe3 Qf5 $2 (25... d4 26. Bxd4 (26. Qxf4 dxc3 27. bxc3 f6 $16) 26... Nd5) 26. Bc5 {White is clearly winning.} d4 {[#]} 27. Qe8 $1 {[%csl Gc5][%cal Re8f8][%mdl 512]} Ne6 (27... Rxe8 28. Rxe8#) 28. Bxf8 Nxf8 29. Rcc1 d3 30. Qd8 c5 31. Qd6 g6 32. Rxc5 d2 33. Rd1 {Accuracy: White = 69%, Black = 30%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.7"]
[White "Cosme Contreras, Trilce"]
[Black "Cantero, Rodolfo"]
[Result "0-1"]
[ECO "A32"]
[WhiteElo "2051"]
[BlackElo "2059"]
[Annotator "NA RC"]
[PlyCount "114"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 c5 5. e3 O-O 6. Nc3 cxd4 7. Nxd4 Nc6 8. Be2 d5 9. Nxc6 bxc6 10. O-O Bd6 11. Rc1 Rb8 12. Na4 Ne4 13. Be1 f5 14. f3 Nf6 15. c5 Bc7 16. b3 Qe8 17. Nb2 Qh5 18. f4 Qh6 19. Bc3 e5 20. Nd3 Nd7 21. Bb2 Ba6 22. g3 e4 23. Nf2 Bxe2 24. Qxe2 Rb5 25. Bd4 a5 26. Kh1 a4 27. bxa4 Ra5 28. Rg1 Rxa4 29. Rc2 g6 30. Ba1 Bd8 31. g4 Qh4 32. Rg3 fxg4 33. Nxg4 Bf6 34. Nxf6+ Nxf6 35. Qg2 Qh5 36. Rc1 Nd7 37. Qb2 Nf6 38. Rf1 Qf5 39. Qg2 Nd7 40. Rg5 Qf7 41. f5 d4 42. Bxd4 Rxa2 43. Qg3 Qc4 44. Rb1 Rf7 45. Qg1 Qe2 46. Rf1 Kf8 47. Rf4 Rd2 48. Rf1 Ke7 49. f6+ Nxf6 50. Re5+ Kf8 51. Rg5 Nh5 52. Rxf7+ Kxf7 53. Rg2 Qf3 54. Bc3 Re2 55. Bd4 Ke6 56. h4 Ng3+ 57. Kh2 Nf1+ 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.8"]
[White "Cadilhac, Igor Tokuichi Kikuc"]
[Black "Mayeregger, Arnold"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "2288"]
[BlackElo "1913"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,65,5,11,10,4,-11,0,-3,0,-27,14,15,2,17,17,0,0,0,84,88,95,72,93,76,100,98,135,87,152,153,274,99,112,91,93,97,108,99,121,42,50,53,239,212,810,791,1221,976,29989,29990,29990,1848,1728,1498]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Qc7 6. Ne2 Bg4 7. f3 Bd7 8. O-O {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack} Nf6 9. Bg5 $146 ({Predecessor:} 9. Re1 e5 10. dxe5 Nxe5 11. Bf4 Bd6 12. Bxe5 Bxe5 13. f4 Bd6 14. Nd4+ Kf8 {1-0 (23) Perelshteyn,E (2524)-Shmeliov,D (2412) Manchester 2016}) 9... e6 10. f4 {The position is equal.} Bd6 11. Ng3 h6 12. Bxf6 $1 gxf6 13. Nh5 $36 {[%mdl 2048] White has some pressure.} O-O-O 14. Nxf6 Bxf4 15. Qh5 Rdf8 (15... Qb6 $11 {remains equal.} 16. Qe2 Qc7) 16. Na3 $16 a6 17. Rf3 Bd6 18. Nc2 Nd8 19. Ne3 Qb6 20. b3 Ba3 (20... Qc7 $142) 21. Raf1 Bb5 (21... Qc7 $16 {might work better.}) 22. Nfxd5 $2 (22. Bxb5 $18 {has better winning chances.} Qxb5 23. Qh3) 22... exd5 23. Nxd5 Qd6 24. Bxb5 axb5 25. b4 Rfg8 26. Rf6 ({White should play} 26. Qf5+ $16 Kb8 27. Nf6) 26... Ne6 $14 27. Ne3 (27. Qxf7 Qxd5 28. Qxe6+ Qxe6 $15) 27... Rg6 $2 ({Black should try} 27... Qc7 $1 $14) 28. Nf5 $18 ({But not} 28. Rxg6 fxg6 29. Qxg6 (29. Qxb5 Nc7 $11) 29... Rd8) (28. Rxf7 $6 Rhg8) (28. Qxb5 $6 Rxf6 29. Rxf6 Bc1 $16) 28... Qd7 $2 {[#]} (28... Rxg2+ 29. Kxg2 Nf4+ {[%mdl 64] Discovered Attack} 30. Rxf4 Qxf6) 29. Rxf7 $1 {[%mdl 512]} Rg5 (29... Qxf7 30. Nd6+) 30. Qf3 {Played: Qh5-e2} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.9"]
[White "Gomez Barrera, Gonzalo Andres"]
[Black "Allo Collante, Enrique"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "2058"]
[BlackElo "1595"]
[Annotator "NA RC"]
[PlyCount "58"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 h5 5. Bd3 Bxd3 6. Qxd3 e6 7. Bg5 Be7 8. Nf3 Nh6 9. Bxh6 Rxh6 10. c4 dxc4 11. Qxc4 Rg6 12. O-O Nd7 13. Nc3 Nb6 14. Qb3 Rg4 15. a4 a5 16. Rfe1 Bb4 17. Re2 Bxc3 18. bxc3 Qd5 19. Qxd5 Nxd5 20. Rc2 Ke7 21. Rb1 b6 22. g3 f5 23. exf6+ gxf6 24. Kh2 Re4 25. Nd2 Re2 26. Kg2 Rb8 27. Kf3 Rxd2 28. Rxd2 Nxc3 29. Rc2 Nxb1 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.10"]
[White "Orrego Palermo, Marcelo"]
[Black "Benitez Galeano, Alejandro"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1632"]
[BlackElo "2052"]
[Annotator "NA"]
[PlyCount "66"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Nf3 Bd6 5. Nbd2 O-O 6. Bd3 c5 7. c3 Bxf4 8. exf4 Qd6 9. g3 b6 10. O-O Ba6 11. Qe2 Bxd3 12. Qxd3 Nc6 13. Ne5 Rfc8 14. Rac1 c4 15. Qe3 b5 16. b3 Qa3 17. Ra1 a5 18. Rfc1 Rab8 19. h3 Qd6 20. g4 cxb3 21. axb3 Ra8 22. Ndf3 b4 23. Nxc6 Rxc6 24. Ne5 Rcc8 25. c4 dxc4 26. Nxc4 Qd8 27. Rxa5 Rxc4 28. Rxa8 Rxc1+ 29. Qxc1 Qxa8 30. Qc5 Nd5 31. f5 exf5 32. gxf5 h6 33. f3 Nf4 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.11"]
[White "Araoz Andrade, Ivan Alexander"]
[Black "Ayala Ruiz, Miguel Angel"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "1843"]
[BlackElo "1444"]
[Annotator "NA"]
[PlyCount "49"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O Qc7 7. Qe2 Nc6 8. Nxc6 bxc6 9. e5 Nd5 10. a3 Be7 11. c4 Nb6 12. Nc3 c5 13. f4 f6 14. Qh5+ Kf8 15. exf6 Bxf6 16. f5 Qe5 17. Bf4 Qd4+ 18. Kh1 e5 19. Rad1 g6 20. Bh6+ Ke7 21. fxg6 hxg6 22. Qxg6 Qh4 23. Rxf6 Rxh6 24. Qg7+ Kd8 25. Qf8+ 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "2.12"]
[White "Avalos Sanabria, Augusto Alfredo"]
[Black "Melian, Juan Sebastian"]
[Result "0-1"]
[ECO "B40"]
[WhiteElo "1474"]
[BlackElo "1786"]
[Annotator "NA"]
[PlyCount "64"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. Nc3 e6 3. Nf3 a6 4. Be2 b5 5. a3 Bb7 6. d3 d6 7. O-O Nf6 8. h3 Nbd7 9. Bg5 h6 10. Bh4 Be7 11. Qd2 g5 12. Bg3 g4 13. Ne1 gxh3 14. gxh3 h5 15. Kh2 h4 16. Bf4 Qc7 17. Bg4 Nxg4+ 18. hxg4 Nf6 19. f3 e5 20. Be3 d5 21. Bf2 O-O-O 22. Qe2 d4 23. Nd1 Nh7 24. c3 Nf8 25. cxd4 exd4+ 26. Kh3 Ng6 27. Ng2 Qf4 28. Qe1 Qxf3+ 29. Kh2 Bd6+ 30. Kg1 h3 31. Nde3 dxe3 32. Nxe3 h2# 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.1"]
[White "Estrada Lavin, Cristian Alexand"]
[Black "Munoz, Francisco Javier"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "2116"]
[BlackElo "2308"]
[Annotator "TA"]
[PlyCount "24"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,24,20,20,12,32,14,40,40,40]} 1. Nf3 d5 2. b3 Nf6 3. Bb2 e6 4. c4 Be7 5. e3 O-O 6. Nc3 c5 7. cxd5 Nxd5 8. Nxd5 Qxd5 9. Bc4 Qd8 10. O-O {A13: English Opening: 1...e6} Nc6 11. Qc2 (11. d4 cxd4 12. Nxd4 Nxd4 13. Bxd4 Bd7 14. Qh5 Bc6 15. Rad1 Qc7 16. Bd3 g6 17. Qe2 e5 {½-½ (47) Bocharov,D (2594)-Grachev,B (2653) Serpukhov 2018}) 11... b6 $146 ({Predecessor:} 11... Bd7 12. d4 cxd4 13. Nxd4 Qa5 14. Rfd1 Rfd8 15. Nf3 Be8 {½-½ (15) Antoniewski,R (2522)-Cvek,R (2537) Slovakia 2015}) 12. d4 cxd4 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.2"]
[White "Suarez, Pedro"]
[Black "Zambrano Acebo, Jean Junior"]
[Result "0-1"]
[ECO "E43"]
[WhiteElo "2077"]
[BlackElo "2174"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,88,18,-26,-18,-22,-12,-27,-9,-3,-4,-10,-4,-2,-9,0,-6,-39,-29,-37,-10,-57,-59,-100,0,0,0,-37,-38,-29,-10,-63,-40,-116,-115,-114,-103,-104,-94,-102,-96,-96,-86,-160,-187,-189,-190,-345,-352,-660,-659,-635,-654,-640,-640,-598,-620,-608,-596,-535,-575,-2030,-2019,-29978,-29979,-29979,-29980,-29979,-29980,-29991,-29992,-29993,-29992]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Bd3 Bb7 6. f3 c5 7. Nge2 d5 8. O-O O-O 9. a3 cxd4 10. exd4 Be7 {E43: Nimzo-Indian: Rubinstein: 4...b6} (10... dxc4 11. Bxc4 Be7 12. Be3 Nc6 13. b4 Rc8 14. Qb3 Qc7 15. Bf4 Nxd4 16. Bxc7 Nxb3 17. Bxb3 Rxc7 18. Nb5 {0-1 (56) Buendia Pinar,A (2307)-Tejedor Fuente,E (2361) Linares 2017}) 11. Be3 Nc6 12. Rc1 Rc8 {Black has an edge.} 13. cxd5 Nxd5 14. Nxd5 Qxd5 $146 ({Predecessor:} 14... exd5 15. Qd2 Re8 16. Bf5 Ra8 17. b4 Bf6 18. Rfe1 a5 19. b5 Na7 20. Bd3 Nc8 21. Bf4 Nd6 {0-1 (21) Siger,I (1579)-Harney,T (2068) LSS email 2013}) 15. Be4 Qd7 16. Qa4 a6 {[%cal Ba7a6,Ba6a5][%mdl 32]} 17. b4 b5 18. Qb3 a5 {[%cal Ra5b4]} 19. Qb1 f5 20. Bd3 Ba6 (20... axb4 $17 21. Bxb5 bxa3) 21. bxa5 Nxa5 22. Qa2 Nc4 23. Bf2 Bg5 $36 {[%mdl 2048] Black is pushing.} 24. f4 (24. Ra1 $11) 24... Bf6 25. Bxc4 ({White should play} 25. Rfd1 $15) 25... bxc4 26. Rfd1 Bb7 {[#] White must now prevent ...Qd5.} 27. Nc3 Bd5 28. Rb1 Rb8 29. a4 Qc6 30. Be3 (30. Nxd5 $142 exd5 31. Qc2) 30... Rb3 $17 31. Nxd5 Qxd5 32. Rxb3 $2 (32. Bf2) 32... cxb3 $19 33. Qb2 $2 (33. Qe2) 33... Rc8 {And now ...Rc2 would win.} 34. Rd2 Rc4 35. a5 Ra4 36. Qc3 Rxa5 37. Rb2 Ra1+ 38. Kf2 Ra2 39. Rxa2 bxa2 40. Qb2 Qa5 {Black mates.} 41. Qa1 Qa4 42. Kf3 Qc2 43. Bc1 Qe4+ {[%mdl 64] [#] Double Attack} 44. Kg3 Qd3+ {Accuracy: White = 21%, Black = 64%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.3"]
[White "Cantero, Rodolfo"]
[Black "Gimenez Aguirre, Alejo Ismael"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "2059"]
[BlackElo "2247"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,97,-7,-11,-14,-19,-35,-14,-22,-16,-25,-22,-19,-22,-29,-16,-27,0,0,0,0,0,0,-17,-21,-21,-38,-32,-39,-28,-35,30,54,142,18,75,90,79,-8,-12,-42,-22,-4,0,-67,-28,-77,-45,-178,-116,-121,-83,-130,-116,-155,-175,-166,-110,-122,0,-130,-137,-139,-138,-132,-104,-101,-107,-89,-94,-94,-92,-291,-239,-446,-434,-567,-566,-543,0,0,0,0,58,-8,-8,-31,12845,12845]} 1. e4 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 d6 6. d3 a6 7. a4 {A36: Symmetrical English vs ...g6: 4 Bg2 Bg7} (7. Nge2 Rb8 8. a4 Nf6 9. O-O O-O 10. Rb1 Bd7 11. Be3 Ng4 12. Bg5 h6 13. Bc1 Nb4 14. f4 f5 {0-1 (48) Berkes,F (2696)-Tadic,B (2506) Jahorina 2012}) 7... h5 8. h4 $146 ({Predecessor:} 8. h3 Rb8 9. Nge2 Bd7 10. Rb1 Nd4 11. Bd2 Nh6 12. b4 b6 13. Nxd4 cxd4 14. Ne2 e5 {½-½ (47) Hofland,L (2289)-Miezis,N (2527) Dieren 2005}) 8... Nd4 9. Nce2 {The position is equal.} Bg4 10. f3 Bd7 11. Nxd4 Bxd4 12. Ne2 Bg7 13. a5 b5 14. axb6 Qxb6 15. O-O Nf6 16. Nc3 O-O 17. Kh2 Rfb8 18. Rf2 Bc6 19. Bh3 e6 20. f4 d5 (20... Qb3 $15) 21. e5 Nh7 (21... Ng4+ $1 $14 22. Bxg4 hxg4) 22. g4 (22. cxd5 $16 exd5 23. Bg2) 22... hxg4 (22... Qd8 $11 {keeps the balance.} 23. g5 d4) 23. Qxg4 $16 dxc4 24. Be3 (24. dxc4 $16 Qc7 25. h5) 24... cxd3 $11 25. Rg1 Rb7 26. h5 Nf8 27. Qg3 ({White should play} 27. hxg6 $11 fxg6 28. Bg2) 27... Re8 28. Bf1 Rd7 29. Bc1 (29. Rd2 $15) 29... c4 ({Better is} 29... Red8 $1 $19 30. hxg6 fxg6) 30. Be3 $17 Qa5 31. Bd2 Qc5 32. Nd1 f6 {[%cal Rf6e5]} 33. Bc3 f5 ({Black should try} 33... fxe5 $19 34. hxg6 exf4 35. Rxf4 Qh5+ 36. Bh3 d2) 34. hxg6 Bh8 (34... a5 $17 35. Bg2 Bxg2 36. Rgxg2 Rb8) 35. Qh4 (35. Bg2 $1 $11) 35... Rg7 36. Qh5 {[#]} Ba4 $1 $36 {[%cal Ra4d1][%mdl 2048] Hoping for ...Bxd1. Black is in control.} 37. Rfg2 Rd8 ({Don't play} 37... Bxd1 38. Qxd1 Qe3 39. Bd2 $15) 38. Qh4 Qe7 39. Qxe7 Rxe7 40. Ne3 Bb3 41. Be1 $2 (41. Kh3 $17 {is a better defense.}) 41... Rd4 $19 42. Bh4 $2 (42. Rf2 {was forced.}) 42... Rg7 43. Bg5 Nxg6 44. Bh6 {[#]} Rh7 $2 (44... Rxf4 $1 $19 {[%mdl 512] And now ...Rh4+ would win.} 45. Bxf4 Nxf4) 45. Rxg6+ $11 {[%mdl 64] Double Attack} Kf7 {Threatens to win with ...Rxf4.} 46. Bh3 {Black must now prevent Nxf5!} d2 (46... c3 $1 $11 47. Nxf5 (47. bxc3 Re4 $11) 47... Rd7 48. bxc3 d2 49. Nd6+ Rxd6 50. exd6 d1=Q 51. Rxd1 Kxg6) 47. Bxf5 (47. Rxe6 $1 $14 d1=Q 48. Rxd1 (48. Nxd1 $2 {is the wrong capture.} Rd2+ 49. Nf2 Rxf2+ 50. Kg3 Kxe6 $19) 48... Bxd1 49. Bxf5 Bxe5 50. fxe5 (50. Bxh7 Bxf4+ 51. Bxf4 Kxe6 $16) 50... Rh4+ 51. Kg3 R4xh6 52. Rxh6 Rxh6 53. Nxd1) 47... exf5 48. Nxf5 {White threatens e6+ and mate.} Rxh6+ $2 {[%mdl 8192]} (48... c3 $15 49. Nxd4 d1=Q 50. Rxd1 Bxd1) 49. Rxh6 {Accuracy: White = 35%, Black = 42%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.4"]
[White "Coro, Lucas"]
[Black "Zapata Charles, Santiago"]
[Result "0-1"]
[ECO "C03"]
[WhiteElo "2315"]
[BlackElo "2322"]
[Annotator "TA"]
[PlyCount "130"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,146,16,27,21,33,25,38,14,28,45,37,31,32,31,38,31,25,22,25,8,11,0,11,0,13,8,12,0,0,0,37,21,70,62,64,58,98,95,112,91,108,81,127,119,139,136,133,139,135,131,127,123,130,130,229,243,268,236,228,229,216,205,271,261,333,298,295,188,231,213,222,212,232,229,222,220,210,200,201,195,377,347,917,589,538,546,518,278,452,0,283,0,222,122,446,293,635,605,616,631,630,623,593,591,752,0,446,-218,-218,-5639,-74,-29992,-29966,-5065,-218,-89,-109,-210,-210,-209,-194,-124,-124,-124,-124,-29960,-29960,-29954,-7539,-29980,-29981,-29981,-29982,-29982,-29981,-29981,-29982,-29982,-29983]} 1. e4 e6 2. d4 d5 3. Nd2 Be7 4. e5 c5 5. c3 Nc6 6. Bd3 {C03: French Tarrasch: Unusual Black 3rd moves} cxd4 (6... Bd7 7. Qg4 Kf8 8. Ne2 h5 9. Qf3 cxd4 10. cxd4 Qb6 11. Nb3 a5 12. Nf4 Ke8 13. Nxh5 a4 14. Nxg7+ {1-0 (46) Mamedov,R (2703)-Lagarde,M (2616) Skopje 2018}) 7. cxd4 Nh6 (7... Nxd4 $2 8. Qg4 $18) 8. Ne2 {White is slightly better.} Nf5 9. Nf3 Qb6 10. O-O Bd7 {[%cal Rc6d4]} 11. Kh1 Nb4 $146 (11... Ncxd4 $2 12. Nexd4 Nxd4 13. Be3 $18) ({Predecessor:} 11... Rc8 12. Rb1 Nb4 13. Bxf5 exf5 {1-0 (43) Erenburg,S (2550)-Cruz,C (2558) Medellin 2017}) 12. Bxf5 exf5 13. a3 Nc6 14. Nc3 Be6 15. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} h6 16. Qd3 Rc8 17. Bd2 g5 18. b5 $36 {[%mdl 2048] White has the initiative.} Na5 $1 19. Na4 Qd8 20. Nc5 Rb8 21. Bb4 Nc4 22. Nd2 Nxd2 23. Qxd2 O-O 24. Rac1 Re8 25. Rc2 Bc8 26. f4 Qb6 27. a4 {[%cal Ba3a4,Ba4a5][%mdl 32]} Qg6 28. Nd3 Bd8 29. Bd6 Ra8 30. a5 Bd7 31. Rb1 a6 (31... Be6 $16 32. a6 b6) 32. b6 $18 Bb5 33. Nc5 Bc6 34. Rf1 Kh7 35. Rb2 g4 36. Rc1 Qh5 37. g3 Qg6 38. Qd3 Be7 39. Bxe7 Rxe7 40. Qa3 Rae8 41. Rbc2 Bb5 42. Na4 Bc4 43. Nb2 Qe6 44. Qb4 {[%cal Rb2c4]} Bb5 $2 (44... Kg6 45. Nxc4 dxc4 46. Rxc4 (46. Qxc4 Rd8 $18) 46... Rd7) 45. Rc7 Bc6 $2 (45... Kg8 46. Kg1 f6) 46. Rxe7 Rxe7 47. Nd3 Re8 48. Nc5 Qg6 $2 (48... Qc8 {was worth a try.} 49. Rc3 Rg8) 49. Nd3 $2 (49. Qc3 $18) 49... Bb5 $2 {[%mdl 8192]} (49... Qe6 $1 $11 {and Black stays safe.}) 50. Rc3 $2 (50. Qb1 $18) 50... h5 $2 (50... Bxd3 $1 $11 {and Black is okay.} 51. Rxd3 Rc8) 51. Qd6 (51. Ne1 $18) 51... Re6 $2 {[%mdl 8192]} (51... Bxd3 $16 52. Rxd3 Kg7 53. Qxd5 Qe6 54. Qxe6 (54. Qxb7 Qa2 $16) 54... fxe6) 52. Qc7 {Strongly threatening Nc5.} h4 $2 (52... Bxd3 53. Rxd3 Rc6 54. Qxb7 h4) 53. Nc5 Rc6 54. Qxb7 hxg3 55. Rxg3 Rxc5 56. dxc5 {[%mdl 4096] Endgame KQR-KQB} d4 {aiming for ...Bc6+.} 57. Qc7 $2 ({White should play} 57. Qc8 $18) 57... d3 $2 {[%mdl 8192]} (57... Qe6 $1 $11 {and Black has nothing to worry.} 58. Qd8 Qc6+ 59. Kg1 Qe4 60. Qh4+ Kg8) 58. Rxd3 $4 {[%mdl 8192]} (58. h3 $18 {is the narrow road to win.}) 58... Bxd3 $19 59. Qd7 $2 (59. Qe7 Be4+ 60. Kg1) 59... Bb5 $2 (59... Be4+ $19 {has better winning chances.} 60. Kg1 g3) 60. Qd6 $2 {[%mdl 8192]} (60. Qe7 $17) 60... Bc6+ 61. Kg1 Be4 $2 (61... g3 {( -> ...gxh2+)} 62. Qxg6+ Kxg6 63. hxg3 Kh5) 62. Qe7 Qe6 63. Qh4+ ({But not} 63. Qxe6 $2 fxe6 64. Kf2 Kg6 $19) (63. Qg5 $17 {was the only chance.}) 63... Kg7 64. Qg5+ {[#]} Qg6 $1 {[%cal Rg6g5]} 65. Qh4 {[#]} (65. Qxg6+ $19 Kxg6 66. Kf2) 65... f6 {Played: Qg6-h6} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.5"]
[White "Benitez Galeano, Alejandro"]
[Black "Cadilhac, Igor Tokuichi Kikuc"]
[Result "1-0"]
[ECO "A35"]
[WhiteElo "2052"]
[BlackElo "2288"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,95,28,24,35,31,44,37,37,31,33,31,56,50,69,59,67,54,65,50,181,84,82,35,79,66,82,29,30,21,92,108,113,135,166,161,195,170,189,168,241,182,182,162,159,70,167,166,865,464,867,491,707,710,955,93,95,93,89,91,127,141,137,135,237,8,8,8,102,30,837,825,29965,29962,29995,29972]} 1. Nf3 c5 2. c4 Nc6 3. Nc3 g6 4. e3 Nf6 5. d4 cxd4 6. exd4 d5 7. cxd5 Nxd5 8. Qb3 Nxc3 9. Bc4 Nd5 10. Bxd5 e6 11. Bxc6+ bxc6 12. O-O f6 {A35: Symmetrical English: 2 Nc3 Nc6 3 Nf3} 13. Be3 Qd5 14. Rfc1 Bd6 {White is slightly better.} 15. Nd2 Bd7 16. Qc2 Kf7 17. Ne4 Rhb8 18. f3 {[#]} a5 $146 ({Predecessor:} 18... Be7 19. Qf2 Kg7 20. b3 {1-0 (67) Nepomniachtchi,I (2714)-Vidit,S (2625) Moscow 2015}) 19. Qf2 {aiming for Qh4!} Be7 $1 20. b3 {[%cal Bb2b3,Bb3b4][%mdl 32]} f5 (20... Be8 $14) 21. Nc5 (21. Bg5 $18 {is more deadly. Bxe7 is the strong threat.} Bxg5 22. Rc5 (22. Nxg5+ Kg7 $14)) 21... Bf6 22. Nd3 a4 23. b4 a3 24. h4 (24. Rc5 $16 Qd6 25. Rac1) 24... Rb5 25. Rab1 Qd6 (25... Kg8 $11 {remains equal.}) 26. Rc4 $16 e5 27. Nxe5+ Bxe5 28. dxe5 Qxe5 29. Bf4 Qe6 30. Rd4 $1 Rd5 (30... Re8 $142 31. Rd6 Qe7) 31. Rbd1 Re8 32. Rxd5 cxd5 33. Qd4 (33. Qa7 $16) 33... Qe2 (33... Bb5 $1 $14) 34. Bh6 $18 ({Don't do} 34. Qxd5+ $6 Be6 $14) 34... Bc6 $2 (34... Qe5) 35. Rc1 {Qg7+ would kill now.} Qb2 (35... Qe5 $142 36. Qxe5 Rxe5 37. Rxc6 Re1+ 38. Kf2 Rb1 39. Rc7+ Ke6 40. Rxh7 Rxb4) 36. Qa7+ Re7 (36... Kg8 $142 37. Rxc6 Re1+ 38. Kh2 Qe5+ 39. f4 Rh1+ 40. Kg3 (40. Kxh1 Qe1+ {[%mdl 64] Double Attack} 41. Kh2 Qxh4+ {[%mdl 64] Double Attack} 42. Kg1 Qe1+ {[%mdl 64] Double Attack} 43. Kh2 Qh4+ {[%mdl 64] Double Attack} 44. Kg1 Qe1+ {[%mdl 64] Double Attack} 45. Kh2 Qh4+ $11 {[%mdl 64] Double Attack}) 40... Qe1+ 41. Qf2 Qxf2+ 42. Kxf2 Kf7) 37. Qc5 Bb7 38. Rc2 $2 (38. Bg5 $18 {is the precise move to win.} Re8 39. Qc7+ {[%mdl 64] Double Attack} Kg8 40. Qxb7 Qd4+ 41. Kh1) 38... Qa1+ $16 39. Kh2 Qe5+ 40. Kh3 $1 f4 41. Bg5 $1 Rd7 42. Kh2 $1 {Hoping for Rc4!} Kg7 {[#]} (42... Qe3 $16) 43. Qc3 $2 (43. Rc4 $1 $18 {[%cal Rc4e4][%mdl 512] Threatens to win with Re4!} Qe1 (43... dxc4 44. Qxe5+) 44. Rxf4) 43... d4 $11 44. Qd2 d3 (44... Rf7 $11) 45. Rc3 {[#]} (45. Bxf4 $16 Qe7 46. Bh6+ Kf7 47. Rc4 Qe5+ 48. Rf4+ Ke6 49. Bg5) 45... Qe2 $2 {[%mdl 8192]} (45... Bxf3 $1 $11 {[%mdl 512]} 46. Bxf4 (46. gxf3 Qe2+ 47. Qxe2 dxe2 $11) 46... Qe2) 46. Qxf4 $18 {White wants to mate with Bh6+.} h6 47. Rc7 Bc8 48. Qd4+ {Accuracy: White = 46%, Black = 23%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.6"]
[White "Aguilar, Luis Miguel"]
[Black "Melian, Juan Sebastian"]
[Result "1-0"]
[ECO "A16"]
[WhiteElo "2193"]
[BlackElo "1786"]
[Annotator "TA"]
[PlyCount "121"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,121,-26,-7,-62,13,0,6,-27,0,-14,22,21,18,16,11,20,31,9,39,3,55,0,11,11,16,0,162,152,146,162,147,159,157,156,204,197,194,194,187,138,188,160,172,172,189,189,190,196,189,191,198,164,168,164,183,0,118,118,118,118,118,106,106,106,107,106,107,107,107,107,107,103,103,103,187,187,187,187,187,187,489,187,432,187,1750,1673,1567,364,272,0,1360,1306,1380,1184,3807,2537,3022,2160,29976,29971,29970,29969,12839,0,5531,0,29974,29977,29977,29978,29981,29982,29982,29983]} 1. g3 Nf6 2. Bg2 d5 3. c4 c6 4. cxd5 cxd5 5. Nc3 Nc6 6. Nf3 {A16: English Opening: 1...Nf6 with ...d5} ({Better is} 6. d4 $11) (6. d3 e5 7. Bg5 Be6 8. e4 dxe4 9. dxe4 h6 10. Bxf6 Qxf6 11. Nge2 Bc5 12. O-O O-O 13. Nd5 Bxd5 14. exd5 Nd4 {0-1 (30) Schroeter,S (2119)-Olsen,F (2343) Boeblingen 2018}) 6... e6 (6... d4 $15 7. Nb1 e5) 7. O-O Be7 8. a3 {The position is equal.} O-O (8... d4 $5 {[%cal Rd4c3]} 9. Nb1 e5 $15) 9. b4 b6 10. d3 $146 ({Predecessor:} 10. Bb2 Bb7 11. Rc1 Rc8 12. Qb3 Nd7 13. Rfd1 Nce5 14. Nxe5 Nxe5 15. Nxd5 Bxd5 16. Bxd5 Rxc1 17. Rxc1 Qd6 {½-½ (17) Bodrov,E-Rindin,V Chishmy 2010}) 10... Bb7 11. Bb2 Rc8 12. Rc1 Re8 13. Qb3 Bf8 14. Rfd1 d4 (14... h6 $11) 15. Nb1 e5 16. Nbd2 b5 17. Ng5 Rc7 $2 {[#]} (17... Qe7 $11) 18. Nxf7 $1 $18 Rxf7 19. Bxc6 Bxc6 20. Rxc6 Qd7 21. Rdc1 Bd6 22. Ne4 Nxe4 23. dxe4 Bb8 24. Qc2 Bd6 25. Rc8 Rff8 26. Rxe8 Rxe8 27. Qc6 Qxc6 28. Rxc6 {[%mdl 4096] Endgame KRB-KRB} Rd8 29. Kf1 Kf7 30. Ke1 Ke7 31. Ra6 Rd7 32. Rc6 $2 (32. Bc1 $18) 32... Rc7 (32... Rd8 $1 $11 {remains equal.}) 33. Rxc7+ $16 Bxc7 {KB-KB} 34. Bc1 Ke6 35. e3 dxe3 36. Bxe3 a6 37. Ke2 g6 38. Kf3 Bd8 39. Kg4 h5+ 40. Kf3 Be7 41. Ke2 h4 (41... Bd8 $16 42. h3 a5) 42. Kf3 $18 hxg3 43. fxg3 Bd8 44. Kg4 Be7 $2 (44... Kf7 45. Bd2 Bb6) 45. h4 $2 (45. Bg5 {aiming for Bxe7.} Bd6 46. Bd8) 45... Kf7 $2 (45... Bd8 46. Bd2 Kf7) 46. h5 (46. Bg5 $142 {And now Bxe7 would win.} Bd6 47. Bd8) 46... Bf6 $2 (46... Bd8 47. Bc5 Kg7) 47. Bg5 Bg7 48. Bd8 $2 (48. h6 Bf8 $18) (48. Kh4 gxh5 49. Kxh5) 48... Bh6 49. Bg5 $2 (49. Bc7) 49... Bg7 $1 {If only Black now had time for ...Bf8....} 50. Kh4 ({Less strong is} 50. h6 Bf8 $18) 50... Bf8 51. g4 Bg7 52. Bd8 Bh6 53. g5 Bg7 54. Bc7 Bh8 55. Kg4 Bg7 56. Kh4 (56. hxg6+ $142 Kxg6 57. Bd6) 56... Bh8 $1 57. Bd8 (57. hxg6+ $18 Ke7 58. Kg4) 57... Bg7 $1 {[#]} 58. Bf6 $1 {[%mdl 576] Deflection. White mates.} Bxf6 59. gxf6 Kxf6 60. h6 g5+ 61. Kh5 {Accuracy: White = 51%, Black = 48%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.7"]
[White "Heinechen, Juan"]
[Black "Araoz Andrade, Ivan Alexander"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2123"]
[BlackElo "1843"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,77,25,0,17,21,16,0,14,0,33,28,67,54,79,101,93,0,16,0,16,2,50,45,51,47,256,254,261,213,201,197,317,118,248,210,245,258,288,272,276,265,314,320,342,339,321,318,360,306,335,275,299,283,300,297,826,819,772,760,701,558,29984,29985,29990,29991,29998,29999]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nb3 Be6 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} 8. Be3 (8. f4 exf4 9. Bxf4 Nc6 10. Qe2 Be7 11. O-O-O Qc7 12. g4 O-O 13. g5 Nd7 14. Qe3 Rac8 15. Kb1 {1-0 (60) Van Foreest,J (2612)-Nepomniachtchi,I (2763) Wijk aan Zee 2019}) 8... Be7 9. Qf3 Nbd7 {The position is equal.} 10. O-O-O b5 11. g4 b4 12. Nd5 Bxd5 13. exd5 O-O {[#]} 14. Bd3 ({Better is} 14. h4 $1 $16) 14... Nb6 $146 ({Predecessor:} 14... a5 15. Kb1 a4 {½-½ (40) Giron,J (2095)-Gomez Huertas,S (1977) Managua 2014}) 15. Bxb6 Qxb6 16. h4 $36 {[%mdl 2048] White has good play.} Rfe8 (16... a5 $5 {[%cal Ra5a4]}) 17. Nd2 Qa5 $1 {[%cal Ra5a2]} 18. Kb1 {Threatens to win with g5.} Rac8 $2 (18... Qxd5 $14 19. Qxd5 Nxd5) 19. g5 $18 e4 20. Bxe4 Nxe4 21. Nxe4 Rc4 (21... Qc7 {is a better defense.} 22. Rd2 Rf8) 22. Nd2 $2 (22. h5 $18 {aiming for h6.} Qd8 23. Qd3 Rxe4 24. Qxe4 Bxg5 25. Qxb4) 22... Rc7 (22... Rd4 $16) 23. Nb3 Qb6 24. Nd4 a5 25. Nc6 Bf8 26. h5 a4 27. Rh4 b3 28. axb3 axb3 29. cxb3 Qa6 30. Rc4 Rb7 31. Kc2 Qa2 32. Qd3 g6 {With the idea ...Bg7.} 33. h6 Ra8 $2 (33... Qa6 34. f4 Qb5) 34. Re1 {[%cal Bd1e1,Be1e2,Be2e8][%mdl 32]} Qa6 35. Qc3 {Hoping for Ra4.} Qb6 36. Re2 Ra1 {[#]} 37. Rb4 $1 {White mates.} Qa6 {[#]} 38. Re8 $1 {[%csl Gh6][%cal Rc3g7]} f5 {[#]} 39. Qh8+ $1 {[%mdl 576] Decoy, Back Rank. Accuracy: White = 70%, Black = 11%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.8"]
[White "Menacho Admen, Victor Gabriel"]
[Black "Vazquez, Facundo"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1103"]
[BlackElo "2086"]
[Annotator "NA RC"]
[PlyCount "58"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. Nf3 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Bd3 Nbd7 {D00: 1 d4 d5: Unusual lines} (6... c5 7. h3 Nc6 8. O-O cxd4 9. exd4 Nb4 10. Re1 a6 11. Qe2 Re8 12. Be5 Bd7 13. a3 Nxd3 14. cxd3 Rc8 15. Qd2 Bc6 16. b4 {½-½ (16) Brito,L (2346)-Perdomo,L (2466) Pocos de Caldas 2018}) 7. O-O c6 8. Re1 Nh5 9. Be5 $146 ({Predecessor:} 9. Bg3 Nxg3 10. hxg3 e5 11. dxe5 Nxe5 12. Nxe5 Bxe5 13. Qd2 Qa5 14. a3 c5 {½-½ (38) Bilan,D (1894)-Vystavkin,A (2055) Obninsk 2012}) 9... Nxe5 10. Nxe5 Qc7 11. e4 dxe4 12. Bxe4 Rd8 13. Bf3 Nf4 14. h3 Ne6 15. Re4 Bxe5 16. Rxe5 Nxd4 17. Qe1 Nxf3+ 18. gxf3 Bxh3 19. Rxe7 Qf4 20. Qe3 Qxe3 21. fxe3 Rd2 22. Rc1 Rad8 23. Rxb7 $19 (23. Ne4 Rg2+ 24. Kh1) 23... Rg2+ 24. Kf1 Rxc2+ 25. Kg1 Rg2+ 26. Kh1 Rdd2 27. Rxa7 Rh2+ 28. Kg1 Rdg2+ 29. Kf1 Rh1# 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.9"]
[White "Allo Collante, Enrique"]
[Black "Donoso Diaz, Sebastian"]
[Result "0-1"]
[ECO "A37"]
[WhiteElo "1595"]
[BlackElo "2251"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,72,-29,-27,-13,-20,-45,-27,-39,-30,-63,-68,-74,-34,-54,-41,-60,-50,-217,-233,-233,-243,-263,-274,-272,-278,-250,-266,-378,-367,-370,-377,-612,-577,-674,-426,-593,-586,-562,-542,-551,-534,-569,-582,-575,-573,-539,-533,-506,-534,-530,-528,-536,-508,-680,-672]} 1. c4 c5 2. g3 Nc6 3. Nc3 g6 4. Bg2 Bg7 5. Nf3 d6 6. O-O e5 7. d3 Nge7 8. Ne1 Be6 9. Nc2 d5 10. cxd5 Nxd5 11. Ne3 {[%cal Re3d5] A37: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3} Nde7 12. Ne4 (12. Nc4 O-O 13. a4 Rb8 14. a5 h6 15. f4 Kh7 16. fxe5 Nxe5 17. Bf4 Bxc4 18. dxc4 Nxc4 19. Bxb8 Qxb8 {½-½ (40) Cyborowski,L (2543)-Istratescu,A (2651) Legnica 2013}) 12... b6 $1 {[%cal Bb7b6,Bb6b5][%mdl 32]} 13. Ng5 {Black has an edge.} Bd7 14. Nc4 O-O 15. f4 Rb8 $146 ({Predecessor:} 15... h6 16. Nf3 exf4 17. Bxf4 b5 18. Nce5 g5 19. Nxd7 Qxd7 {½-½ (37) Oates,D (2169)-Claridge Hansen,W (1929) High Wycombe 2014}) 16. fxe5 b5 17. Nd6 {[%cal Rg5f7]} Nxe5 18. Nge4 $2 {[#]} ({White should try} 18. Bf4 $15) 18... Be6 $1 $19 19. Be3 f5 20. Bxc5 fxe4 21. Rxf8+ Bxf8 22. Nxe4 Nf5 {[#] Threatens to win with ...Bxc5+.} 23. Bxf8 (23. Kh1 {was called for.}) 23... Qd4+ (23... Kxf8 $2 24. Kh1 $19) (23... Qxf8 $2 24. Qc1 $19) 24. Kh1 Rxf8 25. Rc1 $2 (25. Qe1) 25... Bd5 {Strongly threatening ...Ne3.Black is clearly winning.} 26. h3 Bxe4 27. dxe4 Qxd1+ 28. Rxd1 Nxg3+ 29. Kh2 Nxe2 30. Rd5 Nc4 31. Rxb5 Rf2 {White must now prevent ...Ne3.} 32. Rb3 g5 {And now ...Nd2 would win.} 33. Rf3 Rxf3 34. Bxf3 Nc1 35. Kg3 Kg7 36. Bd1 Nxb2 {Accuracy: White = 33%, Black = 67%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.10"]
[White "Mayeregger, Arnold"]
[Black "Cosme Contreras, Trilce"]
[Result "1-0"]
[ECO "E81"]
[WhiteElo "1913"]
[BlackElo "2051"]
[Annotator "NA RC"]
[PlyCount "59"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 O-O 6. Be3 Nfd7 7. Qd2 {E81: King's Indian: Sämisch: 6th move deviations (including 6 Be3 c6)} c5 8. d5 Qa5 9. h4 (9. Bh6 Bxh6 10. Qxh6 b5 11. h4 bxc4 12. h5 Nf6 13. O-O-O Qb4 14. e5 dxe5 15. d6 e6 16. Nh3 Nbd7 17. Ng5 Rb8 18. Rd2 {1-0 (18) Wang,H (2722)-Zhou,J (2652) Danzhou 2010}) 9... h5 10. Nge2 $146 ({Predecessor:} 10. Bh6 Bxc3 11. bxc3 Rd8 12. g4 Nf6 13. gxh5 Nxh5 14. Ne2 Nd7 {1-0 (38) Tudor,V (1400)-Dumitrescu,F (2084) ICCF email 2009}) 10... Ne5 11. Nc1 a6 12. Be2 Bd7 13. Rg1 b5 14. g4 hxg4 15. fxg4 bxc4 16. h5 Rc8 17. Bh6 Bh8 18. Rh1 Qd8 19. Qf4 Qe8 $2 ({Better is} 19... Bf6 $11) 20. Qh2 (20. hxg6 $18 fxg6 21. Bg5) 20... f6 21. hxg6 Nxg6 (21... Qxg6 $16 {was called for.} 22. Bf4 Bg7) 22. Be3 (22. Bxc4 $18 Qf7 23. Be2) 22... Qf7 23. Bxc4 Qg7 24. Be2 Kf7 25. Nd3 Rg8 26. Qh5 a5 27. Nf4 Na6 28. Ne6 Bxe6 29. dxe6+ Ke8 30. Qd5 $18 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.11"]
[White "Avalos Sanabria, Augusto Alfredo"]
[Black "Gomez Barrera, Gonzalo Andres"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "1474"]
[BlackElo "2058"]
[Annotator "NA RC"]
[PlyCount "80"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. c4 O-O 5. e3 d6 6. h3 Nfd7 7. Nc3 e5 {E61: King's Indian: Early deviations for White, including Smyslov System} 8. Bh2 Re8 (8... exd4 9. exd4 Nc6 10. Be2 Re8 11. O-O Nb6 12. b3 a6 13. Qd2 Bf5 14. Rad1 d5 15. c5 Nc8 16. Qf4 Re7 17. Rfe1 N8a7 18. Bf1 Rxe1 19. Rxe1 {1-0 (31) Ivanchuk,V (2781)-Svidler,P (2738) Moscow 2008}) 9. dxe5 $146 ({Predecessor:} 9. Be2 e4 10. Nd2 f5 11. Qb3 Nf6 12. O-O-O b6 13. g4 Nc6 14. Rdg1 Na5 15. Qc2 {0-1 (48) Akshayraj,K (2300)-Kononenko,D (2449) Denizli 2003}) 9... dxe5 10. Be2 c6 11. Ne4 Qe7 12. Nd6 Rd8 13. Ne4 Nc5 14. Qc2 Bf5 15. Nfd2 Rxd2 16. Qxd2 Nxe4 17. Qa5 b6 18. Qa4 Nc5 19. Qa3 Nd3+ 20. Bxd3 Qxa3 21. bxa3 Bxd3 22. O-O-O e4 23. f3 Na6 24. fxe4 Bxe4 25. Rhg1 Nc5 26. Bd6 Nd3+ 27. Kd2 Rd8 28. Be7 Rd7 29. Bg5 Nf2+ 30. Ke2 Rxd1 31. Kxf2 Rxg1 32. Kxg1 Bf8 33. a4 Bd3 34. Bf6 Bxc4 35. Bc3 Bxa2 36. a5 b5 37. Kf2 b4 38. Bd4 b3 39. Ke2 c5 40. Bb2 Bg7 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.12"]
[Round "3.12"]
[White "Ayala Ruiz, Miguel Angel"]
[Black "Orrego Palermo, Marcelo"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1444"]
[BlackElo "1632"]
[Annotator "NA RC"]
[PlyCount "91"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 a6 6. Bc4 b5 7. Bb3 Bb7 8. O-O e6 9. Bg5 Nbd7 10. Qe2 c5 11. dxc5 Qxc5 12. Rad1 Bd6 13. Bxe6 fxe6 14. Qxe6+ Be7 15. Bxf6 Nxf6 16. Ne5 Rf8 17. Rd7 Bc8 18. Rxe7+ Qxe7 19. Qc6+ Nd7 20. Nxd7 Qxd7 21. Qxa8 Kf7 22. Qd5+ Qxd5 23. Nxd5 Be6 24. Nc7 Bxa2 25. b3 Rc8 26. Nxa6 Rxc2 27. Nb4 Rb2 28. Nxa2 Rxa2 29. Rb1 b4 30. g4 Kf6 31. Kg2 Rc2 32. Re1 Rb2 33. Re3 h6 34. Kg3 Rb1 35. Kf4 Rb2 36. Rf3 Re2 37. Kg3+ Kg6 38. Rf4 h5 39. h3 hxg4 40. hxg4 Rb2 41. Rxb4 Kf6 42. Rf4+ Ke5 43. b4 g6 44. f3 Rb1 45. Re4+ Kf6 46. Kf4 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.1"]
[White "Zambrano Acebo, Jean Junior"]
[Black "Cantero, Rodolfo"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "2174"]
[BlackElo "2059"]
[Annotator "TA"]
[PlyCount "109"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,109,16,22,-19,32,-70,-73,-67,-74,-66,-7,0,0,0,0,-11,0,0,-13,-19,-7,-20,-12,-1,0,0,0,0,0,0,0,0,0,0,9,8,18,-32,-32,-32,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,35,29,44,35,37,33,36,18,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. Qe2 {C45: Scotch Game} (6. e5 Qe7 7. Qe2 Nd5 8. c4 Nb6 9. Nc3 a5 10. Bd2 g6 11. Ne4 Bg7 12. Nf6+ Kd8 13. O-O-O Ba6 14. Qg4 Kc8 15. Bxa5 h5 16. Qg3 h4 17. Qg4 Qxe5 {½-½ (38) Radjabov,T (2756)-Topalov,V (2740) Shamkir 2019}) 6... d5 (6... Rb8 $11) 7. Bg5 (7. exd5+ $14 Be7 8. dxc6) 7... Be7 $15 8. Bxf6 $146 {Black is better.} ({Predecessor:} 8. Nd2 O-O 9. O-O-O Rb8 10. f3 Re8 11. Nb3 h6 12. Be3 Bd6 13. Bxa7 Ra8 {0-1 (27) Kantans,T (2509)-Kjartansson,G (2428) Batumi 2018}) 8... Bxf6 9. exd5+ Qe7 (9... Kf8 $15 10. Nc3 cxd5) 10. Nc3 Bxc3+ 11. bxc3 cxd5 12. Qxe7+ Kxe7 13. O-O-O Be6 14. Bb5 c5 15. Rhe1 Rad8 16. f4 g6 17. Bc6 d4 18. cxd4 cxd4 19. Re5 Rd6 20. Ba4 Kf6 21. Bb3 Bf5 22. Ra5 a6 23. Bc4 Rc8 24. Bd3 Bg4 (24... Bxd3 $15 25. Rxd3 Rdc6) 25. Re1 Be6 26. Ree5 Bc4 {[#] Hoping for ...Bxd3.} 27. Bxc4 Rxc4 $11 {[%mdl 4096] Endgame KRR-KRR} 28. Rec5 Rb4 29. a3 Rbb6 30. Rd5 Re6 31. Rxd4 Re2 32. Rg5 Rc6 33. Rd2 Re1+ 34. Kb2 Rb6+ 35. Ka2 Reb1 {[%csl Gb1][%cal Rb6b2] [#]} 36. c4 Rc1 {The position is equal.} 37. c5 Rb5 38. Rb2 Rbxc5 39. Rb6+ Rc6 40. Rxc6+ Rxc6 {KR-KR} 41. Kb3 h6 42. Rd5 Re6 43. g3 Re2 44. Rd6+ Kf5 45. Rxa6 Rxh2 46. Rc6 Kg4 47. Rc3 g5 48. fxg5 hxg5 49. a4 {[%cal Ba3a4,Ba4a5,Ba5a6][%mdl 32]} f5 50. a5 f4 51. gxf4 gxf4 52. a6 f3 {And now ...f2 would win.} 53. Kb4 Rb2+ 54. Ka5 f2 55. Rc1 {Accuracy: White = 76%, Black = 67%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.2"]
[White "Zapata Charles, Santiago"]
[Black "Estrada Lavin, Cristian Alexand"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "2322"]
[BlackElo "2116"]
[Annotator "TA"]
[PlyCount "49"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,49,7,6,0,47,28,34,33,26,26,40,37,47,50,74,42,58,43,77,73,64,58,98,52,112,110,155,124,117,125,125,104,173,175,230,228,224,230,206,193,220,239]} 1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. Bd3 Nc6 5. Bc2 (5. O-O d5 6. e5 Nd7 7. Bb5 a6 8. Bxc6 bxc6 9. d3 Be7 10. Re1 O-O 11. c4 f6 12. exf6 Bxf6 13. Nc3 {1-0 (37) Rapport,R (2715)-Lenderman,A (2600) Reykjavik 2018}) 5... Be7 6. O-O {B40: Sicilian: 2...e6, Unusual lines} e5 7. Re1 O-O 8. h3 {White is slightly better.} d6 9. d4 cxd4 10. cxd4 Qb6 $146 {[%cal Re5d4]} ({Predecessor:} 10... Bd7 11. Nc3 Rc8 12. Be3 a6 13. Qe2 Re8 14. Rad1 Qc7 15. Bb1 Na5 16. Bg5 Be6 17. dxe5 dxe5 18. Nd5 Bxd5 19. exd5 Nc4 20. Rc1 e4 21. Nd2 b5 22. b3 {1-0 (22) Nurkic,S (2372)-Radic,B (2179) Tuzla 2015}) 11. d5 Nb8 12. Nbd2 Nbd7 13. b3 Re8 14. Nc4 Qc7 15. a4 Bf8 16. Ba3 Rb8 ({Black should play} 16... b6 $14) 17. Rc1 $16 a5 18. Bb1 {And now Nxd6 would win.} Nc5 19. Bxc5 $1 Qxc5 20. Ncxe5 Qa7 (20... Qb4 $16 {might work better.}) 21. Nc4 $36 {[%mdl 2048] White is clearly better. White has strong initiative.} b5 (21... Bd7 {was worth a try.} 22. Qd4 b6) 22. axb5 Rxb5 23. Nd4 Rc5 24. Nc6 Qc7 {[#]} 25. Qd2 $1 {Accuracy: White = 67%, Black = 41%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.3"]
[White "Munoz, Francisco Javier"]
[Black "Aguilar, Luis Miguel"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2308"]
[BlackElo "2193"]
[Annotator "TA"]
[PlyCount "147"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,147,49,49,15,51,51,52,44,81,78,73,53,53,46,59,45,46,30,75,73,68,33,73,57,55,2,47,39,60,42,123,78,81,62,77,14,178,178,190,190,185,154,160,161,178,165,184,184,184,184,184,183,190,190,190,190,190,190,190,178,190,190,186,183,183,176,239,176,186,186,195,183,186,186,207,207,289,207,310,368,662,647,672,658,635,633,691,660,687,700,699,692,676,676,676,380,188,0,699,693,683,691,669,632,2006,1564,2001,1955,1360,882,842,842,977,0,1535,789,874,780,779,624,1632,1675,1658,1623,2614,2596,2802,2613,3764,3684,29977,29978]} 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 Be7 6. a4 c6 7. O-O O-O 8. h3 Qc7 9. Re1 h6 10. a5 {[%cal Ba4a5,Ba5a6][%mdl 32] C41: Philidor Defence} Rd8 (10... Re8 11. Be3 Nf8 12. Bb3 Be6 13. Ba4 Red8 14. Qd3 Ng6 15. b4 d5 16. exd5 Nxd5 17. Nxd5 Bxd5 {1-0 (30) Guseinov,G (2664)-Maslak,K (2555) St Petersburg 2018}) 11. Be3 Nf8 12. d5 {White is slightly better.} c5 13. a6 $146 ({Predecessor:} 13. Bf1 Bd7 14. Nd2 Ng6 15. g3 Qc8 {1-0 (39) Gavric,M (2365)-Pavlovic,R Kladovo 1991}) 13... b6 14. Bb5 Bd7 {next ...Nxe4 is good for Black.} 15. Qd3 Ng6 16. Bxd7 Qxd7 17. Nd2 Nh5 18. Qb5 Qc8 19. Nc4 Nf6 20. Red1 Ne8 21. Kh2 (21. b4 $14) 21... Rb8 22. Qa4 Nf8 23. g3 Bf6 (23... Nh7 $14) 24. Nb5 Qd7 25. c3 Be7 26. f4 (26. f3 $16) 26... f6 $2 (26... exf4 $11 {and Black has nothing to worry.} 27. gxf4 (27. Bxf4 Ng6 $14) 27... Nf6) 27. f5 $18 Rdc8 28. Qb3 Ra8 29. g4 Nc7 30. Nxc7 Rxc7 31. Na3 Rcc8 32. Kg3 Qe8 33. c4 Nh7 34. h4 Kf7 35. Kf3 Qd7 36. Rg1 Rg8 37. Rg2 Rh8 38. Qb5 Qc7 39. Rag1 Qc8 40. Nb1 Qe8 41. Nc3 Rg8 (41... Qxb5 $142 42. Nxb5 (42. cxb5 Bd8 $16) 42... Rhc8) 42. Ke2 Rd8 43. Qb3 Qd7 44. Kd3 Qc8 45. Qa4 Qd7 46. Nb5 Ra8 47. Bd2 Rab8 (47... Kf8 $142 48. Qd1 Rh8) 48. Qd1 Ra8 $2 {[#]} (48... Rh8 49. Rh1 Kg8) 49. g5 $1 {[%mdl 512]} fxg5 50. Qh5+ Kf8 51. Qg6 Rh8 52. hxg5 Nxg5 {Now ...Bf6 and Black clings on.} 53. Rh1 {[%cal Rd2g5]} (53. Bxg5 hxg5 54. f6 Bxf6 $11) 53... Rg8 {[#]} 54. Rxh6 $1 {[%mdl 576] Demolition} gxh6 55. Qxh6+ Kf7 56. Qh5+ ({Weaker is} 56. Rxg5 Bxg5 57. Bxg5 Rxg5 $18) 56... Kf8 {intending ...Qd8.} 57. Qh6+ $2 (57. Bxg5 Bxg5 58. Rxg5 Rxg5 59. Qxg5) 57... Kf7 $1 58. Bxg5 Bxg5 59. Rxg5 Rxg5 60. Qxg5 {[%mdl 4096] Endgame Black must now prevent Qg6+. KQR-KQN} Rf8 61. Qg6+ Ke7 62. Qg7+ Rf7 63. Qg8 Rf8 64. Qg6 Rf6 65. Qg7+ (65. Qh7+ $142 Ke8 66. Nc7+ Kd8 67. Ne6+ Rxe6 68. Qxd7+ Kxd7 69. dxe6+ Ke7 70. Kc3) 65... Rf7 66. Qg5+ Ke8 67. Qg6 Ke7 68. Qe6+ Qxe6 69. dxe6 {KR-KN} Rh7 70. Nxa7 Rh1 71. Nc8+ Kf6 72. a7 Ra1 73. e7 Kf7 74. f6 {Accuracy: White = 57%, Black = 34%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.4"]
[White "Heinechen, Juan"]
[Black "Suarez, Pedro"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2123"]
[BlackElo "2077"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,61,7,9,-9,5,0,3,0,0,-43,-9,-33,-38,-27,-30,-19,0,-28,-23,-40,-3,-14,15,27,31,21,45,50,153,164,170,154,177,134,248,239,330,372,448,452,424,414,1284,1231,1426,1408,1500,553,615,629,752,759,1114,1093]} 1. e4 e6 2. Qe2 c5 3. g3 Nc6 4. c3 Nf6 5. Bg2 Be7 6. Nf3 {C00: French: Unusual White 2nd moves} O-O 7. O-O d5 8. e5 {The position is equal.} Nd7 9. d3 (9. d4 a5 10. Rd1 a4 11. h4 b5 12. Ng5 b4 13. a3 bxc3 14. bxc3 {1-0 (47) Kobalia,M (2620)-Morozevich,A (2656) Tula 2019}) 9... a6 10. h4 b5 11. Bf4 Bb7 $146 ({Predecessor:} 11... Qb6 12. Nbd2 Rb8 13. h5 Rd8 14. Rfd1 Nf8 15. Rab1 c4 16. dxc4 bxc4 {½-½ (77) Ivanova,T (2112)-Smyshliaeva,L (1725) Irkutsk 2010}) 12. Nbd2 Nb6 13. Ng5 h6 14. Nh3 Qe8 15. Nf3 Rd8 16. d4 cxd4 17. cxd4 Rd7 18. Rad1 f6 (18... Bd8 $14) 19. exf6 $16 Bxf6 20. Rfe1 Kh8 21. g4 ({Don't do} 21. Qxe6 $6 Re7 $14) 21... Qg6 (21... Rdf7 $16) 22. g5 $18 hxg5 23. hxg5 Be7 24. Nh4 Qh7 25. Qg4 Nd8 (25... Bc8 $142 26. Bg3 Rdd8) 26. Bf1 {White is clearly winning.} g6 27. Bd3 Rf5 {[#]} 28. Bxf5 (28. Rxe6 $142 $3 {[%mdl 512]} Nxe6 {[#]} 29. Nxg6+ $1 {[%mdl 512]} Kg8 30. Bxf5) 28... exf5 29. Qg3 Nc4 30. b3 Nd6 {[#]} 31. Rxe7 $1 {[%mdl 512] Accuracy: White = 44%, Black = 24%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.5"]
[White "Vazquez, Facundo"]
[Black "Benitez Galeano, Alejandro"]
[Result "1/2-1/2"]
[ECO "E69"]
[WhiteElo "2086"]
[BlackElo "2052"]
[Annotator "NA RC"]
[PlyCount "105"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 21,105,14,31,32767,52,37,53,54,73,70,66,78,93,32767,32767,32767,85,103,101,32767,119,96,132,129,131,138,124,109,115,67,68,-32,-24,-28,-20,-62,-60,-67,32767,-111,-76,-93,-106,-104,32767,-121,-78,-250,-248,-239,-181,32767,-23,-39,68,90,282,24,27,0,25,26,14,-27,32767,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 {[%emt 0:00:30]} Nf6 {[%emt 0:08:30]} 2. c4 {[%emt 0:00:30]} g6 {[%emt 0:01:30]} 3. g3 {[%emt 0:00:30]} Bg7 {[%emt 0:00:30]} 4. Bg2 {[%emt 0:00:30]} O-O {[%emt 0:00:30]} 5. Nc3 {[%emt 0:00:30]} d6 {[%emt 0:00:30]} 6. Nf3 {[%emt 0:00:30]} Nbd7 {[%emt 0:00:30]} 7. O-O {[%emt 0:00:30]} e5 {[%emt 0:00:30]} 8. e4 {[%emt 0:00:30]} exd4 {[%emt 0:00:30]} 9. Nxd4 {[%emt 0:00:30]} Re8 {[%emt 0:00:30]} 10. h3 {[%emt 0:00:30]} Nc5 {[%emt 0:01:30]} 11. Re1 {[%emt 0:00:30]} c6 {[%emt 0:04:30]} 12. Qc2 {[%emt 0:03:30]} a5 {[%emt 0:02:30]} 13. Be3 {[%emt 0:01:30]} Qc7 {[%emt 0:05:30]} 14. Rad1 {[%emt 0:02:30]} Be6 {[%emt 0:02:30]} 15. b3 {[%emt 0:12:30]} Rad8 {[%emt 0:02:30]} 16. a3 {[%emt 0:02:30]} Qe7 {[%emt 0:16:30]} 17. f4 {[%emt 0:04:30]} Bc8 {[%emt 0:05:30]} 18. Bf2 {[%emt 0:01:30] E69: King's Indian: Fianchetto: 6...Nbd7 7 0-0 e5 8 e4 c6 9 h3} h5 $146 {[%emt 0:02:30]} ({Predecessor:} 18... Nfd7 19. Re2 Qf6 20. Red2 h5 21. Nde2 Bf8 22. b4 {½-½ (24) Neckar,L (2425)-Pekarek,A (2335) Prague 1983}) 19. b4 {[%emt 0:07:30]} axb4 {[%emt 0:00:30]} 20. axb4 {[%emt 0:00:30]} Ne6 {[%emt 0:01:30]} 21. Nf3 {[%emt 0:09:30]} Nd7 {[%emt 0:01:30]} 22. Nd5 {[%emt 0:08:30]} Qf8 {[%emt 0:02:30]} 23. Nb6 {[%emt 0:04:30]} Qe7 {[%emt 0:02:30]} 24. Nxc8 {[%emt 0:01:30]} Rxc8 {[%emt 0:00:00]} 25. Qd2 {[%emt 0:00:30]} Rcd8 {[%emt 0:03:00]} 26. g4 {[%emt 0:02:30]} (26. b5 $16) 26... hxg4 {[%emt 0:02:30]} 27. hxg4 {[%emt 0:00:30]} g5 $1 {[%emt 0:01:30]} 28. Nxg5 {[%emt 0:09:30]} Nxg5 {[%emt 0:00:30]} 29. fxg5 {[%emt 0:00:00]} Ne5 {[%emt 0:00:30]} 30. Bh4 {[%emt 0:02:00]} Rd7 {[%emt 0:04:30]} ({Worse is} 30... Nxg4 31. Qf4 $16) 31. Qe2 {[%emt 0:04:30]} Ra8 {[%emt 0:03:30]} 32. Kh1 {[%emt 0:04:44]} Ng6 {[%emt 0:04:30]} 33. Qf2 {[%emt 0:02:58]} Qe6 {[%emt 0:00:30]} 34. Bf3 $2 {[%emt 0:01:44]} (34. Bg3 $17) 34... Qxc4 {[%emt 0:01:01]} 35. Bg3 {[%emt 0:00:58]} Qxb4 {[%emt 0:01:27]} 36. e5 {[%emt 0:00:13]} Re8 {[%emt 0:06:43]} (36... d5 $19 37. e6 Re7) 37. exd6 {[%emt 0:01:28]} Red8 {[%emt 0:01:07]} ({Black should try} 37... Be5 $1 $15) 38. Be4 {[%emt 0:01:27]} Ne5 $2 {[%emt 0:03:35] [#]} (38... Be5 $16) 39. Rb1 $2 {[%emt 0:03:18]} (39. Qh2 $1 $18 Ng6 40. Bf5) 39... Qxd6 {[%emt 0:00:46]} 40. Qh2 {[%emt 0:00:26]} Re8 {[%emt 0:01:40]} 41. Qh7+ {[%emt 0:02:21]} Kf8 {[%emt 0:00:01]} 42. g6 {[%emt 0:00:38]} Qc5 43. Rf1 {[%emt 0:01:07]} Qe3 44. gxf7 Nxf7 45. Rxf7+ Rxf7 46. Bd6+ {[#]} Ree7 $1 47. Bxe7+ Rxe7 48. Qf5+ Kg8 49. Qh7+ Kf7 50. Qg6+ Kg8 51. Qh7+ Kf8 52. Qf5+ $1 Kg8 $11 53. Qh7+ 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.6"]
[White "Donoso Diaz, Sebastian"]
[Black "Mayeregger, Arnold"]
[Result "1-0"]
[ECO "E16"]
[WhiteElo "2251"]
[BlackElo "1913"]
[Annotator "ChessBase"]
[PlyCount "91"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 c5 5. g3 b6 6. Bxb4 cxb4 7. Bg2 Bb7 8. O-O O-O 9. a3 bxa3 10. Nxa3 d6 11. Nb5 a6 12. Nc3 Nbd7 13. d5 e5 14. Nd2 Ne8 15. e4 a5 16. Bh3 Nc5 17. Qe2 Bc8 18. Bxc8 Qxc8 19. f4 f6 20. Nb5 Qd8 21. b4 axb4 22. Na7 Nc7 23. Nc6 Qd7 24. Nxb4 Rxa1 25. Rxa1 Ra8 26. Rxa8+ Nxa8 27. Nc6 Nc7 28. Nb1 g6 29. fxe5 fxe5 30. Nc3 N7a6 31. Qb2 Nd3 32. Qxb6 Nac5 33. Qb8+ Kg7 34. Nd8 Qe7 35. Nd1 Nc1 36. Nf2 Ne2+ 37. Kg2 Nd4 38. Nc6 Nxc6 39. dxc6 Ne6 40. Qb7 Kf8 41. h4 Ke8 42. Qc8+ Kf7 43. Ng4 Qc7 44. Qb7 Ke8 45. Ne3 Kd8 46. Nd5 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.7"]
[White "Gimenez Aguirre, Alejo Ismael"]
[Black "Allo Collante, Enrique"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2247"]
[BlackElo "1595"]
[Annotator "RC"]
[PlyCount "49"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Ne2 e6 5. c3 Nd7 6. Nf4 h6 7. Nd2 Ne7 8. b4 a5 9. a3 Nc8 10. Bb2 Ndb6 11. Rc1 axb4 12. cxb4 Na4 13. Ba1 Be7 14. Nb3 Bg5 15. Qd2 Na7 16. Na5 Qe7 17. h4 Bxf4 18. Qxf4 Rc8 19. g4 Bg6 20. Rh3 f6 21. h5 Bh7 22. exf6 gxf6 23. Qxh6 b6 24. Nxc6 Nxc6 25. Rxc6 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.8"]
[White "Araoz Andrade, Ivan Alexander"]
[Black "Coro, Lucas"]
[Result "0-1"]
[ECO "B31"]
[WhiteElo "1843"]
[BlackElo "2315"]
[Annotator "TA"]
[PlyCount "92"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,106,16,18,14,11,18,18,18,16,16,15,18,17,20,19,16,12,12,25,15,32,0,0,-46,-54,-45,-30,-46,-44,-41,-49,-116,-79,-101,-80,-89,-85,-116,-40,-51,-14,-6,-25,-83,-56,-52,-42,-76,-58,-62,-34,-39,-47,-62,-27,-33,-45,-54,-67,-191,-175,-191,-179,-179,-162,-195,-195,-195,-195,-299,-195,-200,-193,-196,-175,-341,-263,-1415,-307,-285,0,-1454,-1435,-29987,-29988,-29990,-29991,-29994,-29995,-29995,-29996,-29996,-29995,-29995,-29996,-29998,-29998,-29998,-29999]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Nc3 e5 6. a3 {B31: Sicilian: 2...Nc6 3 Bb5 g6} Nge7 7. b4 d6 8. bxc5 {The position is equal.} dxc5 9. d3 O-O 10. Bc4 h6 11. h3 $146 ({Predecessor:} 11. Re1 Kh7 12. Nd5 Be6 13. Nxe7 Qxe7 14. Bd5 Nd4 {1-0 (41) Karjakin,S (2767)-Radjabov,T (2745) Stavanger 2013}) 11... Bd7 12. Re1 Rc8 13. a4 Kh7 14. Rb1 b6 15. Bb2 Na5 16. Nb5 Nxc4 17. dxc4 Nc6 $1 18. Nc3 Nd4 19. Ra1 f5 20. Nh2 (20. Nd2 $15) 20... Bc6 21. f3 Rf7 22. Nd5 Rb8 23. Qd2 f4 (23... Qd7 $17 24. Bxd4 cxd4) 24. Reb1 Rfb7 (24... h5 {looks sharper.} 25. Qd1 Qd7 26. c3 Ne6 27. a5 b5) 25. Bxd4 cxd4 26. Nb4 (26. Ng4 $11 {remains equal.}) 26... Be8 27. Nf1 Bf8 28. Nd5 g5 29. g4 Bc5 30. Kg2 a5 31. Qd3 Kg7 32. Nd2 Bc6 33. Kh2 Qd7 34. Qb3 {[#]} (34. Nb3 $15) 34... h5 $1 {[%mdl 512]} 35. Kg2 (35. gxh5 Rh8) 35... Rh8 36. Rh1 Rbb8 37. Qa2 Rh6 38. Qb3 Kg6 39. Kf1 (39. Qd3 {was necessary.}) 39... Qd6 ({Less strong is} 39... hxg4 40. fxg4 Rbh8 41. Nf3 $17) 40. Kg2 Bd7 41. Qd3 Rbh8 42. Qb3 $2 (42. Nb3) 42... Kf7 43. Qa2 $2 (43. Qd3) 43... Be6 $2 (43... hxg4 {[%cal Rh6h3]} 44. Kf1 gxf3) 44. Qb3 $19 Bd7 $2 (44... Kg7 45. Qd3 Bd7) 45. Qa2 $1 hxg4 46. hxg4 {[#]} Rxh1 {Played: Bd7xg4} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.8"]
[White "Araoz Andrade, Ivan Alexander"]
[Black "Coro, Lucas"]
[Result "*"]
[ECO "B31"]
[WhiteElo "1843"]
[BlackElo "2315"]
[Annotator "TA"]
[PlyCount "24"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,24,16,21,15,17,11,11,9,10,10,10,10,22,16,25,8,59]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Nc3 e5 6. a3 {B31: Sicilian: 2...Nc6 3 Bb5 g6} Nge7 7. b4 d6 8. bxc5 dxc5 9. d3 O-O 10. Bc4 h6 11. h3 $146 ({Predecessor:} 11. Re1 Kh7 12. Nd5 Be6 13. Nxe7 Qxe7 14. Bd5 Nd4 {1-0 (41) Karjakin,S (2767)-Radjabov,T (2745) Stavanger 2013}) 11... Bd7 12. Re1 Re8 (12... b6 $11) *

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.9"]
[White "Cadilhac, Igor Tokuichi Kikuc"]
[Black "Ayala Ruiz, Miguel Angel"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "2288"]
[BlackElo "1444"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,118,181,187,8,18,-31,90,97,97,97,88,93,95,89,95,97,89,63,67,61,59,70,93,83,91,66,194,175,175,175,199,181,199,200,184,128,138,138,142,99,97,51,51,51,51,51,56,56,56,56,56,53,56,56,56,42,56,56,66,40,53,53,53,0,53,53,68,68,68,68,68,68,68,68,68,0,68,68,68,68,68,68,68,0,68,0,68,0,30,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,0,0,0,0]} 1. e4 Nf6 2. Nc3 e6 3. d4 Bb4 4. e5 Ne4 (4... Nd5 5. Qg4 Kf8 6. a3 Bxc3+ 7. bxc3 c5 8. Bd2 Nc6 9. Nf3 d6 10. Bb5 dxe5 11. dxe5 Qc7 12. Qh5 {0-1 (37) Shirazi,K (2455)-Delchev,A (2591) Metz 2002}) 5. Qg4 Nxc3 6. a3 $2 {A45: Trompowsky Attack} (6. Qxg7 $18 Rf8 7. a3 Na2+ 8. axb4 Nxc1 9. Rxc1) 6... Bf8 $1 $11 {Threatens to win with ...Nd5.} 7. Bg5 Be7 $146 (7... h5 $1 $15 {keeps the upper hand.} 8. Qh4 Be7 9. Bxe7 Qxe7 10. Qxe7+ Kxe7 11. bxc3 b6) ({Predecessor:} 7... f6 8. exf6 h5 9. f7+ Kxf7 10. Qf4+ Qf6 11. Bxf6 gxf6 12. bxc3 d6 13. Bc4 Nd7 14. Nh3 Bh6 15. Qf3 Ke7 16. O-O Nb6 17. Bb3 h4 18. Rfe1 Bd7 19. Bxe6 {1-0 (19) Gal,P (2109)-Hoflinger,I (2036) Hungary 2009}) 8. Bxe7 $16 {[%mdl 64] [#] Discovered Attack. White is better.} Qxe7 9. Qxg7 Qf8 10. Qxf8+ Rxf8 11. bxc3 b6 12. Bd3 Bb7 13. Nf3 Rg8 14. Bxh7 Rxg2 15. Ke2 Rg7 16. Bd3 Ke7 17. h4 Nc6 ({Black should try} 17... d6 $1 $14) 18. h5 $18 Rh8 19. h6 Rg4 20. h7 f5 21. exf6+ $1 Kxf6 22. Rag1 (22. Rad1 $18) 22... Rxg1 $16 23. Rxg1 Ne7 24. Nh4 Nf5 25. Nxf5 exf5 {[%mdl 4096] Endgame KRB-KRB} 26. Rg8 Rxh7 27. Rf8+ Rf7 28. Rxf7+ Kxf7 29. Bxf5 $14 {KB-KB} d6 30. Ke3 Kf6 31. Be4 Bc8 32. Kd3 Be6 33. c4 c5 34. c3 Bd7 35. Ke3 Be6 36. Bd5 (36. Bd3 $14) 36... Bf5 (36... Bxd5 $1 $11 37. cxd5 c4) 37. Kf4 a6 38. Bb7 a5 39. Ke3 Be6 40. Kd3 Bf5+ 41. Kd2 Be6 42. Kd3 Bf5+ $1 43. Be4 Be6 44. Bd5 {[#] And now Bxe6 would win.} Bf5+ 45. Kd2 Bd7 46. Bb7 Be6 $1 47. Bd5 Bd7 48. Kc1 (48. Ke3 $14) 48... Ba4 49. Kb2 Kg5 {The position is equal.} 50. Kc1 Kf4 51. Kd2 Bb3 52. Kd3 Ba4 53. Bb7 Bd7 54. Kc2 Bg4 55. Bd5 Bf5+ 56. Kb3 Bd7 57. Bb7 Kg5 58. d5 Kf4 59. Bc6 Bc8 $1 {Accuracy: White = 36%, Black = 65%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.10"]
[White "Gomez Barrera, Gonzalo Andres"]
[Black "Menacho Admen, Victor Gabriel"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "2058"]
[BlackElo "1103"]
[Annotator "NA RC"]
[PlyCount "29"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 e5 2. Bc4 Nc6 3. Nf3 d6 4. d4 Bg4 5. h3 Bh5 6. d5 Bxf3 7. Qxf3 Nd4 8. Qd3 a6 9. c3 $18 b5 10. cxd4 bxc4 11. Qxc4 g6 12. dxe5 dxe5 13. Qc6+ Ke7 14. Bg5+ f6 15. Qe6# 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.11"]
[White "Melian, Juan Sebastian"]
[Black "Cosme Contreras, Trilce"]
[Result "*"]
[ECO "A48"]
[WhiteElo "1786"]
[BlackElo "2051"]
[Annotator "NA RC"]
[PlyCount "23"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 O-O 5. c3 d6 6. e4 c5 7. dxc5 dxc5 8. Bc4 Nc6 9. Qe2 Qc7 10. O-O Rb8 11. a4 a6 $14 (11... b6 $11) 12. Rfe1 *

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.11"]
[White "Melian, Juan Sebastian"]
[Black "Cosme Contreras, Trilce"]
[Result "1-0"]
[ECO "A48"]
[WhiteElo "1786"]
[BlackElo "2051"]
[Annotator "NA RC"]
[PlyCount "39"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 O-O 5. c3 d6 6. e4 c5 7. dxc5 dxc5 8. Bc4 Nc6 9. Qc2 Qc7 10. O-O Rb8 11. a4 a6 12. Rfe1 b5 13. axb5 axb5 14. Bf1 e5 15. Be3 Nd7 16. Nb3 Nd8 17. c4 $11 b4 $1 18. Bd3 h6 19. Nfd2 Ne6 20. f3 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.13"]
[Round "4.12"]
[White "Orrego Palermo, Marcelo"]
[Black "Avalos Sanabria, Augusto Alfredo"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "1632"]
[BlackElo "1474"]
[Annotator "NA RC"]
[PlyCount "40"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4 Nf6 5. Nc3 Bf5 6. e3 e6 7. Qb3 b6 8. Nb5 Na6 9. Qa4 Nb4 10. Nd6+ Ke7 11. Qxb4 Kd7 12. Bb5+ Kc7 13. Rc1+ Kb8 14. Nxf7+ Kb7 15. Nxd8+ Rxd8 16. Bc6+ Kc8 17. Bb5+ Kb7 18. Rc7+ Ka8 19. Bc6+ Kb8 20. Re7+ Kc8 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.1"]
[White "Zambrano Acebo, Jean Junior"]
[Black "Munoz, Francisco Javier"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2174"]
[BlackElo "2308"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,61,22,26,44,36,35,4,18,7,8,3,22,36,16,0,62,-9,43,30,143,122,122,129,281,279,393,388,408,387,424,311,290,280,283,265,596,589,555,466,5895,5257,5385,5257,5002,1507,1163,531,476,144]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. Ne5 c6 7. Bd3 Bxd3 8. Qxd3 e6 {B01: Scandinavian Defence} 9. O-O Nbd7 10. Nc4 (10. Qg3 Qc7 11. Re1 Nb6 12. Qf3 Bb4 13. Bh6 gxh6 14. Qxf6 Rf8 15. a3 Bxc3 16. bxc3 {½-½ (80) Dominguez Perez,L (2723)-Nakamura,H (2775) Thessaloniki 2013}) 10... Qc7 {The position is equal.} 11. Bg5 b5 $146 ({Predecessor:} 11... Be7 12. Bh4 b5 13. Nd2 O-O 14. Bg3 Qb7 15. Rfe1 Rfd8 16. Rad1 Qb6 {½-½ (25) Weidemann,U-Pink,F DESC email 2001}) 12. Ne5 Bd6 13. f4 $36 {[%mdl 2048] White fights for an advantage.} O-O 14. Rae1 a6 ({Black should play} 14... h6 $11 15. Bh4 Rab8) 15. Qg3 ({Better is} 15. Rf3 $14) 15... g6 (15... Rfe8 $11) 16. Qh4 c5 (16... b4 $1 $11 {remains equal.}) 17. Nxd7 (17. Bxf6 Nxf6 18. d5 (18. Qxf6 Be7 $15) 18... Bxe5 $11) 17... Nxd7 {[#]} 18. d5 $1 b4 $2 {[#]} (18... Rfe8 $16) 19. Ne4 $1 $18 ({Weaker is} 19. dxe6 fxe6 20. Ne4 Qc6 $16) 19... Rfe8 ({Don't play} 19... exd5 $6 20. Nxd6 Qxd6 21. Be7 $16) (19... c4 $142 20. Kh1 exd5 21. Nxd6 Qxd6) 20. dxe6 Rxe6 21. f5 gxf5 22. Nf6+ Nxf6 23. Bxf6 Bxh2+ 24. Kh1 {Strongly threatening Qg5+.} Rxf6 $2 (24... Qg3 {is tougher.}) 25. Qxf6 {White is clearly winning.} Qd6 26. Qxf5 Bg3 (26... Kh8 $142 27. Qxf7 Be5) 27. Qxf7+ Kh8 28. Re8+ Rxe8 29. Qxe8+ Kg7 30. Qf7+ (30. Rf7+ $142 Kh6 31. Rd7) 30... Kh8 {( -> ...Qh6+)} 31. Qf8+ {Accuracy: White = 64%, Black = 18%.} ({Not} 31. Qe8+ Kg7) 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.2"]
[White "Zapata Charles, Santiago"]
[Black "Heinechen, Juan"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2322"]
[BlackElo "2123"]
[Annotator "NA"]
[PlyCount "47"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 9,44,10,32767,32767,32767,22,32767,16,22,19,19,32767,32767,0,32767,32767,32767,32767,34,40,64,70,59,32767,93,32767,32767,32767,32767,32767,351,337,32767,32767,856,914,801]} 1. e4 {[%emt 0:01:30]} e5 {[%emt 0:00:30]} 2. Bc4 {[%emt 0:00:30]} Nf6 {[%emt 0:00:30]} 3. d3 {[%emt 0:00:30]} Bc5 {[%emt 0:00:00]} 4. Nf3 {[%emt 0:00:00]} Nc6 {[%emt 0:00:00]} 5. O-O {[%emt 0:00:00]} O-O {[%emt 0:00:30]} 6. Nbd2 {[%emt 0:02:30]} a6 {[%emt 0:02:30]} 7. Bb3 {[%emt 0:02:30]} d6 {[%emt 0:01:30]} 8. c3 {[%emt 0:00:30]} Ba7 {[%emt 0:01:30]} 9. h3 {[%emt 0:00:30]} (9. Re1) 9... h6 {[%emt 0:00:30]} 10. Re1 {[%emt 0:00:30]} Be6 {[%emt 0:00:30]} 11. Bc2 {[%emt 0:00:30]} Ne7 {[%emt 0:16:30]} 12. Nf1 {[%emt 0:01:30]} Ng6 {[%emt 0:01:30]} 13. d4 {[%emt 0:01:30]} c6 {[%emt 0:10:30]} 14. Ng3 {[%emt 0:00:30]} Qc7 {[%emt 0:02:30]} 15. Be3 {[%emt 0:00:30]} Rfe8 16. Qc1 b5 17. Nf5 Bxf5 18. exf5 Nf8 19. Bxh6 gxh6 $2 (19... N8h7 $16) 20. Qxh6 N8h7 21. Ng5 exd4 $2 (21... d5 22. Nxh7 Nxh7) 22. Nxh7 $18 Nxh7 23. f6 Nxf6 24. Qg5+ 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.3"]
[White "Cantero, Rodolfo"]
[Black "Vazquez, Facundo"]
[Result "1-0"]
[ECO "A26"]
[WhiteElo "2059"]
[BlackElo "2086"]
[Annotator "NA RC"]
[PlyCount "87"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. g3 {[%emt 0:00:30]} Nf6 {[%emt 0:00:30]} 2. Bg2 {[%emt 0:00:00]} g6 {[%emt 0:00:00]} 3. c4 {[%emt 0:00:00]} Bg7 {[%emt 0:00:00]} 4. Nc3 {[%emt 0:00:30]} O-O {[%emt 0:00:30]} 5. d3 {[%emt 0:00:00]} e5 {[%emt 0:00:30]} 6. e4 {[%emt 0:00:00]} d6 {[%emt 0:00:30]} 7. Nge2 {[%emt 0:00:00]} Nc6 {[%emt 0:00:30]} 8. O-O {[%emt 0:00:00]} Nd7 {[%emt 0:01:30]} 9. f4 {[%emt 0:01:30]} exf4 {[%emt 0:02:30]} 10. Bxf4 {[%emt 0:00:30]} Nce5 {[%emt 0:03:30]} 11. b3 {[%emt 0:00:30]} g5 {[%emt 0:02:30]} (11... c5 $14) 12. Bc1 {[%emt 0:02:30]} h6 {[%emt 0:04:30]} 13. d4 {[%emt 0:00:30]} Ng6 {[%emt 0:01:30]} 14. Bb2 {[%emt 0:01:30]} Re8 {[%emt 0:03:30]} 15. Qd2 {[%emt 0:01:30]} c6 {[%emt 0:03:30]} 16. Rf2 {[%emt 0:00:30]} Nf6 {[%emt 0:10:30]} 17. Raf1 {[%emt 0:52:30]} Nh8 {[%emt 0:42:30]} {Better is} 18. h3 $18 {[%emt 0:02:30]} (18. Qd3) 18... Rb8 {[%emt 0:01:09]} 19. Qd3 $16 {[%emt 0:00:30]} a6 {[%emt 0:00:34]} 20. a4 {[%emt 0:00:30]} b5 {[%emt 0:00:46]} 21. axb5 {[%emt 0:00:30]} axb5 {[%emt 0:00:55]} 22. cxb5 {[%emt 0:00:30]} cxb5 {[%emt 0:00:33]} 23. b4 {[%emt 0:00:30]} Bb7 {[%emt 0:00:37]} 24. d5 {[%emt 0:00:30]} Nd7 {[%emt 0:00:06]} 25. Nd4 {[%emt 0:00:30]} Bxd4 {[%emt 0:00:30]} 26. Qxd4 {[%emt 0:00:30]} Ne5 {[%emt 0:00:30]} 27. Nd1 {[%emt 0:00:30]} Bc8 {[%emt 0:00:30]} 28. Kh2 {[%emt 0:01:30]} Rb7 {[%emt 0:00:30]} 29. Ne3 {[%emt 0:00:30]} Nhg6 {[%emt 0:00:30]} 30. Nf5 {[%emt 0:00:30]} Bxf5 {[%emt 0:00:30]} 31. exf5 {[%emt 0:00:30]} Nf8 {[%emt 0:00:30]} 32. f6 {[%emt 0:00:30]} Nc4 {[%emt 0:00:30]} 33. Bc1 {[%emt 0:00:30]} Re5 {[%emt 0:00:30]} 34. Rf5 {[%emt 0:00:30]} Ng6 {[%emt 0:00:30]} 35. Qg4 {[%emt 0:00:30]} Qf8 {[%emt 0:00:40]} 36. h4 {[%emt 0:00:30]} gxh4 {[%emt 0:00:33]} 37. gxh4 {[%emt 0:00:30]} Kh8 {[%emt 0:00:36]} 38. h5 {[%emt 0:00:30]} Rxf5 {[%emt 0:00:31]} 39. Qxf5 {[%emt 0:00:30]} Nh4 {[%emt 0:00:24]} 40. Qg4 {[%emt 0:00:30]} Nxg2 {[%emt 0:00:30]} 41. Qxg2 {[%emt 0:00:30]} Ne5 {[%emt 0:00:30]} 42. Rg1 {[%emt 0:00:30]} Rc7 {[%emt 0:00:30]} 43. Bxh6 {[%emt 0:00:30]} Nf3+ {[%emt 0:00:25]} 44. Kh1 {[%emt 0:00:30]} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.4"]
[White "Estrada Lavin, Cristian Alexand"]
[Black "Donoso Diaz, Sebastian"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2116"]
[BlackElo "2251"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,63,7,7,7,7,7,7,7,9,14,13,13,12,8,6,0,11,-18,16,0,-4,-68,-26,-33,-41,-33,-11,-10,-6,-12,90,90,86,98,117,112,146,23,12,16,56,44,40,45,41,22,20,0,0,0,51,51,75,75,75,81]} 1. Nf3 d5 2. b3 c5 3. Bb2 Bg4 4. g3 Bxf3 $146 ({Predecessor:} 4... f6 5. Bg2 e5 6. O-O Nc6 7. d3 Bd6 8. Nbd2 Nge7 9. c4 d4 10. e3 O-O 11. exd4 cxd4 {0-1 (35) Georgiadis,N (2465)-Navara,D (2727) Wroclaw 2014}) 5. exf3 Nf6 6. Bg2 {A06: Réti Opening:1 Nf3 d5} Nc6 7. f4 e6 8. O-O {The position is equal.} Be7 9. d3 O-O 10. Nd2 Nd7 11. Nf3 Bf6 12. Bxf6 Qxf6 13. Re1 a5 14. Qe2 a4 15. Ne5 (15. bxa4 $11 Rxa4 16. c4) 15... Nd4 16. Qd2 Nxe5 17. fxe5 Qf5 18. c3 Nc6 19. f4 f6 (19... h5 $11) 20. exf6 $16 Qxf6 21. bxa4 Rf7 22. Qe3 Qxc3 {[#]} 23. Rac1 ({White should try} 23. f5 $1 $16) 23... Qd4 $11 24. Rxc5 Rxa4 25. Qxd4 Nxd4 {[#]} 26. Rxd5 $1 {[%mdl 512] Black must now prevent Re4.} Rc7 (26... exd5 27. Re8+) 27. Rd8+ Kf7 28. Rb1 b5 29. Rb2 Rc1+ (29... Rca7 $11) 30. Kf2 $14 Rc2+ 31. Rxc2 Nxc2 32. Ra8 {Accuracy: White = 58%, Black = 54%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.5"]
[White "Benitez Galeano, Alejandro"]
[Black "Gimenez Aguirre, Alejo Ismael"]
[Result "1-0"]
[ECO "A34"]
[WhiteElo "2052"]
[BlackElo "2247"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,95,20,31,18,14,17,11,-8,80,85,66,22,62,17,94,99,83,91,103,41,64,50,122,122,172,152,179,166,197,201,186,191,249,244,244,242,254,107,266,258,247,239,277,281,295,272,375,357,422,417,500,492,630,276,273,270,276,283,268,286,343,289,373,381,385,372,456,405,416,414,596,584,570,551,551,454,691,684,766,754,949,929,1176,1139,1015,883,1109,1079]} 1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. e3 Nf6 5. d4 e4 6. Nd2 {A34: Symmetrical English: 2 Nc3, lines with ...d5} (6. d5 exf3 7. dxc6 fxg2 8. cxd7+ Bxd7 9. Bxg2 g6 10. b3 Bg7 11. Qd6 Qb6 12. Qe5+ Kf8 13. Bb2 {½-½ (36) Dominguez Perez,L (2739)-Vachier Lagrave,M (2779) Saint Louis 2018}) 6... cxd4 7. exd4 Bb4 8. d5 {The position is equal.} Nb8 $146 (8... Bxc3 $11 9. bxc3 Ne5) ({Predecessor:} 8... Ne5 9. Qb3 Qe7 10. Nd1 Bc5 11. Ne3 d6 12. Be2 O-O 13. O-O {0-1 (27) Christiansen,J (2399)-Johansson,L (2425) Vaxjo 2016}) 9. Qc2 $16 O-O 10. Nb3 (10. Ndxe4 $2 Nxe4 11. Bd3 Bxc3+ 12. bxc3 Nf6 $19) 10... b5 11. a3 bxc4 (11... Bxc3+ $1 $11 {remains equal.} 12. Qxc3 (12. bxc3 bxc4 13. Bxc4 Qc7 $15) 12... bxc4 13. Bxc4 Ba6) 12. axb4 cxb3 13. Qxb3 d6 14. Be3 (14. Be2 $16) 14... Qe7 15. h3 $36 {[%mdl 2048] White is more active.} Ne8 (15... Nfd7 $14) 16. Qc4 Nf6 17. Be2 Bb7 18. Ra5 (18. Rxa7 $6 Rxa7 19. Bxa7 Nxd5 $16) 18... Rc8 19. Qd4 Nbd7 20. O-O h6 (20... Ne5 $142 21. Rfa1 (21. Rxa7 Rxa7 22. Qxa7 Ra8 $16) (21. Nxe4 Rc2 $18) 21... a6 22. Nxe4 Nxe4) 21. Rfa1 $18 (21. Rxa7 $6 Rxa7 22. Qxa7 Bxd5) 21... Nb6 22. R1a3 $1 (22. Rxa7 Nbxd5 23. Rxa8 Rxa8 $16) 22... Rc7 23. Nb5 (23. Rxa7 $18 {and White stays clearly on top.} Rxa7 24. Rxa7 Nfxd5 25. Nxd5 (25. Nxe4 Nxe3 26. Rxb7 Rxb7 $17) 25... Nxd5 26. Rxb7 $1 {[%mdl 576] Remove Defender} Rxb7 27. Qxd5 Rxb4 28. Bd4) 23... Rc2 $2 (23... Rd7 $16 {is a better defense.}) 24. Qd1 ({Worse is} 24. Rxa7 Rxe2 25. Kf1 {[#]} Rxe3 $1 $17 {[%mdl 512]}) 24... Rxe2 25. Qxe2 {Strongly threatening Bxb6.} Nbxd5 26. Rxa7 Rb8 27. Nc3 Nxe3 28. Qxe3 ({Don't do} 28. fxe3 Qf8 $18) 28... Qe5 29. Qb6 Nd7 30. Qb5 e3 {intending ...exf2+.} 31. Qxe5 (31. Rxb7 $142 exf2+ 32. Kxf2 Qd4+ 33. Kf1 Qf4+ 34. Ke2 Re8+ 35. Kd3 Re3+ 36. Kc2) 31... exf2+ 32. Kxf2 Nxe5 33. Kg3 Nc4 34. Ra2 d5 35. b3 Ne3 36. Ne2 Nf5+ 37. Kf4 Bc8 38. R2a4 Rb6 39. Ra8 Ne7 (39... g5+ {keeps fighting.} 40. Ke5 Ne7) 40. Nd4 {White is clearly winning.} g5+ 41. Ke3 Kg7 42. b5 Kf6 (42... Nf5+ $142 43. Nxf5+ Bxf5) 43. R4a7 Be6 44. Ra6 Rb7 45. R8a7 Nf5+ 46. Nxf5 {[%mdl 64] Pin} Rxb5 47. Nd4 Rc5 48. Rc6 {Accuracy: White = 54%, Black = 24%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.6"]
[White "Coro, Lucas"]
[Black "Melian, Juan Sebastian"]
[Result "1-0"]
[ECO "B80"]
[WhiteElo "2315"]
[BlackElo "1786"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,72,52,23,68,72,75,73,92,92,162,163,155,152,170,170,239,135,138,137,256,283,385,326,914,893,878,851,1088,1093,1058,1013,890,660,1007,982,991,946,1217,1189,1157,1121,29986,29987,29987,29988,29988,29989,29994,29995,29995,29996,29996,29997,29998,29999,29999]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. f4 d6 7. Be3 Nf6 8. Bd3 a6 9. Qf3 Be7 10. O-O h5 {B80: Sicilian Scheveningen: 6 g3 and 6 Be3, including English Attack} (10... O-O 11. Rae1 Nb4 12. Rc1 Bd7 13. a3 Nxd3 14. cxd3 Qb8 15. g4 h6 16. h4 Nh7 17. g5 hxg5 18. hxg5 Rc8 19. Kg2 {1-0 (31) Sanal,V (2490)-Laznicka,V (2675) Skopje 2018}) 11. Nxc6 Qxc6 $146 ({Predecessor:} 11... bxc6 12. e5 Nd5 13. Nxd5 cxd5 14. Bd4 Kf8 15. Qg3 dxe5 16. fxe5 Bc5 17. c3 Bd7 18. Qg6 Bxd4+ 19. cxd4 Bc8 20. Rf3 Rh6 21. Qg5 Qe7 22. Rxf7+ Qxf7 23. Qd8+ {1-0 (23) Lekic,L (2054)-Radosevic,N (1463) Cetinje 2013}) 12. a4 {[%cal Ba2a4,Ba4a5][%mdl 32] Threatens to win with Bb5!} O-O {White is better.} 13. a5 d5 (13... Bd8 $16 {was worth a try.}) 14. e5 $18 Ng4 15. Bd4 Bc5 16. Ne2 $1 g6 {[#]} (16... Bd7 $142 17. h3 Nh6 18. Qxh5 Nf5) 17. c3 (17. h3 $1 $18 {[%cal Rh3g4]} Nh6 18. g4) 17... Nh6 $16 18. h3 Nf5 {[#]} (18... h4 $16 19. Bf2 Qc7) 19. g4 $1 $18 {[%cal Rg4f5]} hxg4 20. hxg4 Ng7 $2 (20... Nxd4 21. cxd4 (21. Nxd4 Qc7 $16) 21... Be7) 21. Kg2 Bxd4 22. Nxd4 Qe8 23. Qh3 f5 24. Rh1 Kf7 25. Nf3 Bd7 26. Qh7 Rg8 27. Rh6 Bb5 28. Ng5+ Ke7 29. Rxg6 Bxd3 30. Rxg7+ {White mates.} Rxg7 31. Qxg7+ Kd8 32. Rh1 Qd7 {[#]} 33. Nxe6+ $1 {[%mdl 512]} Qxe6 34. Rh8+ Qe8 35. Qf6+ {[%mdl 64] Double Attack} Kd7 36. Qd6+ {[%mdl 64] Double Attack} Kc8 37. Rxe8# {Accuracy: White = 96%, Black = 19%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.7"]
[White "Aguilar, Luis Miguel"]
[Black "Gomez Barrera, Gonzalo Andres"]
[Result "1-0"]
[ECO "A11"]
[WhiteElo "2193"]
[BlackElo "2058"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,84,21,23,8,37,52,43,37,47,58,62,51,28,50,95,72,99,93,90,92,103,97,123,128,159,155,171,139,139,139,140,154,146,145,175,172,171,128,127,127,127,127,201,124,120,125,182,147,210,128,257,257,257,249,257,253,250,246,274,295,278,282,272,258,252,257,259,249,257,264,262,259,309,316,306]} 1. g3 Nf6 2. Bg2 d5 3. c4 c6 4. cxd5 cxd5 5. Nf3 Bg4 6. Ne5 Bf5 7. Qa4+ {A11: English Opening: 1...c6} Nbd7 {[#] White must now prevent ...Qc7.} 8. Nc3 e6 9. g4 {White is slightly better.} Bc2 10. Nxf7 Bxa4 11. Nxd8 Rxd8 12. Nxa4 Bd6 $146 ({Predecessor:} 12... Nxg4 13. Bh3 Ndf6 14. f3 Ne5 15. Bxe6 {½-½ (39) Grischuk,A (2785)-Gunina,V (2506) Moscow 2013}) 13. h3 O-O 14. Nc3 {[%cal Ba4c3,Bc3b1,Bb1d2][%mdl 32]} a6 15. d3 d4 16. Nb1 Rc8 17. Nd2 b5 18. Nb3 e5 19. a4 bxa4 20. Rxa4 Nc5 21. Nxc5 Rxc5 22. Bd2 Rc2 23. Rxa6 Rxb2 {[#] Hoping for ...Rb1+.} 24. Rxd6 Rb1+ 25. Bc1 Rxc1+ 26. Kd2 Rc3 (26... Rxh1 $16 27. Bxh1 Rb8) 27. Rc1 Rxc1 28. Kxc1 $16 {[%mdl 4096] Endgame KRB-KRN} Re8 (28... h6 $16 29. Rc6 Re8) 29. Kd2 Rb8 (29... h6 $16 30. Ra6 Kf7 31. Ra7+ Re7) 30. Bf3 {aiming for g5.} Rb2+ (30... h6 $16 {is a better defense.} 31. h4 Kf8) 31. Kc1 $18 Rb5 32. g5 Ne8 33. Rd8 Rc5+ 34. Kd2 Kf7 35. Bh5+ g6 36. Rd7+ Kg8 37. Bf3 Rc7 38. Rd5 Re7 39. Rd8 Kg7 40. Bd5 {White has a decisive advantage.} h6 41. h4 hxg5 42. hxg5 Nc7 {Accuracy: White = 81%, Black = 44%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.8"]
[White "Suarez, Pedro"]
[Black "Cadilhac, Igor Tokuichi Kikuc"]
[Result "0-1"]
[ECO "E48"]
[WhiteElo "2077"]
[BlackElo "2288"]
[Annotator "TA"]
[PlyCount "41"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,41,-18,-30,-13,-39,-41,-38,-39,-36,-39,-39,-30,-54,-42,-53,-51,-69,-31,-70,-19,-16,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nge2 dxc4 7. Bxc4 c5 8. O-O cxd4 9. exd4 Nc6 10. a3 Bd6 11. h3 h6 {E48: Nimzo-Indian: Rubinstein: 5 Bd3 d5 including 6 Ne2, but excluding 6 a3} (11... b6 12. Bg5 Bb7 13. d5 exd5 14. Bxd5 Be7 15. Bf3 h6 16. Bf4 Na5 17. Bxb7 Nxb7 18. Rc1 Nc5 19. Nd4 {½-½ (62) Vachier Lagrave,M (2789)-Ding,L (2791) Stavanger 2018}) 12. Be3 Ne7 13. Rc1 b6 {Black is slightly better.} 14. Qd3 $146 ({Predecessor:} 14. Nf4 Bb7 15. Nb5 Bb8 16. Nc3 Nf5 17. Qd3 g5 18. Nxe6 Qd6 19. f4 Nxe3 20. Nxf8 Nxc4 21. Qxc4 Kxf8 {0-1 (38) Jenik,G-Krizsan Lang,G Hungary 1967}) 14... Bb7 15. Ba6 Qb8 16. Bc4 a6 17. Ba2 Rd8 18. Rfd1 Ra7 19. Bb1 Ng6 ({Black should try} 19... Nf5 $1 $15) 20. f3 $11 Bh2+ 21. Kh1 {[%mdl 32768] Accuracy: White = 39%, Black = 60%. . Sensor Board Error (Ke4/e5)?} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.9"]
[White "Mayeregger, Arnold"]
[Black "Ayala Ruiz, Miguel Angel"]
[Result "1-0"]
[ECO "D05"]
[WhiteElo "1913"]
[BlackElo "1444"]
[Annotator "NA"]
[PlyCount "57"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. Nc3 Nc6 2. Nb1 Nb8 3. Nf3 Nf6 4. Ng1 Ng8 5. d4 Nf6 6. Nf3 e6 7. e3 c5 8. Bd3 d5 9. b3 Nc6 10. O-O cxd4 11. exd4 Be7 12. Bb2 Nb4 13. Be2 O-O 14. Nbd2 Bd7 15. a3 Nc6 16. Bd3 Bd6 17. Ne5 Qe7 18. f4 Kh8 19. Rf3 h6 20. Rh3 Kg8 21. g4 Ne4 22. Nxe4 dxe4 23. Bxe4 Bxe5 24. dxe5 g5 25. Rxh6 gxf4 26. Qf3 Qc5+ 27. Kg2 Nxe5 28. Qxf4 f5 29. Bxe5 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.10"]
[White "Allo Collante, Enrique"]
[Black "Araoz Andrade, Ivan Alexander"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "1595"]
[BlackElo "1843"]
[Annotator "NA RC"]
[PlyCount "97"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. c4 e5 2. Nc3 Nf6 3. g3 Nc6 4. Bg2 g6 5. Nf3 Bg7 6. O-O O-O 7. Ne1 {A29: English Opening: Four Knights Variation with 4 g3} (7. d4 d6 8. dxe5 dxe5 9. Bg5 Be6 10. Qa4 Qb8 11. Bxf6 Bxf6 12. Nd2 Nd8 13. Nde4 Bg7 14. Nc5 c6 15. Rad1 Qc7 16. N3e4 Bc8 17. Rd2 Ne6 18. Nxe6 Bxe6 {½-½ (31) Romanov,E (2576)-Demchenko,A (2661) Fagernes 2019}) 7... d6 8. Nc2 Be6 9. Ne3 Rb8 $146 ({Predecessor:} 9... Qd7 10. Rb1 Bh3 11. d3 Nd4 12. Ned5 Bxg2 13. Kxg2 Nh5 14. b4 c6 {0-1 (31) Vasko,I (1906)-Sandor,J (2015) Hungary 2015}) 10. d3 Ne7 11. Ne4 c6 12. Ng5 Bc8 13. Nf3 Nh5 14. d4 e4 15. Nd2 d5 16. Nc2 Be6 17. f4 Qd7 18. e3 Nf6 19. b3 Rfe8 20. Bb2 h5 21. Rc1 Nf5 22. Qe1 Bf8 23. h3 Be7 24. Qf2 Kg7 (24... Nh6 $19 {has better winning chances.} 25. h4 Bg4) 25. Rfd1 $19 (25. Nxe4 $17 {might work better.} dxe4 {[#]} 26. d5 $1 {[%mdl 512]} cxd5 27. cxd5 Qxd5 28. g4) 25... Nh6 26. cxd5 cxd5 27. Qf1 h4 28. g4 Nhxg4 29. hxg4 Bxg4 30. Qf2 h3 31. Bf1 Bxd1 32. Ne1 Bg4 33. Nb1 Bf5 34. Nc3 a6 35. Be2 Rh8 36. Rc2 Rbc8 37. Bd1 Ng4 38. Bxg4 Bxg4 39. Kh2 b5 40. Qg3 Bh4 41. Qg1 Bxe1 42. Qxe1 b4 43. Rf2 bxc3 44. Bxc3 Bf3 45. Rf1 Qb5 46. Rf2 Qd3 47. Bb4 Rc2 48. Rd2 Rxd2+ 49. Bxd2 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.11"]
[White "Menacho Admen, Victor Gabriel"]
[Black "Orrego Palermo, Marcelo"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "1103"]
[BlackElo "1632"]
[Annotator "NA RC"]
[PlyCount "44"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d5 2. Nc3 d4 3. Na4 e5 4. b3 Nf6 5. Nf3 Bd6 6. c3 dxc3 7. Nxc3 O-O 8. Bc4 a6 9. a4 Nbd7 10. a5 Bb4 11. Bb2 c6 12. Ba3 Bxa3 13. Rxa3 Nc5 14. Nxe5 Qd6 15. d4 Ncxe4 16. Nxe4 Qxa3 17. Nxf6+ gxf6 18. Nxf7 Qxa5+ 19. Ke2 Rxf7 20. Bxf7+ Kxf7 21. Ke3 Bd7 22. Qh5+ Qxh5 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "5.12"]
[White "Cosme Contreras, Trilce"]
[Black "Avalos Sanabria, Augusto Alfredo"]
[Result "1-0"]
[ECO "D12"]
[WhiteElo "2051"]
[BlackElo "1474"]
[Annotator "NA RC"]
[PlyCount "83"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 Bf5 5. e3 Nbd7 6. Be2 e6 7. O-O Bd6 8. h3 h6 9. a3 O-O 10. b4 Bc7 11. Bb2 a5 12. c5 Ne4 13. Nxe4 dxe4 14. Ne5 Nxe5 15. dxe5 Qg5 16. Kh1 Bg6 17. Bc4 Bxe5 18. Bxe5 Qxe5 19. Rb1 axb4 20. axb4 Rfd8 21. Qc2 Ra3 22. Rb3 Rxb3 23. Bxb3 Ra8 24. Rd1 Ra1 25. Rxa1 Qxa1+ 26. Kh2 Qe5+ 27. Kg1 f5 28. Qd2 Kh7 29. Qd6 Qa1+ 30. Kh2 Qa3 31. Qxe6 h5 32. Qg8+ Kh6 33. h4 Bh7 34. Qe6+ Bg6 35. Qg8 Qxb4 36. Qh8+ Bh7 37. Bg8 Kg6 38. Bxh7+ Kf6 39. Qf8+ Ke6 40. Qxf5+ Ke7 41. Qxe4+ Kf8 42. Bg6 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.1"]
[White "Munoz, Francisco Javier"]
[Black "Zapata Charles, Santiago"]
[Result "1/2-1/2"]
[ECO "D03"]
[WhiteElo "2308"]
[BlackElo "2322"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,88,5,44,51,62,70,89,77,110,98,146,139,147,141,156,151,196,179,195,186,192,188,194,174,191,156,163,175,186,178,194,180,225,229,229,222,230,218,223,197,195,206,202,196,200,130,131,130,264,183,183,184,177,137,131,86,81,91,84,79,72,0,0,-8,-5,-8,-8,-8,-10,-13,-9,-17,0,-11,0,-19,0]} 1. d4 d5 2. c3 g6 3. Nf3 Bg7 4. Bg5 Nf6 5. Nbd2 O-O 6. e3 c5 7. Be2 Nc6 8. dxc5 {D03: 1 d4 d5 2 Nf3 Nf6 3 Bg5, including Torre Attack with early ...d5} (8. O-O cxd4 9. exd4 Bf5 10. Re1 a6 11. h3 b5 12. Nb3 b4 13. c4 a5 14. cxd5 Nxd5 15. Rc1 Qd6 16. Bb5 Rfc8 17. Bh4 Na7 {1-0 (33) Harikrishna,P (2726)-Bacrot,E (2720) Dubai 2014}) 8... a5 9. a4 e5 10. e4 $146 {White is better.} ({Predecessor:} 10. Qb3 h6 11. Bh4 g5 12. Bg3 Qe7 13. h3 Rd8 14. O-O Ne4 15. Nxe4 dxe4 {1-0 (28) Castaneda,G (2518)-Brunello,S (2591) Wijk aan Zee 2012}) 10... dxe4 11. Bxf6 $1 Qxf6 12. Nxe4 Qf4 13. Nd6 e4 14. Qd2 Qg4 {[#]} 15. h3 $1 {[%cal Rh3g4]} Qe6 16. Ng5 e3 17. Qxe3 ({Don't do} 17. fxe3 $6 Qe5 $16) 17... Qxe3 18. fxe3 Bh6 19. Nge4 f5 20. Nxc8 Raxc8 21. Nd6 Rc7 22. Kf2 Re7 23. Bc4+ Kg7 24. Rhe1 Re5 25. Bb5 Rb8 26. Rad1 Rxc5 27. e4 fxe4 28. Rxe4 Bg5 29. Ne8+ Kf8 30. Nc7 {aiming for Ne6+.} Rf5+ (30... Nd4 $16 31. Rexd4 (31. Rdxd4 Rxc7 32. g3 Kg7 $16) 31... Rxc7) 31. Ke2 Kg8 32. h4 Bf4 33. Nd5 Bg3 34. Bxc6 {Threatens to win with Ne7+.} Rf2+ 35. Ke3 {Hoping for Bb5.} bxc6 36. Ne7+ {[%mdl 64] [#] Double Attack} Kf8 37. b4 ({White should play} 37. Nxc6 $16 Rbxb2 38. Rd8+ Kg7 39. Rd7+ Kh6 40. Nd4) 37... Rf6 $11 {The position is equal.} 38. b5 cxb5 39. axb5 {Black must now prevent Nd5.} Rxb5 40. Rd8+ Kg7 41. Rg8+ Kf7 {Strongly threatening ...Re5.} 42. Rh8 Kg7 43. Rg8+ Kf7 {And now ...Re5 would win.} 44. Rh8 Kg7 {Accuracy: White = 66%, Black = 50%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.2"]
[White "Benitez Galeano, Alejandro"]
[Black "Zambrano Acebo, Jean Junior"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2052"]
[BlackElo "2174"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,103,6,4,4,0,0,1,-4,-7,0,-2,26,0,0,0,7,10,10,18,20,0,0,0,20,26,77,23,25,-16,-12,-12,-12,-16,-16,-22,0,0,15,25,36,-2,-3,0,0,0,0,0,0,0,0,-12,0,0,0,0,970,0,0,0,0,0,31,0,4,0,5,5,6,0,0,0,0,0,107,101,104,84,219,216,192,191,490,486,464,445,535,530,514,512,735,732,1241,1215,1903,867]} 1. Nf3 Nf6 2. c4 e6 3. b3 b6 4. Bb2 Bb7 5. e3 Be7 6. Nc3 O-O {A13: English Opening: 1...e6} 7. d4 (7. Qc2 c5 8. Ng5 h6 9. h4 Re8 10. O-O-O Nc6 11. a3 {1-0 (28) Mamedyarov,S (2801)-Karjakin,S (2773) Saint Louis 2018}) 7... d5 8. cxd5 Nxd5 {The position is equal.} 9. Bd3 c5 10. O-O Nc6 11. Nxd5 Qxd5 12. dxc5 Bxc5 13. Qe2 Rfd8 14. Rfd1 Qh5 $1 15. Ba6 Bxa6 16. Qxa6 Bd6 $146 ({Predecessor:} 16... f6 17. Qc4 Qf7 {1-0 (27) Vavra,P (2121)-Steiner,P (1897) Hradec Kralove 2011}) 17. h3 Ne5 (17... f6 $11) 18. Nd4 ({White should play} 18. Bxe5 $16 Bxe5 19. Rac1 (19. g4 Qxh3 20. Nxe5 f6 $16)) 18... Bc5 $11 19. Rdc1 Qg6 {aiming for ...Nd3.} 20. Qe2 Nd3 {Threatens to win with ...Bxd4.} 21. Rd1 Nxb2 22. Qxb2 Rd5 23. b4 Be7 24. Nc6 Bf6 25. Rxd5 Bxb2 26. Ne7+ {[%mdl 64] [#] Double Attack} Kf8 27. Nxg6+ hxg6 28. Rb1 {Black must now prevent Rd7.} exd5 29. Rxb2 {[%mdl 4096] Endgame KR-KR} Rc8 30. Kf1 Rc1+ 31. Ke2 Ke7 32. Kd2 Kd6 $2 {[%mdl 8192] [#]} (32... Rf1 $11) 33. g3 $2 (33. Kxc1 $18 a6 34. Rb3) 33... Rc4 34. h4 Ke5 35. Kd3 b5 36. Rb1 f6 37. a3 f5 38. Re1 Kf6 39. f4 Ke6 40. Rb1 Kd6 41. g4 Ke6 (41... d4 $11) 42. gxf5+ $16 gxf5 43. Rg1 Kf6 (43... d4 $16 {is a better defense.}) 44. h5 $18 Kf7 45. Rg5 Rc1 $2 (45... a5 46. Rxf5+ (46. bxa5 Ra4 $16) 46... Ke6) 46. Rxf5+ {White is clearly winning.} Ke6 47. Re5+ Kd6 48. Rg5 Rd1+ 49. Ke2 Ra1 50. Rg6+ Kc7 51. Rxg7+ Kb6 52. Kd3 {Accuracy: White = 58%, Black = 36%.} (52. h6 $142 Rh1 53. h7) 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.3"]
[White "Coro, Lucas"]
[Black "Cantero, Rodolfo"]
[Result "1/2-1/2"]
[ECO "C88"]
[WhiteElo "2315"]
[BlackElo "2059"]
[Annotator "TA"]
[PlyCount "139"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,139,11,9,16,15,0,10,-12,11,-16,7,0,20,0,0,0,15,18,17,6,6,8,54,66,58,0,64,44,48,51,46,37,164,73,91,91,133,114,107,120,125,158,135,150,153,0,148,121,229,229,347,345,618,567,4133,2963,1643,221,205,66,67,67,65,-106,-118,-149,-136,-152,43,50,45,42,62,15,15,15,15,18,17,8,21,20,20,15,24,23,27,25,54,42,41,0,27,0,32,31,38,34,31,31,33,16,22,0,8,0,10,0,8,0,17,17,34,32,40,19,16,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 b4 9. d3 d6 10. a5 Be6 11. Bxe6 {C88: Closed Ruy Lopez: Anti-Marshall Systems} fxe6 12. Nbd2 Rb8 (12... d5 13. Nb3 d4 14. Bd2 Rb8 15. Rc1 Rb5 16. h3 Qd6 17. Bg5 Nd7 18. Bxe7 Qxe7 19. Nfd2 Nc5 20. Nc4 Nb7 21. Ra1 Nd6 22. Ncd2 Nb7 23. Nc4 Nd6 24. Ncd2 Nb7 25. Nc4 {½-½ (25) Vachier Lagrave,M (2773)-Aronian,L (2763) Karlsruhe/Baden Baden 2019}) 13. Nc4 h6 14. h3 Qe8 $146 ({Predecessor:} 14... Nh7 15. c3 bxc3 16. bxc3 Bg5 17. Nxg5 Nxg5 18. Be3 Nf7 19. Nd2 Nh8 {1-0 (106) Sethuraman,S (2618)-Bellia,F (2444) Abu Dhabi 2017}) 15. c3 Qg6 16. Kh1 Rb5 17. Be3 Nd7 18. Ncd2 Nc5 (18... Rxa5 $2 19. Rxa5 Nxa5 20. Qa4 $18) 19. Qe2 bxc3 (19... Bf6 {keeps more tension.} 20. Kg1 Nb7 21. Reb1 Nc5 22. Rc1 Nb7) 20. bxc3 Nb3 (20... Nxa5 $2 21. c4 $18) 21. Nxb3 Rxb3 22. d4 (22. Reb1 $14 Rxb1+ 23. Rxb1) 22... exd4 (22... Qxe4 $2 23. Nd2 $18) (22... Rxc3 $11 23. Qxa6 Rxf3 $1 {[%mdl 512]} 24. gxf3 exd4) 23. cxd4 $14 {Qc4 is the strong threat.} Rb5 $1 (23... Qxe4 $2 24. Nd2 $16) 24. Qc2 $36 {[%mdl 2048] White has the initiative.} Rh5 25. Nh2 (25. Qxc6 Rxf3 26. Kh2 Qg4 $1 $17 {[%mdl 512]}) 25... Nxa5 (25... Nb4 $1 $14 26. Qxc7 Bh4) 26. Qxc7 (26. Reb1 $1 $18 {is more deadly.}) 26... Bd8 27. Qxd6 {Threatens to win with f3.} Nc4 28. Qc6 Nxe3 29. fxe3 Rf2 {[%csl Gf2][%cal Rg6g2]} 30. Rg1 $1 Kh7 31. e5 Bg5 32. Ra3 $2 (32. Rxa6 $6 Bxe3 33. Qxe6 Qxe6 $14) ({Better is} 32. Ng4 $16 Rb2 33. Qf3 (33. Rxa6 Qf5 $15)) 32... Qf5 (32... Bh4 $1 $11 33. Ng4 (33. Rxa6 $2 Bg3 $19) 33... Rff5) 33. e4 $1 $16 {[%cal Re4f5]} (33. Qxa6 $2 Rxh3 $1 {[%mdl 512]} 34. Rga1 Rxe3 $19) 33... Qf7 (33... Qg6 $16) 34. d5 $1 $18 (34. Rxa6 Rxh3 $3 {[%mdl 512]} 35. gxh3 Rxh2+ $1 {[%mdl 512]} 36. Kxh2 Qf2+ 37. Kh1 Qf3+ 38. Rg2 Qf1+ 39. Kh2 Bf4+ 40. Rg3 Qf2+ $1 {[%mdl 512]} 41. Kh1 Bxg3 42. Qxe6 Qh2#) 34... Bf4 (34... exd5 $142 35. exd5 Rd2) 35. Ng4 ({Inferior is} 35. Qxe6 Qxe6 36. dxe6 Bxh2 $11) ({Not} 35. dxe6 Qg6 $11) ({Stronger than} 35. Qxa6 Bxh2 36. Kxh2 Rxe5 $11) 35... Re2 $2 (35... Bxe5 36. Nxf2 Qf4) 36. Rf3 Rxe4 37. dxe6 Qg6 {[#]} 38. Qc2 $2 (38. Nf6+ $1 {[%mdl 512]} gxf6 39. exf6) 38... Bxe5 {[#] Hoping for ...Rxg4.} 39. Nf2 (39. e7 $1 $18 Bd4 {[#]} 40. Rf4 $1 {[%mdl 512]} Rxe7 41. Qxg6+ Kxg6 42. Rxd4) 39... Rf4 $14 40. Qxg6+ $1 Kxg6 41. e7 $2 (41. Re1 $1 $14 {stays ahead.} Rxf3 42. gxf3) 41... Kf7 $1 $17 42. Re1 Rxf3 43. gxf3 Kxe7 $2 {[%mdl 4096] Endgame KRB-KRN} ({Black should try} 43... Ke8 $17 44. Kg2 a5) 44. f4 $1 $14 {[%cal Rf4e5][%mdl 64] Pin} Kd6 45. fxe5+ Rxe5 {KRN-KR} 46. Ra1 a5 47. Kg2 Kc6 48. Kf3 Kb5 49. Ne4 Kc4 50. Ke3 Rh5 51. Nf2 Kb3 52. Rb1+ Kc2 53. Rb7 Rg5 54. Rc7+ Kb3 55. Rb7+ Kc4 56. Rc7+ Kb5 57. Kd4 a4 58. Ra7 Rg3 59. Rb7+ Kc6 60. Rb2 g5 61. Kc4 a3 62. Re2 Kd7 63. Kd5 h5 64. Ra2 Rb3 65. Ne4 {Black must now prevent Nc5+.} Rxh3 66. Nxg5 Rb3 67. Ne4 {aiming for Nc5+.} Ke7 {The position is equal.} 68. Ke5 h4 69. Kf4 h3 70. Ng5 {Accuracy: White = 34%, Black = 35%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.4"]
[White "Donoso Diaz, Sebastian"]
[Black "Heinechen, Juan"]
[Result "1/2-1/2"]
[ECO "A35"]
[WhiteElo "2251"]
[BlackElo "2123"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,91,29,46,40,68,60,69,72,66,72,67,53,56,47,41,46,39,-12,-10,-13,0,-42,-42,-31,-39,-56,-49,-86,-91,-99,-97,-102,-104,-128,-118,-111,56,-44,-34,-225,-225,-225,-225,-225,-225,-225,-226,-226,-184,-225,-202,-200,-194,-197,-167,-171,-165,-150,-116,-116,-116,-116,-116,-151,-116,-116,-109,-109,-68,-68,-64,-66,-39,-67,-12,-12,-12,-12]} 1. Nf3 c5 2. c4 Nc6 3. Nc3 g6 4. e3 Bg7 5. d4 cxd4 6. exd4 d6 7. d5 Ne5 8. Nxe5 Bxe5 9. Bd3 {A35: Symmetrical English: 2 Nc3 Nc6 3 Nf3} Bg7 10. O-O Nf6 11. Bg5 {White is slightly better.} O-O 12. Qd2 Re8 13. Rae1 $146 ({Predecessor:} 13. Rfe1 e5 14. dxe6 Bxe6 15. Rad1 Qb6 16. b3 Qa5 17. Bxf6 Bxf6 {1-0 (48) Kurnosov,I (2663)-Ismagambetov,A (2471) Astana 2012}) 13... Qb6 14. Re2 Bg4 15. Re3 h6 16. Bxf6 (16. Bh4 $14) 16... exf6 $11 17. Rfe1 Bd7 18. Re7 Rxe7 19. Rxe7 Qd8 20. Qe1 f5 21. c5 dxc5 22. d6 {Hoping for Bc4.} Bc6 23. Bc4 Qxd6 24. Bxf7+ Kf8 25. Re6 Qf4 $2 {[#]} (25... Qd7 $17 26. Bxg6 Be4 27. Rxe4 fxe4) 26. Bxg6 (26. Nd5 $1 $14 {[%mdl 512]} Qd4 (26... Bxd5 27. Re8+) 27. Rxc6 Kxf7 28. Rc7+ Kg8 29. Qe6+ Kh8 30. g3) 26... Bd4 $40 {[%mdl 128] Strongly threatening ...Qg4! Black mounts an attack.} 27. Nd1 $2 {[#]} (27. Ne2 $15 Qg4 28. Qf1 Bxb2 29. f3) 27... Qg4 $1 $19 {[%csl Gc6][%cal Rg4g2][%mdl 512]} 28. Qf1 f4 29. Rxc6 bxc6 30. Be4 Qe6 31. Bf3 Re8 32. g3 fxg3 33. hxg3 Qe1 34. Bxc6 Re2 35. Bf3 Qxf1+ 36. Kxf1 {[%mdl 4096] Endgame KRB-KBN} Re7 37. Be2 Kg7 38. Ke1 Rf7 39. f3 Rb7 40. b3 h5 41. Nf2 Kh6 42. Ne4 Rg7 43. Kd2 Rd7 44. Kd3 {[#]} h4 $1 {[%mdl 512]} 45. gxh4 $11 Kh5 46. Kc4 {Accuracy: White = 53%, Black = 62%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.5"]
[White "Aguilar, Luis Miguel"]
[Black "Estrada Lavin, Cristian Alexand"]
[Result "1/2-1/2"]
[ECO "A12"]
[WhiteElo "2193"]
[BlackElo "2116"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,110,-13,-1,-23,-22,-36,-33,-37,-27,-35,-18,-57,-45,-61,-52,-106,-57,-134,-86,-65,-69,-90,-54,-62,-33,-35,0,-11,12,-23,0,-29,0,0,0,-20,14,4,12,7,7,25,72,43,47,43,38,38,35,21,33,0,7,0,8,0,0,-17,-18,-34,-21,-37,0,0,0,0,0,-8,-8,-10,-8,-8,-7,-8,-10,-7,0,-13,-13,-12,-12,-22,-22,-22,-24,-43,-19,-25,0,0,0,-18,0,0,0]} 1. g3 d5 2. Bg2 Nf6 3. c4 c6 4. b3 Bf5 5. Nf3 e6 6. O-O h6 7. d3 Be7 8. Bb2 O-O 9. Nbd2 Nbd7 10. h3 {A12: English Opening: 1...c6 with b3 by White} (10. a3 a5 11. Qb1 Bh7 12. b4 axb4 13. axb4 Qb6 14. Bc3 Rxa1 15. Qxa1 Bxb4 16. Bxb4 Qxb4 17. Rb1 Qd6 18. Rxb7 e5 {1-0 (33) Rapport,R (2702)-Carlsen,M (2840) Wijk aan Zee 2017}) 10... Bh7 11. Kh2 a5 $146 ({Predecessor:} 11... Qc7 12. Qc2 Rac8 13. a3 a5 14. Rac1 Qb8 15. Qc3 b6 16. b4 axb4 17. axb4 Qd6 {0-1 (38) Kokol,P (2260)-Schnider,G (2353) Bad Gleichenberg 2013}) 12. a3 {Black is slightly better.} Qb8 13. Re1 Rd8 14. Bc3 e5 15. cxd5 cxd5 16. a4 ({White should try} 16. e4 $15) 16... Bd6 17. Nb1 ({Better is} 17. e4 $15) 17... b5 18. axb5 Qxb5 19. Nfd2 h5 20. Kg1 Bc5 21. Rf1 e4 22. dxe4 dxe4 23. e3 Bf5 24. Qc1 Rdc8 25. Qb2 Bb4 26. Bd4 Qd3 {[#] White must now prevent ...Rc2.} 27. Rc1 Qa6 28. Nc3 {[%cal Rd2e4,Bb1c3,Bc3e2,Be2d4][%mdl 32]} Qe6 29. Ne2 g5 30. Kh2 Rxc1 31. Qxc1 Ne5 32. Bxe5 Qxe5 33. Nc4 Qc7 34. Nd4 Bg6 35. Qb2 Nd5 {Hoping for ...Bc3.} 36. Qc2 Nc3 37. Ne2 Nxe2 38. Qxe2 Rd8 39. Rc1 Rd3 40. Qb2 Qe7 41. Ne5 Rd2 42. Rc8+ Kg7 $1 43. Nxg6+ Rxb2 44. Nxe7 Bxe7 $11 {[%mdl 4096] Endgame KRB-KRB} 45. Rc7 Kf6 46. Kg1 Rb1+ 47. Kh2 Rxb3 48. Bxe4 a4 {[%cal Ba5a4,Ba4a3][%mdl 32]} 49. Ra7 a3 50. Bd5 Rb2 51. Kg2 Rd2 52. Bc4 Rc2 53. Bb3 {The position is equal.} Rb2 54. Bc4 Rc2 55. Bb3 Rb2 {Accuracy: White = 50%, Black = 42%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.6"]
[White "Gimenez Aguirre, Alejo Ismael"]
[Black "Cadilhac, Igor Tokuichi Kikuc"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "2247"]
[BlackElo "2288"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,118,2,37,14,8,8,6,12,0,-29,-20,-21,-25,-36,-41,-37,-29,-29,-26,-67,-70,-70,-70,-67,-62,-58,-52,-45,-44,-44,-40,-31,-34,-49,-45,-33,-31,-45,-34,-50,-33,-43,-48,-150,-149,-143,-141,-150,-153,-143,-143,-152,-89,-94,-83,-188,-193,-196,-189,-274,-269,-352,-344,-385,-385,-450,-389,-540,-536,-536,-573,-810,-813,-791,-781,-945,-921,-865,-536,-495,-472,-822,-812,-936,-476,-1258,-772,-914,-906,-1321,-1298,-1318,-1310,-2360,-2360,-1754,-1752,-7728,-7585,-29972,-29962,-29988,-29989,-29989,-29990,-29990,-29991]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d3 Nf6 6. d4 d5 7. Bd3 Nc6 {[%cal Bb8c6,Bc6b4,Bb4d3][%mdl 32]} 8. h3 {C01: French: Exchange Variation} (8. O-O Be7 9. c3 Bg4 10. Re1 O-O 11. Bg5 h6 12. Bh4 Ne8 13. Bg3 Bd6 14. Nbd2 Bxg3 15. hxg3 Nf6 {1-0 (56) Arizmendi Martinez,J (2507)-Perez Tores,J (2218) Linares 2018}) 8... Nb4 9. O-O Nxd3 10. Qxd3 {The position is equal.} Be7 11. c4 $146 ({Predecessor:} 11. Re1 O-O 12. Bg5 Re8 13. Nc3 c6 14. Nd2 Bd7 15. a3 Qc8 {1-0 (21) Cometa,L (1889)-Celis Vargas,W (1726) Bogota 2017}) 11... dxc4 12. Qxc4 Be6 $36 {[%mdl 2048] Black fights for an advantage.} 13. Qb5+ Qd7 14. Qxd7+ Nxd7 (14... Kxd7 {is more complex.} 15. Ne5+ Kc8 16. Nc3 Nd5 17. Re1 Re8) 15. Nc3 Nb6 16. Bg5 f6 $1 {[%cal Rf6g5]} 17. Bf4 c6 18. Rfe1 Kf7 19. Ne4 Nd5 20. Bd6 {Hoping for Bxe7.} Bf5 {aiming for ...Bxe4.} 21. Bxe7 Bxe4 $1 22. Rxe4 {Black must now prevent Bc5.} Nxe7 23. Nd2 Rad8 24. Rae1 Rd7 25. Nb3 {With the idea Nc5.} b6 26. g4 Nd5 27. f3 h5 28. Kg2 (28. Nc1 $15) 28... g5 $17 29. Kg3 Nf4 {And now ...hxg4 would win.} 30. h4 hxg4 31. fxg4 Nd3 {[%mdl 64] Double Attack} 32. Rh1 Nxb2 (32... gxh4+ $142 33. Rxh4 Rxh4 34. Kxh4 Nxb2) 33. h5 Nd3 34. Nd2 (34. Re3 $17 Nb4 35. a4) 34... c5 $19 35. Nf3 c4 36. Rf1 {[#]} (36. Ne1 {was called for.}) 36... Nf4 $1 37. a4 Rc8 38. Kf2 c3 39. Ke3 Rc4 40. Rc1 Rxa4 41. h6 Kg6 42. Re8 Ra2 {[%csl Gf4][%cal Ra2e2]} 43. Ng1 Kxh6 44. Kf3 Rxd4 45. Rxc3 Ng6 46. Ne2 Rd1 47. Rc7 (47. Rc6 $142) 47... Ne5+ 48. Kf2 Rd7 49. Rc3 (49. Rxd7 $142 Nxd7 50. Re4) 49... Nxg4+ 50. Kg3 Ne5 51. Re3 Rdd2 52. Rh8+ Kg7 53. Rh2 Rd3 54. Rxd3 Nxd3 {KRN-KRN} 55. Kf3 {[#]} Nf4 $1 56. Rh1 (56. Nxf4 Rxh2) 56... Nxe2 {Black mates.} 57. Kg4 Ra3 58. Rd1 Kg6 {[%csl Ge2][%cal Ra3g3]} 59. Rd3 f5+ {Accuracy: White = 30%, Black = 84%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.7"]
[White "Vazquez, Facundo"]
[Black "Mayeregger, Arnold"]
[Result "1/2-1/2"]
[ECO "D74"]
[WhiteElo "2086"]
[BlackElo "1913"]
[Annotator "NA RC"]
[PlyCount "49"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 O-O 5. Nf3 d5 6. Bg2 dxc4 7. Ne5 c5 8. dxc5 {D74: Fianchetto Grünfeld: Main Line (5 Nf3 0-0 6 cxd5 Nxd5 7 0-0)} Qa5 (8... Qc7 9. Nxc4 Qxc5 10. Qb3 (10. Nd2 Rd8 11. Qa4 Bd7 12. Qc4 Qxc4 13. Nxc4 Bc6 14. e4 b6 15. O-O Na6 {½-½ (41) Zuluaga Mancilla,C (2386)-Pinero,C (2168) Barquisimeto 2013}) 10... Nc6 11. Be3 Nd4 12. Bxd4 Qxd4 13. Na5 Qe5 14. Qb4 Qh5 15. h4 Be6 {½-½ (31) Erdos,V (2613)-Nezad,H (2422) Caleta 2016}) 9. Be3 $146 ({Predecessor:} 9. Nxc4) 9... Qa6 10. Qa4 Qe6 11. Nxc4 Bd7 12. Qb3 Bc6 13. O-O Bxg2 14. Kxg2 Qc6+ 15. Kg1 Nbd7 16. Na5 Qc7 17. Qa3 ({But not} 17. Nxb7 Rfb8 $11) 17... b6 18. Nb3 bxc5 19. Nxc5 Nb6 20. N5a4 Nc8 ({Better is} 20... Qe5) 21. Rac1 Qd7 22. Rfd1 ({White should try} 22. Bc5 $16) 22... Qh3 $1 23. f3 Nd6 24. b3 Nf5 25. Bd2 $19 (25. Rd3 $11 {and White is okay.}) 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.8"]
[White "Araoz Andrade, Ivan Alexander"]
[Black "Suarez, Pedro"]
[Result "0-1"]
[ECO "C06"]
[WhiteElo "1843"]
[BlackElo "2077"]
[Annotator "NA RC"]
[PlyCount "54"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4 f6 9. exf6 Qxf6 10. Nf3 h6 11. O-O Bd6 $1 12. Bd2 {C06: French Tarrasch: 3...Nf6 4 e5 Nfd7 5 Bd3 main lines} (12. Ng3 O-O 13. Bc2 Rf7 14. Re1 Nf8 15. Nh5 Qd8 16. Ne5 Bxe5 17. dxe5 Qb6 18. Nf4 Bd7 19. Nd3 Rc8 20. Be3 Qd8 {½-½ (72) Svane,R (2570)-Sethuraman,S (2623) Moscow 2017}) 12... O-O 13. Bc3 Rf7 14. Ng3 Nf8 15. Rc1 $146 ({Predecessor:} 15. Qe2 Bd7 16. Rae1 Be8 17. Ne5 Rc7 18. Qg4 a6 19. f4 b5 20. Nxc6 Rxc6 {0-1 (57) Urhegyi,M (2249)-Stockova,Z (2293) Slovakia 2018}) 15... a6 16. a3 Bd7 17. Qe2 Be8 18. b4 Rc7 19. Ne5 Rac8 20. Bb2 {[#]} Nxd4 $1 21. Bxd4 Rxc1 22. Nc6 Rxf1+ $19 23. Nxf1 Qh4 24. g3 Qh5 25. g4 Qh3 26. Na5 Rc1 27. f3 Rxf1+ 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.9"]
[White "Melian, Juan Sebastian"]
[Black "Gomez Barrera, Gonzalo Andres"]
[Result "0-1"]
[ECO "D13"]
[WhiteElo "1786"]
[BlackElo "2058"]
[Annotator "NA RC"]
[PlyCount "74"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. Nf3 d5 3. Bg5 c5 4. c3 cxd4 5. cxd4 Ne4 6. Bf4 {D13: Slav Defence: Exchange variation without ...Bf5} Nc6 7. Nbd2 $146 ({Predecessor:} 7. Nc3 e6 8. Rc1 Qa5 9. Bd2 Nxd2 10. Qxd2 Bd6 11. e3 Bd7 12. Bd3 O-O 13. O-O Rfc8 14. e4 dxe4 15. Bxe4 Qh5 {1-0 (35) Matuszewski,M (2485)-Vovk,Y (2600) Poland 2017}) 7... Bf5 8. e3 e6 9. Be2 g5 10. Nxe4 $1 gxf4 11. Nc3 fxe3 12. fxe3 Bh6 13. Qd2 Rg8 14. Rg1 Be4 15. Rc1 Bxf3 16. Bxf3 Qh4+ 17. g3 Qg5 18. Ke2 (18. Kf2 $15) 18... O-O-O 19. b4 Kb8 20. Na4 e5 21. dxe5 Nxe5 22. Qd4 Rge8 23. Rc3 Nxf3 24. Kxf3 Bg7 25. Qf4+ Qxf4+ 26. gxf4 Bxc3 27. Nxc3 d4 28. Ne2 Rxe3+ 29. Kf2 Ra3 30. Nc1 d3 31. Rd1 d2 32. Nb3 Rxa2 33. Ke2 Ra3 34. Nxd2 $19 Rad3 35. h4 a6 36. h5 Rh3 37. Rg1 Rh2+ 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.10"]
[White "Orrego Palermo, Marcelo"]
[Black "Cosme Contreras, Trilce"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "1632"]
[BlackElo "2051"]
[Annotator "NA RC"]
[PlyCount "110"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. Bg5 g6 3. Bxf6 exf6 4. e3 Bg7 5. g3 O-O 6. Bg2 f5 {A45: Trompowsky Attack} 7. Ne2 c5 (7... d6 8. c4 c6 9. Nbc3 Nd7 10. O-O Nf6 11. b4 Re8 12. Qd3 Qe7 13. b5 Ne4 14. a4 a6 15. bxc6 bxc6 16. Rab1 a5 17. Rb6 Ra6 18. Rb8 Qc7 19. Rfb1 Nf6 {1-0 (83) Kryakvin,D (2567)-Ponkratov,P (2605) Serpukhov 2018}) 8. O-O cxd4 $146 ({Predecessor:} 8... d6 9. Nbc3 Nc6 10. Nd5 cxd4 11. exd4 Be6 12. Re1 Bxd5 13. Bxd5 {0-1 (48) Morant Amezaga,C-Frances Saez,J (2081) Alzira 2003}) 9. Nxd4 Nc6 10. c3 d5 11. Ne2 Be6 12. Nd2 Qc7 13. Nb3 Rfd8 14. Qc2 Rac8 15. Rfd1 b5 16. Nf4 Ne7 17. Nd4 Qb6 18. Qb3 a6 19. Nc2 Qc5 20. a4 g5 21. Nxe6 fxe6 22. axb5 axb5 23. Ra5 Rb8 24. Na3 Nc6 25. Rxb5 Rxb5 26. Qxb5 Qxb5 27. Nxb5 Rb8 28. Nc7 Nd8 29. Rb1 Bxc3 30. b3 Kf7 31. Bf1 Ke7 $11 32. Na6 Rb6 33. b4 Nb7 34. Rc1 Bxb4 35. Nxb4 Rxb4 36. Rc7+ Kd6 37. Rxh7 Nc5 38. h4 gxh4 39. gxh4 Rb7 40. Rxb7 Nxb7 41. h5 Ke5 42. f4+ Kf6 43. Bb5 Nd6 44. Bd7 Ke7 45. Ba4 Ne4 46. Kg2 Nf6 47. Bd1 Kf7 48. Kg3 Ne4+ 49. Kg2 Kg7 50. Be2 Kh6 51. Kh3 Nd6 52. Kg3 Nc4 53. Kf2 Nd2 54. Kg3 Nc4 55. Kf2 Nd2 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.10"]
[White "Orrego Palermo, Marcelo"]
[Black "Cosme Contreras, Trilce"]
[Result "*"]
[ECO "A45"]
[WhiteElo "1632"]
[BlackElo "2051"]
[Annotator "NA RC"]
[PlyCount "31"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. Bg5 g6 3. Bxf6 exf6 4. e3 Bg7 5. g3 O-O 6. Bg2 f5 7. Ne2 c5 8. O-O cxd4 9. Nxd4 Nc6 10. c3 d5 11. Ne2 Be6 12. Nd2 Qe7 13. Nb3 Rfe8 14. Qc2 Rac8 15. Rfd1 b5 16. Nf4 ({Don't blunder} 16. Bxd5 $2 {[#]} Nb4 $1 $19 {[%mdl 576] Double Attack, Pin}) *

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.11"]
[White "Ayala Ruiz, Miguel Angel"]
[Black "Menacho Admen, Victor Gabriel"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "1444"]
[BlackElo "1103"]
[Annotator "NA RC"]
[PlyCount "47"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nf6 6. d4 d5 7. Bd3 Nc6 8. Be3 g6 9. Qd2 Bg4 10. Be2 Ne4 11. Nxe4 dxe4 12. Ng5 Bxe2 13. Qxe2 f5 14. Qc4 Qd7 15. O-O-O O-O-O 16. d5 Ne7 17. Nf7 Bg7 18. d6 Rhf8 19. dxe7 Qxe7 20. Rxd8+ Rxd8 21. Nxd8 Qxd8 22. Rd1 Qh4 23. Qg8+ Qd8 24. Qxd8# 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.14"]
[Round "6.12"]
[White "Avalos Sanabria, Augusto Alfredo"]
[Black "Allo Collante, Enrique"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1474"]
[BlackElo "1595"]
[Annotator "NA RC"]
[PlyCount "86"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Bd3 Bxd3 6. Qxd3 c5 7. c3 Nc6 8. O-O Nge7 9. Be3 Ng6 10. Nbd2 Be7 11. b3 O-O 12. h3 Rc8 13. Rfe1 Qd7 14. Nf1 cxd4 15. cxd4 Nb4 16. Qd2 Nc2 17. Ng3 Bb4 18. Qe2 Bxe1 19. Rxe1 Nxe1 20. Nxe1 Qc6 21. Bd2 Qb6 22. Qe3 f5 23. exf6 Rxf6 24. Nf3 Nf4 25. Ne5 Qd6 26. Ng4 Rff8 27. Qe1 Qb6 28. Bc3 Qa6 29. a4 h5 30. Ne5 h4 31. Nf1 Ne2+ 32. Kh2 Rxc3 33. b4 Rc2 34. Ne3 Ra2 35. Nd7 Qd6+ 36. Ne5 Nxd4 37. N3g4 Re2 38. Qd1 Rxe5 39. Nxe5 Qxe5+ 40. Kh1 Rxf2 41. Kg1 Qg3 42. Qg4 Ne2+ 43. Qxe2 Qxg2# 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.1"]
[White "Zapata Charles, Santiago"]
[Black "Zambrano Acebo, Jean Junior"]
[Result "0-1"]
[ECO "B06"]
[WhiteElo "2322"]
[BlackElo "2174"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,78,42,54,0,0,0,0,-14,15,23,40,46,40,38,37,35,47,43,46,46,41,33,37,10,20,12,18,13,45,-19,-22,-5,37,36,60,62,62,26,33,31,52,39,35,30,24,21,29,0,52,-22,-22,-27,-25,-28,5,0,0,0,0,0,0,0,3,-20,0,-8,-12,-7,0,-876,-871]} 1. e4 c5 2. Nf3 g6 3. c3 d5 4. exd5 Qxd5 5. d4 Bg7 6. h3 {B06: Modern Defence} (6. Nbd2 $14) (6. Na3 cxd4 7. Bc4 Qe4+ 8. Be3 Nh6 9. Bd3 Qd5 10. Bc4 Qe4 11. Bd3 Qd5 12. Bc4 Qa5 13. Bb5+ Nc6 14. Nxd4 O-O 15. Nxc6 bxc6 {0-1 (38) Papp,G (2603)-Matlakov,M (2700) Caleta 2019}) 6... Nf6 $11 7. c4 $146 ({Predecessor:} 7. Qb3 Qxb3 8. axb3 cxd4 9. Nxd4 O-O 10. Na3 Bd7 11. Be2 Nc6 12. Nxc6 Bxc6 13. O-O {½-½ (13) Finegold,B (2489)-Perelshteyn,E (2534) Lubbock 2011}) 7... Qd8 8. d5 {The position is equal.} Ne4 9. Bd3 Qa5+ 10. Nbd2 Nd6 11. O-O O-O 12. Re1 Re8 13. Ne4 Nxe4 14. Bxe4 Nd7 15. Bd3 b5 16. cxb5 Bb7 17. Bd2 Qc7 18. Bc3 Bxd5 19. Be4 ({White should play} 19. Bxg6 $14 Bxf3 20. Bxf7+ Kxf7 21. Qxf3+ Nf6 22. Re5) 19... Bxe4 20. Rxe4 Nf6 21. Rc4 Rad8 22. Qc2 Rd5 23. Re1 Qb7 24. a4 e6 25. b4 cxb4 26. Bxb4 a6 27. bxa6 Qxa6 28. Rc7 Nd7 (28... Bf8 $11 29. Bc3 Rf5) 29. Rd1 (29. a5 $1 $14) 29... Nb6 {[#] And now ...Rxd1+ would win.} 30. Rxd5 Nxd5 31. Rc4 Rb8 32. Bd2 h6 33. a5 Rb2 34. Qa4 $36 {[%mdl 2048] White has good play.} Kh7 35. Qc6 Qa7 36. Qc5 Qb8 37. g3 Qb3 38. Kg2 Qa2 39. Be1 $2 {[%mdl 8192] [#]} (39. Bxh6 $11 Bxh6 40. Rh4) 39... Qxc4 $1 {[%mdl 512] Accuracy: White = 38%, Black = 63%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.2"]
[White "Cantero, Rodolfo"]
[Black "Benitez Galeano, Alejandro"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2059"]
[BlackElo "2052"]
[Annotator "NA RC"]
[PlyCount "99"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 21,99,0,2,-10,24,-36,5,0,4,-2,12,20,32767,-33,-3,-38,32767,-27,10,-3,0,32767,-4,-22,0,-90,-30,-83,-50,-56,32767,32767,32767,32767,32767,32767,32767,32767,0,32767,32767,-73,-117,32767,-91,32767,72,32767,70,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,32767,25,29,30,16,32767,-22,-20,-17,-90,-29,-168,-179,-195,-233,-300,32767,504]} 1. e4 {[%emt 0:00:30]} c5 {[%emt 0:00:30]} 2. Nf3 {[%emt 0:00:00]} e6 {[%emt 0:00:00]} 3. d3 {[%emt 0:00:00]} Nc6 {[%emt 0:01:00]} 4. g3 {[%emt 0:00:00]} Nge7 {[%emt 0:04:30]} 5. Bg2 {[%emt 0:00:00]} g6 {[%emt 0:00:30]} 6. O-O {[%emt 0:00:30]} Bg7 {[%emt 0:00:00]} 7. Re1 {[%emt 0:00:30]} d6 {[%emt 0:01:00]} 8. c3 {[%emt 0:04:30]} O-O {[%emt 0:01:30]} 9. Be3 {[%emt 0:02:30]} Rb8 {[%emt 0:05:30]} 10. d4 {[%emt 0:02:30] A04: Unusual lines after 1 Nf3 and King's Indian Attack} (10. a4 b6 11. Nbd2 d5 12. Bg5 f6 13. exd5 Nxd5 14. Be3 Nxe3 15. Rxe3 Ne7 16. Qc2 Nf5 17. Re2 e5 {½-½ (44) Sundell,B (2171)-Andersson,S (1956) Ostersund 2018}) 10... cxd4 {[%emt 0:02:30]} 11. Nxd4 {[%emt 0:00:30]} a6 {[%emt 0:03:30]} 12. f4 {[%emt 0:07:30]} Qc7 $146 {[%emt 0:06:30]} ({Predecessor:} 12... Nxd4 13. Bxd4 Bxd4+ 14. Qxd4 Nc6 15. Qe3 b5 16. Rd1 Qc7 17. Kh1 Bb7 18. Nd2 Rfd8 19. Nf3 Na5 20. f5 Nc4 21. Qh6 Bxe4 22. f6 {1-0 (22) Cherry,A (1949)-San Diego,M Manila 2011}) 13. Re2 {[%emt 0:12:30]} (13. Nd2 $11) 13... b5 {[%emt 0:03:30]} 14. Nxc6 {[%emt 0:00:30]} Nxc6 {[%emt 0:01:30]} 15. Rd2 {[%emt 0:03:30]} Rd8 {[%emt 0:00:30]} 16. Na3 {[%emt 0:04:30]} e5 {[%emt 0:16:30]} 17. Qc2 {[%emt 0:03:30]} Ne7 {[%emt 0:10:30]} 18. Rad1 {[%emt 0:07:30]} Be6 {[%emt 0:02:30]} 19. Qb1 {[%emt 0:11:30]} Rbc8 {[%emt 0:06:30]} 20. Nc2 {[%emt 0:06:30]} a5 {[%emt 0:00:30]} 21. Ne1 {[%emt 0:02:30]} b4 {[%emt 0:03:30]} 22. cxb4 {[%emt 0:00:30]} axb4 {[%emt 0:00:00]} 23. b3 {[%emt 0:02:30]} (23. fxe5 $11 {remains equal.} Bxe5 24. Nf3) 23... Bg4 {[%emt 0:06:00]} 24. Nf3 {[%emt 0:01:30]} Nc6 {[%emt 0:07:23]} 25. h3 {[%emt 0:14:52]} exf4 {[%emt 0:00:58]} 26. gxf4 {[%emt 0:00:30]} Bh5 {[%emt 0:00:05]} 27. Rf1 {[%emt 0:00:37]} Qa5 {[%emt 0:00:30]} 28. Nh2 {[%emt 0:00:36]} Na7 {[%emt 0:00:30]} 29. f5 {[%emt 0:00:40]} Be5 {[%emt 0:00:30]} 30. f6 {[%emt 0:00:45]} Rc3 {[%emt 0:00:58]} 31. Qe1 {[%emt 0:01:14]} Nc6 {[%emt 0:03:16]} 32. Ng4 {[%emt 0:00:44]} Bxg4 $1 {[%emt 0:01:24]} 33. hxg4 {[%emt 0:00:01]} Rxe3 $2 {[%emt 0:00:16]} (33... Qc7 $17) 34. Qxe3 {[%emt 0:00:34]} Qc5 {[%emt 0:00:02]} 35. Qxc5 {[%emt 0:01:46]} dxc5 {[%emt 0:00:00]} 36. Rd5 {[%emt 0:01:25]} Bd4+ {[%emt 0:01:09]} 37. Kh2 {[%emt 0:00:27]} h6 {[%emt 0:00:05]} 38. g5 {[%emt 0:03:23]} hxg5 {[%emt 0:01:03]} 39. Rxg5 {[%emt 0:00:01]} Be5+ {[%emt 0:00:18]} 40. Kh3 {[%emt 0:01:53]} Rd3+ {[%emt 0:01:23]} 41. Rf3 {[%emt 0:00:39]} Rd2 {[%emt 0:00:02]} 42. Rff5 {[%emt 0:01:28]} Rd3+ $1 {[%emt 0:02:05]} 43. Kh4 {[%emt 0:01:53]} Bc3 {[%emt 0:00:12]} 44. Rf1 {[%emt 0:01:48]} Ne5 {[%emt 0:01:51]} 45. Rg3 $1 {[%emt 0:00:24]} Rd2 {[%emt 0:00:15]} 46. Bf3 {[%emt 0:00:43]} (46. a4 $11) 46... Rxa2 {[%emt 0:01:07]} 47. Rh3 {[%emt 0:00:30] [#]} (47. Kh3 $15) 47... Nd7 $1 {[%emt 0:00:47]} 48. e5 {[%emt 0:00:25]} Bxe5 {[%emt 0:00:10]} 49. Bd5 $19 {[%emt 0:00:17]} Rg2 {[%emt 0:00:22]} 50. Bxg2 {[%emt 0:00:04]} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.3"]
[White "Donoso Diaz, Sebastian"]
[Black "Munoz, Francisco Javier"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2251"]
[BlackElo "2308"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,60,35,21,27,13,29,-22,40,32,34,36,39,39,102,115,170,163,167,165,139,150,165,156,156,161,489,454,477,174,533,533,531,531,485,370,339,341,312,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. e3 Nf6 3. c4 c6 4. Nc3 Bg4 5. d4 e6 6. h3 Bxf3 7. Qxf3 Bd6 8. Bd3 Nbd7 9. O-O O-O {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4} 10. Bd2 Re8 11. Qd1 (11. g4 $142) 11... Qe7 (11... dxc4 $11 12. Bxc4 Nb6) 12. c5 $14 Bc7 13. f4 {[#]} b6 $146 ({Predecessor:} 13... Ba5 14. Qb1 Bxc3 15. Bxc3 b6 16. b4 Reb8 17. Qc2 {½-½ (55) Dreev,A (2607)-Predojevic,B (2645) Kemer 2007}) 14. b4 {[%cal Bb2b4,Bb4c5][%mdl 32]} bxc5 ({Black should play} 14... a5 $14) 15. bxc5 $16 e5 (15... Ba5 $16) 16. fxe5 $18 Nxe5 17. dxe5 Qxe5 {Strongly threatening ...d4.} 18. Rf4 Rad8 19. Ne2 {Nd4 is the strong threat.} Ne4 20. Nd4 g5 $2 (20... Nxd2 21. Qxd2 Qxe3+ 22. Qxe3 Rxe3) 21. Nxc6 {[%mdl 64] [#] Double Attack} Qb2 22. Rg4 $2 (22. Rf5) 22... h5 $2 (22... Nxd2 23. Rxg5+ (23. Nxd8 Qe5 $18) 23... Kf8 24. Bxh7 Nf3+ 25. gxf3 Qh2+ 26. Kf1 Qxh3+ 27. Rg2 Qxh7) 23. Bxe4 hxg4 24. Bc2 gxh3 25. gxh3 Qf6 26. Nxd8 Qe5 {[#]} 27. Nc6 $2 (27. Kf1 $1 $18 Rxd8 28. Rb1) 27... Qg3+ $11 {[%mdl 64] Double Attack. The position is equal.} 28. Kf1 Qxh3+ 29. Ke2 Qg4+ 30. Kf1 Qh3+ {Accuracy: White = 55%, Black = 35%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.4"]
[White "Heinechen, Juan"]
[Black "Coro, Lucas"]
[Result "0-1"]
[ECO "B15"]
[WhiteElo "2123"]
[BlackElo "2315"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,86,10,6,19,16,10,1,0,93,81,75,49,36,4,70,66,74,77,133,110,150,149,275,149,217,208,226,212,202,233,216,208,195,194,199,203,243,310,278,161,271,175,678,605,902,615,566,-41,-58,-100,-104,-171,-181,-904,-892,-1034,-1125,-29948,-29959,-29972,-6070,-5683,-5608,-5387,-5193,-4627,-4627,-4627,-4631,-29975,-29979,-29978,-29977,-29995,-29996,-29996,-29997]} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Ng3 h5 6. Bc4 h4 7. N3e2 {B15: Caro-Kann: 3 Nc3: 3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6} (7. Nf1 h3 8. g3 e5 9. Be3 e4 10. c3 Nbd7 11. Qb3 Qe7 12. Bg5 Rh5 13. Bxf6 gxf6 14. Be2 Rh8 {½-½ (75) Stanojoski,Z (2451)-Jovic,S (2259) Struga 2018}) 7... Bf5 8. Nf3 e6 9. h3 {The position is equal.} Bb4+ $146 (9... Be4 $11) ({Predecessor:} 9... Be4 10. Nf4 Bd6 11. O-O Qc7 12. Nd3 Nbd7 13. Ng5 Bd5 14. Bxd5 cxd5 {½-½ (78) Csiszar,V (1906)-Kende,G (2036) Hungary 2018}) 10. c3 $16 Be7 11. Nf4 Nbd7 12. Nd3 Be4 (12... Nd5 $11) 13. O-O $14 a6 14. Re1 c5 (14... b5 $142 15. Bb3 c5) 15. Ng5 Bf5 16. Nf4 {[%cal Rc4e6] Strongly threatening Bxe6!} cxd4 {[#]} (16... O-O $16 17. Nxf7 Rxf7) 17. cxd4 (17. Bxe6 $1 $18 {[%mdl 512]} Bxe6 18. Ngxe6 fxe6 19. Nxe6 {[%mdl 64] Double Attack}) 17... Rc8 {[#]} (17... O-O $16) 18. Bxe6 $1 $18 {[%mdl 512]} fxe6 (18... Bxe6 19. Nfxe6) 19. Nfxe6 Bxe6 20. Nxe6 $40 {[%mdl 128] White has strong attack.} Qb6 21. Qd3 {[%cal Rd3g6]} ({Worse is} 21. Nxg7+ Kf7 $11) 21... Nf8 22. Nxg7+ Kf7 23. Nf5 $1 {[%mdl 1024] White has strong compensation.} ({Don't blunder} 23. Qf5 $2 Rc7 $19) 23... Ng6 24. Bg5 Rh5 25. f4 (25. Nxe7 $142 Nxe7 26. Rxe7+ $1 {[%mdl 512]} (26. Qe3 Ned5 $17) 26... Kxe7 27. Qe2+ Kf8 28. Bxf6 Qxf6 29. Qxh5) 25... Rhh8 (25... Bf8 {was necessary.}) 26. b4 {Qb3+ is the strong threat.} Qxb4 $2 (26... Qc6) 27. Rab1 Qa5 28. Rxe7+ Nxe7 29. Rxb7 $2 (29. Nxe7 $18 {Intending Qg6+ and mate.} Kxe7 30. d5 Qc5+ 31. Kh2) 29... Rc7 $1 $15 {Threatens to win with ...Qe1+.} 30. Qb3+ Ned5 31. Rxc7+ (31. Nxh4 $17 {was worth a try.} Rxb7 32. Qxb7+ Qc7 33. Qxa6) 31... Qxc7 $19 32. Bxf6 $2 (32. Nh6+ Kg7 33. Nf5+ Kh7 34. Nxh4) 32... Qc1+ 33. Kh2 Qxf4+ 34. Kg1 Kxf6 35. Qxd5 Qxf5 (35... Rb8 $142 36. Qc6+ Kxf5 37. Qc2+ Kf6 38. a3 Qxd4+ 39. Kh1 Qa1+ {[%mdl 64] Double Attack} 40. Kh2 Qe5+ 41. Kg1 Qe1+ 42. Kh2 Qe5+ 43. Kh1 Rb2 44. Qd3 Kg7 45. Kg1 Ra2 46. Qd7+ Kh6 47. Qc6+ Kg5 48. Qc1+ Kh5 49. Qd1+ Kh6 50. Qc1+ Kg7 51. a4 Qg3 52. Qf1 Qe3+ 53. Kh2 Qe5+ 54. Kg1 Re2 55. Kh1 {[#]} Re1 $1 {[%mdl 512]} 56. Qg1 Rxg1+ 57. Kxg1 Qe1+ 58. Kh2 a5 59. g4 hxg3+ 60. Kg2 Qf2+ 61. Kh1 Qh2#) 36. Qd6+ Kg5 37. Qe7+ Kh5 38. Qe2+ Kg6 39. Qxa6+ Kg5 40. Qb7 Re8 {Black mates.} 41. Qg7+ Qg6 42. Qd7 Qb1+ 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.5"]
[White "Cadilhac, Igor Tokuichi Kikuc"]
[Black "Aguilar, Luis Miguel"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2288"]
[BlackElo "2193"]
[Annotator "TA"]
[PlyCount "167"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,167,43,13,44,-5,48,48,50,53,47,42,73,56,55,48,122,68,156,151,163,68,79,78,95,89,114,110,116,114,122,97,115,102,125,118,113,98,135,136,141,93,140,127,139,110,148,151,166,151,224,230,297,301,319,304,417,377,389,313,376,377,444,375,491,497,583,588,619,608,596,585,557,531,449,472,449,403,413,396,397,397,406,419,573,577,995,964,1184,682,647,629,639,633,581,485,456,350,708,701,901,877,1084,1100,983,720,485,31,24,16,13,-63,0,0,840,-592,173,0,1197,604,525,171,1614,163,823,313,2187,262,29985,0,29987,-603,29991,-610,239,-564,408,244,217,193,12794,20,29983,1414,29988,3081,29990,588,29993,-5069,29989,8,29995,-643]} 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 Be7 6. O-O c6 7. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} O-O 8. h3 Qc7 9. a5 Rd8 $146 {C41: Philidor Defence} ({Predecessor:} 9... exd4 10. Nxd4 Ne5 11. Bb3 Re8 12. Re1 Bd7 13. f4 Ng6 14. Qd3 Bf8 15. Be3 b5 16. axb6 axb6 17. Qc4 Rxa1 18. Rxa1 {0-1 (47) Sadzikowski,D (2480)-Kunin,V (2571) Germany 2015}) 10. d5 Nf8 (10... b5 $11 11. axb6 Nxb6) 11. Be3 $14 Bd7 {White is slightly better.} 12. Qe2 h6 13. Bb3 Be8 14. Nd2 Ng6 15. g3 Nd7 (15... Qc8 $14) 16. h4 (16. a6 $16) 16... Bf6 (16... Nf6 $14) 17. Rfd1 Ne7 18. f3 ({Better is} 18. a6 $18) 18... Nc5 19. Ba2 Na6 20. Qf2 Nc8 21. Kg2 $36 {[%mdl 2048] White has strong initiative.} Nb4 22. Bb3 Be7 23. Nf1 Na6 24. Qd2 Nc5 25. Ba2 Na6 26. Bf2 Kh7 27. Ne3 Bf8 28. Ne2 Qb8 29. Bc4 Nc7 30. Bb3 c5 31. f4 b5 32. c3 a6 (32... h5 $16 {was worth a try.} 33. Bc2 f6) 33. f5 $18 Ra7 34. g4 Na8 35. Ng3 Be7 36. Rh1 f6 37. Nef1 Kg8 38. Nh2 Bf7 39. Nf3 Kf8 40. g5 Ke8 41. gxh6 gxh6 42. Qxh6 Kd7 43. Qg7 Rf8 44. h5 Nc7 45. Nh4 Ne8 46. Qg4 {Threatens to win with Ng6.} Rh8 47. Ng6 Rh7 48. h6 Rb7 49. Nh5 c4 50. Bc2 b4 51. Ba4+ Kd8 52. Bc6 bxc3 53. Bxb7 cxb2 54. Rab1 Qxb7 55. Qe2 c3 56. Qc2 Nc7 $2 (56... Bxd5 57. exd5 Qxd5+ 58. Kg3 Qc6 59. Bb6+ Kd7) 57. Qxc3 Nxd5 58. Rxb2 Nxc3 59. Rxb7 Nxe4 60. Bb6+ Nxb6 61. Nxe7 $2 ({Only move:} 61. axb6 $18 Bd5 62. Rb8+ Kd7 63. Nxe7 Kxe7 64. Rd1 Rxh6 65. Rxd5 Rxh5 66. b7 Rxf5 67. Re8+ $1 {[%mdl 576] Decoy, Clearance, Promotion} Kxe8 68. b8=Q+ Kd7 69. Rd3 Rg5+ 70. Kf1) 61... Nd7 $14 62. Nc6+ Kc8 63. Rb2 ({White should try} 63. Ra7 $11 Bd5 64. Nb4 {[%mdl 64] Double Attack}) 63... Rxh6 (63... Bd5 $1 $15 64. Nb4 Bb7 65. Rc1+ Nec5+ 66. Kg1 Rxh6) 64. Ng7 $11 Nec5 $2 {[%mdl 8192]} (64... Rxh1 $11 65. Kxh1 Ng5) 65. Kg1 $4 {[%mdl 8192]} (65. Na7+ $18 {and all is fine.} Kd8 66. Rxh6) 65... Kc7 $4 {[%mdl 8192]} (65... Rxh1+ $19 66. Kxh1 Bd5+ {[%mdl 64] Double Attack} 67. Kh2 Bxc6) 66. Nb4 $2 (66. Rxh6 $18 Kxc6 67. Rb1) 66... Bc4 $2 {[%mdl 8192]} (66... Rxh1+ $11 67. Kxh1 d5) 67. Ne8+ Kd8 {Strongly threatening ...Rxh1+.} 68. Nxd6 $2 (68. Rxh6 Kxe8 69. Rh8+ Nf8 70. Rc2) 68... Bg8 $2 (68... Rxh1+ 69. Kxh1 Bg8) 69. Rc2 $2 (69. Rxh6 Ke7 70. Rd2) 69... Bb3 $2 (69... Rxh1+ 70. Kxh1 Ke7) 70. Rc3 $2 (70. Rxh6 Bxc2 71. Nxc2) 70... Bd1 $2 (70... Rxh1+ 71. Kxh1 Ba4) 71. Nd5 $2 (71. Rxh6 {Intending Rh7 and mate.} Ke7 72. Nc8+ Ke8 73. Nd5) 71... Be2 $2 (71... Rxh1+ $18 72. Kxh1 Bb3) 72. Kf2 $2 (72. Nf7+ Ke8 73. Nd6+ Kf8 74. Rxh6 Bd3 75. Nxf6 Bc4 76. Nxd7+ Nxd7 77. Rxc4) 72... Bd3 $2 {[%mdl 8192]} (72... Rxh1 $11 73. Kxe2 Rh2+ 74. Ke1 e4) 73. Ke3 $4 {[%mdl 8192]} (73. Rxh6 Be4 74. Rh8+ Nf8 75. Nxf6 Bd5 76. Rxc5 Be6 77. fxe6 Ke7 78. Nfe4) 73... Bb1 $4 {[%mdl 8192]} (73... Rxh1 $19 74. Nf7+ Ke8 75. Nd6+ Kf8) 74. Nxf6 $4 {[%mdl 8192]} (74. Rxh6 {is the narrow road to win.} Ba2 75. Rh8+ Nf8 76. Rxf8+ {[%mdl 64] Double Attack} Kd7 77. Rxc5 Kxd6 78. Rcc8 e4 79. Rfd8+ Ke5 80. Ne7 Bf7 81. Rc5+ Bd5 82. Rdxd5#) 74... Nxf6 $4 {[%mdl 8192]} (74... Rxh1 $19 {avoids the disaster.} 75. Kd2 Bxf5 76. Nxd7 Kxd7 77. Nxf5 Ne4+ {[%mdl 64] Double Attack} 78. Kd3 Nxc3 79. Kxc3 Ra1) 75. Rxc5 $4 {[%mdl 8192]} (75. Rxh6 $18 Ng4+ 76. Kf3 Nxh6 77. Rxc5) 75... Kd7 $4 {[%mdl 8192]} (75... Rxh1 $19 {and life is good for Black.} 76. Kd2 Bxf5 $1 {[%mdl 512]} 77. Rxe5 Bd7 78. Nb7+ Kc7) 76. Rcc1 ({Don't play} 76. Rxb1 Kxd6 77. Rc8 Rh3+ 78. Ke2 Rh2+ 79. Kf3 Rh5) (76. Rxh6 $142 Ng4+ 77. Kf3 Nxh6 78. Rxe5) 76... Nd5+ $18 77. Kd2 Ba2 $2 (77... Rxd6 78. Rxb1 Ne7+ 79. Kc3 Nxf5 80. Rh7+ Ke6) 78. Nc4 $2 (78. Rxh6 $18 Ne7 79. f6) 78... e4 $2 {[%mdl 8192]} (78... Rxh1 $11 79. Nxe5+ Kd6 80. Nf7+ Ke7 81. Rxh1 Kxf7) 79. Nb6+ (79. Rxh6 $142 Ke7 80. Rxa6 Bb3 81. Re6+ {[%mdl 64] Double Attack} Kf8 82. a6 Nc7 83. a7 Kg8 84. Re7) 79... Kd6 80. Nxd5 (80. Rxh6+ $142 Ke5 81. Nxd5 Kd4 82. Ne7 e3+ 83. Ke2 Bb3 84. Rxa6 Ke4 85. Re6+ $1 {[%mdl 576] Promotion} Bxe6 86. fxe6) 80... Bxd5 81. Ke3 (81. Rxh6+ $142 Kd7 82. Rxa6 Bg8 83. Ke3 Bd5 84. Rd1 $1 {[%mdl 512]} Kc8 85. Rxd5 Kb7 86. Re6) 81... Ke5 82. Rc5 $4 {[%mdl 8192]} (82. Rxh6 {was the only winning move.} Kxf5 83. Rc5 $1 {[%mdl 512]} Kg5 84. Rxa6 Kh4 85. Rxd5 Kg3 86. Rg6+ Kh4 87. a6 Kh3 88. Rh5#) 82... Kd6 $4 {[%mdl 8192] [#]} (82... Rxh1 $19 83. f6 Rh3+ 84. Ke2 Kd4) 83. Kd4 $2 (83. Rxd5+ $1 {[%mdl 512] mates} Kxd5 84. Rxh6 Ke5 85. Rxa6 Kxf5 86. Rb6 Ke5 87. a6 Kd5 88. a7) 83... Bb7 $2 {[%mdl 8192]} (83... Rxh1 $11 84. Rxd5+ Ke7 85. Kxe4 Ra1 86. Re5+ Kf8) 84. Re5 $4 {[%mdl 40960] Accuracy: White = 31%, Black = 16%. . Loss on time!?} (84. Rxh6+ Kd7 85. Rh7+ Ke8 86. Rxb7 Kd8 87. Kxe4 Ke8 88. Rc8#) 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.6"]
[White "Estrada Lavin, Cristian Alexand"]
[Black "Suarez, Pedro"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2116"]
[BlackElo "2077"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,86,27,6,18,-21,-13,-18,-8,-6,3,1,4,0,0,0,0,-10,0,0,0,0,0,-2,27,19,32,24,52,46,48,50,48,20,59,59,69,55,83,83,85,83,88,77,79,89,147,147,147,147,210,196,239,223,258,254,269,267,433,430,473,303,725,688,675,613,29990,29991,29997,29998,29998]} 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. b3 e6 5. Bb2 d5 6. c4 dxc4 7. bxc4 c5 8. O-O Be7 9. d3 O-O 10. Nbd2 Nc6 {A14: English Opening: 1...e6 with b3 by White} 11. Qc2 $146 ({Predecessor:} 11. Ne5 Qc7 12. Ndf3 Nxe5 13. Bxe5 Qd7 14. a4 Qc8 15. a5 Nd7 16. Bc3 Bc6 17. Qc2 Bf6 18. Bxf6 Nxf6 {½-½ (30) So,W (2815)-Carlsen,M (2832) chess.com INT 2017}) 11... Qc7 12. Bc3 Rfd8 {The position is equal.} 13. Qb2 Rac8 14. Nb3 Ne8 15. Rab1 Ba8 16. Ne5 Bf6 {[%cal Rc6e5]} 17. Nxc6 Bxc6 18. Bxf6 Nxf6 19. Bxc6 Qxc6 20. Nd2 Qd6 21. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} e5 22. f3 Qd4+ 23. Qxd4 exd4 24. a5 Rc6 25. Ne4 Nd7 26. g4 Re8 27. Rb2 Kf8 28. Ra1 h6 29. axb6 axb6 30. Kf2 g6 31. h4 f5 {[#]} ({Black should play} 31... Rc7) 32. gxf5 $1 $16 gxf5 {[#]} 33. Ng3 $1 Rf6 (33... Nf6 $16 34. Nxf5 Nh5) 34. Nh5 $18 Rd6 35. Nf4 Kf7 36. Ra7 Rb8 37. Rb1 Kf8 $2 (37... Rd8 38. h5 Rb8) 38. Rg1 b5 39. Ng6+ Ke8 $2 {[#]} (39... Kf7 40. cxb5 Ke6 41. Nf4+ Ke5) 40. Ne5 $1 {[%mdl 512] Black must now prevent Rg8+.} Nf6 (40... Nxe5 41. Rg8#) 41. cxb5 Rxb5 42. Rgg7 Rb8 43. Rge7+ Kd8 {Accuracy: White = 80%, Black = 32%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.7"]
[White "Gomez Barrera, Gonzalo Andres"]
[Black "Vazquez, Facundo"]
[Result "0-1"]
[ECO "C16"]
[WhiteElo "2058"]
[BlackElo "2086"]
[Annotator "NA RC"]
[PlyCount "60"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 b6 5. Qg4 Bf8 6. Bg5 Qd7 7. O-O-O Nc6 8. Kb1 Bb7 9. Nge2 h6 10. Be3 O-O-O 11. Ng3 g6 12. h4 h5 13. Qf3 Na5 14. Bg5 Re8 $14 15. Bb5 c6 16. Bd3 Kb8 17. a3 Ba8 18. b4 Nb7 19. Na2 Rc8 20. c3 Nd8 21. Bxg6 Bxb4 22. axb4 fxg6 23. Ne2 Nf7 24. Bf6 Nxf6 25. Qxf6 Rhg8 26. Nf4 Nd8 27. Rd3 c5 28. Nxg6 Rc7 29. Nf4 Qh7 30. Kb2 Rf7 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.8"]
[White "Mayeregger, Arnold"]
[Black "Orrego Palermo, Marcelo"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "1913"]
[BlackElo "1632"]
[Annotator "NA RC"]
[PlyCount "53"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. c4 Nf6 2. g3 e6 3. Bg2 c5 4. Nf3 Be7 5. O-O O-O 6. Nc3 d6 {A30: Symmetrical English: Double Fianchetto and Hedgehog} (6... a6 7. b3 d6 8. Bb2 b6 9. d4 cxd4 10. Nxd4 Ra7 11. e3 Bb7 12. Bxb7 Rxb7 13. f4 Qd7 14. g4 Nc6 15. g5 Ne8 16. Nxc6 Qxc6 {1-0 (54) Nisipeanu,L (2678)-Enders,P (2460) Germany 2016}) 7. b3 Nbd7 8. Bb2 a6 9. e3 Rb8 10. a4 b6 11. d3 $146 ({Predecessor:} 11. d4 Re8 12. Qc2 Qc7 {1-0 (54) Janko,M (2271)-Bezuch,M (2198) Slovakia 2010}) 11... Bb7 12. e4 Qc7 13. Ne1 d5 14. cxd5 exd5 15. f4 dxe4 16. dxe4 Rfd8 17. Qe2 Nf8 18. e5 Bxg2 19. Nxg2 Ne8 20. f5 c4 21. bxc4 Rbc8 22. Nd5 Bc5+ 23. Kh1 Qc6 24. Ngf4 $18 Nc7 25. Qf3 Qe8 26. Qg4 b5 27. Nf6+ 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.9"]
[White "Ayala Ruiz, Miguel Angel"]
[Black "Gimenez Aguirre, Alejo Ismael"]
[Result "0-1"]
[ECO "B34"]
[WhiteElo "1444"]
[BlackElo "2247"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,64,-34,-86,-60,-67,-68,-101,-76,-181,-177,-203,-219,-212,-220,-215,-202,-252,-180,-181,-172,-281,-188,-187,-143,-173,-166,-187,-179,-232,-184,-275,-281,-564,-558,-552,-547,-597,-569,-737,-741,-821,-791,-29964,-29964,-5498,-5231]} 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. Nc3 Nc6 6. Be3 Nf6 7. f3 O-O 8. Qd2 d5 9. exd5 Nxd5 10. Nxc6 bxc6 11. Bd4 ({White should play} 11. Nxd5 $15 cxd5 12. c3) 11... e5 {B34: Sicilian: Accelerated Dragon with 5 Nc3: sidelines} (11... Bxd4 12. Qxd4 e5 13. Qd2 Nxc3 14. Qxc3 e4 15. f4 Bg4 16. h3 Qh4+ 17. g3 Qh5 18. Bg2 Be6 19. Qe5 Bf5 20. O-O {0-1 (53) Bruedigam,M (2312)-Rosenthal,D (2401) Germany 2014}) 12. Bc5 Re8 {White must now prevent ...e4!} 13. Ne4 f5 {Black is better.} 14. Nd6 {[#]} (14. O-O-O $17) 14... Bf8 $1 $19 15. c4 $146 ({Predecessor:} 15. Bc4 Be6 16. Bxd5 Bxd5 17. Nxe8 Bxc5 18. c4 Bxc4 19. Qc3 {0-1 (31) Velez Saavedra,A (1998)-De Nacimiento Montano,A (2134) Spain 2009}) 15... Bxd6 16. Bxd6 Qxd6 17. cxd5 cxd5 18. Bc4 Bb7 {aiming for ...e4.} 19. Rd1 {[%cal Rc4d5]} Rad8 20. Bb3 (20. Qa5 $142) 20... Qb6 {Threatens to win with ...e4.} 21. Qf2 Qxf2+ 22. Kxf2 Kf7 23. Rhe1 {[#]} Kf6 $1 24. h4 (24. f4 $142) 24... h6 25. g4 (25. Rc1 {was necessary.}) 25... d4 26. a3 $2 (26. Kg3) 26... fxg4 27. fxg4 e4 28. Kg3 Ke5 29. Bc4 Rf8 30. Re2 {[#]} d3 $1 {[%mdl 576] Decoy} 31. Rxd3 (31. Bxd3 Rf3+) 31... Rxd3+ 32. Bxd3 Rf3+ {[%mdl 64] Double Attack. Accuracy: White = 11%, Black = 88%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.10"]
[White "Cosme Contreras, Trilce"]
[Black "Araoz Andrade, Ivan Alexander"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2051"]
[BlackElo "1843"]
[Annotator "NA RC"]
[PlyCount "63"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Rb1 O-O 9. Be2 cxd4 10. cxd4 Qa5+ 11. Bd2 Qxa2 12. O-O Nc6 13. d5 Ne5 14. Nxe5 Bxe5 15. Bb4 Bf6 16. f4 Rd8 17. Bf3 a5 18. Bc5 e5 19. Qc1 $11 (19. Bb6 $14 Re8 20. f5) 19... Qa4 20. Qa3 Qe8 21. Bb6 Rd6 22. Qc5 Qe7 23. Bc7 Rd7 24. d6 Qe6 25. f5 Qa2 26. Rbe1 g5 27. Be2 a4 28. Bc4 Qd2 29. Rd1 Rxc7 30. Qxc7 Qe3+ 31. Kh1 b5 32. Qxf7+ 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.11"]
[White "Allo Collante, Enrique"]
[Black "Melian, Juan Sebastian"]
[Result "0-1"]
[ECO "B14"]
[WhiteElo "1595"]
[BlackElo "1786"]
[Annotator "NA RC"]
[PlyCount "54"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. c4 e6 2. Nc3 Nf6 3. Nf3 c5 4. e3 Nc6 5. d4 cxd4 6. exd4 d5 7. Bf4 Bd6 8. Bxd6 Qxd6 9. c5 Qe7 10. Bb5 O-O 11. O-O Bd7 12. Re1 b6 13. Bxc6 Bxc6 14. Ne5 Qb7 15. Nxc6 Qxc6 16. b4 bxc5 17. bxc5 Rab8 18. Qd3 Nd7 19. f4 Rfc8 20. Rac1 Rb4 21. Kh1 g6 22. Red1 Rc4 23. Rb1 Rb8 24. Rxb8+ Nxb8 25. Rb1 Na6 26. a3 Kg7 27. Nb5 Qxb5 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.15"]
[Round "7.12"]
[White "Menacho Admen, Victor Gabriel"]
[Black "Avalos Sanabria, Augusto Alfredo"]
[Result "0-1"]
[ECO "B70"]
[WhiteElo "1103"]
[BlackElo "1474"]
[Annotator "NA RC"]
[PlyCount "168"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Bc4 Bg7 7. Nf3 Nc6 8. O-O h6 9. Re1 O-O 10. h3 a6 11. b3 b5 12. Bd3 Bb7 13. Bb2 Rc8 14. Qd2 Qd7 15. Nd5 Nxd5 16. Bxg7 Kxg7 17. exd5 Nd8 18. c4 e6 19. Be2 f5 20. a4 bxc4 21. bxc4 Nf7 22. Bf1 e5 23. Qd3 Kh7 24. Nh4 e4 25. Qg3 g5 26. Nxf5 Qxf5 27. Rad1 Rce8 28. f3 Qf4 29. Qxf4 gxf4 30. Rxe4 Rxe4 31. Bd3 Ne5 32. fxe4 Nxd3 33. Rxd3 Re8 34. Rb3 Re7 35. Kf2 Kg6 36. g3 Rf7 37. Kg2 fxg3 38. Rb6 Kg5 39. Kxg3 Rd7 40. h4+ Kf6 41. c5 Rg7+ 42. Kf3 Ke5 43. Rxd6 Kd4 44. c6 Bc8 45. Rxh6 Rf7+ 46. Kg3 Kxe4 47. Rh8 Rc7 48. Rh5 Bf5 49. Rg5 a5 50. h5 Rc8 51. h6 Rh8 52. c7 Bc8 53. h7 Rxh7 54. Rg8 Rxc7 55. d6 Rc6 56. Rd8 Rc4 57. d7 Bxd7 58. Rxd7 Rxa4 59. Re7+ Kd3 60. Kf3 Kc2 61. Re2+ Kd1 62. Kf2 Ra3 63. Re1+ Kc2 64. Re2+ Kb3 65. Ke1 Ra1+ 66. Kf2 Ra2 67. Rxa2 Kxa2 68. Kf1 Kb2 69. Ke1 a4 70. Kd2 a3 71. Kd3 a2 72. Kd4 a1=Q 73. Kd5 Qa4 74. Kc5 Qe4 75. Kd6 Kc3 76. Kc7 Kc4 77. Kd6 Qf5 78. Kc6 Qd5+ 79. Kc7 Qe6 80. Kb7 Qd6 81. Ka7 Kb5 82. Ka8 Qd7 83. Kb8 Kc6 84. Ka8 Qb7# 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.1"]
[White "Zambrano Acebo, Jean Junior"]
[Black "Estrada Lavin, Cristian Alexand"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2174"]
[BlackElo "2116"]
[Annotator "NA RC"]
[PlyCount "108"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

{[%evp 12,92,0,12,0,0,8,32767,0,0,32767,-11,0,8,32767,26,65,86,94,20,28,-24,32767,32767,0,32767,6,32767,51,49,112,46,36,32767,32767,32767,32767,32767,35,33,3,36,35,40,37,32767,35,32767,32767,32767,32767,32767,32767,32767,32767,32767,3,0,19,4,0,0,0,4,12,8,2,12,6,8,8,0,0,0,21,32767,17,8,20,16,52,48,62]} 1. e4 {[%emt 0:00:30]} c5 {[%emt 0:00:30]} 2. d4 {[%emt 0:00:30]} cxd4 {[%emt 0:00:30]} 3. c3 {[%emt 0:00:30]} Nf6 {[%emt 0:02:30]} 4. e5 {[%emt 0:01:30]} Nd5 {[%emt 0:00:30]} 5. Qxd4 {[%emt 0:00:30]} e6 {[%emt 0:00:30]} 6. Nf3 {[%emt 0:01:30]} Nc6 {[%emt 0:01:30]} 7. Qe4 {[%emt 0:01:30]} d6 {[%emt 0:03:30]} 8. Nbd2 {[%emt 0:03:30]} Be7 {[%emt 0:12:30]} 9. Nc4 {[%emt 0:09:30] B22: Sicilian: 2 c3} (9. exd6 Qxd6 10. Nc4 Qc7 11. Bd3 f5 12. Qe2 O-O 13. O-O Bf6 14. Re1 Bd7 15. Nce5 Rae8 16. Nxc6 bxc6 {1-0 (58) Richter,W (2399)-Ginsburg,G (2526) Germany 2010}) 9... dxe5 {[%emt 0:04:30]} 10. Ncxe5 {[%emt 0:11:30]} Nxe5 {[%emt 0:00:30]} 11. Nxe5 {[%emt 0:13:30]} O-O {[%emt 0:02:30]} 12. Bd3 {[%emt 0:00:30]} Nf6 {[%emt 0:01:30]} 13. Qe2 {[%emt 0:09:30]} Qd5 $146 {[%emt 0:08:30]} ({Predecessor:} 13... Qc7 14. Bg5 b6 15. O-O Bb7 16. Rad1 Rad8 17. Rd2 Rd5 18. f4 Bc5+ 19. Kh1 Nd7 20. c4 Rd4 21. b4 f6 22. Nxd7 Qxd7 23. bxc5 fxg5 24. cxb6 gxf4 25. bxa7 {0-1 (35) Besner,B (2153)-Koch,M (2217) Bad Neustadt 2003}) 14. O-O {[%emt 0:05:30]} b6 {[%emt 0:24:30]} 15. c4 {[%emt 0:28:22]} (15. Rd1 $5 {[%cal Rd3h7]} Qc5 16. Bb5 $14) 15... Qc5 {[%emt 0:03:30]} 16. b4 {[%emt 0:04:46]} Qc7 {[%emt 0:03:30]} 17. a3 {[%emt 0:00:10]} Bb7 {[%emt 0:04:30]} 18. Bf4 {[%emt 0:02:21]} Bd6 {[%emt 0:00:30]} 19. Rac1 {[%emt 0:00:18]} Nd7 {[%emt 0:08:24]} (19... Rfd8 $11) 20. Nxd7 $1 {[%emt 0:00:47]} ({Not} 20. Qh5 $2 g6 $19) 20... Qxd7 {[%emt 0:00:16] [#]} (20... Bxf4 $14 21. Nxf8 Rxf8) 21. Rfd1 {[%emt 0:01:11]} (21. Bxh7+ $1 $16 {[%mdl 512]} Kxh7 22. Qd3+ {[%mdl 64] Double Attack} Kg8 23. Bxd6) 21... Qc6 {[%emt 0:00:54]} 22. Be4 {[%emt 0:01:14]} Qxe4 {[%emt 0:00:09]} 23. Qxe4 {[%emt 0:00:04]} Bxe4 {[%emt 0:00:07]} 24. Bxd6 {[%emt 0:00:03]} Rfd8 {[%emt 0:01:08]} 25. Be7 {[%emt 0:00:20]} Rxd1+ {[%emt 0:02:42]} 26. Rxd1 {[%emt 0:00:01]} Bc6 {[%emt 0:01:13]} 27. b5 {[%emt 0:01:42]} Be8 {[%emt 0:00:12]} 28. f4 {[%emt 0:00:48]} f6 {[%emt 0:01:21]} 29. Rd6 {[%emt 0:01:51]} Kf7 {[%emt 0:00:54]} 30. Rd8 {[%emt 0:00:07]} Rxd8 {[%emt 0:00:11]} 31. Bxd8 {[%emt 0:00:00]} e5 {[%emt 0:01:41]} 32. fxe5 {[%emt 0:00:57]} fxe5 {[%emt 0:00:01]} 33. Kf2 {[%emt 0:00:08]} Ke6 {[%emt 0:02:01]} 34. Ke3 {[%emt 0:00:06]} Kd6 {[%emt 0:01:01]} 35. Kd3 {[%emt 0:00:17]} Bg6+ {[%emt 0:02:17]} 36. Kc3 {[%emt 0:00:04]} Be4 {[%emt 0:00:03]} 37. g3 {[%emt 0:00:05]} h6 {[%emt 0:00:11]} 38. g4 $1 {[%emt 0:02:32]} Bf3 {[%emt 0:02:17]} (38... Kd7 $5 39. Bh4 $8 g5 $14) 39. g5 {[%emt 0:00:25]} h5 {[%emt 0:00:54]} 40. g6 $1 {[%emt 0:00:47]} Be4 {[%emt 0:00:35]} 41. Kb4 {[%emt 0:00:30]} Bxg6 {[%emt 0:00:54]} 42. a4 {[%emt 0:00:27]} e4 {[%emt 0:02:00]} 43. Bg5 {[%emt 0:00:03]} Bf5 {[%emt 0:01:53]} 44. Be3 {[%emt 0:00:25]} Kc7 {[%emt 0:01:04]} 45. a5 {[%emt 0:00:46]} bxa5+ {[%emt 0:01:32]} 46. Kxa5 {[%emt 0:00:02]} Kb7 {[%emt 0:00:32]} 47. c5 {[%emt 0:00:22]} Bc8 {[%emt 0:00:11]} 48. c6+ {[%emt 0:00:33]} Ka8 {[%emt 0:00:41]} 49. Kb4 {[%emt 0:00:16]} Bg4 {[%emt 0:00:18]} 50. Kc5 {[%emt 0:01:24]} Bh3 {[%emt 0:00:34]} 51. Kd6 {[%emt 0:00:33]} Bf1 {[%emt 0:00:09]} 52. Kc5 {[%emt 0:00:40]} Bh3 {[%emt 0:00:02]} 53. Kd6 {[%emt 0:00:11]} Bf1 {[%emt 0:00:13]} 54. Kc5 {[%emt 0:00:42]} Bh3 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.2"]
[White "Cadilhac, Igor Tokuichi Kikuc"]
[Black "Cantero, Rodolfo"]
[Result "1-0"]
[ECO "C49"]
[WhiteElo "2288"]
[BlackElo "2059"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,91,14,8,13,8,11,-10,33,-6,-4,-42,-12,-24,-4,-18,-1,-4,0,-8,-4,-6,-6,-6,22,1,0,0,5,0,0,0,-6,-9,-14,-39,-26,-56,-8,-52,-57,-62,-38,-94,-55,-102,-54,-54,-57,-52,-11,-13,-14,-18,-32,-61,-62,-65,0,-63,-67,-70,-46,-76,0,-7,59,70,69,77,583,25,25,-183,261,241,1289,1214,2174,2234,2253,2031]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 Qe7 {C49: Four Knights: 4 Bb5 Bb4} (7... d6 8. Bg5 Qe7 9. Re1 a6 10. Ba4 Nd8 11. Bb3 Ne6 12. Bh4 Nf4 13. Nd2 b5 14. Nf1 Ng6 15. Bg3 c5 16. Ne3 Qc7 17. h4 Be6 18. h5 {0-1 (37) Artemiev,V (2709)-Andreikin,D (2719) St Petersburg 2018}) 8. Nd2 $146 ({Predecessor:} 8. Bg5 h6 9. Bh4 d6 10. Re1 Nd8 11. d4 Bg4 12. h3 Bxf3 13. Qxf3 Ne6 14. Rad1 g5 15. Bg3 Ng7 16. h4 a6 17. Bc4 b5 18. hxg5 hxg5 19. Bf1 {1-0 (38) Kogan,A (2541)-Lafuente,P (2524) San Sebastian 2009}) 8... a6 9. Ba4 Nd8 {The position is equal.} (9... b5 $5 10. Bb3 $8 d6 $11) 10. f4 exf4 $1 11. Bb3 Ne6 12. d4 d6 13. Ba3 c5 14. Qf3 Qc7 15. Bxe6 fxe6 16. e5 dxe5 17. Bxc5 Rf7 18. Nc4 exd4 19. cxd4 Nd5 20. Nd6 Rf8 $36 {[%mdl 2048] Black is more active.} 21. Qe4 b6 22. Ba3 {Hoping for c4.} b5 {...b4 is the strong threat.} 23. Bc5 (23. c4 $5 bxc4 24. Nxc4 $1 {[%mdl 512]} Qxc4 25. Rac1 $11) 23... Bd7 24. Rf3 Rad8 25. Qe5 Rf6 26. Raf1 Bc6 27. R1f2 $1 h6 28. h4 Rg6 29. h5 Rf6 30. g3 {[%cal Rg3f4]} fxg3 31. Rxf6 gxf2+ (31... Nxf6 $2 {loses.} 32. Qxe6+ Kh7 33. Rxf6 $18) 32. Rxf2 Nf6 $1 33. Qxe6+ Kh7 34. Qf5+ Kg8 ({Better is} 34... Kh8 $15 35. Qe5 Qd7) 35. Qe5 ({White should try} 35. Qe6+ $11 Kh7 36. Qf5+ Kg8 37. Qe6+) 35... Qd7 $15 36. Rf5 Kh7 37. Kf1 b4 (37... Rf8 $1 $17 {And now ...Ng4 would win.} 38. Ke2 Bd5) 38. Ke1 $11 Bb5 (38... Rf8 $11) 39. Kd2 $14 {Threatens to win with Rxf6.} Bc6 40. Kc1 {Strongly threatening Rxf6.} ({Of course not} 40. Bxb4 Ne4+ 41. Nxe4 Qxd4+ 42. Qxd4 Rxd4+ 43. Kc3 Rxe4 $11) 40... a5 $2 {[%mdl 8192]} (40... Rf8 $16 {lives longer.}) 41. Qg3 $2 (41. Rxf6 $18 gxf6 42. Qxf6) 41... Qe6 $11 {White must now prevent ...Ne4.} 42. Kb2 $2 (42. d5 $11 Bxd5 43. Re5) 42... Bd5 $4 {[%mdl 8192]} (42... Ne4 $19 {avoids the disaster.} 43. Qg6+ Qxg6 44. hxg6+ Kxg6) 43. Re5 $18 Qd7 $2 {[#]} (43... Rxd6 44. Qd3+ (44. Rxe6 Rxe6 45. Qd3+ Be4 $18) 44... Be4 45. Rxe6 Rxe6) 44. Qg6+ $1 {White is clearly winning.} Kg8 {[#]} 45. Nf5 $1 Kh8 {[#]} 46. Re7 $1 {[%mdl 512] Accuracy: White = 38%, Black = 40%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.3"]
[White "Benitez Galeano, Alejandro"]
[Black "Zapata Charles, Santiago"]
[Result "1/2-1/2"]
[ECO "D27"]
[WhiteElo "2052"]
[BlackElo "2322"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,106,29,22,18,32,24,12,16,13,9,27,20,14,15,43,32,38,18,25,25,26,22,33,26,61,35,63,42,31,29,31,24,32,33,33,37,42,30,37,34,34,34,34,34,35,37,39,38,44,31,40,33,37,22,24,0,41,17,17,17,18,9,10,8,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. O-O c5 6. d4 Nc6 7. dxc5 Qxd1 8. Rxd1 Bxc5 9. a3 a6 10. b4 Be7 11. Bb2 O-O 12. Nbd2 {D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4} b5 (12... Bd7 13. Be2 Rfd8 14. Nc4 Be8 15. Nd4 Nxd4 16. Bxd4 Bb5 17. Bf1 Rac8 18. Na5 Bxf1 19. Kxf1 Rc7 {1-0 (62) Adhiban,B (2671)-Van Foreest,J (2609) Hoogeveen 2017}) 13. Bd3 Bb7 14. Rac1 Rfd8 15. Nb3 Rac8 $146 ({Predecessor:} 15... Rd5 16. Nfd4 Rad8 17. Be2 Nxd4 18. Rxd4 Rxd4 19. Bxd4 {1-0 (37) Abdulla,A (2350)-Ghorbani,M (2430) Teheran 1998}) 16. Nc5 Bxc5 17. Rxc5 Ne4 18. Rcc1 Nd6 19. Bc3 Ne7 20. Nd2 Nd5 21. Bd4 Rxc1 22. Rxc1 Rc8 23. Bc5 (23. Rxc8+ {is more complex.} Bxc8 24. g3 Nf6 25. f4 Nd7 26. Ne4) 23... Nf6 24. Nb3 Nde4 25. Bd4 Rxc1+ 26. Nxc1 Nd7 27. f3 Nd6 28. e4 e5 29. Bf2 Bc8 30. Kf1 Nb8 31. Nb3 Nb7 32. Ke1 Be6 33. Nc5 Nxc5 34. Bxc5 $14 {[%mdl 4096] Endgame KBB-KBN} Nd7 35. Ba7 Kf8 36. Kd2 Ke7 37. Kc3 Kd6 38. a4 Kc6 39. axb5+ axb5 {The position is equal.} 40. Bf2 Nb6 41. Bg3 f6 42. f4 Na4+ 43. Kc2 exf4 44. Bxf4 Bc4 45. Be3 Nb2 46. Bxc4 Nxc4 $11 {KB-KN} 47. Bf4 g5 48. Bd2 Kd6 {Black wants to play ...Ke5.} 49. Kd3 Ne5+ 50. Kd4 Nc6+ 51. Kd3 Ne5+ 52. Kd4 Nc6+ 53. Kd3 Ne5+ {Accuracy: White = 56%, Black = 59%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.4"]
[White "Munoz, Francisco Javier"]
[Black "Coro, Lucas"]
[Result "0-1"]
[ECO "E90"]
[WhiteElo "2308"]
[BlackElo "2315"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,72,47,18,50,44,48,34,54,0,12,-30,-17,-5,-1,-87,-82,-90,-74,-89,-79,-102,-88,-140,-108,-135,-131,-154,-142,-201,-200,-219,-225,-268,-252,-234,-204,-322,-319,-312,-319,-324,-323,-318,-275,-310,-282,-283,-262,-232,-252,-483,-485,-715,-694,-735,-720,-987,-979,-866,-824,-2427,-1279]} 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e4 d6 6. h3 Na6 7. Be3 c6 {E90: King's Indian: Classical: Early deviations and 6 h3} 8. Be2 e5 9. d5 Nh5 {White is slightly better.} 10. Nd2 Nf4 11. Bf1 f5 $1 12. g3 Ne6 13. dxe6 $146 {[#]} (13. exf5 $1 $11 {keeps the balance.} Nd4 14. fxg6) ({Predecessor:} 13. exf5 gxf5 14. dxe6 f4 15. Nde4 fxe3 16. fxe3 Bxe6 17. Qxd6 Qxd6 18. Nxd6 {0-1 (47) Esipenko,A (2509)-Giri,A (2785) Sochi 2017}) 13... f4 $1 $17 {[%cal Rf4e3]} 14. Qe2 fxe3 15. Qxe3 Nc5 16. Be2 Nxe6 17. Bg4 (17. h4 $142) 17... a6 18. O-O-O b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 19. h4 {[#]} h5 $1 {[%cal Rh5g4]} 20. Bxe6+ (20. Bh3 $17 {is a better defense.}) 20... Bxe6 $19 21. f4 b4 22. Na4 exf4 23. gxf4 Bg4 24. c5 (24. Rdf1 {was worth a try.}) 24... Bxd1 25. Rxd1 Qxh4 26. cxd6 Qxf4 27. Qxf4 Rxf4 28. Nc5 Bh6 {White must now prevent ...Rd8.} 29. Kb1 h4 30. d7 h3 31. Nc4 $2 (31. e5 {was called for.} Rd4 {[%mdl 64] Discovered Attack} 32. e6) 31... h2 {aiming for ...Rg4.Black is clearly winning.} 32. Ne5 (32. Kc2 $142 Bg5 33. Rh1) 32... Bf8 33. Nxa6 {intending Nc7.} Rd8 {Threatens to win with ...Bg7.} ({Weaker is} 33... Rh4 34. Rh1 $17) 34. Nb8 Rxb8 35. Nxc6 Ra8 36. Na7 Rd8 {Accuracy: White = 31%, Black = 84%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.5"]
[White "Vazquez, Facundo"]
[Black "Donoso Diaz, Sebastian"]
[Result "0-1"]
[ECO "D20"]
[WhiteElo "2086"]
[BlackElo "2251"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,52,41,36,29,37,31,38,38,38,38,36,35,42,36,33,27,36,28,21,15,38,-35,-17,-73,-70,-93,-97,-77,-97,-157,-164,-186,-185,-196,-196,-208,-208,-197,-157,-313,-311]} 1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 exd4 5. Bxc4 Nc6 6. O-O Be6 7. Bb5 Bc5 8. b4 {D20: Queen's Gambit Accepted: 3 e3 and 3 e4} Bb6 $1 9. a4 {[%cal Ba2a4,Ba4a5][%mdl 32] And now a5 would win.} a6 10. Bxc6+ $1 {White is slightly better.} bxc6 11. a5 Ba7 12. Bb2 {[%cal Rb2d4]} Nf6 13. Bxd4 Nxe4 14. Bxa7 Qxd1 15. Rxd1 {Be3 is the strong threat.} Rxa7 {[#]} 16. Nd4 $146 Bd5 17. Nf5 (17. Nd2 $14 Nd6 18. Rac1) 17... Kd7 18. Ne3 (18. Nxg7 $11 Rb7 19. f3) 18... Rb8 $17 19. Nxd5 cxd5 20. Rxd5+ {[#]} Nd6 $1 21. Rd4 (21. Nc3 $142) 21... Rab7 22. Ra4 {[#]} c5 $1 {[%cal Rc5d4][%mdl 512]} 23. Rd1 (23. bxc5 Rxb1+) 23... Rxb4 24. Ra1 Kc6 25. Nc3 Nb5 26. Na4 $2 {[#]} (26. Nd5 $17 {might work better.}) 26... Rxa4 $1 {[%mdl 512] Accuracy: White = 43%, Black = 71%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.6"]
[White "Aguilar, Luis Miguel"]
[Black "Mayeregger, Arnold"]
[Result "*"]
[WhiteElo "2193"]
[BlackElo "1913"]
[Annotator "TA"]
[PlyCount "40"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,17,12,15]} 1. g3 c5 2. Bg2 g6 3. e4 Bg7 4. Ne2 Nc6 5. c3 e5 6. d3 Nge7 7. Be3 d6 8. O-O O-O 9. f4 {Predecessor:} f5 $146 10. Nd2 Kh8 11. Nf3 fxe4 12. dxe4 Be6 13. Qd2 Qc7 14. Ng5 Bg8 15. Bh3 Rf6 16. f5 h6 17. Ne6 Bxe6 18. fxe6 Ng8 19. Rxf6 Nxf6 20. Bxh6 Nxe4 {½-½ (32) Bartel,M (2617)-Gashimov,V (2733) Warsaw 2010} *

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.6"]
[White "Aguilar, Luis Miguel"]
[Black "Mayeregger, Arnold"]
[Result "1/2-1/2"]
[ECO "B20"]
[WhiteElo "2193"]
[BlackElo "1913"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,114,23,5,4,0,0,-28,-10,-12,0,-41,-43,-134,-135,-134,-131,-146,-139,-150,-130,-160,-151,-150,-125,-199,-74,-79,-91,-99,-89,-118,-112,-112,-15,-232,-240,-244,-200,-264,-231,-219,-189,-209,-162,-220,-223,-227,-204,-533,-539,-536,-526,-1033,-987,-760,-883,-893,2489,-29973,1856,-29989,-801,-781,-755,-970,-750,-702,-609,-678,-333,-629,-8,-8,-8,-8,-8,-8,-8,-8,0,-10,-10,-19,0,0,0,-21,-21,-21,-21,-21,-21,-21,-21,-16,-15]} 1. g3 c5 2. Bg2 g6 3. e4 Bg7 4. Ne2 Nc6 5. c3 e5 6. d3 Nge7 7. Be3 d6 8. O-O O-O 9. f4 f5 10. Nd2 Kh8 11. Nf3 b6 {B20: Sicilian: Unusual White 2nd moves} (11... fxe4 12. dxe4 Be6 13. Qd2 Qc7 14. Ng5 Bg8 15. Bh3 Rf6 16. f5 h6 17. Ne6 Bxe6 18. fxe6 Ng8 19. Rxf6 Nxf6 20. Bxh6 Nxe4 {½-½ (32) Bartel,M (2617)-Gashimov,V (2733) Warsaw 2010}) 12. Rb1 Be6 13. a3 $146 ({Predecessor:} 13. a4 Qd7 14. b4 cxb4 15. cxb4 Ba2 16. b5 Nd4 17. Rb2 Nxf3+ 18. Bxf3 Be6 19. Rd2 {0-1 (55) Kravtsov,S (2245)-Iskusnyh,S (2460) Novosibirsk 1996}) 13... a5 {Black has an edge.} 14. Ng5 Bg8 15. fxe5 dxe5 16. b4 (16. c4 $15) 16... axb4 17. axb4 cxb4 18. cxb4 Ra3 $1 19. Nc1 h6 20. Nh3 Nd4 21. Qd2 Kh7 22. Qb2 {[#]} (22. b5 $17) 22... Ra7 (22... Nb5 $1 $19 {has better winning chances.} 23. Qd2 Nc3) 23. Bxd4 $17 exd4 24. Nf4 Qd6 25. exf5 Nxf5 26. Be4 Bf7 ({Black should try} 26... Ne3 $17 27. Nb3 Nxf1 28. Nxg6 Rf6 29. Nf4+ Kh8 30. Rxf1 Qxb4) 27. b5 $2 (27. Bxf5 $1 $11 {and White has nothing to worry.} gxf5 28. Qf2) 27... Ne3 $19 28. Re1 Kg8 29. Nb3 Rc7 30. Rec1 Rc3 31. Nd2 Rfc8 32. Bc6 (32. Nf1 $142) 32... g5 33. Ne4 Qe5 34. Ne2 $2 (34. Nh3) 34... Rxd3 {...Rxc6! is the strong threat.} 35. Nf2 Rb3 36. Qd2 Rxb1 37. Rxb1 {[#]} Rxc6 $1 {[%mdl 512]} 38. bxc6 Qe4 $4 {[%mdl 8192]} (38... Qd5 $19 39. Nf4 gxf4) 39. Nf4 $4 {[%mdl 8192]} (39. Nxe4 $18 Nd5 40. Nxd4) 39... gxf4 $4 {[%mdl 8192]} (39... Qxb1+ {and all is fine.} 40. Nd1 gxf4 41. Qe1 Be5 42. Qe2 Nxd1 43. gxf4 Ne3+ 44. Kf2 Bf6 45. Qxe3 dxe3+ 46. Kf3 Bh5+ 47. Kg2 Qb2+ 48. Kh3 Qf2 49. c7 Qf3#) 40. Nd3 $4 {[%mdl 8192]} (40. Nxe4 $18 b5 41. c7) 40... Qxc6 (40... Bd5 $142 41. Qb2 fxg3 42. hxg3 Ng4 43. Kf1 Qxd3+ {[%mdl 64] Double Attack} 44. Qe2 Qxb1+ 45. Qe1 Bc4+ 46. Kg2 Qxe1 47. Kf3 Ne5+ {[%mdl 64] Double Attack} 48. Kf4 Qe3+ 49. Kf5 Qf3#) 41. Nxf4 b5 42. Qa5 Qc2 43. Qxb5 Nd1 44. Qd3 Qf2+ 45. Kh1 {[#]} Qe1+ $2 ({Better is} 45... Qxf4 $1 $19 {[%mdl 512]} 46. gxf4 Nf2+ {[%mdl 64] Double Attack} 47. Kg2 Nxd3) 46. Kg2 $11 {The position is equal.} Ne3+ (46... Qf2+ $2 47. Kh3 $19) 47. Kf3 $132 {[%mdl 2048] White puts up resistance} Qa5 $1 48. Rb8+ Bf8 {Threatens to win with ...Bd5+.} 49. Qxd4 Nf5 50. Qd8 Qa3+ 51. Kg4 Ne3+ 52. Kh4 Qc5 {Strongly threatening ...Be8!} 53. Qxf8+ (53. Rc8 {feels hotter.} Qb4 54. Rb8 Qc5) 53... Qxf8 54. Rxf8+ Kxf8 55. g4 $1 Nf1 56. g5 hxg5+ 57. Kxg5 Nxh2 {Accuracy: White = 35%, Black = 54%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.7"]
[White "Gimenez Aguirre, Alejo Ismael"]
[Black "Heinechen, Juan"]
[Result "1-0"]
[ECO "B36"]
[WhiteElo "2247"]
[BlackElo "2123"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,77,0,0,35,33,54,50,50,20,49,44,50,51,58,50,55,21,28,28,40,39,43,27,102,4,4,12,0,1,13,0,14,-3,18,19,22,0,42,16,76,77,44,58,54,74,54,54,334,307,345,347,346,310,952,949,755,784,855,824]} 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Nf6 6. Nc3 d6 7. Be2 Nxd4 8. Qxd4 Bg7 9. f3 O-O 10. Bg5 Be6 11. Qd2 a5 {B36: Sicilian: Maroczy Bind: Gurgenidze System} 12. Rc1 Nd7 (12... a4 13. Rc2 Nd7 14. Nb5 Ne5 15. O-O Nc6 16. Rd1 Qa5 17. Qxa5 Rxa5 18. Bf1 Rc8 19. Bd2 {0-1 (69) Kotronias,V (2564)-Mamedov,R (2647) Warsaw 2013}) 13. h4 $146 ({Predecessor:} 13. Nd5 Bxd5 14. cxd5 Qb6 15. Be3 Nc5 16. b3 Qb4 17. Rc4 Qxd2+ 18. Kxd2 b6 19. Rc2 f5 20. Bd3 f4 21. Bf2 g5 22. h3 Be5 23. Bb5 Ra7 24. Rb1 {½-½ (24) Ridge,M (1917)-Orr,M (2260) Edinburgh 2015}) 13... h5 {White is slightly better.} 14. Nb5 Nc5 15. O-O Re8 16. b3 Qb6 17. Be3 Bd7 18. Nc3 Bc6 19. Nd5 Bxd5 20. cxd5 Rec8 21. Rc2 Be5 (21... Bh6 $11 {keeps the balance.}) 22. g4 ({White should play} 22. f4 $16 Bg7 23. Rc4) 22... Bf4 $1 $11 {[#] Threatens to win with ...Nxb3.} 23. Rfc1 Bxe3+ 24. Qxe3 {Black must now prevent gxh5.} hxg4 25. fxg4 a4 {[%cal Ra4b3]} 26. Bc4 (26. h5 {seems wilder.} axb3 27. axb3 Rf8 28. Rc3 Ra2 29. Bd3) 26... Nd7 27. Qxb6 Nxb6 28. b4 a3 29. Bb5 Kg7 (29... Rxc2 $11 30. Rxc2 f5) 30. Rxc8 Rxc8 31. Rxc8 Nxc8 $16 {[%mdl 4096] Endgame KB-KN} 32. g5 $1 Nb6 33. Kf2 f5 $2 {[%mdl 8192] [#]} (33... Kf8 $14) 34. Ke3 $18 fxe4 35. Kxe4 Kf7 36. Kd4 e5+ $2 (36... Kg7 37. Bd3 Kf7) 37. dxe6+ $1 {White is clearly winning.} Kxe6 38. Bd3 Kf7 39. Be4 {Accuracy: White = 58%, Black = 27%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.8"]
[White "Suarez, Pedro"]
[Black "Melian, Juan Sebastian"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2077"]
[BlackElo "1786"]
[Annotator "NA RC"]
[PlyCount "43"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. g3 O-O 6. Bg2 Bxd2+ 7. Nbxd2 Qe7 8. O-O d6 9. Qc2 e5 10. e3 c6 11. c5 dxc5 {dx} 12. dxe5 Nfd7 13. Qe4 $14 Re8 14. Rac1 Nxe5 15. Nxe5 Qxe5 16. Qxe5 Rxe5 17. Nc4 Re8 18. Nb6 Ra6 19. Nxc8 Rxc8 20. Bh3 Re8 21. Rxc5 Rb6 22. Rb1 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.9"]
[White "Gomez Barrera, Gonzalo Andres"]
[Black "Cosme Contreras, Trilce"]
[Result "1/2-1/2"]
[ECO "E90"]
[WhiteElo "2058"]
[BlackElo "2051"]
[Annotator "NA RC"]
[PlyCount "83"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. Be3 c5 7. Nf3 Qa5 {E90: King's Indian: Classical: Early deviations and 6 h3} 8. Bd3 Nc6 {[#]} 9. O-O (9. d5 $1 $16) 9... Nd7 10. d5 Nd4 11. Bxd4 $146 ({Predecessor:} 11. Bd2 Nxf3+ 12. Qxf3 Ne5 13. Qe2 a6 14. Bc2 b5 15. cxb5 axb5 16. Nxb5 {½-½ (44) Perez Ponsa,F (2583)-Vovk,A (2633) chess.com INT 2017}) 11... cxd4 12. Nb5 Qb6 13. Rb1 a6 14. Na3 e5 15. dxe6 fxe6 16. b4 Ne5 17. Nxe5 Bxe5 18. c5 dxc5 19. Nc4 Qc7 20. bxc5 Qxc5 21. Nb6 Rb8 22. Qb3 $11 Qd6 23. Bc4 Re8 24. f4 Bxf4 25. Rxf4 Qxf4 26. Nxc8 Rbxc8 27. Bxe6+ Kh8 28. Bxc8 Rxc8 29. Qxb7 Qe3+ 30. Kh1 Re8 31. Rf1 d3 32. Rf7 Qh6 33. Qd7 Rf8 34. Rxf8+ Qxf8 35. Qxd3 Qc5 36. Qd8+ Kg7 37. Qd7+ Kf6 38. Qd8+ Ke5 39. Qg5+ Kd4 40. Qd2+ Kxe4 41. Qe2+ Qe3 42. Qxa6 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.10"]
[White "Orrego Palermo, Marcelo"]
[Black "Allo Collante, Enrique"]
[Result "1/2-1/2"]
[ECO "D13"]
[WhiteElo "1632"]
[BlackElo "1595"]
[Annotator "NA RC"]
[PlyCount "62"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Bf4 e6 6. e3 Nc6 7. Bd3 Be7 8. Nf3 O-O 9. O-O a6 10. Na4 Re8 11. Qb3 Nd7 12. Rfc1 Qa5 13. a3 h6 14. Qc2 Qd8 15. b4 e5 16. Bxe5 Ndxe5 17. dxe5 Bf8 18. Rd1 Nxe5 19. Be2 Bd7 20. Nxe5 Rxe5 21. Nc3 Bc6 22. Bf3 Rc8 23. Qb3 Qf6 24. Nxd5 Qg6 25. e4 Rg5 26. Rac1 Bd6 27. Qe3 Re8 28. Qd3 Qe6 29. Ne3 Bf4 30. Rc3 Be5 31. Rcc1 Bf4 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.11"]
[White "Avalos Sanabria, Augusto Alfredo"]
[Black "Ayala Ruiz, Miguel Angel"]
[Result "1-0"]
[ECO "B41"]
[WhiteElo "1474"]
[BlackElo "1444"]
[Annotator "NA RC"]
[PlyCount "117"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Qc7 7. Be3 Bb4 8. f3 b6 9. Qb3 Be7 10. Be2 d6 11. f4 Bb7 12. Qc2 Nbd7 13. b4 O-O 14. O-O Rac8 15. Rac1 Rfe8 16. Rf3 d5 17. cxd5 exd5 18. Nxd5 Nxd5 19. exd5 Qxc2 20. Rxc2 Bxd5 21. Rxc8 Rxc8 22. Rg3 Bxb4 23. Bxa6 Ra8 24. Bb5 Nf6 25. Nc2 Bd6 26. a4 Bb3 27. Ne1 Nd5 28. Bxb6 Bxa4 29. Bxa4 Nxb6 30. Bb3 Ra1 31. Kf1 Bxf4 32. Rf3 Bd2 33. Bxf7+ Kh8 34. Rd3 Rxe1+ 35. Kf2 g6 36. Rxd2 Re7 37. Ba2 Kg7 38. g4 Nd7 39. g5 Nc5 40. Rd5 Ne4+ 41. Kf3 Nc3 42. Ra5 Re2 43. Ra7+ Kf8 44. Ra8+ Ke7 45. Ra7+ Kd6 46. Bg8 Rxh2 47. Bxh7 Rh5 48. Kg4 Nd5 49. Bxg6 Rh1 50. Be4 Rg1+ 51. Kh5 Nf4+ 52. Kh6 Ne6 53. g6 Rg4 54. Bf3 Rf4 55. Bh5 Rf8 56. Kh7 Rf5 57. Bg4 Nf8+ 58. Kg7 Ne6+ 59. Kh6 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.16"]
[Round "8.12"]
[White "Araoz Andrade, Ivan Alexander"]
[Black "Menacho Admen, Victor Gabriel"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "1843"]
[BlackElo "1103"]
[Annotator "NA RC"]
[PlyCount "45"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 Nc6 7. Qb3 {D35: Queen's Gambit Declined: Exchange Variation} (7. Bd3 O-O 8. Nge2 Nb4 9. Bb1 c6 10. Ng3 Na6 11. h4 c5 12. a3 cxd4 13. Qxd4 Re8 14. h5 h6 15. Bh4 Bc5 16. Qd3 d4 17. Bxf6 Qxf6 18. Nd5 {1-0 (18) Bru Rullo,L (2179)-Saldana Caballe,J (2061) Tarragona 2018}) 7... Be6 8. Qxb7 Bd7 $146 ({Predecessor:} 8... Rb8 9. Qxc6+ Bd7 10. Qa6 Ra8 11. Bb5 O-O 12. Bxd7 Qxd7 13. Nf3 Rfb8 14. Qa4 c6 {1-0 (32) Carstens Dobuchak,T (1838)-Weise,W Curitiba 2010}) 9. Qb3 Be6 10. Bb5 O-O 11. Bxc6 Rb8 12. Qc2 h6 13. Bxf6 Bxf6 14. Nf3 Qd6 15. Bb5 c6 16. Bd3 g6 17. O-O c5 18. b3 cxd4 19. exd4 Bg4 20. Ne5 Bxe5 21. dxe5 Qxe5 22. Rfe1 Qc7 23. Nxd5 $18 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.1"]
[White "Coro, Lucas"]
[Black "Zambrano Acebo, Jean Junior"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2315"]
[BlackElo "2174"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,107,41,64,42,50,29,41,39,27,33,40,49,86,95,125,130,148,158,153,161,232,242,237,234,277,257,240,193,220,197,333,193,279,264,283,274,251,103,311,299,289,282,657,637,773,765,763,756,1585,1572,1577,1574,1539,1517,1549,1489,1393,1387,29979,29980,29980,29981,29981,29981,29982,29982,29982,29983,29983,29984,29986,29985,29985,29986,29988,29986,29986,29987,29987,29988,29988,29989,29989,29990]} 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. c4 Nc6 6. Be3 Nf6 7. Nc3 O-O 8. Be2 d6 9. O-O Bd7 10. f3 Qb6 11. Ncb5 Nxd4 12. Bxd4 Qa5 13. Nc3 Be6 14. a3 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0} (14. Rc1 Rfc8 15. b3 a6 16. f4 b5 17. f5 Bd7 18. Bxf6 Bxf6 19. Nd5 Bg5 20. Rc3 e6 21. Rg3 Bh4 22. Rg4 {1-0 (30) Efimenko,Z (2651)-Korobov,A (2692) Rivne 2016}) 14... Nd7 15. f4 $146 ({Predecessor:} 15. Bxg7 Kxg7 16. Qd4+ f6 17. Nd5 Bxd5 18. exd5 Qb6 19. Qxb6 Nxb6 20. Kf2 Rfc8 21. b3 a5 {½-½ (42) Lautier,J (2465)-Milos,G (2510) Palma de Mallorca 1989}) 15... Rac8 16. b3 {[%cal Bb2b3,Bb3b4][%mdl 32] Strongly threatening f5!White is slightly better.} Bxd4+ 17. Qxd4 {aiming for f5!} Qc5 18. Qxc5 Nxc5 19. f5 Bd7 {[#]} 20. b4 $1 {[%cal Rb4c5]} Na4 21. Nd5 Rce8 {[#]} 22. f6 $1 {[%cal Rf6e7]} e6 (22... e5 $142 23. Rac1 Rd8) 23. Ne7+ $18 Kh8 24. Rac1 Rd8 25. Rfd1 Bc6 26. Bf3 a6 27. g4 Rd7 (27... Nb6 {was necessary.} 28. b5 axb5) 28. h4 (28. Nxc6 $142 bxc6 29. c5) 28... Rfd8 (28... Nb6 {is a better defense.} 29. b5 axb5) 29. Kf2 h6 30. Ke3 Nb6 31. Rd2 (31. Nxc6 $18 bxc6 32. c5 dxc5 33. Rxd7 (33. bxc5 Rxd1 34. Bxd1 Nd7 $14) 33... Nxd7 34. Rd1 (34. bxc5 Rb8 $11)) 31... d5 $2 (31... Ba4 $16) 32. cxd5 exd5 33. exd5 ({Not} 33. Nxc6 bxc6 34. Kf4 Rd6 $16) 33... Nxd5+ $2 (33... Bxd5 34. Nxd5 Nxd5+ 35. Bxd5 Rxd5 36. Rxd5 Rxd5) 34. Bxd5 Bxd5 35. Rcd1 Bc6 36. Rxd7 Rxd7 37. Rxd7 Bxd7 {[%mdl 4096] Endgame KB-KN} 38. g5 Be6 39. Kd4 Bg4 40. Kc5 Kh7 41. Kb6 hxg5 42. hxg5 {White mates.} Bf3 43. a4 Be4 44. a5 Bf3 45. Kc7 Kh8 46. Nc8 Kg8 47. Nd6 Kf8 48. Nxb7 Be2 49. Nd6 Bd3 50. Kb6 Be2 51. b5 axb5 52. a6 {[%cal Ba5a6,Ba6a7][%mdl 32]} Bf3 53. Nb7 Ke8 54. a7 {Accuracy: White = 73%, Black = 28%.} 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.2"]
[White "Zapata Charles, Santiago"]
[Black "Cadilhac, Igor Tokuichi Kikuc"]
[Result "1/2-1/2"]
[ECO "C24"]
[WhiteElo "2322"]
[BlackElo "2288"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,79,14,16,18,21,9,0,7,16,7,0,-13,-13,0,0,0,-39,-13,-29,-35,-44,-43,-30,-41,-33,-38,-43,-56,-49,-47,-70,-12,-43,-39,-50,-18,-48,-39,-52,-26,-25,-25,-21,-14,-23,-23,-42,-25,-44,-41,-54,-46,-68,-51,-72,-18,-40,-18,-29,-25,-20,-26,-15,-18,-43,0,-21,-4,-23,0,-7]} 1. e4 e5 2. Bc4 Nf6 3. d3 c6 4. Nf3 d5 5. Bb3 Bd6 6. exd5 Nxd5 {C24: Bishop's Opening: 2...Nf6} 7. O-O O-O 8. Re1 Bg4 9. h3 Bh5 $1 10. Nbd2 Nd7 {[%cal Bb8d7,Bd7c5,Bc5e6,Be6f4][%mdl 32]} 11. Ne4 Bc7 12. Ng3 Bg6 13. a3 {[#]} Kh8 $146 ({Predecessor:} 13... h6 14. d4 exd4 15. Qxd4 {0-1 (24) Tiviakov,S (2686)-Shirov,A (2726) Benidorm 2008}) 14. Bg5 f6 15. Bd2 Nc5 16. Ba2 Qd7 17. Nh4 Bf7 18. Ne4 Ne6 19. Qg4 Rad8 20. Nf5 {[#] aiming for Nc5!} Rg8 (20... g6 $15 21. Nh6 f5 {[%mdl 64] Double Attack}) 21. Nc3 Nef4 {White must now prevent ...Bh5.} 22. Nxd5 Nxd5 (22... cxd5 {feels hotter.} 23. Bxf4 h5 24. Qf3 Qxf5 25. Be3 Qg6) 23. Qf3 Be6 24. Ne3 Nf4 25. Bxe6 Nxe6 26. Bc3 Nf4 27. Rad1 Rge8 28. Nf1 Qd5 {next ...Qxf3 is good for Black.} 29. Qxd5 cxd5 30. d4 e4 31. Ne3 Kg8 32. h4 Kf7 (32... g6 $17) 33. g3 $11 Ne6 (33... Nh5 {is interesting.} 34. Bb4 a5 35. Bd2 g6 36. a4 f5) 34. b3 g6 35. Bb2 Bb6 36. Kg2 f5 37. f4 Re7 (37... exf3+ $5 38. Kxf3 Ba5 $11) 38. Re2 Red7 39. Red2 Ke8 40. h5 {Accuracy: White = 49%, Black = 58%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.3"]
[White "Cantero, Rodolfo"]
[Black "Donoso Diaz, Sebastian"]
[Result "0-1"]
[ECO "B40"]
[WhiteElo "2059"]
[BlackElo "2251"]
[Annotator "NA RC"]
[PlyCount "76"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 {[%emt 0:00:30]} c5 {[%emt 0:00:30]} 2. Nf3 {[%emt 0:00:00]} e6 {[%emt 0:00:30]} 3. b3 {[%emt 0:00:00]} a6 {[%emt 0:04:30]} 4. Bb2 {[%emt 0:00:00]} Nc6 {[%emt 0:01:30]} 5. Bd3 {[%emt 0:00:00]} (5. Be2 d5 6. exd5 exd5 7. d4 Nf6 8. O-O Be7 9. dxc5 O-O 10. c4 Bxc5 11. Nc3 dxc4 12. Bxc4 Bg4 13. Nd5 Nxd5 14. Bxd5 {0-1 (29) Vachier Lagrave,M (2795)-Grischuk,A (2750) chess.com INT 2017}) 5... d6 {[%emt 0:06:30]} 6. O-O {[%emt 0:00:30] B40: Sicilian: 2...e6, Unusual lines} e5 {[%emt 0:02:30]} 7. Nc3 {[%emt 0:00:30]} Nge7 $146 {[%emt 0:08:30]} ({Predecessor:} 7... Nf6 8. h3 Be6 9. Re1 Be7 10. Bf1 O-O 11. d3 {½-½ (59) Mestek,I (2198)-Kolaric,S (2070) Nova Gorica 2012}) 8. Re1 {[%emt 0:00:30]} h6 {[%emt 0:06:30]} 9. Bc4 {[%emt 0:01:30]} b5 {[%emt 0:03:30]} 10. Bd5 {[%emt 0:00:00]} Nxd5 {[%emt 0:07:30]} 11. Nxd5 {[%emt 0:00:00]} g6 {[%emt 0:09:30]} 12. d3 {[%emt 0:00:30]} Bg7 {[%emt 0:01:30]} 13. a4 {[%emt 0:01:30]} Rb8 {[%emt 0:01:30]} 14. Qd2 {[%emt 0:01:30]} O-O {[%emt 0:01:30]} 15. g3 {[%emt 0:01:30]} Be6 {[%emt 0:03:30]} 16. axb5 {[%emt 0:00:30]} axb5 {[%emt 0:00:30]} 17. c4 {[%emt 0:03:30]} Bg4 {[%emt 0:10:30]} 18. Nh4 {[%emt 0:01:30]} bxc4 {[%emt 0:01:30]} 19. bxc4 {[%emt 0:00:00]} Qg5 {[%emt 0:00:30]} 20. Ne3 {[%emt 0:14:00]} Nd4 {[%emt 0:03:30]} 21. Ra2 {[%emt 0:10:30]} Ra8 {[%emt 0:04:39]} 22. Bxd4 {[%emt 0:01:30]} cxd4 {[%emt 0:04:33]} 23. Nxg4 {[%emt 0:00:00]} Qxg4 {[%emt 0:00:39]} 24. Rea1 {[%emt 0:02:00]} Rxa2 {[%emt 0:00:13]} 25. Rxa2 {[%emt 0:00:30]} Rb8 {[%emt 0:00:40]} (25... Bf6 $5 {[%cal Rf6h4]} 26. Ng2 h5 $11) 26. f3 {[%emt 0:03:30]} Rb1+ {[%emt 0:01:12]} 27. Kg2 {[%emt 0:00:30]} Qc8 {[%emt 0:00:45]} 28. Rc2 {[%emt 0:10:30]} Qa6 {[%emt 0:02:00]} 29. Rc1 {[%emt 0:04:30]} Rb3 {[%emt 0:01:20]} 30. Qe2 {[%emt 0:14:30]} Bf6 {[%emt 0:01:03]} 31. Kh3 {[%emt 0:01:30]} Qa3 {[%emt 0:01:42]} 32. Rd1 {[%emt 0:00:30] [#]} Bg5 $1 {[%emt 0:02:00]} 33. Ng2 {[%emt 0:02:30]} Rb2 {[%emt 0:00:12]} 34. Qf1 {[%emt 0:00:00]} Be3 {[%emt 0:01:34]} 35. f4 {[%emt 0:07:03]} Rf2 {[%emt 0:01:34]} 36. Nxe3 {[%emt 0:05:27]} dxe3 {[%emt 0:01:39]} 37. Qg1 {[%emt 0:00:11]} exf4 {[%emt 0:01:27]} 38. gxf4 $19 {[%emt 0:00:08]} e2 {[%emt 0:01:10]} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.4"]
[White "Estrada Lavin, Cristian Alexand"]
[Black "Benitez Galeano, Alejandro"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2116"]
[BlackElo "2052"]
[Annotator "NA RC"]
[PlyCount "121"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. Nf3 {[%emt 0:00:30]} d5 {[%emt 0:12:30]} 2. b3 {[%emt 0:00:30]} Bg4 {[%emt 0:00:30]} 3. Ne5 {[%emt 0:03:30]} Bh5 {[%emt 0:04:30]} 4. d4 {[%emt 0:01:30]} (4. g4 Bg6 5. Nxg6 hxg6 6. Bg2 Qd6 7. h3 Nd7 8. Bb2 e5 9. d3 c6 10. Nd2 Be7 11. e3 f5 {1-0 (46) Harika,D (2539)-Guramishvili,S (2357) Teheran 2017}) 4... Nd7 {[%emt 0:02:30]} 5. Bb2 {[%emt 0:01:30]} e6 {[%emt 0:02:30]} 6. g3 {[%emt 0:03:30] A06: Réti Opening:1 Nf3 d5} Ngf6 {[%emt 0:06:30]} 7. Nxd7 {[%emt 0:01:30]} Qxd7 {[%emt 0:00:30]} 8. Bg2 $146 {[%emt 0:00:30]} ({Predecessor:} 8. Nd2 Qc6 9. c3 a5 10. a4 Qb6 11. Bg2 c5 12. O-O cxd4 13. cxd4 {1-0 (52) Boutteville,C-Gereben,E Bordeaux 1964}) 8... Be7 {[%emt 0:05:30]} 9. O-O {[%emt 0:00:30]} O-O {[%emt 0:00:30]} 10. Nd2 {[%emt 0:02:30]} a5 {[%emt 0:03:30]} 11. c4 {[%emt 0:08:30]} a4 {[%emt 0:04:30]} 12. f3 {[%emt 0:20:30]} c5 {[%emt 0:09:30]} 13. Kh1 {[%emt 0:01:30]} Rfd8 {[%emt 0:03:30]} 14. e3 {[%emt 0:09:30]} Bg6 {[%emt 0:04:30]} 15. Qe2 {[%emt 0:01:30]} b5 {[%emt 0:07:30]} 16. cxb5 {[%emt 0:15:30]} Rdb8 {[%emt 0:01:30]} 17. dxc5 {[%emt 0:02:30]} Rxb5 {[%emt 0:02:30]} 18. c6 {[%emt 0:01:30]} Qxc6 {[%emt 0:00:30]} 19. Rfc1 {[%emt 0:01:30]} Qd7 {[%emt 0:06:30]} 20. Be5 {[%emt 0:01:46]} Rb7 {[%emt 0:00:33]} 21. bxa4 {[%emt 0:02:37]} Ba3 {[%emt 0:00:41]} 22. Re1 {[%emt 0:02:25]} Qxa4 {[%emt 0:00:46]} 23. Nb3 {[%emt 0:00:45]} Nd7 {[%emt 0:00:55]} 24. Bb2 {[%emt 0:03:10]} Bd3 {[%emt 0:03:19]} 25. Qxd3 {[%emt 0:04:48]} Bxb2 {[%emt 0:00:02]} 26. Rab1 {[%emt 0:00:44]} Bf6 {[%emt 0:01:04]} 27. Re2 {[%emt 0:01:08]} Qc4 {[%emt 0:00:16]} 28. Rd1 {[%emt 0:02:51]} Rba7 {[%emt 0:02:49]} 29. Qxc4 {[%emt 0:01:50]} dxc4 {[%emt 0:00:02]} 30. Nc1 {[%emt 0:00:04]} Nb6 {[%emt 0:01:15]} 31. f4 {[%emt 0:00:51]} Rc8 {[%emt 0:01:40]} 32. Rd6 {[%emt 0:01:09]} Na4 {[%emt 0:00:17]} 33. Rc6 {[%emt 0:01:12]} Rxc6 {[%emt 0:03:04]} 34. Bxc6 {[%emt 0:00:00]} Nc5 {[%emt 0:00:28]} 35. Rc2 {[%emt 0:00:49]} Rc7 {[%emt 0:01:03]} 36. Bf3 {[%emt 0:01:24]} c3 {[%emt 0:00:26]} 37. g4 {[%emt 0:00:38]} g6 {[%emt 0:02:02]} 38. g5 {[%emt 0:00:13]} Bg7 {[%emt 0:00:01]} 39. e4 {[%emt 0:00:10]} Na6 {[%emt 0:00:55]} 40. a3 {[%emt 0:00:15]} Bf8 {[%emt 0:00:43]} 41. Ne2 {[%emt 0:00:21]} Bxa3 {[%emt 0:03:08]} 42. Rxc3 {[%emt 0:00:06]} Bc5 {[%emt 0:01:10]} 43. e5 {[%emt 0:02:10]} Rd7 {[%emt 0:00:38]} 44. Ng3 {[%emt 0:00:10]} Bf8 {[%emt 0:01:35]} 45. Ne4 {[%emt 0:01:12]} Rc7 {[%emt 0:01:06]} 46. Nf6+ {[%emt 0:00:22]} Kh8 {[%emt 0:00:02]} 47. Rd3 {[%emt 0:00:29]} Rc4 {[%emt 0:00:49]} 48. Rd8 {[%emt 0:00:22]} Kg7 {[%emt 0:00:01]} 49. Ne8+ {[%emt 0:01:13]} Kg8 {[%emt 0:00:06]} 50. Be2 {[%emt 0:00:24]} Ra4 {[%emt 0:00:46]} 51. Nf6+ {[%emt 0:00:24]} Kg7 {[%emt 0:00:02]} 52. Ne8+ {[%emt 0:00:28]} Kg8 {[%emt 0:00:01]} 53. Nf6+ {[%emt 0:00:50]} Kg7 {[%emt 0:00:00]} 54. Nd7 {[%emt 0:00:16]} Be7 {[%emt 0:00:40]} (54... Rd4 $1 $11) 55. Re8 {[%emt 0:00:12]} Bb4 {[%emt 0:00:20]} 56. Nf6 {[%emt 0:00:45]} Bf8 {[%emt 0:00:02] [#]} 57. Nxh7 {[%emt 0:00:36]} ({White should try} 57. Bxa6 $1 $16 Rxa6 58. Kg2) 57... Bc5 $2 {[%emt 0:01:35]} (57... Nc7 $11 {and Black stays safe.} 58. Rxf8 Nd5) 58. Nf6 {[%emt 0:00:13]} Bf8 {[%emt 0:00:02] [#]} 59. Nd7 $1 {[%emt 0:00:56]} Bb4 {[%emt 0:00:02]} 60. Nf6 $2 {[%emt 0:00:35]} (60. Rc8 $18) 60... Bf8 $16 {[%emt 0:00:02]} 61. Nd7 {[%emt 0:00:21]} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.5"]
[White "Mayeregger, Arnold"]
[Black "Munoz, Francisco Javier"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1913"]
[BlackElo "2308"]
[Annotator "TA"]
[PlyCount "108"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,108,-4,25,17,54,43,42,0,0,0,-2,-6,0,0,0,0,0,0,0,-20,-18,-18,-14,-22,-21,-35,15,-7,0,0,0,-19,-11,-25,0,-3,42,15,15,-12,0,-4,-7,-54,-70,-137,-147,-148,-147,-168,-158,-159,-135,-141,-120,-175,-31,-45,-22,-47,-42,-65,-59,-51,0,-303,-36,-347,-309,-572,-596,-584,-569,-1129,-246,-220,-220,-1845,-1816,-1766,-1675,-1567,-1530,-29975,-29976,-29976,-29977,-29974,-29978,-29976,-29979,-29979,-29980,-29980,-29981,-29982,-29983,-29984,-29985,-29985,-29986]} 1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. c3 Nc6 5. Nd2 Qb6 6. Qb3 {D00: 1 d4 d5: Unusual lines} c4 (6... Nh5 7. Qxb6 axb6 8. Bc7 cxd4 9. exd4 e5 10. Bxe5 Nxe5 11. dxe5 Bc5 12. g3 O-O {1-0 (76) Aronian,L (2765)-Caruana,F (2832) London 2018}) 7. Qc2 $1 g6 8. Be2 {White is slightly better.} Bg7 9. h3 Bf5 10. Qc1 Nd7 $146 ({Predecessor:} 10... O-O 11. Ngf3 Qd8 12. b3 b5 {½-½ (40) Ozkan,E (2219)-Metin,M (2166) Konya 2011}) 11. Ngf3 e5 12. dxe5 Ncxe5 13. Nxe5 Nxe5 14. O-O Nd3 15. Bxd3 $1 Bxd3 16. Re1 O-O 17. Nf3 h6 18. Be5 f6 19. Bd4 Qc7 20. b4 h5 21. Qd1 Rf7 22. Nd2 f5 23. Bxg7 Rxg7 24. Nf3 g5 25. Nd4 Qf7 $1 26. Qf3 h4 27. g4 (27. Kh1 $15) 27... hxg3 $1 $17 28. Qxg3 g4 {Hoping for ...gxh3.} 29. h4 Qf6 30. Rad1 Be4 31. Kf1 Re8 32. Ke2 {[#]} (32. a4 $17 {might work better.}) 32... Qa6 (32... Bf3+ $1 $19 {[%mdl 512]} 33. Kd2 (33. Nxf3 $2 f4 $19) 33... Bxd1 34. Rxd1 Rh7) 33. a4 $1 $15 Qh6 34. Kd2 $1 Kh8 35. Ne2 Bf3 36. Rc1 Re4 (36... Bxe2 $15 37. Rxe2 Qf6) 37. Nf4 $2 {[%mdl 8192] [#]} (37. Qb8+ $1 $11 Rg8 38. Qxa7) 37... Kh7 $2 (37... Qd6 $1 $19 {And now ...d4! would win.} 38. Rb1 Rd7) 38. Kc2 $2 {[%mdl 8192] [#]} (38. Nh3 $1 $15 gxh3 39. Qxf3) 38... a5 $1 $19 {[%mdl 512]} 39. b5 $2 (39. bxa5 {is a better defense.} d4 40. cxd4) 39... Qd6 {aiming for ...d4!} 40. Kb2 {[#]} d4 $1 {[%mdl 512]} 41. Ne2 (41. cxd4 Qb4+) 41... Qxg3 $2 (41... dxc3+ 42. Nxc3 f4) 42. Nxg3 {[#]} d3 $1 {[%cal Rd3d2] Threatens to win with ...d2.} 43. Nxe4 $2 (43. Rg1) 43... fxe4 {[%mdl 4096] Endgame KRR-KRB} 44. Rg1 Kh6 45. Ra1 Rd7 46. Kc1 d2+ {Black mates.} 47. Kc2 d1=Q+ 48. Raxd1 Rxd1 49. Rxd1 Bxd1+ 50. Kxd1 {KP-KP} Kh5 51. Ke2 Kxh4 52. Kf1 Kh3 53. b6 g3 54. fxg3 Kxg3 {Accuracy: White = 35%, Black = 61%.} 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.6"]
[White "Vazquez, Facundo"]
[Black "Gimenez Aguirre, Alejo Ismael"]
[Result "1/2-1/2"]
[ECO "D51"]
[WhiteElo "2086"]
[BlackElo "2247"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,63,40,41,63,56,66,58,79,76,78,81,90,99,129,114,100,66,145,150,140,84,83,83,89,89,90,82,87,54,71,75,83,53,188,89,91,44,52,58,68,0,22,25,16,0,25,31]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. cxd5 exd5 5. Bg5 Bb4+ 6. Nc3 c6 7. Qc2 O-O 8. e3 h6 9. Bh4 Nbd7 10. Bd3 Qe7 {D51: Queen's Gambit Declined: 4 Bg5 Nbd7 sidelines} (10... Re8 11. O-O Be7 12. Nd2 Nh5 13. Bxe7 Qxe7 14. Rab1 a5 15. a3 Nhf6 16. b4 axb4 17. axb4 b5 18. e4 dxe4 19. Ncxe4 Nxe4 20. Bxe4 {1-0 (74) Karjakin,S (2774)-Mamedyarov,S (2746) Almaty 2016}) 11. O-O g5 12. Bg3 Bxc3 $146 {White is slightly better.} ({Predecessor:} 12... Nh5 13. Rae1 Nxg3 14. fxg3 Nf6 15. a3 Ba5 16. b4 Bc7 17. Nd2 Qd6 18. Qb2 {½-½ (50) Carbajal,C (2064)-Pietrobono,A (2213) ICCF email 2006}) 13. bxc3 {[%cal Bb2c3,Bc3c4,Bc4c5][%mdl 32]} Ne4 14. c4 Nb6 15. c5 Nxg3 16. hxg3 Nd7 17. e4 g4 (17... dxe4 $14 18. Bxe4 Nf6) 18. Nh4 $16 dxe4 19. Nf5 (19. Bxe4 $142 Qg5 20. Rfe1) 19... Qg5 20. Bxe4 Nf6 21. Nd6 Ne8 22. Nc4 Be6 23. Ne5 Rd8 24. Qb2 Nf6 25. Bc2 Nd5 ({Black should play} 25... Rfe8 $14) 26. Bb3 (26. Qxb7 $18 {has better winning chances.} Ne7 27. Rad1 (27. Qxa7 Ra8 $11) (27. Nxc6 Nxc6 28. Qxc6 Rxd4 $16)) 26... Nc7 27. Rad1 Bxb3 28. Qxb3 Ne6 29. Qe3 (29. Rfe1 $14) 29... Qg7 30. Rfe1 Rfe8 31. Qe4 h5 (31... Nxc5 $5 32. Qf5 Rd5 $11) 32. Nc4 {Accuracy: White = 42%, Black = 31%.} 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.7"]
[White "Heinechen, Juan"]
[Black "Aguilar, Luis Miguel"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "2123"]
[BlackElo "2193"]
[Annotator "NA RC"]
[PlyCount "54"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 Be7 6. O-O h6 7. Re1 c6 8. a4 a5 9. h3 g5 10. Nh2 Qc7 11. Ba2 Nf8 12. d5 Rg8 13. Nf1 Ng6 14. Ne3 Nf4 15. Nf5 Bxf5 16. exf5 Qd7 17. dxc6 bxc6 18. Qf3 g4 19. hxg4 Rxg4 20. g3 Nh3+ 21. Kf1 Ng5 22. Qh1 Rc8 23. Qxh6 Qxf5 24. Bxg5 Rxg5 25. Qh2 Ng4 26. Qg1 Rh5 27. Re4 Rh1 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.8"]
[White "Cosme Contreras, Trilce"]
[Black "Suarez, Pedro"]
[Result "1/2-1/2"]
[ECO "A25"]
[WhiteElo "2051"]
[BlackElo "2077"]
[Annotator "NA RC"]
[PlyCount "94"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. c4 e5 2. Nc3 d6 3. g3 Be6 4. d3 Qd7 5. Bg2 Nc6 6. Nf3 Bh3 7. O-O Bxg2 8. Kxg2 g6 9. Rb1 Bg7 10. b4 f5 11. e4 Nf6 12. Nd5 O-O 13. b5 Ne7 14. Nxe7+ Qxe7 15. Bg5 h6 16. Bxf6 Qxf6 17. Nh4 f4 18. Qg4 Kh7 19. Nf3 h5 20. Qh4 Bh6 21. Qxf6 Rxf6 {Bh6 Qxf6 Rxf6} 22. h4 fxg3 23. fxg3 Raf8 24. a4 Kg7 25. a5 Be3 26. Ra1 R8f7 27. a6 bxa6 28. Rxa6 Bb6 29. Ra2 Kf8 30. Nh2 Ke7 31. Rxf6 Rxf6 32. Nf3 Kd7 33. Ra1 Ke7 34. Rf1 Bc5 35. Nh2 Rxf1 36. Nxf1 Kf6 37. g4 g5 38. gxh5 gxh4 39. Kh3 Kg5 40. h6 Kxh6 41. Kxh4 Kg6 42. Kg4 Bf2 43. Nd2 Be3 44. Nb1 Bd4 45. Nd2 Be3 46. Nb3 Bb6 47. Nd2 Be3 1/2-1/2

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.9"]
[White "Ayala Ruiz, Miguel Angel"]
[Black "Gomez Barrera, Gonzalo Andres"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "1444"]
[BlackElo "2058"]
[Annotator "NA RC"]
[PlyCount "59"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. d4 cxd4 3. c3 Nf6 4. e5 Nd5 {cxd5 Nd5} 5. cxd4 e6 6. Nf3 b6 7. Be2 Be7 8. O-O O-O 9. Nc3 Nxc3 10. bxc3 Qc7 11. Qc2 Ba6 12. c4 d5 13. Bd3 g6 14. h4 Bxc4 15. h5 Rc8 16. hxg6 hxg6 17. Bg5 Bxg5 18. Nxg5 Qe7 19. f4 Kg7 20. Rf3 Na6 21. a3 b5 22. Rg3 Bxd3 23. Qxd3 Rh8 24. Qxb5 Nc7 25. Qc6 Rh4 26. Rc1 Rc8 27. Qd6 Kf8 28. Rgc3 Re8 29. Rxc7 Qxd6 30. Rxf7+ 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.10"]
[White "Ayala Ruiz, Miguel Angel"]
[Black "Gomez Barrera, Gonzalo Andres"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "1444"]
[BlackElo "2058"]
[Annotator "NA RC"]
[PlyCount "33"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d5 2. exd5 Qxd5 3. d4 Nf6 4. Nf3 Bg4 5. Be2 e6 6. O-O Nc6 7. c3 Be7 8. Qb3 O-O-O 9. Be3 Ne4 10. Rc1 f5 11. Bc4 Qd6 12. Bxe6+ Kb8 13. d5 Na5 14. Qa4 b6 15. b4 Nc4 16. Nd4 Bf6 17. Nb5 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.10"]
[White "Melian Juan Sebastian Ayala"]
[Black "Orrego Palermo, Marcelo"]
[Result "1-0"]
[ECO "B01"]
[BlackElo "1632"]
[Annotator "NA RC"]
[PlyCount "33"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 d5 2. exd5 Qxd5 3. d4 Nf6 4. Nf3 Bg4 5. Be2 e6 6. O-O Nc6 7. c3 Be7 8. Qb3 O-O-O 9. Be3 Ne4 10. Rc1 f5 11. Bc4 Qd6 12. Bxe6+ Kb8 13. d5 Na5 14. Qa4 b6 15. b4 Nc4 16. Nd4 Bf6 17. Nb5 1-0

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.11"]
[White "Avalos Sanabria, Augusto Alfredo"]
[Black "Araoz Andrade, Ivan Alexander"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "1474"]
[BlackElo "1843"]
[Annotator "NA RC"]
[PlyCount "48"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f3 e5 7. Nde2 Be6 8. Be3 h5 9. Bg5 Nbd7 10. h4 Be7 11. Qd2 b5 12. a3 Qb6 13. Be3 Qb7 14. Ng3 g6 15. Bd3 Nb6 16. b3 Rc8 17. O-O O-O 18. Bg5 Nh7 19. Nce2 Bxg5 20. hxg5 Qe7 21. Qa5 Qa7 22. Bxb5 Nc4+ 23. Kh1 Nxa5 24. Bd3 h4 0-1

[Event "XV South American-ch Open U20 2019"]
[Site "Asuncion"]
[Date "2019.05.17"]
[Round "9.12"]
[White "Menacho Admen, Victor Gabriel"]
[Black "Allo Collante, Enrique"]
[Result "0-1"]
[ECO "D51"]
[WhiteElo "1103"]
[BlackElo "1595"]
[Annotator "NA RC"]
[PlyCount "56"]
[EventDate "2019.05.11"]
[EventType "swiss"]
[EventCountry "PAR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Bg5 Nbd7 5. cxd5 cxd5 6. Nf3 e6 7. e3 Be7 8. Bb5 O-O 9. O-O a6 10. Ba4 b5 11. Bb3 Bb7 12. a3 Ne8 13. Bxe7 Qxe7 14. Re1 Nd6 15. Bc2 f5 16. Nd2 Qf6 17. f3 Nb6 18. e4 Qxd4+ 19. Kf1 fxe4 20. Ndxe4 Qxd1 21. Raxd1 Nxe4 22. Nxe4 dxe4 23. Bxe4 Bxe4 24. Rxe4 Rf6 25. Red4 Nd5 26. Kf2 Rc8 27. R1d2 Rc6 28. Ke2 Kf7 0-1

