[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.08"]
[Round "1"]
[White "Li, Ruifeng"]
[Black "Brattain, Mika A"]
[Result "1/2-1/2"]
[ECO "A01"]
[WhiteElo "2568"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "163"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,163,29,27,15,21,22,20,15,4,7,0,0,0,47,43,50,50,48,49,44,41,59,31,38,25,31,33,25,33,39,22,50,52,85,77,106,98,99,92,60,63,75,-57,-36,-420,-439,-456,-437,-312,-127,-123,-126,-116,-112,-112,-104,-454,-433,-559,-489,-707,-681,-644,-222,-236,-219,-207,-220,-184,-209,-482,-476,-476,-461,-450,-454,-477,-461,-415,0,-379,-360,-391,-387,-594,-593,-583,-417,-572,-537,-595,-592,-569,-476,-414,0,-566,-557,-718,-678,-741,-726,-861,-860,-848,-839,-840,-756,-884,-881,-870,-862,-834,-831,-1032,-1102,-1043,-786,-786,-741,-833,-801,-1326,-1253,-1377,-1329,-5114,-952,-1464,-1381,-1513,-1525,-29964,-1449,-1417,-1444,-1391,-1355,-1229,-1208,-914,-257,-230,0,0,0,0,0,0,0,0,0,0]} 1. b3 d5 2. Bb2 c5 3. e3 Nf6 4. Nf3 Nc6 5. Bb5 Bd7 6. O-O e6 7. d4 {LiveBook: 5 Games. A06: Réti Opening:1 Nf3 d5} (7. c4 dxc4 8. bxc4 Bd6 9. d4 cxd4 10. exd4 O-O 11. Ne5 Qc7 12. f4 Rad8 13. Nd2 a6 14. Ba4 Nxe5 15. fxe5 Bxe5 16. dxe5 Bxa4 {0-1 (26) Romanov,E (2640)-Postny,E (2606) Kishinev 2017}) 7... cxd4 8. exd4 Bd6 9. a3 O-O 10. Bd3 Ne4 11. c4 f5 12. Nc3 $146 ({Predecessor:} 12. b4 a5 13. b5 Ne7 14. c5 Bc7 {0-1 (28) Feuerstein,A-Polugaevsky,L Reykjavik 1957}) 12... Qf6 (12... Ng5 {is interesting.} 13. Be2 dxc4 14. bxc4 Rc8 15. Re1 Bb8) 13. cxd5 Nxc3 14. Bxc3 exd5 15. b4 f4 16. Qb3 Ne7 17. b5 Bg4 18. Ne5 $36 {[%mdl 2048] White has some pressure.} Be6 19. Rfe1 {[%cal Bf1e1,Be1e5,Be5h5][%mdl 32]} Bxe5 20. Rxe5 {Strongly threatening Rae1.} Ng6 21. Rh5 f3 22. g3 Qf7 23. Rg5 Qf6 24. h4 $1 Nh8 25. Re5 Ng6 26. Rh5 h6 27. Qc2 (27. Re1 $16) 27... Nf4 $1 $15 {[%cal Rf4h5]} 28. gxf4 $4 {[%mdl 8192]} (28. Re5 $1 $15) 28... Qxf4 $19 29. Kf1 ({But not} 29. Bh7+ $2 Kh8 $19) 29... Qh2 {[%cal Rh2h1]} 30. Ke1 {[%cal Bf1e1,Be1d2,Bd2c1,Bc1b2][%mdl 32]} Qg1+ (30... Rac8 $1 $19 {has better winning chances.} 31. b6 axb6) 31. Kd2 $17 Qxf2+ 32. Kc1 Qg3 $1 {[%mdl 1024] ...f2 is the strong threat. Black has strong compensation.} 33. Kb2 {[#]} f2 $1 34. Bf1 $2 {[%mdl 8192]} (34. Re5 $17 Bh3 35. Bb4) 34... Rac8 $19 {And now ...Rf3 would win.} 35. Qd2 Rf3 36. Rc1 (36. Bb4 $142 Rc4 37. Qd1 (37. Bxc4 $2 dxc4 38. Bc3 f1=Q $19)) 36... Bh3 37. Be2 Rfxc3 $2 (37... f1=Q 38. Bxf1 Bxf1) 38. Rxc3 Qxc3+ 39. Qxc3 Rxc3 40. Kxc3 Bg4 $1 {[%cal Rg4e2]} 41. Bxg4 $2 (41. Kd2 Bxh5 42. Bf1) 41... f1=Q {White must now prevent ...Qc4+.} 42. Rxd5 {[%mdl 4096] Endgame KQ-KRB} Qe1+ 43. Kc4 Qc1+ 44. Kb3 Qb1+ 45. Kc3 Qe1+ 46. Kc4 Qxh4 47. Be6+ Kf8 48. Rd7 (48. Rf5+ {keeps fighting.} Ke7 49. Re5) 48... Qe4 49. Bd5 Qc2+ 50. Kb4 b6 51. Bc6 Qb2+ 52. Kc4 Qa2+ 53. Kb4 Qb2+ 54. Kc4 Qxa3 55. d5 a6 56. bxa6 Qxa6+ 57. Kd4 Qa1+ 58. Ke4 Qe1+ 59. Kd4 Qf2+ 60. Ke4 h5 61. Rd8+ Ke7 62. Re8+ Kf7 63. Rh8 h4 64. Bd7 Qg2+ 65. Kd4 Qg3 66. Be6+ Ke7 67. Kc4 g5 {[%cal Bg7g5,Bg5g4][%mdl 32]} 68. Rh7+ Kd6 69. Rh6 {[#]} Ke5 (69... b5+ $142 $1 70. Kxb5 Qd3+ 71. Ka5 Qc3+ 72. Ka6 Qg7) 70. Kb5 g4 71. Kc6 h3 72. d6 Qc3+ (72... Qe3 $142 73. d7 Qxh6 74. d8=Q Qxe6+ 75. Kc7 g3 76. Qh8+ Ke4 77. Qa8+ Qd5 78. Qa4+ Kf3 79. Qa3+ Kg2 80. Qb2+ Kh1 81. Qc1+ Kh2 82. Qf4 Kg2 83. Qa4 Qe5+ 84. Kxb6 Qb8+ 85. Kc5 Qf8+ 86. Kb6 h2 87. Kc7 Qg7+ 88. Kb6 h1=Q 89. Qc2+ Kh3 90. Qf5+ Qg4 91. Qh7+ Qh4 92. Qf5+ Kh2 93. Qc2+ Qg2 94. Qxg2+ Kxg2 95. Kc5 Kf3 96. Kd5 g2 97. Kc5 g1=Q+ 98. Kc6 Qe4+ 99. Kd7 Qa7+ 100. Kd8 Qea8#) 73. Kd7 Qd4 74. Rh5+ Kf6 75. Rf5+ Kg6 76. Rd5 Qa4+ $2 (76... Qa1 {Threatens to win with ...h2.} 77. Rd3 h2) 77. Ke7 h2 $2 ({Better is} 77... Qf4 $19 78. Bf5+ Kg7) 78. Bf7+ $11 {The position is equal.} Kh6 (78... Kh7 $5 79. Rh5+ $8 Kg7 80. Rg5+ Kh8 81. Rh5+ Kg7 82. Rg5+ Kh8 83. Rh5+ Kg7 $11) 79. Rh5+ Kg7 80. Rg5+ Kh6 {aiming for ...Qe4+.} (80... Kh8 $5 81. Rh5+ $8 Kg7 82. Rg5+ Kh8 83. Rh5+ Kg7 $11) 81. Rh5+ Kg7 82. Rg5+ {Precision: White = 47%, Black = 67%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.08"]
[Round "1"]
[White "Brown, Michael William"]
[Black "Checa, Nicolas D"]
[Result "1/2-1/2"]
[ECO "D10"]
[WhiteElo "2508"]
[BlackElo "2415"]
[Annotator "TA"]
[PlyCount "121"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,121,30,32,35,32,19,20,36,0,0,8,4,0,0,-22,-4,-15,0,0,24,8,8,8,12,7,28,8,7,14,28,8,11,-14,-8,-40,-28,-18,0,0,0,0,0,0,52,55,36,0,64,13,12,16,25,77,31,-66,0,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,8,8,8,8,8,8,8,8,8,8,8,8,8,62,0,0,0,0,0,0,0,0,0,0,0,8,8,8,8,8,8]} 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Bg5 Nc6 6. Bxf6 {D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3} gxf6 7. e3 e6 (7... a6 8. Rc1 Bf5 9. Bd3 Bg6 10. f4 f5 11. h4 h5 12. Nf3 e6 13. Na4 f6 {½-½ (39) Grischuk,A (2761)-Carlsen,M (2832) Paris 2017}) 8. Nf3 {LiveBook: 8 Games. White has an edge.} Bd7 {[%cal Bc8d7,Bd7b5,Bb5c4][%mdl 32]} 9. Rc1 Rc8 $146 ({Predecessor:} 9... Bd6 10. a3 f5 11. Bb5 O-O 12. Bxc6 Bxc6 13. O-O Kh8 {½-½ (72) Artemiev,V (2653)-Malakhov,V (2713) Doha 2016}) 10. Bd3 Qb6 11. Qe2 Nb4 12. Bb1 {[#]} Bb5 $1 {[%mdl 512]} 13. Qd2 (13. Nxb5 Rxc1+) 13... Bc4 14. b3 Ba6 15. Na4 $1 Rxc1+ 16. Qxc1 Qc6 17. Qxc6+ (17. Kd2 {looks sharper.} Kd7 18. Nc5+ Bxc5 19. Qxc5 Qxc5 20. dxc5 h5 21. Kc3) 17... Nxc6 18. Nc5 Bxc5 19. dxc5 b6 20. cxb6 axb6 21. Kd2 Ke7 22. Rc1 Kd6 23. e4 d4 24. e5+ fxe5 25. Ng5 $1 {[%cal Rg5f7]} Nd8 26. Ne4+ Kd7 27. Nf6+ $1 Ke7 28. Ne4 Bb7 ({Black should play} 28... Bb5 $11) 29. Rc7+ $14 {[%mdl 1024] White has compensation.} Kf8 30. g4 Kg7 (30... Bxe4 $1 $11 31. Bxe4 h5) 31. g5 (31. h4 $14) 31... h6 $11 32. g6 {Threatens to win with Nd6.} Bxe4 33. Bxe4 {[%mdl 4096] Endgame Hoping for a4. KRB-KRN} Kf6 34. Rc8 (34. g7 $1 $14 Kxg7 35. b4) 34... Ke7 (34... fxg6 $15 35. Rb8 Nf7 36. Rxb6 Rf8) 35. gxf7 Nxf7 36. Rxh8 Nxh8 {KB-KN} 37. a4 Kd6 38. b4 $1 Nf7 39. Kd3 Ng5 40. Bg2 Nh7 41. a5 bxa5 42. bxa5 {Strongly threatening a6.} Kc5 43. a6 Kb6 44. f4 exf4 {And now ...e5 would win.} 45. Kxd4 Ng5 46. Ke5 f3 47. Bf1 {Black must now prevent h4.} f2 48. Kf4 {[#]} e5+ $1 {[%mdl 512]} 49. Ke3 (49. Kxe5 Nf3+) 49... e4 50. Kxf2 {White wants to play Be2.} Nf3 51. h3 {[%cal Bh2h3,Bh3h4][%mdl 32]} Ng5 52. Kg3 e3 ({Better is} 52... Ne6 $11) 53. Bd3 (53. Bc4 $1 $14) 53... Ne6 {The position is equal.} 54. Kf3 Ng5+ 55. Kg3 Ne6 56. h4 Nd4 57. h5 e2 58. Kf2 Ne6 59. Bxe2 Nf4 60. Ke3 Nxh5 61. Bxh5 {Precision: White = 60%, Black = 69%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.08"]
[Round "1"]
[White "Chandra, Akshat"]
[Black "Colas, Joshua"]
[Result "1-0"]
[ECO "B47"]
[WhiteElo "2484"]
[BlackElo "2366"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,117,42,40,78,66,85,52,43,43,83,87,117,122,116,106,124,91,136,126,132,109,123,126,151,150,147,139,132,131,130,48,56,32,80,82,96,81,118,116,113,96,97,104,104,120,102,87,95,92,118,120,112,114,134,129,112,126,405,414,391,318,294,309,306,285,269,238,503,503,503,495,662,662,577,660,645,645,657,657,634,642,468,439,426,388,766,768,761,730,2398,2535,29976,29977,29977,29978,29991,29992,29992,29993,29993,29994]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 Nf6 7. Be3 Be7 8. f4 d6 9. Qd2 a6 10. O-O-O Bd7 {B83: Sicilian Scheveningen: 6 Be2, lines without ...a6} (10... O-O 11. g4 Nxd4 12. Qxd4 b5 13. g5 Nd7 14. h4 Bb7 15. a3 Rac8 16. h5 e5 17. Qd2 exf4 18. Bxf4 Ne5 19. Kb1 Nc4 20. Bxc4 Qxc4 {0-1 (57) Ponomariov,R (2712)-Harikrishna,P (2753) Huaian 2016}) 11. g4 {[%cal Bg2g4,Bg4g5,Bg5f6][%mdl 32]} Nxd4 12. Bxd4 {g5 is the strong threat.} Bc6 {White is slightly better.} 13. Bf3 e5 14. Be3 Nd7 15. f5 b5 16. g5 $36 {[%mdl 2048] Black is under strong pressure.} Rc8 17. Kb1 Nb6 18. Bxb6 Qxb6 {[#]} 19. f6 $146 {[%mdl 512]} gxf6 20. gxf6 Bf8 21. Bh5 Rg8 22. Nd5 Qc5 23. Qe2 {Hoping for Bxf7+!} Bxd5 24. exd5 ({White should try} 24. Rxd5 $16 Qc4 25. Rd3) 24... Rc7 $14 25. Qe4 Rg5 26. Be2 {[%cal Bh5e2,Be2d3,Bd3h7][%mdl 32]} Rg6 27. Rhf1 Bh6 28. Bd3 Bf8 29. h4 h6 30. Qf3 Rg8 31. Bh7 Rh8 32. Bf5 Rg8 33. Qh1 a5 34. Rg1 Rxg1 35. Rxg1 Qf2 36. Rf1 Qd4 37. Bd3 b4 $2 {[%mdl 8192] [#]} (37... Rc5 $16) 38. Bb5+ $1 $18 Kd8 {and the idea ...Rc5 leaves Black hopeful.} 39. Bc6 a4 40. Bxa4 Rc4 {If only Black now had time for ...Qe3....} 41. Bb3 Rc8 42. Qg2 Qxh4 $2 (42... Ra8 {keeps fighting.} 43. Qg3 Ke8) 43. Qg8 Kc7 44. Qxf7+ Kb6 45. Qd7 Rc7 46. Qe8 Qh3 {[%cal Rh3f1]} 47. Rg1 {Threatens to win with Qb8+.} Rc8 48. Qa4 Qh4 49. Qd7 Qf2 {[%cal Rf2g1]} 50. Rd1 Qc5 51. Ba4 h5 $2 (51... Rb8 52. Qh3 Qc4) 52. Bc6 Rb8 53. a3 bxa3 54. Rd3 {Rb3+ would kill now.} Ka6 55. Rb3 {White mates.} Rxb3 56. Qc8+ Ka5 57. Qa8+ Kb6 58. Qb7+ Ka5 59. cxb3 {Precision: White = 80%, Black = 52%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.08"]
[Round "1"]
[White "Troff, Kayden W"]
[Black "Tang, Andrew"]
[Result "1-0"]
[ECO "D31"]
[WhiteElo "2472"]
[BlackElo "2478"]
[Annotator "TA"]
[PlyCount "146"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,146,27,27,34,31,37,26,47,54,145,145,153,141,144,149,133,133,137,170,143,154,157,121,116,114,108,121,107,39,66,21,22,14,29,33,80,91,164,168,185,164,118,153,154,87,131,91,179,174,192,177,169,174,179,196,182,170,130,151,204,206,196,160,183,129,195,114,118,100,94,116,242,236,259,256,263,236,250,220,255,225,229,210,219,222,308,289,460,472,479,481,420,416,519,455,672,667,663,653,611,588,620,525,1816,1690,12833,12833,12833,2383,1742,1675,12833,12836,12837,12837,12836,12831,12837,12838,12838,12838,12841,12841,12846,12845,12845,12845,12848,12847,12850]} 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. cxd5 exd5 5. Bf4 c6 6. Qc2 g6 {[%cal Bg7g6,Bg6g5][%mdl 32]} 7. e3 Bf5 8. Qd2 Nd7 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6} 9. f3 g5 10. Bg3 $1 {LiveBook: 4 Games} Ngf6 {White has an edge.} 11. Bd3 Bg6 12. Nge2 O-O $146 ({Predecessor:} 12... Nh5 13. Bf2 Ng7 14. e4 Nb6 15. O-O O-O {½-½ (15) Razuvaev,Y (2545)-Geller,E (2505) Sochi 1989}) 13. h4 Nh5 (13... g4 $14) 14. hxg5 $16 Nxg3 15. Nxg3 Bxg5 16. O-O-O $1 f5 17. f4 Bh4 18. Nge2 Qe7 19. g3 Bf6 {[#]} 20. g4 $1 {[%mdl 512]} fxg4 21. Rdg1 $1 Bxd3 22. Qxd3 Rae8 23. Kd2 (23. Rxg4+ $16 Kh8 24. Rg3) 23... Rf7 24. Ng3 {[%mdl 1024] Black must now prevent Nf5. White has compensation.} Qe6 25. Rh6 c5 {Threatens to win with ...cxd4.} 26. Nf5 Kh8 27. Rgh1 c4 (27... Kg8 $16) 28. Qb1 $18 Nf8 29. R1h5 Rd8 30. Qg1 b5 31. Qxg4 ({White should try} 31. a3 $1) 31... b4 $16 32. Ne2 {Rg5 is the strong threat.} Qa6 (32... Qd7 $16 {was necessary.}) 33. Ke1 $18 Qb7 34. Rh2 Qc7 35. Rg2 {[%csl Gg2][%cal Rg4g8]} Bg7 36. Rh5 Rdd7 37. Nxg7 Rxg7 38. Rg5 $40 {[%mdl 128] White goes for the king.} h6 {[#]} (38... Rde7 $16) 39. Qh5 $1 Qd6 40. Rh2 Kh7 41. Qh3 ({Better is} 41. Kf2 $18) 41... Rde7 (41... Qc6 $16 42. Kf2 a5 43. Qf5+ Kg8 44. Rxg7+ Rxg7) 42. Qf5+ ({White should play} 42. Rh5 $18 Re6 43. Qf5+ Kg8 44. R2h3 (44. Qxd5 Qxd5 45. Rxd5 Rxe3 $16)) 42... Kg8 $16 43. Rxg7+ Rxg7 44. Rh5 Rd7 {[#]} (44... Nd7 $16 45. Qxd5+ Qxd5 46. Rxd5 Re7) 45. Qh3 $1 $18 Rh7 46. Qg2+ Rg7 47. Qxd5+ Qxd5 48. Rxd5 {[%mdl 4096] Endgame KRN-KRN} Nd7 49. Rb5 Nf6 50. Rxb4 h5 51. Rxc4 {Hoping for Rc6.} h4 {intending ...h3.} 52. Rc5 h3 (52... Kh7 {was worth a try.} 53. Kf1 h3) 53. Rg5 Rxg5 54. fxg5 {KN-KN} h2 55. Ng3 Ne4 56. Nh1 {White is clearly winning.} Kg7 (56... Kf7 $142 57. Kf1 Nxg5) 57. Kf1 Kg6 58. Kg2 Nd2 59. Kxh2 Nf1+ 60. Kg2 Nxe3+ 61. Kf3 Nc2 62. Ke4 Kxg5 63. a3 (63. Nf2 $142 Kf6 64. Ng4+ Ke6 65. Ne3) 63... Kf6 64. Nf2 Ke6 65. Nd3 Kd6 66. Ne5 Na1 67. Nc4+ Kd7 68. Nd2 Nc2 69. d5 Kd6 70. Nf3 Kc5 71. Kd3 Na1 72. Kc3 a5 73. b3 Kxd5 {Precision: White = 69%, Black = 51%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.08"]
[Round "1"]
[White "Liu, Bovey"]
[Black "Liang, Awonder"]
[Result "0-1"]
[ECO "B51"]
[WhiteElo "2228"]
[BlackElo "2536"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,90,20,4,25,11,12,4,8,0,0,18,14,11,20,21,20,-40,-22,-37,-18,-64,0,-2,50,15,3,13,50,53,54,65,54,0,0,0,6,6,89,0,0,0,37,-13,0,-33,0,-28,6,-63,-64,-108,-110,-112,0,-204,-200,-199,-193,-193,-183,-172,-193,-783,-450,-443,-441,-693,-462,-564,-438,-738,-666,-715,-680,-12845,-12845,-12845,-12846,-12847,-12846,-12848,-12848]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Qxd4 a6 6. Bxd7+ (6. Be2 {is more complex.} e5 7. Qe3 Nc5 8. b4 Na4 9. Qb3) 6... Qxd7 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7} 7. O-O e5 8. Qd3 Qc6 {The position is equal.} 9. c4 Be6 10. b3 b5 11. cxb5 $146 ({Predecessor:} 11. Na3 Nf6 12. Nd2 Rb8 13. Bb2 Be7 14. Rac1 {0-1 (37) Hasangatin,R (2509)-Andreikin,D (2723) Sochi 2017}) 11... axb5 12. Nc3 b4 13. Ne2 (13. Qb5 $11 Rc8 14. Qxc6+ Rxc6 15. Nd5) 13... Nf6 14. Ng3 h6 15. a4 bxa3 (15... Qc3 $15 16. Qb5+ Bd7) 16. Bxa3 $11 Rb8 (16... Be7 $11) 17. Nd2 {[%cal Bf3d2,Bd2c4,Bc4a5,Ba5c6][%mdl 32]} (17. Rfc1 $5 {[%cal Rc1c6]} Qb6 18. Nd2 $14) 17... Be7 18. Nc4 Rd8 (18... Bxc4 $5 19. bxc4 g6 $14) 19. Rfc1 {[#] aiming for Nxd6+!} Qd7 20. Na5 Rb8 21. Rab1 ({White should play} 21. Nc6 $14 Rb6 22. Nxe7 Kxe7 23. Qc3) 21... Qb5 $36 {[%mdl 2048] Black is more active.} 22. Qxb5+ Rxb5 23. Nc6 Bf8 (23... Bd7 $11 {remains equal.}) 24. Rc3 (24. Ra1 $16) 24... h5 25. f3 g5 {[%cal Bg7g5,Bg5g4][%mdl 32]} 26. Nf1 g4 27. Ne3 (27. Ra1 $5 {[%cal Ra3b4]}) 27... Rg8 28. Kf2 h4 29. Rd3 (29. Ra1 $11) 29... Kd7 $1 $15 {[%cal Rd7c6]} 30. Rc1 h3 31. Bb2 {[#] Black must now prevent Nxe5+.} Ke8 (31... Rg5 $1 $17 32. g3 gxf3 33. Kxf3 Nxe4) 32. Ba3 $2 (32. Ra1 $11 {and White stays safe.}) 32... hxg2 $19 {And now ...gxf3 would win.} ({Weaker is} 32... Rxb3 33. Rxb3 Bxb3 34. Nxe5 $11) 33. Bxd6 gxf3 34. Bxe5 {[%csl Gc6][%cal Rd3d8]} Nxe4+ 35. Kxf3 {[%csl Gc6][%cal Rd3d8]} Bd7 36. Bg3 $2 (36. Nb8 Nc5 37. Rxd7) 36... g1=Q {Black is clearly winning.} 37. Rxg1 Bxc6 38. Ke2 (38. Bh4 $142 Nd6+ 39. Kf2) 38... Be7 39. Rc1 Rc5 40. Rc4 (40. Rxc5 $142 Bxc5 41. Nc4) 40... Nxg3+ 41. hxg3 Bb5 42. Rxc5 Bxd3+ 43. Kxd3 Bxc5 44. Nf5 Rg4 45. Ke2 Rg5 {Precision: White = 31%, Black = 44%.} 0-1

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.09"]
[Round "2"]
[White "Tang, Andrew"]
[Black "Liang, Awonder"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2478"]
[BlackElo "2536"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,107,15,1,-2,0,17,0,7,0,0,4,28,11,22,25,32,26,34,16,16,3,17,19,24,25,36,39,31,29,30,38,31,27,41,36,39,31,36,35,53,32,41,42,85,82,214,190,220,215,254,254,246,220,246,225,233,228,215,217,214,204,218,189,197,199,247,244,249,239,255,249,296,300,325,327,341,346,335,323,392,392,375,367,372,345,471,338,550,542,617,615,783,741,693,675,682,666]} 1. d4 Nf6 2. c3 g6 3. Bg5 Bg7 4. Nd2 d5 5. e3 O-O 6. Ngf3 Nbd7 7. h3 Re8 {D03: 1 d4 d5 2 Nf3 Nf6 3 Bg5, including Torre Attack with early ...d5} 8. Bf4 b6 9. Bd3 $146 ({Predecessor:} 9. a4 a6 10. Be2 Bb7 11. Qb3 Ne4 12. Rd1 e6 13. O-O Nxd2 14. Rxd2 c5 15. Rc1 {½-½ (56) Ulko,J (2482)-Nepomniachtchi,I (2714) Moscow 2015}) 9... Bb7 {The position is equal.} 10. O-O Ne4 11. a4 {[%cal Ba2a4,Ba4a5,Ba5a6][%mdl 32]} Nxd2 12. Qxd2 c5 13. a5 c4 14. Bc2 b5 15. a6 Bc6 16. Rfe1 Qb6 17. b3 e5 18. dxe5 Nxe5 19. Nxe5 Bxe5 20. Bxe5 Rxe5 21. Bd1 Rd8 22. Be2 Ba8 23. Red1 Ree8 24. Qb2 Rd6 25. Rd4 Rc8 26. bxc4 bxc4 27. Qd2 Rcd8 28. Rd1 Qxa6 {[#]} (28... Bc6 $16 {keeps fighting.}) 29. Bxc4 $1 $18 {[%mdl 512]} Qa5 {[#]} (29... dxc4 30. Rxd6) 30. e4 $1 {[%mdl 512]} Rc8 (30... dxe4 31. Rxd6) 31. exd5 h5 32. Rc1 {[%cal Bd1c1,Bc1c2,Bc2b2,Bb2b4][%mdl 32]} Rcd8 33. Ba2 ({Don't do} 33. Rd1 $6 Bb7) 33... Ra6 34. Rc2 Qc5 35. c4 Bb7 36. Rd3 Bc8 {White should prevent ...Bf5.} 37. Qe3 Ra5 {next ...Bf5 is good for Black.} 38. Rb2 Ba6 39. Qxc5 Rxc5 40. Rb4 Ra5 41. Bb3 Kg7 42. Rd2 Ra1+ 43. Kh2 Rc1 44. Ra4 Bc8 45. Rxa7 Re8 {If Black can now play ...Ree1 this consolidates a bit.} 46. Rd1 Rc3 47. Ba4 Rd8 48. Bb5 Rc2 49. Kg1 Rd6 $2 (49... Bf5 50. d6 Be6) 50. Rc7 {White is clearly winning.} Rf6 51. d6 Rfxf2 {[#]} 52. Bc6 $1 ({Weaker is} 52. Rxc8 Rxg2+ 53. Kf1 Rcf2+ 54. Ke1 Re2+ 55. Kf1 Ref2+ 56. Ke1 Re2+ 57. Kf1 Ref2+ $11) 52... Be6 53. d7 Bxd7 54. Rdxd7 {Precision: White = 81%, Black = 26%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.09"]
[Round "2"]
[White "Troff, Kayden W"]
[Black "Li, Ruifeng"]
[Result "1-0"]
[ECO "D45"]
[WhiteElo "2472"]
[BlackElo "2568"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,53,38,21,109,119,108,113,180,192,185,199,418,386,988,974,974,571,541,546,902,893,978,964,1591,1301,1284,1208,1929,1666]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. Bd3 dxc4 8. Bxc4 b5 9. Be2 O-O 10. O-O a6 {D46: Semi-Slav: 5 e3 Nbd7 6 Bd3, Black avoids the Meran} 11. Ng5 Qc7 12. e4 {[%cal Be3e4,Be4e5][%mdl 32]} Bxh2+ 13. Kh1 c5 14. e5 {[#] LiveBook: 3 Games} h6 $146 (14... cxd4 $11 {remains equal.} 15. exf6 Nxf6) ({Predecessor:} 14... cxd4 15. exf6 Nxf6 16. f4 Bg3 17. Qd3 dxc3 18. Qxg3 {½-½ (54) Yilmaz,M (2582)-So,W (2779) Kocaeli 2015}) 15. Nf3 $16 (15. exf6 hxg5 16. Bf3 Rb8 $15) 15... cxd4 16. exf6 Be5 (16... Nxf6 $16 17. Nxh2 (17. Nxd4 Be5 $16) 17... Bb7) 17. Nxe5 $18 Nxe5 18. fxg7 Kxg7 $2 {[#]} (18... Rd8 {was called for.}) 19. Qe4 $1 {[%csl LRa8,LRd4]} Rd8 $2 (19... Bb7 20. Qxd4 f6) 20. Qh4 {White is clearly winning.} Rh8 21. Qxd4 f6 22. Bf4 Bb7 23. Bxe5 fxe5 24. Qg4+ Kf6 25. Ne4+ Bxe4 26. Qxe4 Rad8 27. Rac1 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.09"]
[Round "2"]
[White "Checa, Nicolas D"]
[Black "Liu, Bovey"]
[Result "1/2-1/2"]
[ECO "E15"]
[WhiteElo "2415"]
[BlackElo "2228"]
[Annotator "TA"]
[PlyCount "104"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,104,25,37,35,39,47,54,54,47,50,50,49,60,56,52,25,34,30,44,35,42,23,49,35,38,16,20,26,24,23,16,18,26,23,50,0,0,0,0,0,0,-23,0,-22,0,-30,-29,-28,0,0,0,0,0,0,11,11,44,44,44,44,44,44,44,44,44,36,43,30,30,27,27,27,27,6,6,6,6,0,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 c6 5. Bg2 d5 6. O-O Be7 7. Nc3 O-O 8. Nd2 {E06: Closed Catalan: Early deviations} (8. b3 Nbd7 9. Nd2 Ba6 10. e4 dxc4 11. Nxc4 b5 12. Ne3 Qb6 13. Bb2 Rfd8 14. Rc1 e5 15. Ne2 b4 16. Nc4 Bxc4 17. Rxc4 {½-½ (46) Gelfand,B (2734)-Vallejo Pons,F (2711) Almaty 2016}) 8... Ba6 9. b3 $1 b5 {[%cal Rd5c4]} 10. c5 $1 {White is slightly better.} b4 11. Na4 Bb5 $146 ({Predecessor:} 11... e5 12. dxe5 Nfd7 13. Nf3 Bb5 14. e6 fxe6 15. Nd4 Bf6 16. Nxe6 {1-0 (46) Azmaiparashvili,Z-Izvozchikov,A Tbilisi 1979}) 12. a3 Bxa4 13. bxa4 bxa3 14. e4 dxe4 15. Nxe4 Nd5 16. Rxa3 Nd7 17. Rb3 N7f6 18. Qd3 Rb8 19. Bd2 Rxb3 20. Qxb3 Nxe4 21. Bxe4 Bf6 22. Qd3 g6 23. Rb1 Qc7 24. a5 (24. Bxd5 $5 exd5 25. h4 $11) 24... Rb8 25. Rxb8+ Qxb8 26. a6 Qb2 27. Be3 (27. Bxd5 $5 exd5 28. Bc3 $11) 27... Kg7 (27... Nb4 $5 {[%cal Rb4d3]} 28. Qd1 Bg7 $11) 28. h4 (28. Bxd5 {is interesting.} exd5 29. h4 Qa1+ 30. Kg2 h6 31. Qd2) 28... h5 29. Bg2 (29. Bxd5 $5 exd5 30. Kg2 $11) 29... Nxe3 30. fxe3 Qa1+ 31. Kh2 Qa4 32. Kh3 e5 {[%cal Re5d4]} 33. d5 Qg4+ 34. Kh2 e4 35. Qxe4 Qxe4 36. Bxe4 {Strongly threatening d6.} cxd5 37. Bxd5 $14 {[%mdl 4096] Endgame KB-KB} Be7 38. c6 {[#] Black must now prevent c7.} Bd6 39. Kg2 f5 40. Kf3 Kf6 41. e4 fxe4+ 42. Bxe4 g5 {[%cal Bg6g5,Bg5g4][%mdl 32]} 43. Bd5 g4+ {The position is equal.} 44. Kf2 Be5 45. Bg2 Bd6 46. Bf1 Be5 47. Bc4 Bd6 48. Bb5 Bc7 49. Kg2 Kg7 50. Bd3 Kf6 51. Kf2 Bd6 52. Bh7 Bc7 {Precision: White = 57%, Black = 54%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.09"]
[Round "2"]
[White "Colas, Joshua"]
[Black "Brown, Michael William"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "2366"]
[BlackElo "2508"]
[Annotator "TA"]
[PlyCount "126"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,126,0,21,21,6,-33,-40,-50,-36,-37,-34,-64,-46,-44,-43,-43,-43,-43,-43,-43,-45,-93,0,-43,0,-74,-40,-47,-39,-45,-21,-18,-5,-31,32,30,33,26,135,123,147,89,195,192,221,213,221,225,316,285,484,494,373,266,780,142,146,143,326,315,299,185,206,202,279,264,261,191,175,0,0,0,0,0,0,0,0,-152,-48,-182,-146,-427,-410,-733,-149,-310,-250,-403,-418,-379,-347,-545,-454,-476,-475,-451,-412,-2251,-2389,-1540,-1393,-1039,-656,-621,-616,-768,-752,-723,-710,-973,-958]} 1. d4 Nf6 2. Bf4 d5 3. e3 c5 4. c3 Nc6 5. Nd2 Bf5 (5... e6 6. Ngf3 Bd6 7. Bg3 O-O 8. Bb5 a6 9. Bxc6 bxc6 10. Qa4 Rb8 11. Qa3 Bxg3 12. hxg3 cxd4 13. cxd4 a5 14. O-O Qb6 15. b3 Ba6 {1-0 (24) Carlsen,M (2840)-Anand,V (2779) Doha 2016}) 6. Qb3 {D00: 1 d4 d5: Unusual lines} Qd7 7. Ngf3 c4 8. Qd1 e6 9. Be2 h6 {LiveBook: 6 Games} 10. Ne5 Nxe5 11. dxe5 $146 (11. Bxe5 {keeps more tension.} Bd6 12. b3 cxb3 13. axb3 Bxe5 14. dxe5 Ne4 15. Nxe4 Bxe4 16. O-O) ({Predecessor:} 11. Bxe5 Be7 12. b3 cxb3 13. axb3 {1-0 (35) Berkes,F (2659)-Klek,H (2251) Schwarzach 2015}) 11... Ne4 12. Nxe4 Bxe4 13. O-O Bc5 14. Kh1 Qc6 15. b4 Bb6 16. a4 a5 17. b5 Qc7 18. Bf3 Bd3 {Strongly threatening ...g5.} 19. Be2 Be4 20. Bf3 Bd3 21. Be2 Bh7 22. Bg3 Bc5 23. Qd2 Qb6 24. Bd1 O-O-O 25. Bc2 h5 (25... Bxc2 $15 26. Qxc2 Kb8) 26. Bxh7 Rxh7 27. Bh4 Rg8 {[#]} (27... Rd7 $1 $11 {keeps the balance.}) 28. e4 $1 $16 {[%mdl 512]} Qc7 {White should prevent ...g5.} (28... dxe4 29. Qf4) 29. exd5 (29. f4 $142) 29... Qxe5 (29... g5 $16) 30. dxe6 $1 $18 Qxe6 31. Rad1 {And now Rfe1 would win.} Kb8 32. Rfe1 Qg4 (32... Qc8 $142 33. Qf4+ Ka7 34. Qxf7 Rf8) 33. Bg3+ Ka7 $2 (33... Ka8 {was worth a try.} 34. f3 Qc8) 34. Qd5 Qc8 35. Re4 h4 $2 (35... Bb6 36. Qxf7 (36. Rxc4 Qe6 $16) 36... Rf8) 36. Rxh4 $2 (36. Rxc4 $18 {and the rest is easy.} hxg3 37. Rxc5 Rxh2+ 38. Kg1) 36... Rxh4 $16 37. Bxh4 g5 $2 (37... f6 $16 38. Bg3 (38. Qxc4 Bb6 $16) 38... Bb6) 38. Bxg5 $18 Bxf2 39. Qxf7 Bb6 40. Qd5 Qg4 41. Be7 $1 Ka8 42. h3 Rh8 43. Kh2 $2 ({Only move:} 43. Bd6 $18) 43... Qf4+ $11 44. Kh1 {Qf3 is the strong threat.} Qe3 $40 {[%mdl 128] ( -> ...Rxh3+!). Black attacks.} 45. Qd7 {Threatens to win with Bf6.} Qxc3 46. Qe6 Ka7 47. Bf6 $2 {[#]} (47. h4 $11) 47... Qc2 ({Black should play} 47... Rxh3+ $1 $17 48. Qxh3 Qxf6) 48. Qd5 {[#]} ({Better is} 48. Ra1 $15 Qg6 49. Re1 (49. g3 $2 Re8 $19)) 48... Rf8 $1 $19 {[%cal Rf8f6]} 49. Be7 $2 {[%mdl 8192]} (49. Rd2 $17 Qb1+ 50. Rd1) 49... Rf5 50. Qd7 (50. Qd6 $142 Qxa4 51. Bd8 Qxb5 52. g4) 50... Qxa4 $2 (50... Rf7 $19 {and Black stays clearly on top.} 51. Ra1 Rg7) 51. Bd8 $2 (51. Rc1 $17 {was the only defense.} Rxb5 52. Qc8) 51... Qxb5 52. Bxb6+ $2 (52. Qxb5 Rxb5 53. Bf6) 52... Kxb6 {[%mdl 4096] Endgame KQR-KQR} 53. Qd4+ Ka6 54. Re1 (54. Rc1 $142 Rd5 55. Qxc4) 54... Qd5 55. Qh8 Ka7 56. Qb2 Rg5 57. Re2 (57. Qc2 $142 Ka6 58. Rf1) 57... Qd1+ {Black is clearly winning.} 58. Kh2 {[#]} c3 $1 {[%mdl 512]} 59. Qa2 (59. Qxc3 Qxe2) 59... Rc5 60. Rc2 {White hopes to continue with Rxc3!} Qd6+ 61. Kg1 Qd4+ 62. Kh2 Qe5+ 63. Kg1 Rb5 {Precision: White = 43%, Black = 42%.} 0-1

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.09"]
[Round "2"]
[White "Brattain, Mika A"]
[Black "Chandra, Akshat"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2364"]
[BlackElo "2484"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,115,14,6,0,0,0,0,0,0,0,0,0,94,92,113,84,84,84,84,84,79,80,81,79,75,61,50,57,57,43,97,87,112,113,126,126,135,133,135,83,136,143,141,137,122,15,15,15,15,15,23,9,9,9,9,9,9,9,9,9,9,9,9,0,34,34,34,0,34,9,9,9,9,0,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,0,34,34,34,0]} 1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 c5 5. O-O g6 6. b3 Bg7 7. Bb2 O-O 8. Nc3 d6 {[%cal Bd7d6,Bd6d5][%mdl 32]} 9. d4 cxd4 10. Nxd4 Bxg2 11. Kxg2 d5 {LiveBook: 16 Games} 12. e3 {A30: Symmetrical English: Double Fianchetto and Hedgehog} dxc4 13. Qf3 Na6 $1 {[#]} 14. Rfd1 $146 {The position is equal.} ({Predecessor:} 14. Ba3 cxb3 15. Nc6 Qd3 16. Rfd1 Qc4 17. Rac1 bxa2 18. Bxe7 a1=Q 19. Rxa1 Rfc8 20. Nxa7 Rxa7 21. Bxf6 Bxf6 22. Qxf6 {1-0 (30) Panchenko,A (2515)-Behnk,R (2320) Berlin 1993}) 14... Qc8 15. Rac1 Nc5 16. bxc4 Qb7 (16... e5 $11) 17. Qxb7 $16 Nxb7 18. Ba3 $36 {[%mdl 2048] White is on the roll.} Rfc8 19. Bxe7 Rxc4 20. Bxf6 Bxf6 21. Nd5 Rxc1 22. Nxf6+ Kg7 {[#]} 23. Nh5+ $1 {[%mdl 512]} gxh5 24. Rxc1 $14 {[%mdl 4096] Endgame KRN-KRN} Nc5 25. Rd1 Kf6 (25... Rc8 $14) 26. Nb5 $16 Ne6 27. Rd7 a6 {[#]} 28. Nc3 $1 b5 29. Nd5+ Kg6 30. f4 (30. h4 $142) 30... Nc5 (30... Kg7 $142) 31. Rd6+ Kg7 32. Rc6 Ne6 33. f5 (33. Kf3 $16) 33... Rd8 $11 34. fxe6 Rxd5 35. Rxa6 {next Ra7 is good for White.} fxe6 36. Rxe6 {KR-KR} Rd2+ 37. Kh3 Rxa2 38. Re5 b4 39. Rxh5 Re2 40. Rb5 Rxe3 41. Rxb4 Re2 42. g4 h6 (42... h5 $5) 43. Kg3 Ra2 44. Rd4 Rc2 (44... h5 $5) 45. Rd7+ Kf6 46. Rd6+ Kg7 47. Rd4 Ra2 (47... h5 $5) 48. h4 Ra7 49. Kf4 Rf7+ 50. Ke5 Re7+ 51. Kf5 Rf7+ 52. Ke6 {aiming for Rd7.} Rf6+ 53. Ke5 {Strongly threatening Rd7+.} Rf7 54. Rd6 Re7+ 55. Kf5 Rf7+ 56. Ke5 Re7+ 57. Re6 Ra7 58. Rd6 {Precision: White = 69%, Black = 57%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.10"]
[Round "3"]
[White "Li, Ruifeng"]
[Black "Tang, Andrew"]
[Result "1-0"]
[ECO "A01"]
[WhiteElo "2568"]
[BlackElo "2478"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,81,6,16,-10,-8,-12,-9,-8,-4,-6,-16,-9,0,-16,24,31,27,21,38,29,61,58,60,55,66,53,53,51,58,58,58,58,95,90,100,82,89,91,95,76,102,112,103,89,120,81,107,42,64,36,36,18,23,24,42,49,582,578,712,693,693,675,827,739,29996,29988,29989,29990,29992,29993,29993,29994,29994,29995]} 1. b3 d5 2. Bb2 c5 3. e3 Nc6 4. Nf3 Nf6 5. Bb5 Qb6 6. Be2 {A06: Réti Opening:1 Nf3 d5} (6. Na3 a6 7. Ba4 e6 8. O-O Be7 9. Ne5 O-O 10. Bxc6 bxc6 11. c4 a5 12. Qc2 Ne8 13. f4 f6 {0-1 (43) Zhao,X (2504)-Kosteniuk,A (2557) Batumi 2016}) 6... Bf5 7. O-O $146 ({Predecessor:} 7. d3 e6 8. Nbd2 Be7 9. O-O O-O 10. Nh4 Bg6 11. Rb1 Rad8 12. Re1 Qc7 13. Nxg6 hxg6 {0-1 (60) Christen,S (1843)-Biessner,E (1929) Goch 2012}) 7... e6 8. Nh4 {The position is equal.} Bg6 9. d3 Be7 10. Nd2 Qc7 11. f4 d4 {[#] And now ...Nd5 would win.} 12. e4 $1 Nd7 13. Qe1 Qd8 14. g3 {Strongly threatening f5.} Nf6 15. Qd1 {f5 is the strong threat.} h6 16. Nxg6 fxg6 17. Nc4 b5 18. Nd2 O-O 19. a4 a6 20. Bg4 $36 {[%mdl 2048] White has some pressure.} Qd7 21. Bh3 Rae8 22. axb5 axb5 23. Nf3 Kh7 24. Qe2 Bd8 25. Bc1 Qb7 26. Bd2 Bb6 27. Nh4 Bd8 28. e5 (28. Bg2 $16) 28... Nd5 $14 29. Nxg6 Kxg6 30. Qe4+ Kf7 31. f5 {[%cal Bf4f5,Bf5e6][%mdl 32]} Kg8 32. fxe6 Nce7 $2 {[%mdl 8192] [#]} (32... Ne3 $1 $14 33. Rf7 Rxf7 34. exf7+ Qxf7 35. Qxc6 Rxe5) 33. Bxh6 $1 $18 {[%mdl 512] Hoping for Rf7!} Nf5 (33... gxh6 34. Rf7) 34. Bxf5 {[%cal Bh3f5,Bf5g6,Bg6f7][%mdl 32] Black must now prevent Bg6.} gxh6 35. Bg6 Rxf1+ 36. Rxf1 Rf8 37. Rf7 {White mates.} Rxf7 38. Bxf7+ Kf8 39. Qh7 Qc6 40. Qxh6+ Ke7 41. Qg5+ {Precision: White = 69%, Black = 34%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.10"]
[Round "3"]
[White "Liang, Awonder"]
[Black "Checa, Nicolas D"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2536"]
[BlackElo "2415"]
[Annotator "TA"]
[PlyCount "143"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,143,1,6,1,17,13,16,16,21,0,24,2,0,10,3,-26,0,0,0,-39,-31,-37,-37,-35,8,20,15,18,39,0,-7,-10,-12,-37,8,0,0,0,28,0,0,0,0,0,2,-5,0,-28,-27,-41,-53,-50,-47,-106,-73,-98,-52,-58,-28,-27,-4,-8,13,0,0,0,0,-250,-222,-268,-185,-195,-200,-200,-192,-186,-170,-173,-170,-150,-31,-31,-31,-34,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qb3 e6 5. Bg5 Nbd7 6. Nc3 Qa5 7. Bd2 {White wants to play Nxd5. D43: Semi-Slav: 5 Bg5 h6} (7. cxd5 exd5 8. e3 Ne4 9. Bd3 Nxg5 10. Nxg5 Be7 11. Nf3 O-O 12. O-O Qd8 13. Qc2 g6 14. a3 a5 15. Rab1 Bd6 16. b4 axb4 17. axb4 {½-½ (44) Caruana,F (2770)-Kamsky,G (2741) Achaea 2012}) 7... Qb6 8. Qc2 Qc7 9. e4 dxe4 10. Nxe4 c5 $146 ({Predecessor:} 10... Nxe4 11. Qxe4 Nf6 12. Qh4 c5 13. Bd3 cxd4 {1-0 (32) Sergeev,V (2393)-Ivanitsky,I (2132) Ekaterinburg 2008}) 11. d5 Nxe4 12. Qxe4 Nf6 13. Qc2 exd5 14. cxd5 Be7 15. O-O-O O-O 16. Bc3 Qf4+ 17. Kb1 Bf5 18. Bd3 Bxd3 19. Rxd3 Nd7 20. Re1 Bf6 21. Bxf6 Qxf6 22. Rde3 Rfd8 23. h4 h6 24. g4 Nf8 25. Qxc5 Rac8 26. Qd4 (26. Qb5 {with more complications.} h5 27. gxh5 Qf5+ 28. Qd3 Rxd5 29. Qxf5 Rxf5 30. Rg1) 26... Qxd4 27. Nxd4 g6 $1 28. Re7 Rxd5 29. Nf3 Nd7 30. g5 h5 31. a3 Kf8 32. R1e3 ({White should play} 32. R7e3 $15) 32... a5 33. Ka2 a4 34. R7e4 $1 Nc5 35. Rb4 Rd1 36. Rc3 Rc6 37. Nd4 (37. Ne5 $5 {[%cal Re5c6]} Nb3 38. Rxa4 Nc1+ 39. Kb1 Ne2+ 40. Kc2 Nxc3 41. Ra8+ Ke7 42. Nxc6+ bxc6 43. Kxc3 $14) 37... Rc7 $1 38. f4 b6 39. Rbc4 $2 (39. f5 $11 {and White stays safe.}) 39... Rd7 $19 40. Nc2 Nb3 {Hoping for ...Nc1+.} 41. Rc8+ Kg7 42. Re3 {[#]} Rd8 $1 {[%cal Rd8c8]} 43. Rxd8 Rxd8 {[%mdl 4096] Endgame KRN-KRN} 44. Re1 Rd2 45. Ne3 Nc5 (45... Rh2 $17 46. f5 Rxh4 47. f6+ Kf8) 46. f5 $15 Nd3 47. f6+ Kf8 48. Nc4 {The position is equal.} Rxb2+ 49. Nxb2 Nxe1 50. Nxa4 $11 {KN-KN} Nf3 51. Nxb6 Nxh4 {[#] And now ...Nf3 would win.} 52. a4 {Strongly threatening a5.} Nf3 53. a5 {Intending a6 and mate.} Ne5 {White must now prevent ...h4.} 54. a6 {Threatening mate with a7.} Nc6 {Threatens to win with ...Nb4+.} 55. Kb3 h4 {aiming for ...h3.} 56. Nd7+ $1 Ke8 57. Ne5 $1 {[%cal Re5c6]} Na7 58. Kc4 h3 {...h2 is the strong threat.} 59. Ng4 Kd7 60. Kd5 Nc6 61. Ke4 Kc7 62. Kf3 Nd4+ 63. Kg3 Ne6 64. Kxh3 Nxg5+ 65. Kg3 Kb6 66. Kf4 Ne6+ 67. Ke5 Kxa6 68. Kd6 Ng5 69. Ke7 Nh7 70. Kxf7 Nxf6 71. Kxf6 g5 72. Kxg5 {Precision: White = 61%, Black = 63%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.10"]
[Round "3"]
[White "Brown, Michael William"]
[Black "Brattain, Mika A"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "2508"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,69,45,45,45,36,35,36,43,41,41,41,46,45,39,44,38,31,17,6,5,1,8,4,5,0,0,0,0,0,0,-11,0,0,0,-14,0,0,0,-52,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. Be3 Ng4 8. Bg5 f6 9. Bh4 g5 10. Bg3 Nh6 11. d5 Nd7 12. Nd2 f5 {E93: King's Indian: Classical: Petrosian System with 7...Nbd7} 13. exf5 (13. f3 Nf6 14. Bf2 g4 15. Qc2 gxf3 16. gxf3 fxe4 17. Ndxe4 Nf5 18. Rg1 Nd4 19. Qd3 Nxe2 20. Qxe2 {1-0 (67) Inarkiev,E (2664)-Amonatov,F (2592) St Petersburg 2015}) 13... Nf6 14. Nde4 Nxe4 {White is slightly better.} 15. Nxe4 Bxf5 16. Bd3 g4 17. O-O Bxe4 18. Bxe4 Qg5 19. Qd3 Nf5 20. f3 $146 ({Predecessor:} 20. c5 Kh8 21. cxd6 cxd6 22. f4 gxf3 23. Rxf3 Nxg3 24. Rxg3 Qh4 25. Qe2 {½-½ (25) De Blois Figueredo,A (2398)-Lara Ruiz,J (2363) ICCF email 2011}) 20... Nxg3 21. hxg3 gxf3 22. Bxh7+ Kh8 23. Be4 Qxg3 {[%csl Gf3][%cal Rg3g2] [#]} 24. Rxf3 Rxf3 25. Qxf3 Qxf3 26. Bxf3 $11 {[%mdl 4096] Endgame KRB-KRB} Rf8 (26... e4 $5 27. Bxe4 Re8 $11) 27. Re1 Bh6 28. Be4 Bf4 29. g4 Kg7 30. Rf1 ({Better is} 30. Kg2 $1 $11) 30... Be3+ (30... Kh6 $15) 31. Kg2 {The position is equal.} Rxf1 32. Kxf1 Kf6 33. Ke2 Bd4 34. b3 Kg5 35. Kf3 {Precision: White = 50%, Black = 80%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.10"]
[Round "3"]
[White "Chandra, Akshat"]
[Black "Troff, Kayden W"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2484"]
[BlackElo "2472"]
[Annotator "TA"]
[PlyCount "197"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,197,6,4,31,32,32,31,46,43,46,46,41,45,54,57,52,65,66,39,42,52,53,62,31,45,60,60,50,57,60,0,0,5,4,0,8,6,16,7,16,9,15,10,10,7,26,26,42,27,43,1,31,39,25,39,39,36,156,140,138,140,148,118,93,102,195,210,208,199,208,194,200,200,226,228,165,180,172,145,149,121,140,103,124,73,184,169,178,184,243,205,201,66,89,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 O-O 9. O-O Nc6 10. Qe2 Bg4 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} (10... Na5 11. Bb3 h6 12. Rfd1 Nxb3 13. axb3 Qe8 14. Nd2 b5 15. Nxb5 {½-½ (15) Andriasian,Z (2622)-Jurcik,M (2501) Minsk 2017}) 11. Rfd1 Rc8 12. h3 $146 ({Predecessor:} 12. Nd5 b5 13. Bb3 Nxd5 14. Bxd5 Na5 15. c3 Nc4 16. Bc1 Qa5 17. h3 Bh5 18. a4 Bxf3 19. Qxf3 bxa4 20. Qe2 Qb5 21. Qc2 Nb6 22. Be3 Nc4 23. Bc1 Nb6 24. Be3 Nc4 25. Bc1 {½-½ (25) Wittmann,W (2400)-Gostisa,L (2460) Bad Woerishofen 1993}) 12... Bd7 {White is slightly better.} 13. Nd5 Nxd5 14. Bxd5 Qc7 15. c3 Nd8 16. a4 Bc6 17. a5 Ne6 18. Ne1 Bxd5 19. Rxd5 Qc4 20. Qxc4 Rxc4 21. f3 f5 22. exf5 Rxf5 23. Nc2 Rf8 24. Rdd1 (24. Bb6 $14) 24... e4 $1 $11 25. fxe4 Rxe4 26. Rf1 Rxf1+ (26... Re8 {seems wilder.} 27. Rf3 Re5 28. Bb6 Ng5 29. Rff1 Ne4) 27. Kxf1 Nc5 28. Ke2 d5 29. Rd1 Na4 30. Rxd5 Nxb2 31. Kf3 Re6 32. Rd7 Bf6 33. Rxb7 Bxc3 34. Rb3 Bf6 35. Nd4 Bxd4 $1 36. Bxd4 $14 {[%mdl 4096] Endgame KRB-KRN} Nc4 37. Rb7 Rd6 ({Better is} 37... g6 $14) 38. Rxg7+ $16 Kf8 39. Rg4 {Threatens to win with Bc5.} Kf7 40. Rf4+ Kg6 41. Bc5 Rd3+ (41... Nd2+ $16 42. Ke2 Rd5) 42. Ke2 $1 $18 {[%cal Re2d3]} Rd2+ 43. Ke1 $1 Rc2 44. Kd1 Rc3 {aiming for ...Nb2+.} 45. Bb4 $1 {[%cal Rb4c3]} Ne3+ 46. Ke2 Rb3 47. Bd2 Nf5 48. Rc4 Kf6 49. g4 Nd6 50. Rc6 Ke5 51. h4 ({White should try} 51. Rxa6 {Black must now prevent h4.} Nc4 52. Bc1) 51... Nb5 (51... Ne4 $16) 52. Rxa6 Nd4+ {[#]} 53. Kd1 $1 Rh3 (53... Rg3 $142) 54. Ra8 {And now a6 would win.} Rxh4 {[#]} 55. a6 ({White must play} 55. Bc3 $1 $18 Ke4 56. Re8+ Kd3 57. Bxd4 Kxd4 58. a6 Rh1+ 59. Re1) 55... Nc6 $1 $14 56. a7 ({White should play} 56. Rg8 $16) 56... Nxa7 $1 $11 {The position is equal.} 57. Rxa7 Rxg4 58. Rxh7 {KRB-KR} Rg3 59. Ke2 Rb3 60. Be3 Rb2+ 61. Kf3 Rb4 62. Rh5+ Ke6 63. Ra5 Rc4 64. Bf2 (64. Bc1 $5) 64... Rb4 65. Be1 Rd4 66. Ke3 (66. Bd2 $5) 66... Rc4 67. Bd2 Rh4 68. Kd3 Rg4 69. Bc3 Rf4 70. Bd4 Rf5 71. Ra8 Rf4 72. Kc4 Rf7 73. Ra5 Rc7+ 74. Kd3 Rh7 75. Rg5 Kd6 76. Kc4 Rc7+ 77. Bc5+ Ke6 78. Kd4 Rh7 79. Re5+ Kf6 80. Kd5 Rb7 81. Re1 Rb5 82. Rf1+ Kg5 83. Kd4 Rb2 84. Be7+ Kg4 85. Ke3 Rb6 86. Rg1+ (86. Bd6 $5) 86... Kh5 87. Kf4 Rb2 88. Bc5 {Kf5 is the strong threat.} (88. Ba3 {with more complications.} Rc2 89. Rg5+ Kh6 90. Kf5 Rf2+ 91. Kg4) 88... Rb3 (88... Rb7 {is interesting.} 89. Rg5+ Kh6 90. Bf8+ Kh7 91. Ke3 Rc7) 89. Rg8 Rb1 90. Rg5+ (90. Rg1 {feels hotter.} Rb3) 90... Kh6 91. Rg2 Rf1+ 92. Bf2 Rb1 93. Kf5 (93. Be1 $5) 93... Rf1 94. Kf6 {[%cal Rg2h2]} Kh7 95. Rh2+ Kg8 96. Kg6 {White wants to mate with Bd4.} Rd1 97. Bc5 {Intending Ra2 and mate.} Rd6+ 98. Kf5 Rd5+ 99. Ke4 {Precision: White = 71%, Black = 62%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.10"]
[Round "3"]
[White "Liu, Bovey"]
[Black "Colas, Joshua"]
[Result "1-0"]
[ECO "B28"]
[WhiteElo "2228"]
[BlackElo "2366"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,73,31,37,33,98,97,100,83,95,95,105,104,110,100,104,39,57,31,68,79,173,175,176,133,442,460,439,433,1030,1034,1000,286,284,283,284,275,281,283,289,285,283,279,303,317,331,254,276,261,256,266,304,305,321,324,416,411,416,411,388,363,490,487,654,620]} 1. e4 {[%cal Be2e4,Be4e5][%mdl 32]} c5 2. Nf3 a6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. cxd4 e6 {LiveBook: 14 Games. B28: Sicilian: 2 Nf3 a6 (O'Kelly Variation)} (6... Nc6 7. Nc3 Nxc3 8. bxc3 d6 9. Bf4 Qa5 10. Qd2 d5 11. Be2 Bg4 12. O-O e6 13. h3 Bxf3 14. Bxf3 {0-1 (60) Babujian,L (2465)-Kalashian,D (2358) Yerevan 2016}) 7. Bc4 b5 (7... Nc6 $14) 8. Bxd5 $16 exd5 {White is better.} 9. Nc3 $146 ({Predecessor:} 9. O-O d6 10. Nc3 Bb7 11. Re1 Be7 12. exd6 Qxd6 13. Bg5 Nc6 14. Qe2 {0-1 (41) Heimbaecher,P (1927)-Bacallado Rivero,D Cotelec 2009}) 9... Bb7 10. O-O Be7 11. Re1 b4 12. Ne2 O-O 13. Nf4 (13. Ng3 $16) 13... a5 $1 $14 14. Nd2 Qb6 15. Nf1 Na6 (15... Bd8 $16) 16. Ne3 $18 Nc7 17. Qg4 $36 {[%mdl 2048] [#] Threatens to win with Nf5. White is on the roll.} Rfd8 $2 {[%mdl 8192]} (17... g6 $16) 18. Nf5 {[%csl Gf5][%cal Rg4g7]} Bf8 19. Re3 Ne8 (19... Re8 $142 20. Nxg7 Bxg7) 20. Rh3 Ra6 {[#]} 21. Nh6+ $2 (21. e6 $1 {[%mdl 512] Threatening mate with Qh5.} g6 (21... dxe6 22. Nh6+) 22. Qh4) 21... Qxh6 22. Rxh6 Rxh6 23. Nxd5 Rg6 24. Qh4 Rc8 25. Nf4 Rgc6 26. Be3 Rc2 27. Qg4 Bc6 28. Qd1 Bb5 29. Rc1 Rxc1 30. Bxc1 a4 31. Bd2 Rc4 32. Be1 b3 33. axb3 axb3 34. Bc3 Ra4 35. h4 Nc7 36. Qxb3 Ra1+ 37. Kh2 {Precision: White = 73%, Black = 33%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.11"]
[Round "4"]
[White "Li, Ruifeng"]
[Black "Chandra, Akshat"]
[Result "1/2-1/2"]
[ECO "A01"]
[WhiteElo "2568"]
[BlackElo "2484"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,65,21,22,25,25,15,40,25,42,37,26,33,29,37,41,16,20,16,18,12,18,29,27,8,6,6,6,14,10,11,0,0,0,0,0,-14,0,0,0,-7,0,0,0,0,0,0,0,0,0,-6,0,0,0,0,0,0]} 1. b3 e5 2. Bb2 Nc6 3. Nf3 d6 4. e3 g6 5. d4 Bg7 6. dxe5 Nxe5 7. Nxe5 {A01: Nimzowitsch-Larsen Opening} Bxe5 8. Nc3 Be6 $146 ({Predecessor:} 8... Bd7 9. Qd2 Bc6 10. O-O-O Qe7 11. f4 Bg7 12. e4 Nf6 13. Bd3 O-O-O 14. Rde1 Kb8 {½-½ (14) Wirig,A (2488)-Renet,O (2480) Saint-Quentin 2014}) 9. Qd2 {White is slightly better.} Qd7 10. e4 Ne7 11. O-O-O O-O-O 12. f4 Bg7 13. g3 (13. Qe3 $5 {[%cal Re3a7]} Kb8 14. Nb5 Bxb2+ 15. Kxb2 $11) 13... Kb8 14. Bg2 Bh3 15. Kb1 Bxg2 16. Qxg2 Rhe8 17. e5 Qc6 {The position is equal.} 18. Qxc6 Nxc6 19. exd6 Rxd6 20. Rxd6 cxd6 21. Rd1 Bxc3 22. Bxc3 $11 {[%mdl 4096] Endgame KRB-KRN} Kc7 23. Rd2 f5 24. a4 Re4 25. Kb2 Kd7 26. Bg7 Re7 27. Bf8 Re6 28. c4 b6 29. Bg7 a5 30. Bc3 Kc7 31. Kc2 Nb8 32. Rd1 Na6 33. Re1 {Precision: White = 68%, Black = 76%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.11"]
[Round "4"]
[White "Tang, Andrew"]
[Black "Checa, Nicolas D"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2478"]
[BlackElo "2415"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,90,2,26,0,0,0,0,-68,-7,-23,-6,-53,0,2,3,-50,-57,-40,-40,-71,-17,-19,-9,-31,-35,-20,2,-5,0,0,0,0,14,13,51,33,67,31,45,0,6,-61,-61,-60,-52,-66,-63,-58,-66,-71,-71,-450,-450,-443,-435,-420,-420,-404,-389,-377,-364,-308,-148,-150,-158,-161,-129,-133,-104,-112,-112,-29983,-29984,-29982,-29983,-29980,-29981]} 1. d4 d5 2. Bf4 Nf6 3. e3 Bg4 4. Nf3 e6 5. Nbd2 c5 6. c3 Nc6 7. Qb3 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} Qc8 8. h3 Bh5 {LiveBook: 5 Games} 9. g4 {White has an edge.} Bg6 10. Ne5 $146 ({Predecessor:} 10. Nh4 Be4 11. f3 Bg6 12. Be2 Be7 13. Bg3 a6 14. Kf2 b5 {½-½ (68) Naiditsch,A (2702)-Meier,G (2621) Karlsruhe 2017}) 10... Nxe5 11. dxe5 (11. Bxe5 $11 c4 12. Qa4+ Qd7 13. Qxd7+ Nxd7 14. Bg3) 11... Nd7 (11... c4 $15 12. Qa4+ Nd7) 12. c4 $1 $11 {[%cal Rc4d5]} dxc4 $1 13. Bxc4 Be7 (13... a6 $1 $15) 14. h4 {Threatens to win with h5.} h5 15. gxh5 (15. g5 $11) 15... Bxh5 $15 16. f3 a6 17. a4 {[#]} Qc7 (17... b5 $1 $17 {[%mdl 512]} 18. axb5 axb5 19. Rxa8 Qxa8 20. Bxb5 Bxf3 21. Nxf3 Qxf3 22. Bxd7+ Kxd7 23. Qa4+ Kc7 24. Qa7+ Kc8) 18. Be2 $11 Nb6 19. Ne4 c4 20. Rc1 {[%cal Re2c4]} Rc8 21. Qa2 a5 22. Kf2 O-O 23. Nd6 Bxd6 24. exd6 Qc5 {Black wants to play ...e5.} 25. Rhg1 {Hoping for Rg5.} f6 26. b3 Kh8 27. Bxc4 e5 28. Bf7 (28. Be6 $11 Qxc1 29. Rxc1 Rxc1 30. Qd2) 28... Qxd6 $15 29. Rgd1 Qe7 30. Rxc8 Rxc8 31. Bxh5 exf4 32. Qd2 $1 {Black should prevent Bg6.} Qe5 $36 {[%mdl 2048] Keeping White busy.} 33. Bg6 $2 {[%mdl 8192]} (33. Bf7 $17 {is more resistant.} Rf8 34. Bc4 Nxc4 35. bxc4) 33... fxe3+ $19 34. Qxe3 Qh2+ 35. Ke1 Qh1+ 36. Ke2 Qg2+ 37. Ke1 Qxg6 38. Qxb6 {[%mdl 4096] Endgame KQR-KQR} Re8+ (38... Rc3 $19 39. Qd8+ Kh7) 39. Kf1 $17 Qf5 40. Qf2 Qh3+ 41. Kg1 Re5 42. Rd4 Qe6 {aiming for ...Re1+.} 43. Qc2 $2 {[%mdl 8192] [#]} (43. Rd8+ $17 Kh7 44. Qc2+ f5 45. Rd2) 43... Re1+ {Black mates.} 44. Kf2 Qe3+ 45. Kg3 Qxd4 {Precision: White = 47%, Black = 60%.} 0-1

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.11"]
[Round "4"]
[White "Troff, Kayden W"]
[Black "Brown, Michael William"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "2472"]
[BlackElo "2508"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,61,29,45,26,38,30,29,0,0,0,33,35,37,31,36,25,28,9,18,0,0,0,0,0,0,-24,0,0,0,0,11,-140,-131,-144,-44,-22,83,-224,29992,29993,29993,29994,29994,29995,29995,29996]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. Qc2 Be6 7. e3 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2)} Nbd7 (7... h6 8. Bh4 Nbd7 9. Bd3 g5 10. Bg3 Nh5 11. Nge2 Nxg3 12. Nxg3 h5 13. Bf5 Qf6 14. O-O-O h4 15. Bxe6 fxe6 {0-1 (46) Klekowski,M (2467)-Nabaty,T (2636) Ordu 2017}) 8. Bd3 Bd6 9. Nge2 h6 {LiveBook: 3 Games} 10. Bh4 Qc7 11. Bg3 Bxg3 12. hxg3 $146 ({Predecessor:} 12. Nxg3 h5 13. h3 O-O-O 14. b4 Kb8 {½-½ (49) Rakay,K (2420)-Babychuk,V (2124) ICCF email 2012}) 12... Nb6 13. Nf4 O-O-O 14. a4 {[%cal Ba2a4,Ba4a5,Ba5a6][%mdl 32]} Kb8 15. a5 Nc8 16. a6 {Black must now prevent axb7.} b6 17. Nxe6 (17. Rc1 {is more complex.} Qd6 18. Be2 Ne7 19. Nd3 Bf5 20. Qa4) 17... fxe6 18. Rc1 {Hoping for Nb5!} Ne7 19. O-O Qd6 20. e4 dxe4 21. Bxe4 h5 22. Rfe1 h4 23. gxh4 Ng4 {...Qh2+ is the strong threat.} 24. Bf3 $2 (24. g3 $11) 24... Qh2+ $17 ({Weaker is} 24... Rxh4 25. g3 $14) 25. Kf1 {[%cal Bg1f1,Bf1e2,Be2d1][%mdl 32]} Nf5 ({Stronger than} 25... Rxh4 26. Rxe6 Qf4 27. Rxe7 $11) (25... Qxh4 $17 {Strongly threatening ...Nh2+.} 26. Re4 Nh2+ 27. Ke2 Qf6) 26. Re4 $1 $15 {[%cal Re4g4]} Nf6 {[#]} (26... Rxh4 27. Nb5 $18) (26... Nxd4 $11 {keeps the balance.} 27. Rxd4 Rxd4) 27. Nb5 $2 {[%mdl 8192]} (27. g3 $1 $16 {stays on course.}) 27... Nxe4 $4 {[%mdl 8192]} ({Inferior is} 27... cxb5 {[#]} 28. Qc6 $1 $16 {[%mdl 512]}) (27... Rc8 $19 28. Rxe6 Qh1+ 29. Ke2 cxb5 30. Rxb6+ axb6 31. Qxc8+ Rxc8 32. Rxh1 Rc2+ 33. Kd3 Rxb2) 28. Qxc6 {[%csl Ga6][%cal Rc6b7] White mates.} Nd2+ 29. Ke2 {[%csl Ga6,Gf3][%cal Rc6b7]} Nxd4+ 30. Nxd4 {[%csl Ga6,Gf3][%cal Rc6b7]} Qe5+ 31. Kd1 {Precision: White = 48%, Black = 46%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.11"]
[Round "4"]
[White "Colas, Joshua"]
[Black "Liang, Awonder"]
[Result "0-1"]
[ECO "E52"]
[WhiteElo "2366"]
[BlackElo "2536"]
[Annotator "TA"]
[PlyCount "66"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,66,0,0,-8,-9,-12,-1,-19,21,28,52,31,52,39,49,25,37,25,22,0,0,0,0,0,23,-26,-20,-78,-48,-16,-49,-19,0,-16,-10,-19,21,-29,-25,-42,-77,-337,-336,-344,-313,-6308,-4885]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. Nf3 b6 7. O-O Bb7 8. cxd5 exd5 9. a3 Bd6 10. b4 a6 11. Bb2 Nbd7 12. b5 {E52: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5 6 Bd3 b6} axb5 13. Nxb5 Be7 14. Ne5 $146 {The position is equal.} ({Predecessor:} 14. Qc2 c6 15. Nc3 c5 16. Ne5 c4 17. Bf5 g6 18. Bh3 Re8 19. f4 Bf8 {½-½ (49) Knoll,H (2225)-Farago,I (2440) Oberwart 1997}) 14... c5 15. a4 Re8 16. f4 cxd4 17. exd4 Ne4 18. Rc1 {[#] Nxd7 is the strong threat.} ({Much weaker is} 18. Bxe4 dxe4 19. Rc1 (19. Qh5 Rf8 $15) 19... Nxe5 $11) 18... Rc8 19. Rxc8 Qxc8 20. Bxe4 dxe4 21. Qb3 Nxe5 22. fxe5 Rf8 23. Rc1 Qg4 24. h3 (24. Qd1 $11 {keeps the balance.} Qxd1+ 25. Rxd1) 24... Qe2 (24... Qg5 $5 {[%cal Re4e3]} 25. Qd1 e3 $17) 25. Qc2 Qe3+ 26. Qf2 $1 {[%cal Rf2e3]} Qb3 27. Qc2 Qe6 28. Qe2 Bg5 29. Rc2 Qb3 {And now ...Be3+ would win.} 30. Bc1 e3 31. Rb2 $2 {[%mdl 8192]} (31. Qc4 $17 Qxc4 32. Rxc4) 31... Qxa4 $19 32. Ra2 Qb4 {[#] Threatens to win with ...Rc8.} 33. Ba3 $2 (33. Nd6 Bd5 34. Rc2 Qxd4 35. Bb2) 33... Qb1+ {Precision: White = 20%, Black = 56%.} 0-1

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.11"]
[Round "4"]
[White "Brattain, Mika A"]
[Black "Liu, Bovey"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2364"]
[BlackElo "2228"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,91,13,0,14,2,14,0,0,0,0,0,0,0,0,-26,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. d4 O-O 7. Nc3 Ne4 8. Bd2 d5 9. cxd5 exd5 10. Bf4 Nd7 {[%cal Bb8d7,Bd7f6,Bf6e4][%mdl 32]} 11. Qb3 Ndf6 12. Rac1 c5 {E18: Queen's Indian: Old Main Line (4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3)} 13. dxc5 Nxc5 (13... Bxc5 14. Nb5 Ng4 15. Nbd4 g5 16. Be3 Qf6 17. Rcd1 Nxe3 18. fxe3 Rad8 19. Qa4 a6 20. Nd2 {0-1 (42) Grischuk,A (2737)-Korobov,A (2692) Doha 2016}) 14. Qd1 Nfe4 15. Be5 {LiveBook: 3 Games} Re8 16. Nb5 Bf8 $1 17. Bf4 $146 ({Predecessor:} 17. Nbd4 g5 18. g4 h5 19. h3 hxg4 20. hxg4 {1-0 (76) Martinovic,S (2445)-Enders,P (2490) Wattens 1999}) 17... Ne6 18. Be3 Qd7 19. Nfd4 Nxd4 20. Nxd4 Bc5 21. Nc2 Bxe3 22. Nxe3 {The position is equal.} Rad8 23. Qd4 Nc5 24. Rfd1 {[%cal Re3d5]} Ne6 25. Qg4 d4 26. Bxb7 Qxb7 27. Nf5 {[%cal Rf5d4]} g6 {[#] And now ...h5 would win.} 28. Nxd4 Nxd4 29. Rxd4 Rxd4 30. Qxd4 Rxe2 $11 {[%mdl 4096] Endgame KQR-KQR} 31. h4 h5 32. Qd8+ Kg7 33. Qd4+ Kg8 34. Qf6 Re6 35. Qd8+ Kg7 36. Qd4+ Kh7 37. Kh2 Re2 38. Qf6 Qe7 (38... Qd7 {keeps more tension.} 39. a3 Re4 40. b4 Kg8 41. Rc2 Re1) 39. Qxe7 Rxe7 {KR-KR} 40. Kg2 Re2 41. Rc7 Kg7 42. Rxa7 Rxb2 43. Kf3 b5 44. Ke3 b4 45. f3 b3 46. axb3 {Precision: White = 85%, Black = 90%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.12"]
[Round "5"]
[White "Liang, Awonder"]
[Black "Brattain, Mika A"]
[Result "1-0"]
[ECO "B10"]
[WhiteElo "2521"]
[BlackElo "2368"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,73,29,29,39,15,7,10,42,37,29,33,52,48,54,59,53,53,54,43,56,56,55,55,48,0,0,0,0,13,17,7,14,9,18,0,42,42,42,42,42,42,54,42,264,245,389,385,385,383,360,368,365,350,470,466,440,431,543,531,674,450,431,449,814,807]} 1. e4 c6 2. Nc3 d5 3. Nf3 dxe4 4. Nxe4 Nf6 5. Qe2 Nxe4 6. Qxe4 Qd5 {B11: Caro-Kann: Two Knights Variation} 7. Qh4 Qe6+ 8. Be2 Qg4 {The position is equal.} 9. Qg3 Qxg3 10. hxg3 Bf5 11. b3 Nd7 12. Bb2 h6 13. O-O-O e6 {[#]} 14. Rde1 $146 ({Predecessor:} 14. Nh4) 14... Rg8 15. Nh4 Bh7 16. Bh5 Ke7 17. Re3 (17. f4 $5 {[%cal Rf4f5]}) 17... Nf6 18. Bxf6+ gxf6 19. g4 Rg5 20. f4 $36 {[%mdl 2048] White has some pressure.} Ra5 21. Kb1 Rd5 22. d3 Rd7 23. f5 {Bxf7! is the strong threat.} e5 24. Nf3 Kd8 25. Nd2 Bc5 26. Rf3 {Hoping for Ne4.} (26. Rg3 $5 {[%cal Rd2e4]} Bf8 27. Ne4 $14) 26... Ke7 $2 (26... Bg8 $14) 27. Ne4 $18 Bb6 {[#]} (27... Ba3 {was called for.} 28. g5 fxg5) 28. Bxf7 $1 {[%mdl 512]} Kxf7 29. Rxh6 Bg8 30. Rxf6+ ({Weaker is} 30. Nxf6 Rd4 $16) 30... Ke7 31. Rh6 Rf8 32. g5 {[%cal Bg4g5,Bg5g6,Bg6f7][%mdl 32] White is clearly winning.} Bd5 33. f6+ Ke8 {If only Black now had time for ...Bxe4....} 34. g6 Bd8 35. f7+ Bxf7 36. gxf7+ Ke7 (36... Rfxf7 $142 37. Nd6+ Rxd6 38. Rxd6 Rxf3 39. gxf3 Ke7) 37. Rhf6 {Precision: White = 89%, Black = 43%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.12"]
[Round "5"]
[White "Chandra, Akshat"]
[Black "Tang, Andrew"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2493"]
[BlackElo "2461"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,115,35,-5,39,21,79,78,126,43,31,29,35,33,41,38,42,41,35,33,117,118,105,120,114,113,114,110,124,115,125,107,106,99,92,85,66,78,104,44,78,83,64,52,193,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,8,43,43,49,49,49,49,49,56,54,29,29,30,36,6,6,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O Be7 5. c4 O-O 6. d4 c6 {[%cal Bc7c6,Bc6c5][%mdl 32]} 7. Qc2 Nbd7 8. Rd1 b6 9. b3 Ba6 10. Nbd2 {[%cal Bb1d2,Bd2c4,Bc4e5][%mdl 32]} Rc8 11. e4 c5 12. exd5 exd5 13. Qf5 {LiveBook: 20 Games. E09: Closed Catalan: Main Line: 7 Qc2 c6 8 Nbd2} (13. Nf1 Re8 14. Ne3 Bb7 15. Bb2 Bf8 16. Ne5 Rc7 17. Nxd5 Nxd5 18. cxd5 Qa8 19. Nxd7 Rxd7 20. dxc5 Bxc5 {½-½ (69) Macieja,B (2583)-Kovalyov,A (2617) Santa Clara 2014}) 13... dxc4 (13... g6 $5 {[%cal Rg6f5]} 14. Qd3 Re8 $11) 14. Nxc4 b5 (14... g6 $11 15. Qh3 Bb7) 15. Nce5 $16 {White is better.} c4 16. bxc4 (16. d5 $1 $16) 16... bxc4 $14 17. d5 Nxe5 18. Nxe5 c3 $146 ({Predecessor:} 18... Nxd5 19. Bxd5 c3 20. Qc2 Bc5 {½-½ (28) Bagaturov,G (2449)-Idani,P (2448) Yerevan 2012}) 19. Qc2 $1 Bc5 20. Bg5 {Black must now prevent Nc6.} Re8 21. Nc6 Qd6 {[#]} (21... Re2 $1 $14 22. Qxc3 Qd6) 22. Bf4 $1 $16 {[%cal Rf4d6]} Qd7 23. Qxc3 Bb6 24. Be3 Bxe3 25. fxe3 {[%cal Bf2e3,Be3e4][%mdl 32]} Ng4 26. e4 Be2 27. Re1 Bb5 {[%cal Rb5c6]} 28. e5 $36 {[%mdl 2048] White is in control.} Qc7 29. Qc5 Bxc6 30. dxc6 ({Weaker is} 30. Qxc6 Qa5 $19) 30... Rxe5 31. Qd4 (31. Rxe5 $16 Nxe5 32. Rb1) 31... Qe7 32. Rxe5 Nxe5 33. Rb1 Rd8 {[#]} ({Black should try} 33... g6 $14) 34. Rb7 $2 (34. Qc3 $1 $18 Qc7 35. Rb7) 34... Qf6 $11 35. Qf4 Rd1+ 36. Bf1 Nxc6 37. Rc7 {Threatens to win with Rxc6!} Qxf4 38. gxf4 {[%mdl 4096] Endgame KRB-KRN} Nd8 39. Rxa7 g6 40. Kf2 Ne6 41. Bc4 Rd2+ 42. Kg3 Rd4 43. Bxe6 fxe6 {KR-KR} 44. a4 {[%cal Ba2a4,Ba4a5,Ba5a6][%mdl 32]} e5 45. fxe5 Re4 46. Ra5 Kf7 47. Kf3 Rh4 48. Ra8 {a5 is the strong threat.} Ke6 $1 49. a5 Kxe5 50. a6 Rf4+ $1 51. Kg3 Rf7 $1 {The position is equal.} 52. a7 {White wants to mate with Re8+.} Kf5 53. h4 h5 54. Kf3 {And now Kg3 would win.} Ke5+ 55. Kg3 {White threatens Re8+ and mate.} (55. Ke2 $5 {[%cal Ra8e8]} Kf4 56. Kd3 $11) 55... Kf5 56. Kf3 $1 {[%cal Rf3g3] Strongly threatening Kg3.} Ke5+ 57. Ke3 {Intending Re8+ and mate.} (57. Ke2 $5 {[%cal Ra8e8]} Kf4 58. Kd3 $11) 57... Kf5 58. Kf3 {Precision: White = 63%, Black = 67%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.12"]
[Round "5"]
[White "Brown, Michael William"]
[Black "Li, Ruifeng"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "2489"]
[BlackElo "2571"]
[Annotator "TA"]
[PlyCount "123"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,123,29,44,28,34,28,61,41,68,0,0,0,0,-10,0,0,0,0,0,0,0,0,0,0,22,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-25,0,0,0,-25,0,0,0,-14,-8,-21,83,83,107,81,137,140,121,113,139,156,152,139,148,142,155,151,225,169,163,154,159,160,156,158,224,212,219,237,229,223,197,16,22,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 d6 6. g3 b6 7. Bg2 Bb7 8. O-O Bxc3 9. Qxc3 Nbd7 10. b3 Re8 {E32: Nimzo-Indian: Classical (4 Qc2): 4...0-0} 11. Bb2 Be4 {LiveBook: 3 Games} 12. Rad1 c6 $146 {White has an edge.} ({Predecessor:} 12... Qe7 13. Rfe1 c5 14. Bh3 Rad8 15. Nd2 Bb7 16. e4 {½-½ (32) Nogueiras Santiago,J (2565)-Rodriguez Cespedes,A (2495) Granma 1987}) 13. Bh3 d5 14. cxd5 Nxd5 15. Qd2 (15. Qxc6 $14 Rc8 16. Qa4) 15... Bxf3 $11 16. exf3 N7f6 17. Rfe1 Qd6 18. f4 g6 19. Bg2 a5 20. a3 Kg7 21. Rc1 h5 22. Rc4 Ra7 23. Rec1 Rc7 24. Qc2 {[%cal Rc4c6]} Rec8 25. h4 Ng4 26. Bf3 Nh6 27. Qe4 Nf5 28. Qe1 Kg8 29. R4c2 Qe7 30. Qe5 Qd6 31. Qe1 Kh7 32. Bg2 Rd7 33. Rd1 Rg8 34. Rdc1 Rc8 35. Rd1 Rg8 36. Rdc1 Rc7 37. Re2 Rd8 38. Rd2 Nxf4 (38... Qd7 $11 {remains equal.}) 39. gxf4 $16 Qxf4 40. Rd3 Nxh4 (40... Nxd4 $142 41. Qe3 Qxe3 42. Rxe3 c5) 41. Bh1 Nf5 {[%cal Rf5d4]} 42. Qe4 Qxe4 43. Bxe4 Ne7 44. Bg2 Nd5 45. Rd2 Rd6 46. Rdc2 f5 (46... f6 $16 47. a4 Nb4) 47. Bxd5 exd5 48. b4 axb4 49. axb4 b5 {[#]} 50. Rc5 $1 Re6 (50... Ra7 $16 {might work better.}) 51. Kf1 $18 h4 {[#]} 52. Rxd5 $1 {[%mdl 512]} cxd5 53. Rxc7+ {[%mdl 4096] Endgame KRB-KR} Kh6 54. Kg2 $2 ({Better is} 54. Rc5 $18) 54... g5 $11 {[%cal Bg6g5,Bg5g4][%mdl 32] The position is equal.} 55. Kf3 g4+ 56. Kg2 f4 57. Bc1 Re4 58. Rf7 Kg5 59. Rg7+ Kf5 60. Rf7+ Kg5 61. Rg7+ Kf5 62. Rf7+ {Precision: White = 66%, Black = 56%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.12"]
[Round "5"]
[White "Checa, Nicolas D"]
[Black "Colas, Joshua"]
[Result "1-0"]
[ECO "E16"]
[WhiteElo "2415"]
[BlackElo "2369"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,111,39,36,33,41,34,33,19,45,23,21,27,44,0,0,0,0,0,23,18,50,14,17,13,12,7,14,11,32,8,14,8,8,8,6,6,8,8,10,0,0,0,0,0,21,0,0,0,0,0,5,0,247,253,316,316,497,510,510,507,505,508,504,504,477,466,480,431,828,826,807,796,795,793,799,620,475,376,5073,4133,29970,29972,29972,29971,29971,29972,29972,29973,29973,29974,29975,29973,29977,29978,29977,29974]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Bb4+ 6. Bd2 c5 7. Bxb4 cxb4 8. O-O a5 {E16: Queen's Indian: 4 g3 Bb7 5 Bg2 Bb4+} (8... O-O 9. Qb3 a5 10. a3 Na6 11. Nbd2 d6 12. Rfd1 Qd7 13. Qd3 Rfe8 14. Ne1 Bxg2 15. Kxg2 Qc7 16. Nc2 bxa3 17. bxa3 Nb8 18. Rab1 Nbd7 19. e4 e5 {1-0 (55) Vidit,S (2689)-Akopian,V (2675) Doha 2016}) 9. a3 Na6 {LiveBook: 16 Games} 10. Qd3 O-O {White is slightly better.} 11. Nbd2 d6 12. e4 $146 ({Predecessor:} 12. Ne1 Bxg2 13. Nxg2 e5 14. Ne4 Re8 15. dxe5 Nxe4 16. Qxe4 bxa3 17. bxa3 Rxe5 18. Qf3 Rc8 19. Ne3 Nc5 {½-½ (19) Manninen,M (2380)-Kochyev,A (2435) Helsinki 1997}) 12... Re8 13. Nh4 e5 14. Nf5 Qc7 15. f4 {[#] aiming for fxe5.} (15. g4 $5) 15... exd4 $1 16. Qxd4 Rad8 17. Rfe1 Bc8 18. Ne3 Qc5 19. Qxc5 (19. Nb3 $5 {[%cal Rb3c5]} Qc7 20. Nd5 Nxd5 21. cxd5 $14) 19... Nxc5 20. Nd5 Nxd5 21. cxd5 bxa3 22. bxa3 b5 23. Rab1 Bd7 24. Bf1 Rb8 25. e5 dxe5 26. fxe5 b4 27. axb4 axb4 28. Re3 Bf5 29. Rc1 Nd7 30. Rce1 Bc2 31. e6 fxe6 32. dxe6 Nf6 $1 33. e7 $36 {[%mdl 2048] Bc4+ is the strong threat. White has some pressure.} g6 34. Bg2 {Strongly threatening Bc6.} Rb6 $2 (34... Rec8 $11 {and Black is okay.}) 35. Nc4 $18 Rbb8 36. Nd6 b3 (36... Ba4 $142 37. Rb1 Kg7 38. Nxe8+ Bxe8) 37. Nxe8 Nxe8 38. Be4 Bxe4 39. Rxe4 {[%mdl 4096] Endgame KRR-KRN} b2 40. Rb1 Kf7 41. Re2 Nf6 42. Rbxb2 Rxb2 (42... Re8 $142 43. Rb7 Nd5) 43. Rxb2 Kxe7 {KR-KN} 44. Rb7+ Ke6 45. Kg2 g5 46. Kf3 Kf5 47. Rg7 h5 $2 (47... h6 48. Ra7 Kg6) 48. h4 gxh4 49. gxh4 {White mates.} Ne4 50. Ke3 Kf6 51. Ra7 Ng3 52. Kf4 Ne2+ {[#]} 53. Kf3 $1 Nc3 54. Ra6+ Kg7 55. Kf4 Ne2+ 56. Kg5 {Precision: White = 65%, Black = 49%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.12"]
[Round "5"]
[White "Liu, Bovey"]
[Black "Troff, Kayden W"]
[Result "0-1"]
[ECO "B51"]
[WhiteElo "2218"]
[BlackElo "2482"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,72,10,10,9,7,31,-7,-17,-48,-58,-63,-63,-80,-68,-66,-46,-63,-46,-63,-74,-68,-48,-52,-52,-52,-52,-51,-51,-54,-48,-74,-73,-129,-126,-130,-143,-132,-76,-164,-145,-160,-170,-161,-159,-160,-155,-154,-144,-160,-162,-1566,-1463]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. c3 Ngf6 5. Qe2 a6 6. Ba4 {[%cal Bb5a4,Ba4c2,Bc2d3][%mdl 32]} b5 7. Bc2 Bb7 8. O-O e6 9. d4 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7} Be7 10. Re1 (10. Nbd2 Qc7 11. Bd3 Nh5 12. g3 Nhf6 13. b3 O-O 14. Bb2 c4 15. Bc2 cxb3 16. axb3 {½-½ (95) Ponomariov,R (2712)-Vidit,S (2692) Khanty-Mansiysk 2017}) 10... Qc7 11. Bd3 O-O 12. Nbd2 {LiveBook: 5 Games} Nh5 $146 ({Predecessor:} 12... Rfe8 13. Nf1 cxd4 14. cxd4 e5 15. d5 Nc5 16. Ng3 Nxd3 17. Qxd3 {1-0 (42) Ramirez,A (2549)-Chandra,A (2505) Saint Louis 2017}) 13. Nf1 e5 14. dxe5 {g4 is the strong threat.} c4 15. Bc2 {And now g4 would win.} dxe5 16. Nh4 Nf4 17. Bxf4 exf4 18. Nf5 Ne5 19. Nd2 Rad8 20. Nf3 Nxf3+ 21. Qxf3 Rd2 22. Re2 Rfd8 23. Nd4 Rxe2 24. Qxe2 Bf6 25. Rd1 {[#]} b4 $1 {[%mdl 512]} 26. Bb1 (26. cxb4 Bxd4) 26... g6 27. Rd2 (27. Bc2 $142) 27... Qb6 $17 {aiming for ...bxc3.} 28. Qd1 bxc3 29. bxc3 Qa5 ({Black should try} 29... Ba8 30. a4 Qa5) 30. Ne2 (30. Qc1 $17 {might work better.}) 30... Re8 31. Nxf4 Bxc3 32. Re2 Rd8 33. Nd5 Bxd5 $40 {[%mdl 128] Black goes for the king.} 34. exd5 Rxd5 35. Qc1 {[#]} Qa3 $1 {[%mdl 512]} 36. Rc2 $2 (36. Qf1) (36. Qxa3 Rd1+) 36... Qd6 {Precision: White = 34%, Black = 74%.} 0-1

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.14"]
[Round "6"]
[White "Li, Ruifeng"]
[Black "Liu, Bovey"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2568"]
[BlackElo "2228"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,64,24,14,-2,20,0,0,-11,-5,-16,-9,-17,54,51,105,56,91,93,80,32,149,103,238,241,213,232,176,200,279,278,234,239,222,235,248,244,410,393,435,427,467,443,29995,0,29996,29997,29997,29998,29998,29999,29999]} 1. e4 c5 2. Nc3 e6 3. g3 a6 4. Bg2 b5 5. d3 Bb7 6. Nh3 d6 {B23: Closed Sicilian: Lines without g3} (6... b4 7. Ne2 d5 8. e5 Nc6 9. f4 Nh6 10. Nf2 Nf5 11. O-O Qb6 12. c3 Be7 13. g4 Nh4 14. Bh1 {0-1 (35) Yu,Y (2738)-Khismatullin,D (2639) Moscow 2017}) 7. O-O Nc6 8. f4 Nf6 {LiveBook: 9 Games. White has an edge.} 9. Be3 Qc7 10. f5 b4 $146 ({Predecessor:} 10... e5 11. g4 h6 12. a4 b4 13. Nb1 {1-0 (34) Faust,H-Polanyi,P Bad Ragaz 1994}) 11. fxe6 bxc3 12. exf7+ Qxf7 13. bxc3 Ne5 ({Better is} 13... Nd8 $11) 14. Rb1 $1 $14 {[%mdl 1024] White has compensation.} h6 (14... Bc6 $14) 15. Qe2 O-O-O 16. d4 Qc4 17. Qf2 Neg4 ({Black should try} 17... Nfg4 $14 18. Qf5+ Rd7 19. Rxb7 Kxb7 20. dxe5 Nxe5) 18. Qf5+ $16 Rd7 {[#]} (18... Kc7 $16 {keeps fighting.} 19. Rxb7+ Kxb7 20. e5+ Kb6) 19. Rxb7 $1 $18 Kxb7 20. e5+ Kc7 21. Bf4 Qxc3 22. exf6 Qxd4+ 23. Kh1 Nxf6 24. Rb1 g6 {[#]} 25. Qe6 $1 $40 {[%mdl 128] White has strong attack.} ({And not} 25. Qxg6 Rg8 $11) 25... Bg7 $2 (25... Rhh7) 26. c3 $1 {[%cal Rc3d4]} Qd3 27. Rb7+ Kd8 28. Nf2 Qf5 (28... Re8 $18) 29. Rb8+ Kc7 {[#]} 30. Bxd6+ $1 {[%mdl 512] White mates.} Rxd6 31. Rb7+ Kd8 32. Qxd6+ Ke8 33. Qe7# {Precision: White = 81%, Black = 19%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.14"]
[Round "6"]
[White "Chandra, Akshat"]
[Black "Brown, Michael William"]
[Result "1-0"]
[ECO "C72"]
[WhiteElo "2484"]
[BlackElo "2508"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,65,45,46,22,29,30,58,55,53,51,150,150,181,178,178,144,208,135,172,131,125,131,177,130,225,216,225,222,344,319,380,379,428,395,421,410,420,420,29952,6473,29974,29970]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O Bd7 6. d4 Nxd4 7. Bxd7+ Qxd7 8. Nxd4 exd4 9. Qxd4 Ne7 {C72: Ruy Lopez: Deferred Steinitz: 5 0-0} (9... Nf6 10. c4 Be7 11. Nc3 O-O 12. b3 c6 13. Bb2 Rad8 14. Rad1 Qc7 15. Kh1 b5 16. Ne2 Rfe8 17. Ng3 d5 18. cxd5 cxd5 19. e5 Bc5 {1-0 (47) Areshchenko,A (2677)-Demchenko,A (2629) Minsk 2017}) 10. Nc3 Nc6 11. Qd3 Be7 12. Nd5 O-O 13. Bd2 {[%cal Bc1d2,Bd2c3,Bc3e5][%mdl 32]} Rae8 {[#] LiveBook: 4 Games} 14. Qg3 $146 {[#] aiming for Bh6.} ({Predecessor:} 14. Bc3 Bd8 15. Rfe1 Ne5 16. Qg3 Ng6 17. Rad1 {0-1 (35) Friedel,J (2516)-Hess,R (2485) Saint Louis 2009}) 14... Bd8 15. Rae1 f5 16. Qb3 Kh8 $1 17. Qxb7 {Strongly threatening Nb6.} Rxe4 (17... fxe4 $14 18. c4 (18. Qxa6 Ne5 $14) 18... Ne5) 18. Bc3 Rfe8 19. Rxe4 fxe4 20. Qxa6 Ne5 (20... Ne7 $16) 21. Re1 Qf7 22. Bxe5 Qxd5 23. Bc3 Bg5 24. Qa4 Qe6 (24... c6 $16 {keeps fighting.} 25. Qa7 Rg8) 25. Qc6 $18 Re7 26. a4 h6 (26... d5 {is a better defense.} 27. Qxe6 Rxe6) 27. a5 e3 28. fxe3 Rf7 {( -> ...Qxe3+!)} 29. Kh1 Bh4 30. Rg1 Bf2 31. a6 Qxe3 {[#]} (31... Bxe3 $18 32. a7 Bxa7 33. Qa8+ Kh7 34. Qxa7 Qg6) 32. a7 $1 {[%mdl 512]} Rf8 (32... Qxa7 33. Qe8+) 33. a8=Q {Precision: White = 77%, Black = 31%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.14"]
[Round "6"]
[White "Tang, Andrew"]
[Black "Colas, Joshua"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2478"]
[BlackElo "2366"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,76,50,43,39,43,33,37,53,22,35,27,51,44,56,58,95,81,93,96,92,64,84,64,64,69,75,59,130,123,120,120,127,128,122,125,145,133,193,198,215,201,281,271,359,353,400,376,475,450,537,525,477,400,587,579,547,488,5385,5261,29990,29982,29984,29978,610]} 1. d4 f5 2. Nf3 Nf6 3. c4 e6 4. Nc3 d5 5. Bf4 c6 6. e3 Bd6 7. Ne5 O-O {A84: Dutch Defence: 2 c4 Miscellaneous} 8. Bd3 {LiveBook: 3 Games} Qe7 (8... Ne4 9. f3 g5 10. fxe4 gxf4 11. exf4 dxe4 12. Be2 Nd7 13. Qb3 c5 14. Nb5 Qa5+ 15. Kd1 {0-1 (37) Mareco,S (2598)-Sequera Paolini,J (2413) Rochefort 2015}) 9. c5 Bc7 {White is slightly better.} 10. O-O Ne8 $146 ({Predecessor:} 10... b6 11. b4 Ne4 12. Nxe4 fxe4 13. Be2 a5 14. cxb6 Bxb6 15. bxa5 Bxa5 {1-0 (25) Repka,C (2414)-Kociscak,J (2474) Zillertal 2015}) 11. h3 Nd7 12. b4 Nxe5 13. Bxe5 Bxe5 14. dxe5 b6 15. Rc1 $36 {[%mdl 2048] White is really pushing.} bxc5 16. bxc5 Qxc5 17. Ne2 Qb6 18. Qc2 Bd7 $1 19. Nd4 Rc8 20. Nb3 c5 (20... Rb8 $14) 21. Nxc5 $16 Bb5 22. Bxb5 Qxb5 23. Qc3 Rf7 24. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Qb6 {Hoping for ...Rfc7.} 25. a5 Qb5 {[#]} (25... Qb8 $16 {might work better.}) 26. Qa3 $1 $18 Rc6 {[#]} 27. Nb3 $1 {[%cal Rb3d4]} Rxc1 28. Rxc1 Qb8 29. Nd4 g6 30. f4 Ng7 31. Qd6 Qe8 32. Qa6 {And now Rc8 would win.} Qe7 33. Nb5 h5 (33... Nh5 $142 34. Rc8+ Rf8) 34. Rc8+ Rf8 {If Black can now play ...Rxc8 this consolidates a bit.} 35. Qxa7 Qb4 (35... Qxa7 $142 36. Nxa7 Rxc8 37. Nxc8 Ne8) 36. Rxf8+ Kxf8 37. Qa8+ Ne8 38. Nd6 Qe1+ {Precision: White = 89%, Black = 51%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.14"]
[Round "6"]
[White "Troff, Kayden W"]
[Black "Liang, Awonder"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "2472"]
[BlackElo "2536"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,60,20,31,18,12,24,25,14,13,4,15,6,6,6,6,6,16,7,0,17,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 c5 6. dxc5 Na6 7. g3 Nxc5 8. Bg2 b6 9. O-O {E39: Nimzo-Indian: Classical: 4...c5 5 dxc5 0-0} Bb7 10. Nb5 {[#] aiming for a3.} Be4 11. Qd1 {Black must now prevent a3.White has an edge.} Nb7 {The position is equal.} 12. Bf4 a6 13. Nd6 Bxd6 14. Bxd6 Nxd6 15. Qxd6 Rc8 (15... Qb8 16. Rfd1 Qb7 {½-½ (71) Akobian,V (2661)-Bruzon Batista,L (2652) Saint Louis 2017}) 16. Ne5 Bxg2 17. Kxg2 b5 $146 18. cxb5 ({Of course not} 18. Qxa6 Qc7 $17) (18. Rfc1 {keeps more tension.} bxc4 19. Rxc4 Rxc4 20. Nxc4 Qa8+ 21. f3) 18... axb5 19. Rfd1 {[%cal Re5d7]} Rc2 20. Nxd7 Qxd7 (20... Nxd7 {feels hotter.} 21. Qxd7 Qa8+ 22. Kg1 Rxb2 23. Qd3 g6) 21. Qxd7 Nxd7 22. Rxd7 Rxb2 $11 {[%mdl 4096] Endgame KRR-KRR} 23. e3 b4 24. a4 bxa3 25. Rxa3 Rbb8 26. Raa7 Rbd8 27. Rdc7 Rc8 28. Rcb7 Rb8 29. Rd7 Rbd8 30. Rdc7 Rc8 {Precision: White = 80%, Black = 96%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.14"]
[Round "6"]
[White "Brattain, Mika A"]
[Black "Checa, Nicolas D"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2364"]
[BlackElo "2415"]
[Annotator "TA"]
[PlyCount "131"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,131,16,15,20,16,19,10,47,47,49,40,62,61,66,27,56,66,65,0,14,0,73,75,70,76,63,22,55,0,0,-68,-59,-444,-442,-546,-543,-540,-197,-204,-203,-212,-205,-455,-439,-448,-391,-650,-93,-112,-61,-74,0,-142,-118,-100,0,0,52,64,64,60,82,47,49,48,46,33,27,0,0,0,3,0,0,0,0,0,12,0,0,0,0,0,0,0,-8,-37,-37,-104,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-294,-294,-294,-8,-8,-8,-8,-8,-8,-8,-8]} 1. Nf3 d5 2. g3 Bg4 3. Bg2 Nd7 4. O-O Ngf6 5. h3 Bh5 6. d4 {A07: Réti Opening: New York and Capablanca Systems} e6 7. c4 c6 8. cxd5 exd5 9. Qb3 Qb6 10. Qe3+ {LiveBook: 9 Games} Be7 11. Nh4 {aiming for Nf5.} Bg6 12. Nc3 Kf8 13. Nxg6+ hxg6 {[#]} 14. Qd3 $146 Re8 15. Rb1 a5 16. Bf4 Nh5 17. Bd2 Nhf6 18. Bf4 (18. h4 $14) 18... Nh5 $11 19. Bd2 (19. Be3 $11) 19... Nhf6 $16 20. Rfe1 Bd6 21. e3 Kg8 22. Qc2 Nf8 23. Na4 (23. e4 $14 Nxe4 24. Nxe4 dxe4 25. Rxe4 Rxe4 26. Qxe4) 23... Qc7 $11 24. Rec1 (24. Nc3 $11) 24... Ne6 25. b4 $2 {[%mdl 8192]} ({White should try} 25. Be1 $15) 25... Ng5 $1 $19 26. b5 {[%cal Rb5c6] [#]} Bxg3 $1 {[%mdl 512]} 27. Be1 {[%cal Rb5c6]} (27. fxg3 Qxg3) 27... Bxf2+ $2 (27... Nxh3+ 28. Bxh3 Rxh3 29. fxg3 Rxe3) 28. Qxf2 Nxh3+ 29. Bxh3 Rxh3 30. Qf4 $2 (30. Qg2 {was necessary.} Rhxe3 31. Bf2) 30... Qc8 31. bxc6 bxc6 32. Nc5 $2 (32. Rc2 Nh5 33. Nb6) 32... Rh5 $2 (32... Nh5 $19 {and Black stays clearly on top.} 33. Qf2 Rexe3) 33. Rb2 $17 (33. Qg3 $2 Qf5 $19) 33... Rf5 (33... Qh3 $6 34. Rh2 $11) (33... g5 $1 $17 {[%cal Rg5f4]} 34. Qg3 Ng4) 34. Qh4 $15 Rh5 (34... Rxe3 $142 35. Rcb1 Re8) 35. Qf4 $1 $17 {[#]} g5 $1 {[%cal Rg5f4]} ({Reject} 35... Qh3 $6 36. Rh2 $11) 36. Qg3 {[#]} Rh4 (36... Qf5 $1 $17) 37. Rg2 $11 Rg4 ({Better is} 37... Ng4 $11) 38. Qf3 $14 Rxg2+ 39. Kxg2 Qb8 40. Rc2 Qb1 41. Re2 g4 42. Qf1 Ne4 43. Bh4 (43. Qf5 {keeps more tension.} Qb5 44. Rc2 Nd6 45. Qf4 Qb1 46. Re2) 43... Qxf1+ 44. Kxf1 Nxc5 45. dxc5 $11 {[%mdl 4096] Endgame KRB-KR} Re4 46. Kf2 f6 47. Bg3 Rb4 48. Bd6 (48. a3 $5 {[%cal Ra3b4]} Rb3 49. a4 $11) 48... Kf7 49. Kg3 g5 50. Rh2 Kg7 51. Rd2 a4 52. Kf2 (52. a3 $5 {[%cal Ra3b4]} Rb3 53. Kxg4 $17) 52... Kg6 {[%mdl 1024] Black has compensation.} 53. Kg3 (53. a3 $1 $15 Rb3 54. Rd4) 53... f5 (53... Re4 $17 54. Rd3 f5) 54. Be5 $1 Rb1 55. Rb2 Rf1 56. Bd4 Rf3+ 57. Kg2 f4 58. Rb6 Kf5 {White must now prevent ...Rh3.} 59. Rxc6 {Rf6+ is the strong threat.} ({Don't blunder} 59. exf4 $2 gxf4 60. Bg1 Ra3 $19) 59... fxe3 60. Rd6 Ke4 61. Bc3 $2 {[%mdl 8192]} (61. Bxe3 $1 $11 Kxe3 62. Rxd5) 61... Rf2+ $19 62. Kg3 Rc2 $2 (62... Rxa2 $19 {Threatens to win with ...Rc2.} 63. Re6+ Kd3) 63. Re6+ $11 {The position is equal.} Kd3 64. Ba5 $1 {And now c6 would win.} Rxc5 (64... Rxa2 65. c6) 65. Bb6 Rc3 {Hoping for ...e2.} 66. Rxe3+ {Precision: White = 52%, Black = 49%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.15"]
[Round "7"]
[White "Liang, Awonder"]
[Black "Li, Ruifeng"]
[Result "1-0"]
[ECO "B51"]
[WhiteElo "2536"]
[BlackElo "2568"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,75,63,64,47,57,60,106,37,60,51,48,55,39,49,79,87,85,84,91,57,99,98,81,106,149,128,274,57,48,0,285,230,282,285,285,285,290,290,278,276,403,406,407,394,406,404,517,511,517,505,508,129,508,502,586,572,565,560,1206,1206]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 {[%cal Bb8d7,Bd7e5,Be5d3][%mdl 32]} 4. O-O a6 5. Bd3 Ngf6 (5... b5 6. Re1 Bb7 7. a4 b4 8. Bc4 Ngf6 9. d3 e6 10. Nbd2 Be7 11. Nf1 O-O 12. Ng3 d5 {1-0 (50) Vachier Lagrave,M (2783)-Nepomniachtchi,I (2766) Leuven 2017}) 6. Re1 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7} b5 7. c4 g5 8. Nxg5 Ne5 9. Bf1 bxc4 {LiveBook: 4 Games} 10. Na3 $146 ({Predecessor:} 10. d4 cxd3 11. f4 Nc6 12. Bxd3 h6 13. Nf3 e6 14. Nc3 Bb7 15. b3 Be7 {½-½ (15) Barski,R (2336)-Borovikov,V (2564) Heusenstamm 2015}) 10... Rg8 11. d4 cxd4 12. f4 (12. Qxd4 $6 h6 $11) ({Better is} 12. Nxc4 $16 h6 13. Nxe5 dxe5 14. Nf3) 12... Bg4 $1 $14 {[%cal Rg4d1]} 13. Qxd4 Nd3 $1 {[%cal Rd3e1]} 14. Bxd3 cxd3 15. Qxd3 e6 16. f5 h6 17. Nf3 d5 {...Bc5+ is the strong threat.} 18. fxe6 $1 dxe4 19. exf7+ Kxf7 20. Ne5+ Ke6 21. Qc3 Nd5 (21... Rc8 $16 22. Nec4 (22. Nac4 Qd5 $16) 22... Qc7) 22. Qd4 $2 ({White should try} 22. Qc4 $18 Kxe5 23. Rxe4+ (23. Qxe4+ Kd6 $16) 23... Kf6 24. Rxg4 Qb6+ 25. Kh1 Rxg4 26. Qxg4 (26. Qxd5 Qe6 $16)) 22... Nf6 $1 23. Qc3 $2 (23. Qxd8 $14 Rxd8 24. Nxg4 Nxg4 25. g3 (25. Rxe4+ Kd5 $17)) 23... Nd5 $1 $18 {[%cal Rd5c3]} 24. Qc4 Bh3 25. Qxe4 ({And not} 25. Qc6+ Qd6 $11) 25... Bc5+ {[#]} 26. Kh1 $1 Bxg2+ 27. Qxg2 Rxg2 28. Nc6+ Kf5 (28... Kf6 {was worth a try.} 29. Nxd8 Rf2) 29. Nxd8 Rf2 30. Nf7 Kg4 {Threatens to win with ...Kh3.} 31. Rg1+ Kh3 {[%csl Gh3][%cal Rf2h2] [#]} 32. Ng5+ $1 hxg5 {[%csl Gh3][%cal Rf2h2]} 33. Rg3+ Kh4 {Hoping for ...g4.} 34. Bxg5+ Kh5 {[#]} 35. Rag1 $1 {Black must now prevent Rh3+.White is clearly winning.} Rf3 36. Rxf3 {Be3! would kill now.} Bxg1 37. Rf5 ({Less strong is} 37. Kxg1 Kxg5 38. Nc4 Rc8 $18) 37... Rg8 38. Rxd5 {Precision: White = 73%, Black = 51%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.15"]
[Round "7"]
[White "Brown, Michael William"]
[Black "Tang, Andrew"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2508"]
[BlackElo "2478"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,77,19,15,8,6,9,0,0,0,0,10,0,0,0,9,0,0,0,0,-26,-20,-33,25,14,27,43,51,0,49,50,54,48,78,83,74,17,119,99,158,144,164,168,211,217,385,393,389,383,388,385,382,370,393,410,400,400,600,549,564,545,516,490,579,529,1133,966]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 dxc4 5. Bg2 Nc6 6. Qa4 Bb4+ 7. Bd2 Nd5 8. Qb5 {E04: Open Catalan: 5 Nf3} Bxd2+ 9. Nbxd2 c3 10. bxc3 {The position is equal.} Nxc3 11. Qd3 (11. Qb2 Na4 12. Qc2 Nb6 13. e3 O-O 14. O-O Qe7 15. Rac1 Rd8 {0-1 (57) Harikrishna,P (2755)-Bu,X (2723) Danzhou 2016}) 11... Nd5 12. O-O O-O 13. Rfc1 {[#]} Na5 $146 ({Predecessor:} 13... Rb8 14. Rab1 Bd7 15. Ne4 Nce7 {0-1 (39) Svane,R (2573)-Bluebaum,M (2632) Minsk 2017}) 14. e4 Nf6 15. Ne5 b6 16. Qe3 Nd7 17. Nd3 e5 (17... Bb7 $15) 18. dxe5 $11 c5 19. f4 Qe7 20. Nf3 (20. Nf2 $14) 20... Ba6 21. Nf2 Rad8 22. Nh4 g6 23. Rd1 Nc6 24. Qa3 (24. Nf3 $16) 24... Nb4 (24... Ndb8 $1 $11) 25. Ng4 $16 Be2 (25... Kh8 $142) 26. Nh6+ Kh8 27. Rd2 Bb5 28. Qb2 ({And not} 28. Qxa7 c4 $15) 28... c4 $2 {[#]} (28... f6 {was called for.} 29. N4f5 gxf5) 29. Rd6 $18 ({Not} 29. e6+ f6 $18) 29... Nc5 {and if ...Ncd3 works, Black does fine.} 30. Qxb4 Rxd6 31. exd6 ({Weaker is} 31. Qxb5 Qd7 $16) 31... Qxd6 {[#] Strongly threatening ...Qd4+.} 32. Nf3 Ba6 33. Qb2+ f6 34. e5 Qd8 (34... Qd3 $142 35. exf6 c3) 35. Ng4 {[%cal Bh6g4,Bg4f6,Bf6d5][%mdl 32] White is clearly winning.} Nd3 36. Qc3 b5 37. Nxf6 b4 38. Qd4 c3 39. Nd5 {Precision: White = 68%, Black = 40%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.15"]
[Round "7"]
[White "Checa, Nicolas D"]
[Black "Troff, Kayden W"]
[Result "1/2-1/2"]
[ECO "A16"]
[WhiteElo "2415"]
[BlackElo "2472"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,60,0,0,0,17,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 {[%cal Bg8f6,Bf6d5,Bd5b4][%mdl 32]} 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Qc2 (5. e4 Nxc3 6. dxc3 Qxd1+ 7. Kxd1 Nd7 8. Bf4 c6 9. Kc2 Nc5 10. Nd2 Bg7 11. Be3 Na4 12. Bc4 Nb6 13. Bb3 Nd7 14. a4 O-O 15. h4 h5 16. a5 Ne5 17. f3 {½-½ (48) So,W (2812)-Mamedyarov,S (2800) Paris 2017}) 5... Nc6 6. d4 {A16: English Opening: 1...Nf6 with ...d5} Ndb4 7. Qa4 Bd7 8. Qd1 e5 9. dxe5 Bf5 10. Bg5 Be7 {LiveBook: 11 Games. The position is equal.} 11. e4 {[#] Threatens to win with Bxe7.} Bg4 $1 12. Bxe7 Qxe7 13. a3 $146 Bxf3 14. gxf3 Rd8 15. Qa4 $1 Nd3+ $1 16. Bxd3 $1 Rxd3 17. Qb5 Rd4 18. Nd5 (18. f4 {looks sharper.} O-O 19. h4 Qe6 20. Qe2 Rfd8 21. h5) 18... Qxe5 19. Qxb7 Rxe4+ $1 20. fxe4 Qxe4+ 21. Ne3 Qxh1+ 22. Kd2 Qxa1 23. Qxc6+ $11 {[%mdl 4096] Endgame KQR-KQN} Kf8 24. Qf6 Rg8 {...Qg1 is the strong threat.} 25. Qd8+ (25. Nf5 $5 gxf5 26. Qd8+ Kg7 27. Qg5+ Kf8 28. Qd8+ Kg7 29. Qg5+ Kf8 30. Qd8+ $11) 25... Kg7 {[#]} 26. Nf5+ $1 {[%mdl 512]} gxf5 27. Qg5+ Kf8 28. Qd8+ Kg7 29. Qg5+ Kf8 30. Qd8+ Kg7 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.15"]
[Round "7"]
[White "Colas, Joshua"]
[Black "Brattain, Mika A"]
[Result "1/2-1/2"]
[ECO "E62"]
[WhiteElo "2366"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,117,23,32,18,33,25,47,27,17,14,8,0,30,0,0,0,-8,0,0,-8,-1,-39,0,-14,-17,-44,-43,-63,-42,-93,-51,-52,-53,-53,-56,-54,-30,-33,0,-23,9,0,25,0,44,34,36,47,44,46,83,74,77,82,72,83,81,52,42,29,20,0,0,0,0,0,8,3,8,3,5,5,8,8,8,0,0,0,0,0,0,0,0,0,0,0,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8]} 1. Nf3 Nf6 2. c4 d6 3. g3 g6 4. Bg2 Bg7 5. O-O O-O 6. d4 Nc6 7. Nc3 e5 8. dxe5 dxe5 9. Bg5 Be6 10. Qc1 {E62: King's Indian: Fianchetto: 6...c6 and Panno Variation (6...Nc6) without ...a6} (10. Qa4 h6 11. Rad1 Qe7 12. Nd5 Bxd5 13. Bxf6 Bxf6 14. cxd5 Nd4 15. e4 Nxf3+ 16. Bxf3 Rfd8 17. Rc1 Qd7 18. Qxd7 Rxd7 {½-½ (35) Edouard,R (2628)-Bacrot,E (2692) Cap d'Agde 2016}) 10... Qc8 11. Rd1 Nd7 12. Nd5 {White is slightly better.} f6 13. Be3 Re8 $146 ({Predecessor:} 13... Rf7 14. b4 Ne7 15. Nxe7+ Rxe7 16. c5 Nf8 17. a4 g5 {1-0 (65) Vadasz,L (2495)-Goodman,D (2340) Dortmund 1977}) 14. h4 Ne7 15. Nxe7+ Rxe7 16. Nd2 f5 17. Nf3 e4 $36 {[%mdl 2048] Black fights for an advantage.} 18. Ng5 Ne5 19. c5 Kh8 20. Bd4 Bg8 21. Qc3 Qf8 22. Qb4 c6 (22... b6 $5) 23. Bc3 ({Better is} 23. Nh3 $15) 23... Rd8 24. Qa5 Red7 25. Rxd7 Rxd7 26. Qxa7 Ng4 27. Qa3 Rd5 {[%mdl 1024] Black has compensation.} (27... h6 $5 {[%cal Rh6g5]} 28. Nh3 Bxc3 29. Qxc3+ Qf6 $11) 28. Rc1 Ne5 29. b4 Qd8 (29... Rd8 $5 {[%cal Rd8a8]}) 30. Qa4 h6 (30... Ng4 $5 {[%cal Rg7c3]} 31. Qc2 Bxc3 32. Qxc3+ Qf6 $11) 31. Nh3 {Nf4 is the strong threat.} g5 32. hxg5 hxg5 33. Qc2 Bh7 34. Re1 Bg6 35. Qc1 Nf7 36. f3 exf3 37. exf3 Rd3 $1 38. Bxg7+ Kxg7 39. Nf2 {The position is equal.} Qd4 40. Qa1 Qxa1 41. Rxa1 Rd4 42. a3 Kf6 43. Rd1 Rxd1+ 44. Nxd1 $11 {[%mdl 4096] Endgame next f4 is good for White. KBN-KBN} Ke5 45. Kf2 f4 46. gxf4+ gxf4 47. Nc3 Bd3 48. Bh3 Kd4 49. Ne2+ Bxe2 50. Kxe2 {Black must now prevent Bc8. KB-KN} Kc3 51. Be6 Ne5 52. Bc8 Nc4 53. Bxb7 Nxa3 54. Bxc6 {[#] Hoping for b5.} Kxb4 55. Kd3 Kxc5 56. Ba8 Nc4 57. Ke4 Nd2+ 58. Kxf4 Nxf3 59. Kxf3 {Precision: White = 53%, Black = 57%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.15"]
[Round "7"]
[White "Liu, Bovey"]
[Black "Chandra, Akshat"]
[Result "1/2-1/2"]
[ECO "C50"]
[WhiteElo "2228"]
[BlackElo "2484"]
[Annotator "TA"]
[PlyCount "177"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,177,16,0,0,-10,-12,-31,0,0,4,-17,16,10,12,12,18,18,23,-10,-10,-17,-21,-41,-32,-74,-74,-74,-74,-79,-79,-70,-65,-57,-58,-78,-85,-71,-71,-76,-80,-84,-85,-84,-86,-95,-100,-105,-87,-84,-104,-99,-86,-89,-11,-13,-16,-144,0,-77,0,-90,-90,-82,-75,-79,-65,-76,-65,-66,-65,-88,-80,-73,-52,-62,-52,-64,-52,-60,-60,-63,-56,-77,-80,-75,-87,-84,-85,-140,-50,-62,-55,-62,-7,-55,-55,-55,-56,-74,0,-2,0,-64,-66,-73,-65,-86,-72,-66,0,-4,0,0,-16,-10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,36,0,18,21,25,32,28,39,27,18,146,125,130,88,89,8,8,8,8,8,8,8,8,0,8,0,8,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 d6 6. O-O O-O 7. a4 a5 8. h3 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} h6 9. Na3 {[%cal Bb1a3,Ba3c2,Bc2e3][%mdl 32] LiveBook: 3 Games} (9. Re1 Ba7 10. Nbd2 Ne7 11. Nf1 Ng6 12. Ng3 c6 13. d4 exd4 14. Nxd4 {½-½ (48) Karjakin,S (2783)-Kramnik,V (2811) Shamkir 2017}) 9... Ne7 10. Nc2 Ng6 11. Be3 $146 ({Predecessor:} 11. d4 Ba7 12. Re1 Re8 13. dxe5 dxe5 14. Be3 Qxd1 15. Raxd1 Bxe3 16. Nxe3 {½-½ (46) Muniz,R (2241)-Carbone,D (2127) Montevideo 2016}) 11... Re8 12. Re1 Be6 13. Bxc5 dxc5 14. Ne3 Qd7 15. Qb3 b6 16. Rad1 Rad8 17. d4 exd4 18. e5 Nd5 19. cxd4 Nxe3 20. Rxe3 {White wants to play d5.} Bxc4 21. Qxc4 Qd5 22. Qc2 Nf4 $1 23. Rd2 Ne6 $1 {[%cal Rc5d4]} 24. dxc5 Qxc5 25. Rc3 Rxd2 26. Qxd2 Qb4 27. Qc2 Rd8 28. Rc4 Qe7 29. b3 Qd7 30. Kh2 Qd3 31. Qb2 Rd5 32. Rc3 Qf5 33. Qc1 Nc5 34. Qe3 Qb1 (34... Qd7 $17) 35. Nd4 $1 $11 Qe4 36. Nf3 (36. Nb5 $11) 36... Qb1 (36... Qxe3 $17 37. Rxe3 Rd1) 37. Nd2 (37. Nd4 $1 $11 {keeps the balance.}) 37... Qf5 (37... Qb2 {looks sharper.} 38. Nc4 Qa1 39. Nd2 Ne6 40. g3 Nc5) 38. Nf3 $1 Qe6 39. Qe2 Rd7 40. Qc2 Qd5 41. Re3 Qd1 42. Qf5 Ne6 43. h4 Qf1 44. Kg3 Rd8 (44... g6 $5 {[%cal Rg6f5]} 45. Qe4 Rd1 $15) 45. h5 Qd1 46. Kh2 Qd7 47. Nh4 Qe7 48. Nf3 Nc5 49. Qg4 Qe6 50. Qh4 Rd1 51. Nd4 Qd7 $1 52. Ne2 (52. Nf3 $142) 52... Re1 (52... Rd2 $17 {...Nxb3! is the strong threat.} 53. Qf4 Nxb3 $1 {[%mdl 512]}) 53. Qg3 Qd1 {[%csl Gd1][%cal Re1h1]} 54. Qf3 Rh1+ 55. Kg3 Qd8 {[%csl Gh1][%cal Rd8h4]} 56. Qg4 $1 Ne6 57. Rf3 $1 Ng5 ({Black should try} 57... Rd1 $17) 58. Re3 $1 Ne6 (58... Re1 $11) 59. Rf3 $1 $15 Re1 60. Qf5 Qe7 ({Of course not} 60... Rxe2 61. Qxf7+ Kh8 62. Qxe6 $11) 61. Re3 $1 Rh1 62. Qg4 Re1 (62... Kh7 $15) 63. Nf4 Rxe3+ 64. fxe3 Nf8 65. Qf5 Qc5 66. Qe4 Qc3 67. e6 {And now e7 would win.} fxe6 68. Nxe6 Qxb3 69. Nxc7 Qf7 70. Qd5 Nd7 71. Qa8+ Nf8 72. Qd5 Nd7 73. Qa8+ Kh7 {White must now prevent ...Nf6.} 74. Qe4+ Kh8 75. Qa8+ Qg8 76. Qxg8+ Kxg8 $14 {[%mdl 4096] Endgame KN-KN} 77. Nd5 Kf7 78. Kf4 Ke6 79. e4 b5 80. Nc7+ Ke7 (80... Kf6 $1 $11 {remains equal.}) 81. Nxb5 $16 Nc5 82. Nc3 Ke6 {[#]} 83. g4 (83. g3 $1 $16) 83... Kf6 $11 {The position is equal.} 84. Nd5+ Ke6 85. Nb6 Nd3+ 86. Ke3 Ne5 87. Kf4 Nd3+ 88. Ke3 Ne5 89. Kf4 {Precision: White = 65%, Black = 56%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.16"]
[Round "8"]
[White "Li, Ruifeng"]
[Black "Checa, Nicolas D"]
[Result "1-0"]
[ECO "A01"]
[WhiteElo "2568"]
[BlackElo "2415"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,77,13,-7,17,19,44,46,35,33,37,31,72,77,123,122,111,111,109,75,79,62,62,55,66,62,85,80,81,72,75,72,75,77,83,54,163,162,174,136,206,210,333,329,278,243,996,995,847,946,931,1583,1448,1389,1147,915,29966,29969,29967,29969,29965,29947,6470,6429,6427,6387,5389,5321]} 1. b3 e5 2. Bb2 Nc6 3. e3 Nf6 4. Bb5 Bd6 5. Na3 Na5 (5... a6 6. Be2 Be7 7. Nc4 e4 8. d4 d5 9. Ne5 O-O 10. Nxc6 bxc6 11. c4 a5 12. Qc2 Bb4+ 13. Bc3 {1-0 (34) Vachier Lagrave,M (2796)-Anand,V (2786) Stavanger 2017}) 6. Be2 {A01: Nimzowitsch-Larsen Opening} a6 7. c4 {LiveBook: 62 Games} b6 $146 ({Predecessor:} 7... O-O 8. Nc2 Re8 9. d3 b5 10. Nf3 bxc4 11. dxc4 e4 12. Nfd4 Be5 13. c5 {1-0 (64) Granda Zuniga,J (2688)-Perez Candelario,M (2562) La Roda 2016}) 8. Nf3 {The position is equal.} Qe7 9. Nc2 Bb7 10. O-O O-O 11. d4 {[%cal Rd4e5]} exd4 12. exd4 Rfe8 13. Bd3 Be4 14. Re1 {aiming for Ng5.} Qd8 15. d5 {Black must now prevent Bxf6.} Bg6 16. Ne5 Bxe5 17. Rxe5 Rxe5 18. Bxe5 d6 19. Bc3 Nb7 20. Bxg6 hxg6 21. Qf3 Nc5 22. Re1 Ncd7 23. g4 {[%cal Bg2g4,Bg4g5][%mdl 32]} Nh7 {[#]} (23... Qf8 $14) 24. Nb4 $1 $18 {[%cal Bc2b4,Bb4c6,Bc6e7][%mdl 32]} Qf8 {[#]} 25. Qe2 $1 Nhf6 (25... Nb8 $16 26. h4 Nf6) 26. Nc6 Kh8 (26... Ne5 $142 27. Bxe5 (27. Nxe5 dxe5 28. Qxe5 Qc5 $18) 27... dxe5 28. Qxe5 Qd6) 27. g5 Nh5 28. f4 Qc8 $2 (28... Kh7 29. f5 b5) 29. Ne7 Qd8 30. f5 Kh7 31. fxg6+ fxg6 32. Qe6 Qe8 33. Bd4 Nf4 34. Re4 Nh5 35. Rh4 Ne5 36. Bxe5 dxe5 {[#]} 37. Rxh5+ $1 {[%mdl 512] White is clearly winning.} gxh5 38. g6+ Kh6 39. h4 {Precision: White = 74%, Black = 38%.} ({Weaker is} 39. Qxe5 h4 $18) 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.16"]
[Round "8"]
[White "Brown, Michael William"]
[Black "Liu, Bovey"]
[Result "1-0"]
[ECO "E01"]
[WhiteElo "2508"]
[BlackElo "2228"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,83,10,9,24,21,51,56,65,54,79,77,72,77,90,97,82,78,85,101,101,71,87,63,76,33,74,58,181,175,186,175,183,192,177,194,187,182,177,185,240,227,304,312,387,290,312,97,88,95,95,93,300,272,241,250,439,431,433,436,414,412,1110,1104,1085,1093,1081,1067,1038,1000]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Bb4+ 5. Nd2 O-O 6. Ngf3 b6 7. O-O Bb7 8. b3 {E16: Queen's Indian: 4 g3 Bb7 5 Bg2 Bb4+} (8. a3 Be7 9. cxd5 exd5 10. b4 a5 11. b5 c6 12. bxc6 Nxc6 13. e3 b5 14. Ne5 Bd6 15. Bb2 a4 16. Qb1 Rb8 17. Bc3 Ba8 18. Nxc6 Bxc6 {½-½ (69) Wei,Y (2728)-Yu,Y (2749) Beijing 2017}) 8... c5 9. Bb2 {LiveBook: 4 Games} cxd4 10. Nxd4 {White has an edge.} Nbd7 $146 ({Predecessor:} 10... Qe7 11. Nc2 Bc5 12. b4 Bd6 13. Bxf6 Qxf6 14. cxd5 exd5 15. Nc4 Na6 {1-0 (24) Bai,J (2560)-Bellahcene,B (2493) Basel 2017}) 11. cxd5 Nxd5 12. Rc1 Rc8 13. Nc4 a6 14. a3 Bc5 15. b4 Be7 {[#]} 16. Nf5 $1 {[%mdl 512]} Bf6 (16... exf5 17. Bxd5) 17. Bxf6 N7xf6 18. Nfd6 Rc7 19. e4 Ne7 20. Qe2 b5 21. Rfd1 $36 {[%mdl 2048] White has some pressure.} Bd5 ({Better is} 21... Qb8 $14) 22. exd5 $18 exd5 23. Nxb5 axb5 {[#]} 24. Na5 $1 Rxc1 25. Rxc1 Qd7 26. Bf1 Ne4 27. Qxb5 Qf5 (27... Qa7 {is a better defense.} 28. Qe2 h6) 28. Qe2 Ng6 29. Nc6 h5 30. h4 Ra8 31. Nd4 $2 (31. b5 $18) 31... Qf6 $16 32. Nb5 Ne5 33. Bg2 Nxf2 $2 (33... Ng4 $16) 34. Rf1 $18 {[%cal Bc1f1,Bf1f2,Bf2f5,Bf5c5][%mdl 32]} ({And not} 34. Qxf2 Qxf2+ 35. Kxf2 Nd3+ 36. Ke3 Nxc1 $14) ({Less strong is} 34. Bxd5 Nfd3 $16) 34... Neg4 35. Rxf2 Qb6 $2 (35... Nxf2 36. Qxf2 Qc6) 36. Bxd5 Rc8 37. Bxf7+ Kh8 {intending ...Rc1+.} 38. Kg2 {aiming for Rf3.} Ne3+ (38... Nxf2 $142 39. Qxh5+ (39. Qxf2 Qb7+ 40. Kh2 Rc1 $17) 39... Qh6 40. Kxf2 Rf8) 39. Kh3 {White is clearly winning.} Ng4 40. Rf5 g6 {[#]} 41. Rc5 $1 Rf8 (41... Rxc5 42. Qe8+) 42. Qe7 {Precision: White = 64%, Black = 26%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.16"]
[Round "8"]
[White "Chandra, Akshat"]
[Black "Liang, Awonder"]
[Result "1/2-1/2"]
[ECO "E12"]
[WhiteElo "2484"]
[BlackElo "2536"]
[Annotator "TA"]
[PlyCount "152"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,152,43,41,44,43,54,42,56,48,54,45,52,35,66,52,67,56,54,53,62,48,48,48,41,40,56,56,79,31,38,40,52,50,99,56,78,78,75,75,79,62,58,54,54,45,55,56,190,185,193,177,164,125,112,130,139,136,141,136,129,123,115,0,0,0,0,0,0,0,0,0,0,0,0,3,5,5,12,10,81,20,21,2,8,8,17,0,0,0,31,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,10,48,62,62,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. c4 e6 3. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} b6 4. a3 c5 5. d5 Ba6 6. Qb3 {E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7} g6 7. Nc3 {LiveBook: 4 Games} Bg7 8. e4 {White is slightly better.} O-O 9. Be2 $146 exd5 10. exd5 Re8 11. O-O d6 12. Re1 Bb7 13. Bf4 Na6 14. Nb5 (14. Nd2 $5 {[%cal Rc3b5]}) 14... Bf8 $1 15. Bd3 Rxe1+ 16. Rxe1 Nc7 17. Nc3 Qd7 18. h3 Rb8 19. Ng5 Nh5 20. Bh2 Re8 21. Rd1 Qd8 22. Nf3 f5 23. Qc2 Qf6 24. Qa4 Ra8 25. Re1 Qd8 26. h4 Bc8 27. Ng5 Bd7 28. Qd1 Qf6 29. Be2 h6 {[#]} (29... Ng7 $14) 30. Ne6 $1 $36 {[%mdl 2048] Keeping Black busy.} ({Less strong is} 30. Bxh5 hxg5 31. hxg5 Qxg5 $14) 30... Nxe6 31. dxe6 Bxe6 32. Nd5 ({Not} 32. Bxd6 Rd8 $15) 32... Qf7 33. Bxh5 gxh5 34. Rxe6 Qxe6 35. Nc7 Qe4 36. Nxa8 Qxa8 37. Qxh5 (37. Bxd6 $16 Bg7 38. Qxh5) 37... Qe4 $11 {[%cal Re4e1]} 38. Qg6+ Bg7 {[%cal Re4e1]} 39. Bxd6 Qe1+ 40. Kh2 Qxf2 41. Bg3 Qxb2 42. Qe6+ Kh8 43. Qc8+ Kh7 44. Qxf5+ Kh8 45. a4 Qd4 {[#]} (45... Qe2 $11 {remains equal.}) 46. Qe6 (46. Qf4 $1 $16) 46... Kh7 47. Kh3 Qg1 48. Qe4+ Kh8 49. Qa8+ Kh7 50. Qe4+ Kh8 51. Qa8+ Kh7 52. Qxa7 Qh1+ 53. Bh2 Qf1 54. Qd7 Qxc4 55. Be5 {[%csl Ge5][%cal Rd7g7]} Qg8 56. h5 Qb3+ $1 57. Kh2 {[%csl Ge5][%cal Rd7g7]} Qg8 58. Kh3 Qb3+ 59. g3 {[%csl Ge5][%cal Rd7g7]} (59. Kg4 $5 {[%cal Rd7g7]} Qg8 60. Kh3 $16) 59... Qg8 60. Qd3+ Kh8 61. Bxg7+ Qxg7 {[%mdl 4096] Endgame KQ-KQ} 62. Qd8+ Kh7 63. Qxb6 Qd7+ $1 64. Kg2 (64. g4 $14 Qd3+ 65. Kh4) 64... Qd5+ {The position is equal.} 65. Kf2 Qf5+ 66. Ke1 {Black must now prevent Qg6+!} Qe4+ 67. Kd2 {And now Qg6+! would win.} Qd4+ 68. Kc1 {Hoping for Qg6+.} Qc3+ 69. Kb1 {Strongly threatening Qg6+.} Qd3+ 70. Ka2 Qc2+ 71. Ka3 Qc3+ 72. Qb3 Qa1+ 73. Qa2 Qc3+ 74. Qb3 Qa1+ 75. Qa2 Qc3+ 76. Qb3 Qa1+ {Precision: White = 60%, Black = 72%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.16"]
[Round "8"]
[White "Tang, Andrew"]
[Black "Brattain, Mika A"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2478"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,77,-6,0,0,0,-14,-2,-2,34,19,39,45,41,66,108,75,90,77,91,83,83,75,58,64,140,59,106,107,100,33,33,33,91,85,187,195,189,186,191,190,185,185,199,191,237,220,317,303,370,280,246,246,230,245,253,648,631,630,690,697,860,833]} 1. d4 Nf6 2. c3 g6 3. Bg5 Bg7 4. Nd2 d5 5. e3 O-O 6. Bd3 Nbd7 {D00: 1 d4 d5: Unusual lines} 7. Ne2 e5 8. O-O h6 9. Bh4 Re8 $146 {LiveBook: 5 Games} ({Predecessor:} 9... c6 10. Bc2 Re8 11. c4 exd4 12. Nxd4 Qb6 13. cxd5 cxd5 14. Rb1 {0-1 (40) Gostisa,L (2470)-Kozul,Z (2595) Portoroz 1993}) 10. a4 c5 11. Re1 e4 12. Bc2 b6 13. c4 cxd4 14. exd4 g5 15. Bg3 Nh5 16. Nc3 Nxg3 17. hxg3 Bb7 18. cxd5 Nf6 19. Ndxe4 Nxd5 20. Qf3 {aiming for Bb3.} Re7 (20... Qd7 $14) 21. Rad1 (21. Bb3 $1 $16 Nxc3 22. bxc3) 21... Nxc3 22. bxc3 Qd5 23. Rb1 ({White should play} 23. Re3 $16) 23... Rae8 $14 24. Rb5 Qd8 ({Black should try} 24... Qd7 $14) 25. Re3 Kf8 {[#]} (25... Qd7 $16) 26. Bb3 $1 $18 g4 {[#]} 27. Qf4 $1 Bxe4 {[#]} 28. Rxe4 $1 {[%mdl 512] Strongly threatening Rf5!} Qc7 (28... Rxe4 29. Qxf7#) 29. Rxe7 $40 {[%mdl 128] Black is in trouble.} Rxe7 30. Qd2 Qc8 31. Qd3 Rc7 (31... Bf6 $142 32. Kh2 Kg7) 32. Rf5 Kg8 33. Qe4 Re7 34. Qf4 {[%cal Rf5f7]} ({Not} 34. Qxg4 Qxc3 35. Rd5 (35. Rf3 $2 Qc1+ 36. Kh2 Re1 $19) 35... Re8 $16) 34... Qc7 35. Rxf7 Re1+ $2 (35... Qxf4 36. Rxf4+ Kh8 37. Rxg4 Re1+ 38. Kh2 Rc1) 36. Kh2 {White threatens Rf8+ and mate.} Qxf4 {White is clearly winning.} 37. gxf4 Rb1 38. Be6 Rc1 39. Rxa7+ {Precision: White = 68%, Black = 37%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.16"]
[Round "8"]
[White "Troff, Kayden W"]
[Black "Colas, Joshua"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "2472"]
[BlackElo "2366"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,94,20,12,10,10,10,9,0,1,0,47,33,77,44,44,43,43,43,52,42,42,-61,-54,-64,-71,-93,-57,-68,93,85,87,77,118,115,105,97,148,120,140,133,129,144,169,167,217,213,195,200,177,140,138,129,125,135,137,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 {[%cal Be2e3,Be3e4][%mdl 32]} Nbd7 6. Qc2 Bd6 7. Bd3 O-O 8. O-O e5 9. cxd5 cxd5 10. e4 exd4 11. Nxd5 Nxd5 12. exd5 h6 13. b3 {D46: Semi-Slav: 5 e3 Nbd7 6 Bd3, Black avoids the Meran} Nf6 {[%cal Bd7f6,Bf6d5,Bd5b4][%mdl 32]} 14. Bb2 Nxd5 15. Qc4 Nb4 {[#]} 16. Be4 $146 ({But not} 16. Bxd4 $2 Bg4 $17) ({Reject} 16. Qxd4 Bxh2+ 17. Kxh2 Qxd4 $17) ({Find the theoretical novelty and annotate with similar games:} 16. Rfd1 Nxd3 17. Qxd3 Bc5 18. Bxd4 Bxd4 19. Qxd4 Qxd4 20. Nxd4 Bd7 {½-½ (20) Radjabov,T (2710)-Mamedyarov,S (2772) Moscow 2017}) 16... Be7 (16... Re8 $5 {[%cal Re8e4]} 17. Rae1 Be6 18. Qxd4 Bf8 $14) 17. Nxd4 Na6 18. Nf5 (18. Rad1 $5 {[%cal Rd4f5]} Qa5 19. Rfe1 $16) 18... Bxf5 $1 19. Bxf5 {aiming for Rad1.} Bf6 20. Rad1 Qb6 21. Ba3 Rfd8 $1 22. g3 ({Better is} 22. Bc1 $14) 22... Qa5 $1 $15 {[%csl LRa3,LRf5]} 23. Bg6 Qxa3 24. Qxf7+ Kh8 25. Be4 {[#] Black must now prevent Qg6.} Qf8 $2 ({Don't play} 25... Qxa2 $6 26. Qg6 $11) (25... Nc5 $15 {keeps the upper hand.} 26. Bb1 Qa5) 26. Qg6 $36 {[%csl Ge4][%cal Rg6h7][%mdl 2048] White is on the roll.} Qg8 {And now ...Nb4 would win.} 27. Bxb7 Nc5 28. Bxa8 Rxa8 29. Rfe1 Rf8 ({Black should try} 29... Ne6) 30. Re2 $16 Ne6 31. Qg4 Ng5 32. h4 Nf7 33. Qe6 Rd8 34. Rxd8 Qxd8 35. Kh2 Qd3 36. Qc8+ Kh7 37. Re3 Qg6 38. Qc5 h5 39. Qxa7 (39. Re6 $16) 39... Nh6 {The position is equal.} 40. Rf3 {[#] Hoping for Qa8.} Ng4+ 41. Kg2 {Strongly threatening Qa8.} Qe4 42. Qa4 Qb7 43. Qe8 Kh6 44. Qh8+ Kg6 45. Qe8+ Kh6 46. Qh8+ Kg6 47. Qe8+ Kh6 {Precision: White = 82%, Black = 61%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.17"]
[Round "9"]
[White "Liang, Awonder"]
[Black "Brown, Michael William"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "2536"]
[BlackElo "2508"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,107,27,20,0,41,25,22,16,12,-23,4,-46,19,20,48,15,9,0,0,16,58,55,54,46,58,44,55,39,74,74,79,84,100,60,69,60,76,63,70,64,71,69,68,51,68,67,103,95,100,109,102,112,109,71,159,183,251,267,266,245,255,187,243,242,357,342,470,486,518,535,544,545,520,522,553,483,939,925,947,963,956,940,806,579,902,896,922,891,1278,1241,1586,1572,2238,1417]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 {[%cal Bd2d3,Bd3d4][%mdl 32]} d6 5. O-O Bd7 6. Re1 g6 7. c3 Bg7 8. d4 O-O {LiveBook: 51 Games} 9. Ba4 {[%cal Bb5a4,Ba4c2,Bc2d3,Bd3f1][%mdl 32] C66: Ruy Lopez: Steinitz Defence} h6 10. Nbd2 Re8 11. h3 $146 {The position is equal.} ({Predecessor:} 11. dxe5 Nxe5 12. Nxe5 Rxe5 13. Bc2 Qe8 14. f3 Re7 15. Rf1 Rd8 16. Bb3 d5 17. exd5 {0-1 (24) Kobalia,M (2651)-Andreikin,D (2713) Khanty-Mansiysk 2013}) 11... a5 12. Qb3 Qc8 13. Qd1 Nb8 (13... exd4 $15 14. cxd4 Nb4) 14. Bc2 $11 Bc6 15. Bd3 b6 16. Qc2 Na6 17. a3 Qb7 18. b3 $1 {[%cal Bb2b3,Bb3b4,Bb4b5][%mdl 32]} Nh5 19. Bb2 Nf4 20. Bf1 $1 Bd7 21. b4 Nb8 22. b5 Be6 23. Kh2 Qc8 24. Ng1 g5 25. g3 Ng6 26. Nc4 f5 27. exf5 Bxf5 28. Qd2 {Threatens to win with dxe5.} Nd7 29. Bg2 Rb8 30. Re2 Be6 {[#]} 31. Ne3 $1 Nf6 32. Qc2 Bf7 33. Rae1 e4 34. f3 d5 (34... exf3 $142 35. Nxf3 Ne7) 35. fxe4 $16 dxe4 (35... Nxe4 $142 36. c4 Nd6) 36. Rf1 $18 Nf8 37. c4 {[#] Black must now prevent Ref2.} Bg6 38. Ref2 Qd8 (38... Nh5 $142 39. Nf5 Bxf5 40. Rxf5 Qe6) 39. d5 N8d7 (39... Nh5 {was worth a try.}) 40. Ne2 Ne5 41. Nd4 {White is clearly winning.} Nh5 {White should prevent ...Nd3.} 42. Ndf5 (42. Ne6 Rxe6 43. dxe6 Qd6 $14) 42... Nf3+ 43. Bxf3 exf3 44. Rxf3 Kh7 45. g4 Bxb2 (45... Nf6 $142 46. Re1 Bh8) 46. gxh5 ({Less strong is} 46. Qxb2 Qf6 $16) 46... Be5+ 47. Kh1 Bxh5 48. Ne7+ Kg7 49. Nc6 $1 {[%csl LRb8,LRd8]} Qd7 50. Nf5+ Kh8 51. Re3 Bf6 52. Nxb8 Rxb8 53. Re6 Rf8 54. Ng3 {Precision: White = 66%, Black = 38%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.17"]
[Round "9"]
[White "Checa, Nicolas D"]
[Black "Chandra, Akshat"]
[Result "1/2-1/2"]
[ECO "D43"]
[WhiteElo "2415"]
[BlackElo "2484"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,83,12,24,18,30,0,0,0,0,-31,-19,-18,-12,-27,-25,-54,-34,-34,-13,-22,-23,-33,-23,-16,-21,-44,-27,-33,-19,-20,-11,-25,-5,-12,-8,-20,-6,-5,-6,-6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 c6 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 g6 8. Bd3 {D43: Semi-Slav: 5 Bg5 h6} Bg7 9. O-O O-O 10. Re1 dxc4 11. Bxc4 Nd7 12. e4 e5 {[%cal Re5d4] LiveBook: 30 Games} 13. d5 Rd8 14. Re3 b5 15. dxc6 bxc4 16. Nd5 Qe6 $1 17. cxd7 Rxd7 18. Qa4 (18. b3 {is interesting.} cxb3 19. Qxb3 Bb7 20. Rd3 Bc6 21. Rad1) 18... Bb7 19. Qxc4 Bxd5 20. exd5 Qxd5 (20... Rxd5 {is more complex.} 21. Rae1 Rc8 22. Qb3 Qd6 23. Rc3 Rd8) 21. Qxd5 Rxd5 {[#]} 22. Rae1 $146 Re8 23. g4 Kh7 24. Nh4 Rb8 25. b3 $1 Rb4 26. Re4 a5 27. Kg2 Rd2 (27... Rdd4 $5 {[%cal Rd4e4]} 28. Kf3 a4 29. Rxd4 exd4 $17) 28. Rxb4 {The position is equal.} axb4 $11 {[%mdl 4096] Endgame KRB-KRN} 29. Re4 Bf8 {White must now prevent ...Bc5.} 30. Nf3 Rxa2 {Hoping for ...Bc5.} 31. Nxe5 Rb2 32. Nd7 Bd6 33. Nf6+ Kh8 34. h4 Bc5 35. g5 hxg5 36. hxg5 {[#] Re8+ would kill now.} Rxf2+ 37. Kg3 {Threatening mate with Re8+.} Kg7 38. Ne8+ Kf8 39. Nf6 {Intending Re8+ and mate.} Kg7 40. Ne8+ Kf8 41. Nf6 {[#] White threatens Re8+ and mate.} Kg7 42. Ne8+ {Precision: White = 67%, Black = 71%.} 1/2-1/2

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.17"]
[Round "9"]
[White "Colas, Joshua"]
[Black "Li, Ruifeng"]
[Result "0-1"]
[ECO "A40"]
[WhiteElo "2366"]
[BlackElo "2568"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,106,41,37,5,29,-2,26,22,24,19,39,21,33,26,75,61,70,0,0,-7,0,0,-9,-40,-50,-67,-73,-83,-94,-82,-47,-93,-48,-46,-40,-57,-44,-68,-55,-83,62,67,61,83,72,80,66,70,48,38,37,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-110,-110,-71,-87,-162,-138,-159,-162,-197,-139,-129,-14,-69,0,-8,0,-177,-177,-1417,-1450,-29991,-29992,-29994,-29994,-29995,-29996]} 1. d4 g6 2. Nf3 Bg7 3. g3 d5 4. Bg2 e6 5. O-O Ne7 6. c4 O-O 7. Qc2 Nbc6 {A13: English Opening: 1...e6} 8. Rd1 a5 {LiveBook: 10 Games} 9. a3 b6 {The position is equal.} 10. b3 Ba6 (10... a4 $5) 11. cxd5 exd5 12. Bb2 a4 $146 {...axb3 is the strong threat.} ({Predecessor:} 12... Re8 13. Nc3 Nf5 14. e3 Nce7 15. Rac1 {1-0 (61) Vaulin,A (2550)-Alienkin,A (2365) Budapest 1998}) 13. bxa4 Na5 14. Ne5 f6 15. Nd3 Qd7 16. Nc3 (16. Bc3 $14) 16... Bc4 $1 $36 {[%mdl 2048] Black has good play.} 17. Nc1 f5 18. e3 g5 {[%cal Bg6g5,Bg5f4,Bf4f3][%mdl 32] aiming for ...f4.} 19. N3e2 Ng6 20. Bh3 Qf7 $1 21. Rf1 f4 22. exf4 gxf4 {White must now prevent ...Rae8.} 23. Nd3 Bxd3 24. Qxd3 f3 25. Nc3 Nb3 26. Rae1 Nxd4 27. Kh1 c5 (27... Rad8 $1 $17) 28. Nxd5 $1 $14 Qxd5 {[#]} 29. Be6+ $1 {[%mdl 512]} Qxe6 (29... Nxe6 30. Qxd5) 30. Rxe6 Nxe6 31. Bxg7 $1 Nxg7 32. h4 Kh8 33. Qb5 {[%mdl 1024] White has compensation.} Rf6 34. Re1 $1 h5 35. Qd7 Kh7 36. Kh2 Raf8 37. Qc7 R8f7 38. Qd8 Rc6 39. a5 bxa5 40. Qxa5 Nf5 41. Qd8 (41. Qb5 $11 {remains equal.} Rcc7 42. a4) 41... Nh6 $1 $17 42. Qd5 Rcc7 $1 43. Rc1 (43. Kg1 $17 {might work better.}) 43... Rf5 $19 44. Qd6 Re7 $1 45. a4 {[#]} Ng4+ ({Black should play} 45... c4 $1 $19 46. Kg1 (46. Rxc4 Ng4+) 46... Ng4) 46. Kg1 $17 {[#]} Re2 (46... c4 $1 $17 {White should prevent ...Rff7.} 47. Qb4 (47. Rxc4 Re1#) 47... Re2) 47. Rf1 $1 $11 Kh6 ({Black should try} 47... N6e5 $15) 48. a5 c4 49. a6 $2 (49. Qa3 $11 {and White stays safe.}) 49... Ra5 $19 50. Qc6 $2 {[#]} (50. Qd4) 50... Nxf2 $1 {[%mdl 512]} 51. g4 (51. Rxf2 Ra1+) 51... hxg4 {[%cal Bh5g4,Bg4g3][%mdl 32] Black mates.} 52. a7 Nh3+ 53. Kh1 g3 {Precision: White = 61%, Black = 60%.} 0-1

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.17"]
[Round "9"]
[White "Brattain, Mika A"]
[Black "Troff, Kayden W"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2364"]
[BlackElo "2472"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,61,-4,0,-20,-8,-16,-11,-8,39,49,50,38,53,47,38,32,28,35,29,-91,0,13,211,202,199,200,202,180,202,192,186,215,293,192,145,204,176,154,164,73,1775,1784]} 1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Qb3 Nb6 6. d4 Bg7 7. e4 Bg4 {D90: Grünfeld: 4 Nf3 Bg7 sidelines} 8. Bb5+ c6 9. Ng5 O-O 10. Be2 Bxe2 11. Nxe2 Na6 {LiveBook: 22 Games} 12. Qh3 {[%csl Gg5][%cal Rh3h7]} h6 13. Nf3 Qd7 14. Qh4 {[#]} Kh7 $146 ({Predecessor:} 14... h5 15. h3 {0-1 (37) Fressinet,L (2714)-Sutovsky,E (2687) Istanbul 2012}) 15. O-O c5 {[%cal Rc5d4]} 16. d5 Nb4 17. Bg5 Rae8 18. Rad1 Nxa2 19. e5 Nxd5 20. Nf4 {[#]} (20. e6 $1 $11 {was the only way to keep the balance.} Qxe6 21. Bxh6 $1 {[%mdl 512]}) 20... Nab4 ({Black should play} 20... e6 $1 $17 21. Ne2 Nab4) 21. e6 $1 $11 {[%cal Re6d7]} Qd6 $2 (21... Qc6 $11 {and Black has nothing to worry.}) 22. exf7 $18 Rxf7 {[#]} 23. Bxh6 $1 $40 {[%mdl 640] White goes for the king.} Kg8 {[%cal Rf7f4] Hoping for ...Rxf4.} (23... Bxh6 24. Ng5+) 24. Bxg7 Rxg7 25. Nxd5 Nxd5 26. Rfe1 {[%cal Bf1e1,Be1e5,Be5d5][%mdl 32] Black must now prevent Re5.} Rf8 27. Re5 e6 {Threatens to win with ...Rxf3!} 28. Qe4 {[%mdl 1024] White has strong compensation.} Rf6 29. Ng5 Re7 30. g3 (30. h3 $18) 30... Qc6 $2 {[%mdl 8192]} (30... Rf5 $16 31. Rxf5 gxf5) 31. Rexd5 {Precision: White = 63%, Black = 36%.} 1-0

[Event "USA-ch Juniors 2017"]
[Site "Saint Louis"]
[Date "2017.07.17"]
[Round "9"]
[White "Liu, Bovey"]
[Black "Tang, Andrew"]
[Result "0-1"]
[ECO "C55"]
[WhiteElo "2228"]
[BlackElo "2478"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2017.??.??"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,98,52,58,31,32,40,50,43,39,34,44,33,30,37,54,41,52,39,57,56,56,63,69,59,56,28,47,41,50,50,57,26,29,24,26,0,-7,0,0,0,0,0,0,-48,-118,-81,0,-286,-329,-390,-168,-168,-107,-235,-243,-233,-223,-634,-633,-570,-625,-595,-597,-589,-579,-660,-660,-660,-660,-660,-660,-706,-706,-795,-792,-993,-882,-882,-882,-995,-985]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O O-O 6. Re1 d6 7. a4 Kh8 8. h3 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack} Ng8 9. Nc3 f5 10. Nd5 Bf6 {LiveBook: 9 Games} 11. c3 fxe4 12. dxe4 Nce7 13. Nxf6 $146 ({Predecessor:} 13. a5 a6 14. b4 Nxd5 15. Bxd5 Ne7 {½-½ (48) Fedorchuk,S (2634)-Bartel,M (2677) Lublin 2012}) 13... Nxf6 14. Ng5 {And now Nf7+ would win.} Qe8 15. Ne6 Bxe6 $1 16. Bxe6 Qg6 17. Bc4 h6 18. Qe2 Rae8 19. Bd3 Nh5 20. Qg4 Qf7 21. Be3 a6 22. Rad1 Nf6 {[%cal Bh5f6,Bf6h7,Bh7g5,Bg5f3][%mdl 32]} 23. Qe2 Ng6 24. Bc4 Qe7 25. Kh2 Nf4 26. Qc2 Nh7 27. g3 Ng5 28. gxf4 exf4 {Strongly threatening ...Nf3+.} 29. Bc1 $1 Nf3+ $40 {[%mdl 128] White needs to defend precisely.} 30. Kg2 Ne5 31. Bf1 Qh4 $1 32. Kh1 g5 (32... Rf6 $1 $17 {[%cal Rf6g6] Hoping for ...Rg6.} 33. b4 Rg6) 33. Rd5 $2 {[%mdl 8192]} (33. c4 $1 $11 Rf6 34. b3) 33... g4 $19 34. Rxe5 Rxe5 (34... dxe5 $142 35. Qe2 Rg8) 35. Qe2 Rg5 ({Stronger than} 35... gxh3 36. Qf3 $11) (35... Rf6 $1 $19 36. Qxg4 Qxf2) 36. Rd1 (36. Bd2 $17) 36... gxh3 {( -> ...h2)} 37. Qf3 Rg4 {[#]} 38. Bxh3 $2 (38. Be3 $1 {[%mdl 512]} c5 (38... fxe3 39. Qxf8+) 39. Bc1) 38... Rfg8 {Black is clearly winning.} 39. Kh2 {[#] intending Rh1.} Rg2+ $1 {[%mdl 512]} 40. Qxg2 Rxg2+ 41. Kxg2 {[#]} f3+ $1 {[%mdl 512]} 42. Kxf3 {Bf5 is the strong threat.} Qxh3+ {[%mdl 4096] Endgame KQ-KRB} 43. Ke2 Qg4+ 44. f3 Qg2+ 45. Ke3 h5 {[%cal Bh6h5,Bh5h4,Bh4h3,Bh3h2][%mdl 32]} 46. Bd2 h4 47. Be1 h3 48. Rd2 {[#]} Qxd2+ $1 {[%mdl 512]} 49. Bxd2 h2 {Precision: White = 46%, Black = 73%.} 0-1

