[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "1"]
[White "Stepanov, Vitaliy V."]
[Black "Kikh, Andriy"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2160"]
[BlackElo "1746"]
[Annotator "TA"]
[PlyCount "36"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 9,35,-10,-7,-5,60,-17,90,39,39,-18,8,-14,28,-54,-42,-51,-52,-49,-60,-49,-60,-158,-164,-226,-207,-279,-269,-29999]} 1. d4 c5 2. e3 d5 3. Nf3 Nc6 4. b3 Bf5 5. a3 e6 6. Bb2 {[#] D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Rc8 $146 (6... cxd4 $11 7. Nxd4 Nxd4 8. Qxd4 a6) ({Predecessor:} 6... Nf6 7. Bd3 Bxd3 8. cxd3 Bd6 9. O-O O-O 10. Nbd2 Rc8 11. dxc5 Bxc5 12. Rc1 Bd6 {1-0 Ryszka,M (1186)-Kollbek,J (1193) Krakow Winter op-B 2022 (4)}) 7. Bd3 (7. dxc5 $1 $14 Nf6 8. b4) 7... Bg6 {[#]} (7... Bxd3 $1 $11 8. Qxd3 cxd4) 8. Bxg6 ({White should play} 8. dxc5 $1 $16 a5 9. Nc3) 8... hxg6 $14 9. Nbd2 (9. dxc5 $1 $14 Bxc5 10. Bxg7) 9... Nf6 10. O-O Qc7 11. Ne5 (11. dxc5 $11 Bxc5 12. h3) 11... Bd6 $15 12. f4 cxd4 13. exd4 Qb6 {[%csl LRd4,LRe5]} 14. Ndf3 Ne4 {...f6 is the strong threat.} 15. g3 (15. c4 $15 Bxe5 16. fxe5) 15... g5 $17 {aiming for ...gxf4. Black is much more active.} 16. Nxc6 (16. c4 $142 Bxe5 17. fxe5) 16... Qxc6 $19 17. Nxg5 Qxc2 {[%csl Gh8][%cal Rc2h2]} 18. Nxe4 $2 {[#]} (18. Qxc2 $19 Rxc2 19. Rac1 Rcxh2 20. Rc8+ Ke7 21. Rxh8 Rxh8 22. Nxe4 dxe4 23. Kg2) 18... Qxh2# {Weighted Error Value: White=0.82/Black=0.25 (precise)} 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "1"]
[White "Kozak, Dmytro"]
[Black "Moroz, Mykola"]
[Result "1-0"]
[ECO "B24"]
[WhiteElo "1937"]
[BlackElo "1323"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 9,54,12,20,14,33,11,17,14,14,0,45,7,14,-2,17,19,36,29,123,-52,-52,-111,-107,-108,0,0,0,29,133,138,130,118,287,115,108,102,179,194,338,318,669,595,29989,29990,29997,29998,29999]} 1. e4 c5 2. Nc3 Nc6 3. g3 d6 4. Bg2 Nf6 5. Nge2 Bd7 6. O-O {B24: Closed Sicilian: 3 g3 sidelines.} e6 {[%cal Be7e6,Be6e5][%mdl 32]} 7. d3 h6 8. h3 {The position is equal.} Be7 9. f4 {[#]} e5 $146 ({Predecessor:} 9... a6 10. g4 Nh7 11. f5 Bf6 12. Nf4 O-O 13. fxe6 Bxe6 14. Ncd5 Bd4+ 15. Kh1 Be5 {1-0 Matczyk,B (2013)-Kostowski,A (1774) Chorzow op 2010 (1)}) 10. f5 Nd4 11. Be3 O-O 12. g4 Ne8 13. Ng3 Nf6 (13... Bh4 $11 14. Kh2 b6) 14. h4 $2 (14. Nd5 $16) 14... Nh7 $15 15. Nh5 (15. h5 $15) 15... Bxh4 $17 {...g6 is the strong threat.} 16. Nd5 {[%cal Of5f6]} Bc6 (16... Nc6 $17 {And now ...Nb4 would win.} 17. f6 g6 18. Bxh6 gxh5 19. gxh5 Nxf6 20. Bxf8 Kxf8 21. Nxf6 Bxf6) 17. f6 $1 $11 {[%mdl 64] Deflection} Nxf6 (17... gxf6 18. Bxh6 Re8 19. g5 Bxg5 20. Ndxf6+ Bxf6 21. Qg4+ Bg5 22. Nf6+ Qxf6 23. Rxf6 $18) (17... Bxd5 18. fxg7 Bc6 19. gxf8=N (19. gxf8=B Qxf8 20. Rc1 Ne6 $16) 19... Qxf8 20. c3 $16) 18. Ndxf6+ Bxf6 (18... gxf6 $11 19. Bxh6 Bg5) 19. Nxf6+ $16 gxf6 20. Bxh6 Re8 $2 {[#]} (20... Ne6 $16) 21. c3 (21. g5 $1 $18 {[%cal Rg5f6]} f5 22. c3 {[%mdl 64] Deflection} (22. exf5 Bxg2 23. Kxg2 Qd7 $18)) 21... Ne6 22. Qf3 {[%cal Of1f2][%mdl 1024] White has strong compensation.} a6 (22... Nf4 $16) 23. Rf2 $18 ({Don't do} 23. Qxf6 $6 Qxf6 24. Rxf6 Bb5 $16) 23... Kh7 {[#]} (23... Nf4 {might work better.} 24. Bxf4 exf4 25. Qxf4 Qe7) 24. Qh3 $1 ({And not} 24. Qxf6 Qxf6 25. Rxf6 Rg8 $11) 24... Kg8 $2 (24... Rh8 25. Raf1 Kg8) 25. Raf1 Ng5 26. Bxg5 {[%mdl 64] Remove Defender. White mates.} fxg5 27. Rxf7 {[%csl Gf7][%cal Rh3h7]} Qb6 28. Qh7# {Weighted Error Value: White=0.27 (precise) /Black=0.83} 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "1"]
[White "Kutyra, Myroslav"]
[Black "Zanko, Rostyslav"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "1764"]
[BlackElo "1300"]
[Annotator "NA RC COMBH"]
[PlyCount "77"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 d5 2. c4 c6 3. Nc3 Bf5 4. cxd5 cxd5 5. Qb3 Qd7 6. Qxd5 Qxd5 7. Nxd5 Kd8 8. Bf4 Na6 9. a3 e6 10. Nc3 Nf6 11. f3 Nc7 12. e4 Bg6 13. Rc1 Rc8 14. g4 Be7 15. Bg2 Kd7 16. h4 h6 17. Nge2 Rhd8 18. Be5 Ke8 19. Kf2 Bd6 20. Bxd6 Rxd6 21. e5 Rb6 22. exf6 gxf6 23. Na4 Rc6 24. Rxc6 bxc6 25. f4 Nd5 26. Rc1 Bd3 27. Bxd5 exd5 28. Ke3 Bb5 29. Nac3 Bc4 30. Ng3 Rb8 31. Rc2 Kd7 32. Nf5 Rg8 33. Nxh6 Rh8 34. g5 fxg5 35. fxg5 f6 36. Rf2 fxg5 37. hxg5 a6 38. Na4 Rg8 39. Nxg8 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "1"]
[White "Tsertsvadze, Anatoliy"]
[Black "Ilyk, Vitalii"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1733"]
[BlackElo "1266"]
[Annotator "NA RC COMBH"]
[PlyCount "51"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 d5 2. Nf3 Nf6 3. Bf4 e6 4. e3 c5 5. c3 Be7 6. Nbd2 Nbd7 7. Bd3 c4 8. Bc2 b5 9. a3 Bb7 10. h3 h6 11. O-O Nh5 12. Bh2 f5 13. Ne5 Nhf6 14. Ng6 Rg8 15. Nf3 Nf8 16. Nxf8 Kxf8 17. Ne5 g5 18. g4 fxg4 19. Nxg4 Nxg4 20. Qxg4 Bc8 21. Qh5 Rh8 22. f4 Qe8 23. Bg6 Qd7 24. fxg5+ Kg7 25. Be5+ Kg8 26. Bf7+ 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "1"]
[White "Pupko, Maksym"]
[Black "Koptsiukh, Vladimir"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1301"]
[BlackElo "2021"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 11,71,-25,9,0,14,0,14,-10,-8,0,0,-12,0,-102,-89,-107,-95,-113,-74,-78,-54,-147,-20,-18,-1,-4,110,-12,-15,-16,17,15,40,4,43,39,91,46,134,-60,47,10,55,58,54,-1,2,-1,133,0,0,0,880,-29997,-964,-29998,-905,-885,-695,-692,29998,29999]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. Nc3 Nf6 5. d3 d6 6. Be3 Bb6 7. a3 {[#] C50: Hungarian Defence and Giuoco Pianissimo.} (7. Bg5 {feels hotter.} Bg4 8. Nd5 Nd4 9. c3) 7... Nd4 $146 ({Predecessor:} 7... O-O 8. O-O h6 9. Ne2 Be6 10. Bxe6 fxe6 11. c3 Qe7 12. a4 Rf7 13. b4 Raf8 14. a5 Bxe3 15. fxe3 {½-½ Douchez,T (1674)-Rohrer,C (2230) Cappelle Online Bullet op blitz 2021 (6)}) 8. Bxd4 exd4 9. Nd5 {The position is equal.} Nxd5 10. Bxd5 c6 11. Bb3 O-O 12. Qd2 (12. O-O $11 {keeps the balance.}) 12... Ba5 $1 $17 13. c3 dxc3 14. bxc3 Qf6 15. d4 Bg4 (15... Re8 $5 {[%cal Re8e4]} 16. Qe3 Bf5 $17) 16. e5 (16. Qe3 $15) 16... dxe5 (16... Qf5 $17 17. Bc2 Qh5) 17. Nxe5 $11 Rfe8 18. O-O {[%csl LRf7,LRg4]} Bh5 (18... Be6 $1 $11 19. Qb2 c5) 19. Nc4 {White is more active.} (19. f4 $1 $16 {Threatens to win with g4.} Qh4 20. Rae1) 19... Bc7 20. Rfe1 Qh4 21. Ne5 Rad8 {[%cal Oe8e5] aiming for ...Rxe5!} (21... Bxe5 {simplifies} 22. dxe5 Qd8 23. Qf4 Bg6) 22. Qe3 (22. g3 {simplifies} Qf6 23. f4 Bg6 24. Qe3) 22... c5 {[%cal Rc5d4]} 23. g3 $1 cxd4 (23... Qh3 $14) 24. cxd4 $40 {[%mdl 128] White mounts an attack.} (24. gxh4 $2 {perishes.} dxe3 25. f4 Bxe5 26. fxe5 Rxe5 $19) 24... Qf6 {[#]} (24... Qxd4 $14 25. Qxd4 Rxd4 26. Nxf7 {[%mdl 64] Discovered Attack} Rb8) 25. Qc3 $2 (25. Nd7 $1 $16 Rxe3 26. Nxf6+ gxf6 27. Rxe3 (27. fxe3 Ba5 $16)) 25... Bb8 ({Black should play} 25... Bb6 $15 26. Re4 Bxd4 {[%mdl 64] Remove Defender} 27. Rxd4 Rxd4 28. Qxd4 Qxe5 29. Qxe5 Rxe5) 26. Nd7 {[%mdl 64] Deflection, Back Rank} Qd6 27. Rxe8+ Rxe8 28. Nc5 (28. Ba4 $14) 28... Qc6 29. Rc1 (29. Ba4 $5 b5 $8 30. Bc2 $11) 29... Bf3 {[#]} (29... Bd6 $11 {remains equal.}) 30. Qc4 (30. Ba4 $1 $16 {[%cal Ra4c6]} b5 31. Bxb5 {[%mdl 64] Deflection} Qxb5 32. Qxf3) 30... Re7 {[%cal Ob8f4]} 31. d5 Qh6 {[%mdl 8192]} (31... Qe8 $11 32. Qc3 Bg4) 32. Rc3 $4 {[%mdl 8192]} (32. Nd7 $18 Re8 33. Qc8 {[%mdl 64] Double Attack} Qxc1+ 34. Qxc1) 32... Re1+ 33. Qf1 Rxf1+ (33... Qh3 $142 34. Qxe1 Qg2#) 34. Kxf1 $19 Bh5 {Strongly threatening ...Bg4.} 35. Nd7 {[%cal Rc3c8]} Qd6 $4 {[%mdl 8192]} (35... g5 $19 36. Nxb8 Qd6) 36. Rc8+ {Ingenious play by Pupko!   Weighted Error Value: White=0.59/Black=0.98} 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "1"]
[White "Tyurin, Rostyslav"]
[Black "Makhnivchyk, Andriy"]
[Result "1-0"]
[ECO "B70"]
[WhiteElo "1262"]
[BlackElo "1712"]
[Annotator "NA RC COMBH"]
[PlyCount "114"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 g6 5. Nc3 Bg7 6. Bb5+ Bd7 7. Bxd7+ Qxd7 8. O-O Nf6 9. Be3 O-O 10. Nf3 Nc6 11. h3 Rac8 12. Qd2 Na5 13. Qe2 Rxc3 14. bxc3 Nxe4 15. Bd4 Nxc3 16. Qd2 Bxd4 17. Nxd4 Qc7 18. Nf3 Rc8 19. Rfe1 Kg7 20. Qg5 f6 21. Qd2 Nb5 22. Nd4 Nxd4 23. Qxd4 Nc6 24. Qd5 Ne5 25. Rab1 b6 26. f4 Nc4 27. Re6 Kf8 28. Rbe1 Re8 29. Kh1 a6 30. Qd3 b5 31. Qg3 Qc5 32. Qh4 Qh5 33. Rxf6+ Kg7 34. Qxh5 gxh5 35. Rfe6 Kf7 36. Rh6 Kg7 37. Rxh5 Na3 38. c3 Nc4 39. Rd5 Rf8 40. Rxe7+ Kh8 41. Rh5 Rxf4 42. Rhxh7+ Kg8 43. Ra7 Nd2 44. Rhc7 Ne4 45. Rc8+ Rf8 46. Rxf8+ Kxf8 47. Rxa6 Nxc3 48. Rxd6 Nxa2 49. Rb6 b4 50. Rb7 Ke8 51. h4 Kd8 52. h5 Kc8 53. Rb5 Kc7 54. h6 Kc6 55. Rb8 Kc5 56. h7 Nc3 57. h8=Q Kd5 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "2"]
[White "Kikh, Andriy"]
[Black "Gavker, Markiyan"]
[Result "1-0"]
[ECO "A31"]
[WhiteElo "1746"]
[BlackElo "1310"]
[Annotator "NA RC COMBH"]
[PlyCount "104"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. c4 c5 3. Nf3 cxd4 4. Nxd4 Nc6 5. Nb3 e6 6. Bf4 Bb4+ 7. N1d2 Ne4 8. Qc2 Nxd2 9. Bxd2 Bxd2+ 10. Qxd2 O-O 11. e3 Qf6 12. Be2 Rd8 13. c5 b6 14. O-O bxc5 15. Nxc5 d5 16. Rac1 Ne5 17. Qd4 Nd7 18. Nb3 Nb6 19. Qxf6 gxf6 20. Rc7 e5 21. Rfc1 Bf5 22. Ba6 Kg7 23. h3 Be6 24. Nc5 Rd6 25. b3 d4 26. e4 Nd7 27. Nxe6+ fxe6 28. Bb5 Rd8 29. Rxa7 Kg6 30. Bd3 Nb6 31. a4 Nc8 32. Rac7 Nb6 33. a5 Na8 34. Rc8 h6 35. b4 R6d7 36. b5 Rd6 37. b6 Rxc8 38. Rxc8 Nxb6 39. axb6 Rxb6 40. Rc1 f5 41. f3 Kf6 42. h4 h5 43. Kh2 Rb3 44. Rd1 Rb8 45. Rd2 Rg8 46. Ra2 Rc8 47. exf5 Rc3 48. Be4 exf5 49. Ra6+ Kg7 50. Bxf5 d3 51. Rd6 Rc2 52. Rxd3 Rb2 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "2"]
[White "Katsan, Danylo"]
[Black "Kozak, Dmytro"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1447"]
[BlackElo "1937"]
[Annotator "TA"]
[PlyCount "147"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 10,147,0,0,27,21,97,58,65,0,16,17,20,4,5,4,8,-15,8,0,42,43,59,19,42,16,34,35,39,22,47,34,37,24,39,40,67,24,24,25,18,27,25,21,23,0,5,8,15,16,45,11,11,14,10,-20,16,14,19,16,13,25,20,13,158,162,174,124,364,0,75,70,115,21,166,175,253,260,301,303,352,358,370,288,366,356,410,294,317,277,315,295,298,289,353,337,395,395,389,361,343,235,295,278,541,541,541,541,546,541,716,541,541,404,388,367,519,489,593,387,620,387,620,606,595,351,458,451,584,581,574,574,606,0,0,0,0,0,29993,29994]} 1. Nf3 Nf6 2. d4 d5 3. Bf4 e6 4. e3 Bd6 5. Ne5 O-O 6. Nd2 h6 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} 7. c3 b6 (7... c5 $11) 8. Bd3 Bb7 {[#] White is slightly better.} 9. Qe2 $146 {White has more active pieces.} ({White should play} 9. h4 $14) ({Predecessor:} 9. g4 Ne4 10. Ndf3 c5 11. h4 Qe8 12. h5 Bxe5 13. Nxe5 Qe7 14. f3 Ng5 15. Bxg5 hxg5 {½-½ Glatz,C (1671)-Zecirovic,G (1806) Lugano Paradiso op 2020 (5)}) 9... Nbd7 10. O-O Qe7 11. Nxd7 (11. Qf3 {looks sharper.} c5 12. Rfe1 Bc7 13. a4) 11... Qxd7 12. Bxd6 Qxd6 13. f3 c5 14. Rad1 cxd4 15. exd4 Qf4 16. Rfe1 Rfd8 17. Bb1 Rac8 18. Nf1 Nd7 19. Qd3 Nf8 {Dodges Qh7+} 20. Re5 Bc6 21. Ng3 (21. g3 $5 Qf6 $8 22. Ne3 $11) 21... Be8 22. Rde1 (22. Nh5 {seems wilder.} Qh4 23. g3 Qe7 24. Nf4) 22... f6 23. R5e2 (23. Ne2 {keeps more tension.} Bb5 24. Qc2 Bxe2 25. R5xe2 h5 26. Re3) 23... Bg6 24. Qa6 Bxb1 25. Rxb1 Rc7 26. Rbe1 Re7 27. Qa3 Rde8 28. Nf1 Qc7 29. Ne3 {[%cal Oe3d5] And now Nxd5! would win.} Ng6 30. Qb3 Nf4 31. Rd2 Qd7 32. Qc2 Qb5 33. g3 Nh3+ 34. Kg2 Ng5 35. Rde2 {aiming for h4.} Qd7 36. Ng4 {[%cal Be3g4,Bg4e5,Be5d3,Bd3f4][%mdl 32]} f5 (36... Kh8 $11) 37. Ne5 $36 {[%mdl 2048] Black is under strong pressure.} Qd6 38. Qa4 (38. Ng6 $18) 38... Kh7 $2 (38... Nh7 $16 {was called for.} 39. Qc6 Qc7) 39. Qc2 $2 (39. h4 $18 Ne4 40. fxe4 dxe4 41. h5) 39... Nf7 (39... Kg8 $1 $11 {remains equal.}) 40. Nd3 Kg8 41. h4 (41. Nf4 $16) 41... Qd7 (41... e5 $11 {and Black has nothing to worry.}) 42. Nf4 $18 Nd8 (42... Qd6 $142 43. Ng6 Rb7) 43. Ng6 Rf7 44. Ne5 $1 {[%csl LRd7,LRf7]} Qe7 45. Nxf7 Qxf7 46. Re5 Qd7 47. Qe2 Kf7 48. Re3 Qd6 49. Qd3 Re7 50. Re5 Nc6 51. R5e2 Qc7 52. h5 Qd6 53. g4 Qf4 54. Kh3 Qg5 55. Qe3 Qf6 56. Qf4 g5 $2 (56... fxg4+ 57. Kxg4 b5) 57. hxg6+ Qxg6 58. gxf5 Qh5+ 59. Kg2 exf5 60. Rxe7+ Nxe7 {[%mdl 4096] Endgame KQR-KQN} 61. Re5 Qg6+ 62. Kf2 {[%cal Bg2f2,Bf2e1,Be1d2,Bd2d3,Bd3e3][%mdl 32]} Qf6 (62... Qg5 $142 63. Qxg5 hxg5) 63. Re2 Qg6 64. Ke1 {Qc7 is the strong threat.} Qg1+ 65. Kd2 Qb1 $2 (65... Qg5 66. Qe3 Ng6) 66. Qc7 (66. Qxh6 Qxb2+ 67. Kd1 Qb1+ 68. Qc1 (68. Kd2 Ng6 $16) 68... Qd3+ 69. Ke1 Qxf3 $18) 66... Qxb2+ 67. Kd3 Qb1+ {[#]} 68. Ke3 $1 {White wants to mate with Kf2.} (68. Kd2 Qb2+ 69. Ke1 Qc1+ 70. Kf2 Qg5) 68... Qc1+ 69. Kf2 Qg5 70. Qxa7 f4 71. Qd7 $2 ({Not} 71. Qxb6 Qg3+ 72. Kf1 Qxf3+ 73. Ke1 Qxc3+ 74. Kd1 Qd3+ 75. Rd2 (75. Ke1 Qc3+ 76. Kd1 Qd3+ 77. Rd2 Qf3+ 78. Kc2 Nf5 $11) 75... Qf3+ 76. Kc2 Nf5 $11) ({Better is} 71. Kf1 $18) 71... Qg3+ $11 72. Kf1 Qxf3+ 73. Rf2 {Dancing on a razor blade.} Qh3+ $2 {[%mdl 8192] [#]} 74. Qxh3 {Weighted Error Value: White=0.32/Black=0.40} 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "2"]
[White "Gurgula, Ostap"]
[Black "Kutyra, Myroslav"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "1430"]
[BlackElo "1764"]
[Annotator "NA RC COMBH"]
[PlyCount "94"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Bd3 Bg6 6. c3 Ne7 7. Qc2 Bxd3 8. Qxd3 Nf5 9. Nbd2 Nd7 10. Nb3 Be7 11. Be3 Qc7 12. h3 O-O 13. g4 Nxe3 14. Qxe3 c5 15. Rc1 a5 16. h4 Rac8 17. Ke2 Qb6 18. Qd2 a4 19. Na1 Qb5+ 20. Ke1 cxd4 21. Nxd4 Qb6 22. f4 Nc5 23. Rc2 Ne4 24. Qe3 a3 25. b3 Rxc3 26. Rxc3 Nxc3 27. Ndc2 Qxe3+ 28. Nxe3 Nxa2 29. Kd2 Rc8 30. f5 Bb4+ 31. Ke2 Nc3+ 32. Kf3 d4 33. Nc4 b5 34. Nb6 Rd8 35. f6 Ba5 36. Nc4 bxc4 37. bxc4 d3 38. Nb3 Bb4 39. g5 d2 40. Nxd2 Rxd2 41. Ke3 Rd8 42. h5 a2 43. g6 hxg6 44. hxg6 gxf6 45. gxf7+ Kxf7 46. Rh7+ Kg6 47. Ra7 Bc5+ 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "2"]
[White "Rubakha, Oleksiy"]
[Black "Tsertsvadze, Anatoliy"]
[Result "0-1"]
[ECO "C01"]
[WhiteElo "1362"]
[BlackElo "1733"]
[Annotator "NA RC COMBH"]
[PlyCount "106"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bg4 5. h3 Bh5 6. Be2 Bd6 7. O-O Ne7 8. c4 c6 9. b3 O-O 10. Bb2 Nd7 11. Nc3 Rc8 12. Ne1 Bg6 13. Nc2 Bb8 14. Ne3 Qc7 15. g3 f5 16. Ng2 f4 17. f3 fxg3 18. Ba3 Nf6 19. cxd5 Qd7 20. Nf4 Bxf4 21. Kg2 Nfxd5 22. Nxd5 Nxd5 23. Bc4 Bf7 24. Bxd5 Bxd5 25. Bxf8 Rxf8 26. Qd3 Be6 27. Rh1 Bd5 28. Rhf1 Be6 29. Rh1 c5 30. Rad1 cxd4 31. Qxd4 Qb5 32. Rhe1 Bxh3+ 33. Kxh3 Qh5+ 34. Kg2 Qh2+ 35. Kf1 g2+ 36. Ke2 g1=Q+ 37. Kd3 Qxd4+ 38. Kxd4 Rd8+ 39. Ke4 Rxd1 40. Rxd1 g5 41. Rd8+ Kg7 42. Rd7+ Kg6 43. Rxb7 Qe2+ 44. Kd4 Qe5+ 45. Kc4 Qe2+ 46. Kd4 Qxf3 47. Rb5 Qe3+ 48. Kc4 h5 49. Rd5 Qe6 50. Kc5 h4 51. Rd1 h3 52. Rh1 h2 53. Kd4 Qe3+ 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "2"]
[White "Tymchyshyn, Volodymyr"]
[Black "Melnychuk, Yuriy"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "1267"]
[BlackElo "1385"]
[Annotator "NA RC COMBH"]
[PlyCount "171"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. dxe5 dxe5 6. Bc4 Be7 7. Ng5 O-O 8. Bxf7+ Rxf7 9. Ne6 Qe8 10. Nxc7 Qd8 11. Nxa8 b5 12. Qd3 Bb7 13. Qxb5 Qxa8 14. f3 a5 15. Be3 Qa6 16. Qxa6 Bxa6 17. O-O-O Rf8 18. Nd5 Bd8 19. Nxf6+ Nxf6 20. Rd6 Bb5 21. Rhd1 Bc7 22. R6d2 Kf7 23. b3 Rc8 24. c4 Be8 25. Rc2 h6 26. Kb2 Ke6 27. c5 Bc6 28. a4 Rb8 29. Ka3 Nd7 30. Rc4 Nf6 31. b4 axb4+ 32. Rxb4 Ra8 33. Rd3 Ne8 34. Rd1 Ba5 35. Rc4 Bd8 36. Rb1 Bc7 37. Rd1 g5 38. g3 Nf6 39. h3 Nh5 40. Bf2 Nf6 41. g4 Bb5 42. Rb4 Bc6 43. Rc4 Ra5 44. Kb3 Ra8 45. Rd2 Rb8+ 46. Ka3 Ne8 47. h4 Ba5 48. Rb2 Rd8 49. Rb3 Rd2 50. Be1 Bxa4 51. Kxa4 Ra2+ 52. Ra3 Rxa3+ 53. Kxa3 Bxe1 54. hxg5 hxg5 55. c6 Nc7 56. Kb3 Bd2 57. Kc2 Bf4 58. Kd3 Kd6 59. Rc2 Na6 60. Ke2 Nc5 61. c7 Kxc7 62. Rxc5+ Kd6 63. Rc8 Ke6 64. Rf8 Ke7 65. Rxf4 gxf4 66. Kf2 Kf7 67. Kg2 Kg6 68. Kh2 Kh6 69. Kh3 Kg5 70. Kg2 Kg6 71. Kh2 Kh6 72. Kh3 Kg5 73. Kg2 Kg6 74. Kf2 Kf6 75. Ke2 Kg5 76. Kd3 Kh4 77. Kc4 Kg3 78. g5 Kxf3 79. Kd3 Kg2 80. g6 f3 81. g7 f2 82. g8=Q+ Kf3 83. Qf7+ Kg2 84. Qg6+ Kf3 85. Qf5+ Kg2 86. Ke2 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "2"]
[White "Korchevskyi, Volodymyr"]
[Black "Pupko, Maksym"]
[Result "1-0"]
[ECO "C45"]
[WhiteElo "1244"]
[BlackElo "1301"]
[Annotator "NA RC COMBH"]
[PlyCount "73"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bb4+ 5. c3 Nxd4 6. Qxd4 Bf8 7. Bc4 c5 8. Qd5 Qf6 9. Bg5 Qe6 10. Qd3 Qg4 11. f4 Qxg2 12. Rf1 f6 13. Qd5 Ne7 14. Qf7+ Kd8 15. Bh4 Qxb2 16. e5 Qxa1 17. Bd3 fxe5 18. fxe5 Qb2 19. Qxf8+ Rxf8 20. Rxf8+ Kc7 21. Bxe7 Qxh2 22. Bd6+ Kc6 23. Be4+ Kb6 24. Nd2 Qg3+ 25. Kd1 Qxc3 26. Rf3 Qa1+ 27. Bb1 Qd4 28. Rb3+ Ka5 29. Ra3+ Kb6 30. Rb3+ Ka5 31. Bd3 Qa4 32. Nc4+ Qxc4 33. Bxc4 b6 34. Bd5 Ka4 35. Bxa8 b5 36. Bxc5 g5 37. Ra3# 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "3"]
[White "Kutyra, Myroslav"]
[Black "Katsan, Danylo"]
[Result "0-1"]
[ECO "E61"]
[WhiteElo "1764"]
[BlackElo "1447"]
[Annotator "NA RC COMBH"]
[PlyCount "77"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 d6 5. Bg5 O-O 6. Qd2 Re8 7. e4 Nc6 8. Rd1 e5 9. d5 Nb8 10. h4 Bg4 11. Be2 Qd7 12. Bh6 Bh8 13. Nh2 Bxe2 14. Qxe2 Na6 15. g4 Nc5 16. h5 c6 17. b4 Na6 18. a3 cxd5 19. cxd5 Rac8 20. Bd2 Nc7 21. Rg1 Na8 22. Nf1 Nb6 23. Ne3 Bg7 24. f3 Kh8 25. hxg6 fxg6 26. Rh1 Re7 27. Ng2 Nc4 28. Nh4 Kg8 29. Nb1 Rf7 30. Bg5 Nb6 31. Ng2 Qa4 32. Ne3 Qd7 33. Nd2 Ne8 34. Qh2 Bh8 35. Kf2 Rc3 36. Nb1 Rc8 37. Rc1 Nc7 38. Rhg1 Nb5 39. Nf5 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "3"]
[White "Tsertsvadze, Anatoliy"]
[Black "Tymchyshyn, Volodymyr"]
[Result "0-1"]
[ECO "D03"]
[WhiteElo "1733"]
[BlackElo "1267"]
[Annotator "NA RC COMBH"]
[PlyCount "104"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. Nf3 e6 3. Bg5 Be7 4. e3 d5 5. Bd3 h6 6. Bh4 Nbd7 7. Nbd2 c5 8. c3 b6 9. O-O Bb7 10. Rc1 Rc8 11. Bb1 Nh5 12. Bxe7 Qxe7 13. Ne5 Nxe5 14. Qxh5 Nd7 15. f4 Nf6 16. Qh4 Ne4 17. Qxe7+ Kxe7 18. Nxe4 dxe4 19. f5 exf5 20. Rxf5 f6 21. Rcf1 Rhf8 22. dxc5 Rxc5 23. Rxc5 bxc5 24. Rd1 Ke6 25. b4 cxb4 26. cxb4 Bd5 27. a3 Rc8 28. Kf2 Rc3 29. a4 Rb3 30. b5 Ra3 31. Rd4 Ra1 32. Bxe4 Bxe4 33. Rxe4+ Kd5 34. Rd4+ Ke6 35. Kf3 Rf1+ 36. Ke2 Ra1 37. h4 Ra2+ 38. Kf3 h5 39. g3 g5 40. hxg5 fxg5 41. Rc4 Kd5 42. Rd4+ Ke5 43. Rc4 g4+ 44. Rxg4 hxg4+ 45. Kxg4 Rxa4+ 46. Kh5 Kf5 47. Kh6 Rg4 48. Kh5 Rxg3 49. e4+ Kxe4 50. Kh4 Rg8 51. Kh5 Kd5 52. Kh6 Kc5 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "3"]
[White "Karpinets, Andrian"]
[Black "Kikh, Andriy"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "1370"]
[BlackElo "1746"]
[Annotator "NA RC COMBH"]
[PlyCount "91"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 e6 2. d4 c5 3. Nf3 cxd4 4. Nxd4 d5 5. Bb5+ Bd7 6. exd5 e5 7. Bxd7+ Nxd7 8. Nb5 a6 9. N5c3 Bc5 10. Nd2 h5 11. Nde4 Ne7 12. d6 Nf5 13. Bg5 f6 14. Qd5 Nd4 15. O-O-O Qb6 16. Na4 Qc6 17. Qxc6 bxc6 18. Naxc5 fxg5 19. Rhe1 O-O-O 20. c3 Nf5 21. Nxd7 Rxd7 22. Nxg5 Re8 23. f4 Rxd6 24. Rxd6 Nxd6 25. Rxe5 Rxe5 26. fxe5 Nc4 27. e6 Kd8 28. b3 Ne3 29. Kd2 Nxg2 30. Kd3 Ke7 31. Ne4 Kxe6 32. Nc5+ Kd5 33. Nxa6 Nf4+ 34. Ke3 Ne6 35. c4+ Kd6 36. Nb4 g5 37. Nd3 g4 38. Nf4 Ng7 39. Ke4 h4 40. b4 Ne8 41. a4 Nf6+ 42. Kf5 g3 43. hxg3 h3 44. Nxh3 Nd7 45. Nf4 Ne5 46. c5+ 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "3"]
[White "Stoyanovskyi, Nazar"]
[Black "Korchevskyi, Volodymyr"]
[Result "1/2-1/2"]
[ECO "B45"]
[WhiteElo "1302"]
[BlackElo "1244"]
[Annotator "NA RC COMBH"]
[PlyCount "83"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 Be7 7. Nxc6 bxc6 8. e5 Nd5 9. Nxd5 cxd5 10. Bxe7 Qxe7 11. c3 O-O 12. Bd3 d6 13. exd6 Qxd6 14. O-O Bb7 15. c4 Qc6 16. Qf3 dxc4 17. Qxc6 Bxc6 18. Bxc4 Rab8 19. b3 Rfd8 20. Rad1 Kf8 21. f3 Ke7 22. Kf2 a5 23. Rxd8 Rxd8 24. Ke2 a4 25. Rd1 Rxd1 26. Kxd1 axb3 27. axb3 Kd6 28. Kd2 Kc5 29. Kc3 Bb5 30. b4+ Kc6 31. Bxb5+ Kxb5 32. g3 e5 33. f4 e4 34. f5 e3 35. Kd3 Kxb4 36. Kxe3 Kc5 37. Ke4 Kd6 38. g4 f6 39. h4 h6 40. Kd4 Kc6 41. Kc4 Kd6 42. Kd4 1/2-1/2

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "3"]
[White "Tyurin, Rostyslav"]
[Black "Soroka, Denys"]
[Result "0-1"]
[ECO "C50"]
[WhiteElo "1262"]
[BlackElo "1624"]
[Annotator "NA RC COMBH"]
[PlyCount "138"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nb8 4. Nb1 Nc6 5. Nc3 Bc5 6. Bc4 Nf6 7. d3 h6 8. h3 O-O 9. O-O d6 10. Be3 Bb6 11. Bxb6 axb6 12. Nh2 Nd4 13. Ne2 Ne6 14. f4 exf4 15. Nxf4 Nxf4 16. Rxf4 c6 17. a3 d5 18. exd5 Nxd5 19. Bxd5 Qxd5 20. Qd2 Re8 21. Raf1 Re7 22. Ng4 Bxg4 23. Rxg4 Qd6 24. Qf2 b5 25. Kh1 Rae8 26. Qf3 Qc7 27. Qf6 g6 28. Rgf4 Re1 29. Kg1 Rxf1+ 30. Rxf1 Re6 31. Qf3 Qe7 32. Rf2 Re1+ 33. Kh2 Qe5+ 34. g3 Qe6 35. c3 Re3 36. Qf4 g5 37. Qd4 Qe5 38. Qxe5 Rxe5 39. d4 Re3 40. Kg2 Kg7 41. Rf3 Re2+ 42. Rf2 Re1 43. g4 Kg6 44. Kf3 Rh1 45. Kg2 Rd1 46. Kf3 Rd3+ 47. Kg2 b6 48. Rf5 Rd2+ 49. Rf2 Rxf2+ 50. Kxf2 f5 51. b3 Kf6 52. Kf3 f4 53. Ke4 Ke6 54. c4 bxc4 55. bxc4 Kd6 56. a4 Kc7 57. h4 Kd6 58. hxg5 hxg5 59. Kf3 Kc7 60. Ke4 Kb7 61. Kf3 Ka6 62. Ke4 b5 63. axb5+ cxb5 64. cxb5+ Kxb5 65. d5 Kb6 66. d6 Kc6 67. Ke5 Kd7 68. Ke4 Kxd6 69. Kf3 Ke5 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "3"]
[White "Hychkevych, Vitaliy"]
[Black "Volkov, Roman K"]
[Result "1-0"]
[ECO "A85"]
[WhiteElo "1251"]
[BlackElo "1777"]
[Annotator "NA RC COMBH"]
[PlyCount "69"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 f5 2. c4 Nf6 3. Nc3 e6 4. Bg5 Be7 5. Nf3 O-O 6. e3 h6 7. Bh4 d5 8. cxd5 Nxd5 9. Bxe7 Nxe7 10. Bc4 c6 11. O-O b5 12. Bb3 Nd5 13. Bxd5 exd5 14. Ne5 Qf6 15. Rc1 Nd7 16. Nd3 Bb7 17. Qb3 a5 18. a3 a4 19. Qc2 Nb6 20. Nc5 Rf7 21. Nb1 Rc8 22. Nd2 Nc4 23. Nxc4 dxc4 24. Rfd1 Rd8 25. f3 f4 26. exf4 Rxd4 27. Qf2 Rxd1+ 28. Rxd1 Qxf4 29. Rd8+ Kh7 30. Qc2+ g6 31. Qc3 g5 32. Qh8+ Kg6 33. Rg8+ Kh5 34. g4+ Kh4 35. Qxh6# 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "4"]
[White "Koptsiukh, Vladimir"]
[Black "Melnychuk, Yuriy"]
[Result "0-1"]
[ECO "C41"]
[WhiteElo "2021"]
[BlackElo "1385"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 9,73,0,0,-33,-9,-28,-33,-67,-54,-119,-104,-135,-95,-144,-79,-127,-111,-186,-206,-201,-198,-186,-179,-210,-193,-193,-161,-189,-169,-210,-88,-404,-395,-416,-277,-458,-370,-450,-200,-204,-100,-489,-265,-833,-803,-1435,-1429,-1385,-1400,-6014,-788,-867,-874,-1171,-753,-1287,-745,-739,-695,-1069,-1067,-978,-961,-4998,-310,-295]} 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. dxe5 dxe5 6. Bg5 {C41: Philidor Defence.} Be7 7. Qd2 c6 8. O-O-O {Black is slightly better.} Qc7 9. h4 (9. Nh4 $1 $15) 9... b5 10. Bd3 {[#]} Nc5 $146 ({Predecessor:} 10... Bb4 11. a3 Ba5 12. Kb1 Rb8 13. b4 Bb6 14. h5 h6 15. Bh4 a5 16. Kb2 Ra8 {1-0 Shahaliyev,I (2413)-Tomb,M (2084) Titled Tuesday intern op 23rd Mar blitz 2021 (8)}) 11. Be3 (11. Ne2 $142) 11... Nxd3+ (11... O-O $142 12. Bg5 h6 13. Bxf6 Bxf6) 12. Qxd3 (12. cxd3 $142 Bg4 13. Kb1) 12... Be6 13. Ng5 (13. Bg5 $17 {might work better.}) 13... Bc4 $1 $19 14. Qd2 Rd8 15. Qe1 Rxd1+ 16. Qxd1 b4 17. Nb1 (17. b3 $2 bxc3 18. Qe1 Qa5 19. bxc4 h6 $19) 17... h6 ({Not} 17... Bxa2 18. Nd2 $17) 18. b3 Bb5 19. Nh3 {[#]} O-O ({Inferior is} 19... Nxe4 20. Qg4 Nf6 21. Qxg7 $11) (19... c5 $1 $19 {has better winning chances. White must now prevent ...0-0.} 20. Nd2 O-O) 20. Qf3 $2 {[%mdl 8192]} (20. g4 $17 {was the crucial defense.}) 20... c5 {Strongly threatening ...c4.} 21. g4 Bc6 22. Nd2 (22. Qe2 {was worth a try.} Nxe4 {[%mdl 64] Discovered Attack} 23. Rg1) 22... Qb7 {[%cal Rf6e4]} 23. Qg3 Bxe4 (23... Nxe4 $142 24. Nxe4 Bxe4) 24. f3 {[#]} Bh7 {This pair of bishops is nice.} (24... Bg6 $1 $19 {is more deadly.} 25. h5 Bh7) 25. Qxe5 {[%mdl 8192]} (25. g5 $17 {is tougher.} Nd5 26. gxh6) 25... Nd5 (25... Nxg4 $142 26. Qf4 Qa6) 26. Nc4 (26. g5 Qd7 27. Nf4 Nxe3 {[%mdl 64] Deflection} 28. Qxe3 hxg5 29. Nd5) 26... Bf6 (26... Bxh4 $2 {too greedy.} 27. Bxc5 Bf6 28. Qh2 $19) 27. Qg3 Nxe3 28. Nxe3 Qa6 {[%cal Of8d8]} 29. Nd5 Bc3 (29... Qxa2 $142 30. Rh2 Rd8) 30. Nxc3 bxc3 31. a4 Qe2 {[%csl Gh7][%cal Re2c2]} 32. Qh2 Re8 {[%cal Oe2e1]} 33. Qxe2 Rxe2 {[%cal Be8e2,Be2c2,Bc2b2][%mdl 32]} 34. Nf4 Rxc2+ 35. Kd1 Rb2 {( -> ...Rb1+)} 36. Re1 c2+ $2 (36... Rxb3 $2 37. Re8#) (36... Rb1+ 37. Ke2 c2) 37. Kd2 {Weighted Error Value: White=1.78/Black=1.09} 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "4"]
[White "Makhnivchyk, Andriy"]
[Black "Kozak, Dmytro"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1712"]
[BlackElo "1937"]
[Annotator "TA"]
[PlyCount "166"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 10,166,54,44,106,107,106,109,142,94,118,59,59,52,75,64,74,52,62,77,87,5,6,6,10,13,37,0,7,5,0,0,0,18,56,0,39,0,0,0,0,0,35,0,0,-76,91,102,253,228,211,-212,-168,-187,-67,-56,-29,-243,-233,-224,-187,-267,-187,-592,-698,-640,-677,-679,-667,-12836,-12836,-12835,-255,-483,-240,-691,-172,-172,-172,-172,-172,-172,-172,-172,-172,-172,-155,-172,-172,-165,-165,-165,-165,-165,-165,-165,-165,-165,-165,-165,-165,-12841,-12842,-12842,-165,-12849,-12849,-12850,-12850,-12850,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999,-27999]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nxd4 5. Qxd4 Qf6 6. Be3 Be7 {C45: Scotch Game.} ({Black should try} 6... Qxd4 $14 7. Bxd4 Ne7) 7. Nc3 $16 {Black must now prevent Nd5.} Qxd4 8. Bxd4 {[%cal Oc3d5] Nd5! is the strong threat.} Nf6 {White is better.} 9. O-O-O (9. e5 $142 Ng4 10. h3) 9... d6 {[#]} 10. f3 $146 ({Better is} 10. Nb5 $16 Bd8 11. e5 (11. Bxa7 b6 $15) 11... dxe5 12. Bxe5) ({Predecessor:} 10. h3 Bd7 11. e5 dxe5 12. Bxe5 O-O-O 13. Bb5 Bxb5 14. Nxb5 Rd5 15. Rxd5 Nxd5 16. Rd1 c6 17. Nd6+ Bxd6 18. Bxd6 Rd8 19. Bg3 Nb4 20. Rxd8+ Kxd8 21. a3 Nd5 {½-½ Lombardi,D (820)-Torfs,G (855) RN-2012-0-00466}) 10... a6 11. g4 O-O 12. h4 b5 13. h5 c5 14. Be3 b4 15. Nd5 (15. Ne2 $16) 15... Nxd5 $11 16. Rxd5 Be6 17. Rd2 a5 18. Kb1 a4 19. g5 b3 20. cxb3 axb3 21. a3 Rfd8 22. f4 ({White should play} 22. Bb5 $1 $14) 22... f5 23. gxf6 Bxf6 24. f5 Bf7 25. h6 g6 26. fxg6 Bxg6 27. Bc4+ (27. Rg1 $11) 27... Kf8 $2 (27... d5 $1 $17 {keeps the pressure on.} 28. Rf1 dxc4 29. Rxf6 Re8) 28. Rf1 $16 (28. Bxb3 $2 Bxe4+ 29. Bc2 Bxh1 $19) 28... Bxe4+ $2 (28... Ke7 $16) 29. Kc1 $18 Ke7 30. Bd5 $4 {[%mdl 8192]} (30. Rdf2 $18 d5 31. Bxc5+ (31. Bxb3 Bd4 $11) 31... Ke6 32. Rxf6+ Ke5 33. Ba6 (33. Bxb3 Rdc8 $11)) 30... Bxd5 $19 31. Rxd5 Rg8 (31... Be5 $19 {Threatens to win with ...Kd7.} 32. Rxe5+ dxe5 33. Bg5+ Ke6 34. Bxd8 Rxd8) 32. Re1 $1 $15 ({Much worse is} 32. Bf4 Rg2 33. Re1+ (33. Bxd6+ $2 {is the wrong capture.} Ke6 $19) 33... Kf7 $17) 32... Kd7 33. Bf4 $2 {Black keeps a firm grip on the game.} (33. Red1 $11 {and White has nothing to worry.}) 33... Ra6 $19 34. Rf5 Rg6 {aiming for ...Ra4.} 35. Rd1 (35. Kb1 {keeps fighting.}) 35... c4 36. Rc5 $2 (36. Bd2 {is more resistant.}) 36... Rg2 37. Rxc4 Bxb2+ 38. Kb1 Bxa3 ({Worse is} 38... Rxa3 39. Rxd6+ Ke8 40. Rc8+ Kf7 41. Rc7+ Ke8 42. Rc8+ Kf7 43. Rc7+ Ke8 44. Rc8+ $11) 39. Rcd4 Rb2+ 40. Ka1 Ra2+ (40... Rf2 $142 41. Kb1 b2 42. Bxd6 Rxd6) 41. Kb1 Bc5 (41... Rc2 $142 {Hoping for ...Rb2+.} 42. R4d2 Ra4) 42. R4d2 (42. R4d3) 42... R2a4 $2 (42... Bb4 {( -> ...Bc3)} 43. Rd3 Bc3 44. Rxc3 Ra1+ {[%mdl 64] Skewer} 45. Kb2 Rxd1 46. Rxb3 Ke6) 43. Be5 Rh4 44. Bg7 Rh3 45. Rd3 Rxd3 46. Rxd3 {[%mdl 4096] Endgame KRB-KRB} Rb6 $1 47. Kb2 Kc6 48. Rxb3 {[#]} Kd5 $1 49. Rxb6 Bxb6 {KB-KB} 50. Kc3 {[#]} Ke4 51. Kd2 Bd4 52. Bf8 d5 53. Ke2 Be5 54. Kd1 Kd3 55. Bc5 $2 (55. Bg7 Bg3 56. Bf6) 55... Bf4 56. Bf8 Ke4 $2 (56... Ke3 57. Bg7 Kd3) 57. Bg7 $2 (57. Kc2) 57... Kf5 58. Ke2 Kg6 59. Kd3 Bxh6 60. Be5 {Black mates.} Bg7 61. Bg3 Kf5 62. Ke3 Kg4 63. Kf2 Bd4+ 64. Kg2 h5 {[%cal Bh7h5,Bh5h4,Bh4h3][%mdl 32]} 65. Bd6 Be3 66. Be5 h4 67. Bg7 h3+ 68. Kh2 Bf4+ 69. Kh1 Kf3 70. Bc3 Ke4 71. Bb2 Be5 72. Bc1 d4 {[%cal Bd5d4,Bd4d3][%mdl 32]} 73. Bd2 Kf3 74. Bb4 d3 75. Bd2 Ke2 76. Bb4 Bf4 77. Bc3 Bd2 78. Be5 Be3 79. Bc3 Bd4 {[%mdl 64] Deflection, Promotion} 80. Bb4 Kd1 81. Kh2 Kc2 82. Be1 Bc3 83. Bf2 d2 {Weighted Error Value: White=0.84/Black=0.66} 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "4"]
[White "Soroka, Denys"]
[Black "Tymchyshyn, Volodymyr"]
[Result "1-0"]
[ECO "E91"]
[WhiteElo "1624"]
[BlackElo "1267"]
[Annotator "NA RC COMBH"]
[PlyCount "69"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3 axb5 6. Bxb5 Ba6 7. Bxa6 Nxa6 8. Nc3 d6 9. Nf3 g6 10. O-O Bg7 11. e4 O-O 12. Re1 Qd7 13. e5 dxe5 14. Nxe5 Qc7 15. Bf4 Nh5 16. Nxg6 Nxf4 17. Nxf8 Kxf8 18. Qf3 Rb8 19. Rab1 Nb4 20. g3 Nfd3 21. Red1 Ne5 22. Qf5 Ng6 23. a3 Nc2 24. Qxc2 Qe5 25. Re1 Qh5 26. Qe2 Qxe2 27. Nxe2 Rxb2 28. Rxb2 Bxb2 29. a4 Ne5 30. Rb1 Ba3 31. a5 Nf3+ 32. Kg2 Nd2 33. Rb8+ Kg7 34. a6 c4 35. a7 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "4"]
[White "Kutsyk, Roman"]
[Black "Stoyanovskyi, Nazar"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1456"]
[BlackElo "1302"]
[Annotator "NA RC COMBH"]
[PlyCount "75"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 d5 2. Bf4 Nc6 3. e3 a6 4. Nd2 Nf6 5. c3 Bf5 6. Qb3 Na5 7. Qa4+ c6 8. b4 b5 9. Qxa5 Qxa5 10. bxa5 e6 11. a3 c5 12. Nb3 c4 13. Nd2 h6 14. Ngf3 Be4 15. h4 Bxf3 16. gxf3 Rg8 17. Rg1 Be7 18. e4 Kd7 19. Bh3 Kc6 20. Bg4 Nxg4 21. fxg4 Bxh4 22. g5 hxg5 23. Bxg5 Bxg5 24. Rxg5 f6 25. Rg6 Kd6 26. Ke2 Ke7 27. Rag1 Kf7 28. f4 Rae8 29. e5 f5 30. Nf3 Re7 31. R6g3 g6 32. Ng5+ Kf8 33. Rh3 Ke8 34. Rgh1 Kd7 35. Rh7 Rb8 36. Rxe7+ Kxe7 37. Rh7+ Ke8 38. Rh8+ 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "4"]
[White "Katsan, Danylo"]
[Black "Karpinets, Andrian"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "1447"]
[BlackElo "1370"]
[Annotator "NA RC COMBH"]
[PlyCount "102"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. Nf3 d5 2. d4 Nf6 3. Bf4 e6 4. e3 Bd6 5. Ne5 c5 6. c3 Qc7 7. Nd2 Nbd7 8. Ndf3 O-O 9. Nxd7 Nxd7 10. Bg3 e5 11. dxe5 Nxe5 12. Bxe5 Bxe5 13. Qxd5 Bf6 14. Be2 Be6 15. Qh5 Qb6 16. O-O Qxb2 17. Bd3 g6 18. Qxc5 Rac8 19. Qxa7 Qxc3 20. Rad1 Qc6 21. Nd4 Bxd4 22. Qxd4 Bxa2 23. Be4 Qb5 24. Rd2 Be6 25. Rb2 Qg5 26. Rxb7 Rfd8 27. Qb2 Qh4 28. Rb4 Qg5 29. Bb7 Rb8 30. Bf3 Rbc8 31. g3 Qf5 32. Bg4 Qd5 33. Rd1 Qxd1+ 34. Bxd1 Rxd1+ 35. Kg2 Rcc1 36. Rb8+ Bc8 37. Qf6 Rc7 38. Qf4 Rdc1 39. h4 Kg7 40. Qd4+ f6 41. g4 Bb7+ 42. Kg3 Rg1+ 43. Kf4 Rgc1 44. Qd2 R7c4+ 45. Kg3 Rg1+ 46. Kh2 Rh1+ 47. Kg3 Rg1+ 48. Kh2 Rh1+ 49. Kg3 Rg1+ 50. Kh3 Rh1+ 51. Kg3 Rg1+ 1/2-1/2

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "4"]
[White "Korchevskyi, Volodymyr"]
[Black "Hychkevych, Vitaliy"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "1244"]
[BlackElo "1251"]
[Annotator "NA RC COMBH"]
[PlyCount "116"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 cxd4 5. cxd4 Nc6 6. Nf3 Nf6 7. Nc3 Qa5 8. Bb5 a6 9. Bxc6+ bxc6 10. O-O Bg4 11. Be3 e6 12. h3 Bh5 13. Rc1 Be7 14. Qe2 O-O 15. Rfd1 Rfd8 16. Bf4 Rac8 17. Qe3 c5 18. Ne4 Nd5 19. Qd2 Qxd2 20. Bxd2 cxd4 21. Ba5 Re8 22. g4 Bg6 23. Rxc8 Rxc8 24. Rxd4 Rc1+ 25. Kh2 Bxe4 26. Rxe4 Bd6+ 27. Kg2 Nf4+ 28. Kh2 Nd3+ 29. Kg2 Rd1 30. Bd2 Bc5 31. Be3 Bxe3 32. Rxe3 Nf4+ 33. Kg3 Nd5 34. Ra3 f6 35. Rxa6 e5 36. Nh4 g6 37. Ra8+ Kg7 38. a4 Rd3+ 39. Kh2 Nf4 40. Ng2 Nxh3 41. b4 Nxf2 42. Ne1 Nxg4+ 43. Kg2 Rb3 44. b5 Ne3+ 45. Kf2 Nd5 46. Ra7+ Kh6 47. Rd7 Nb6 48. Ra7 Nc4 49. Rc7 Rb4 50. Ra7 e4 51. Kg3 Kg5 52. Ng2 Rb3+ 53. Kf2 h5 54. Rc7 Nb6 55. Rc5+ f5 56. a5 Na4 57. Rc4 Nb2 58. Rc5 Nd3+ 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "5"]
[White "Kozak, Dmytro"]
[Black "Melnychuk, Yuriy"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "1937"]
[BlackElo "1385"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 11,97,16,5,1,27,35,25,18,41,15,150,153,139,43,76,60,57,42,79,93,185,0,0,0,49,-6,66,32,41,11,31,22,15,11,18,21,70,-124,-29,-16,-20,-110,-106,-105,-112,-221,-129,-186,-167,-168,-166,-202,-62,-427,-427,-427,-427,-387,-269,-272,-230,-439,-421,-421,-5,-5,-4,-4,-5,-6,0,0,709,0,0,0,0,0,0,-4,0,-6,0,0,67,-9,29984,29985]} 1. e4 d6 2. d4 Nf6 3. Bd3 e5 4. c3 g6 5. Ne2 Bg7 6. O-O O-O 7. h3 {[#] B06: Modern Defence.} exd4 $146 ({Predecessor:} 7... d5 8. exd5 exd4 9. c4 c6 10. Nxd4 cxd5 11. Nc3 Nc6 12. Nxc6 bxc6 13. cxd5 Nxd5 14. Na4 Rb8 {1-0 Nepomniachtchi,I (2720)-Karjakin,S (2760) Wch Blitz 5th 2010 (4)}) 8. cxd4 c5 9. Bg5 {Black must now prevent e5. White has an edge.} Qb6 10. Nd2 Nc6 (10... cxd4 $11 {remains equal.} 11. Nc4 Qa6) 11. Nc4 $1 $16 {[%csl LRb6,LRd6]} Qc7 12. d5 (12. Bf4 $1 $16 {[%cal Rf4d6]}) 12... Nb4 13. Bf4 Ne8 14. Nc3 Nxd3 15. Qxd3 a6 (15... Qd7 $16) 16. Rfe1 $2 (16. Qg3 $18) 16... b5 $11 17. Nd2 c4 (17... Bb7 $11) 18. Qc2 ({White should try} 18. Qe3 $1 $14) 18... Qc5 ({Better is} 18... f5 $11) 19. Nf3 Nf6 20. Rad1 Bb7 21. a3 (21. Be3 $5 {[%cal Re3c5]} Qc7 22. Bd4 $11) 21... Rfe8 22. Be3 Qc7 23. Bd4 Rad8 (23... Nd7 $11) 24. e5 $2 {White is more active.} (24. b3 $14 {keeps the upper hand.}) 24... dxe5 (24... Nxd5 $17 {[%cal Rd6e5]} 25. Nxd5 Bxd5 26. exd6 Rxe1+ 27. Nxe1 Rxd6 28. Bxg7 Kxg7 29. Qc3+ f6) 25. Bxe5 Qc8 {[%cal Rf6d5]} 26. Bxf6 (26. Qd2 $1 $11) 26... Rxe1+ $1 $17 (26... Bxf6 $6 27. Rxe8+ Rxe8 28. Ne4 $11) 27. Nxe1 Bxf6 28. d6 (28. Qd2 $17 {keeps fighting.}) 28... Qc6 (28... Be5 $19 29. a4 Qc6) 29. Qd2 (29. Nd5 $17 Qxd6 30. Nxf6+ Qxf6 31. Qc3) 29... Rd7 30. Qf4 Kg7 31. Qg3 a5 (31... Qc5 $19 {...Bd4 would be deadly.} 32. Qe3 Qxe3 33. fxe3 Be5) 32. Nf3 $2 {[%mdl 8192]} (32. Nc2 $1 $15) 32... b4 $19 33. axb4 axb4 {[%cal Ba5b4,Bb4c3,Bc3c2][%mdl 32]} 34. Ne2 c3 (34... Bxb2 $2 {perishes.} 35. Ne5 Bxe5 36. Qxe5+ f6 37. Qg3) 35. bxc3 bxc3 36. Nfd4 (36. Ne1 {might work better.}) 36... c2 (36... Qxd6 $2 37. Nf5+ (37. Qxc3 Qd5 $17) 37... Kg8 38. Rxd6 $18) 37. Rc1 Bxd4 (37... Qxd6 $2 38. Nf5+ (38. Nxc2 $2 Qd2 $19) 38... Kg8 39. Nxd6 $18) (37... Qe4 $19 38. Qg4 Rxd6 39. Nxc2 Rd2 40. Qxe4 Bxe4) 38. Nxd4 $11 Qd5 (38... Qxd6 $2 39. Nf5+ (39. Nxc2 $2 {too greedy.} Qxg3 40. fxg3 Rc7 $19) 39... Kg8 40. Nxd6 $18) 39. Nxc2 {aiming for Ne3.} Qxd6 40. Qc3+ (40. Qxd6 {simplifies} Rxd6 41. Ne3 h5 42. Rc4) 40... Kg8 (40... Qf6 {simplifies} 41. Qxf6+ Kxf6 42. Ne3 h5) 41. Ne3 {Ng4 is the strong threat.} Qe6 {[%mdl 8192] [#]} (41... h5 $11) 42. Qb2 $2 ({White must play} 42. Ng4 $1 $18 Kf8 43. Re1) 42... h5 43. Rc5 Qe4 {[%cal Od7d1] ( -> ...Rd1+!)} 44. Rc1 {Prevents Rd1+.} Re7 45. Qd2 Kh7 46. Qd8 Qe6 47. Qd4 Qe5 (47... Rd7 $11 48. Qc5 Qe7) 48. Qh4 {[#]} (48. Qxe5 $14 Rxe5 49. Rc7) 48... Qb8 $2 {[%mdl 8192]} 49. Qxe7 {A wild game.   Weighted Error Value: White=0.66/Black=0.51} 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "5"]
[White "Kutyra, Myroslav"]
[Black "Gavker, Markiyan"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "1764"]
[BlackElo "1310"]
[Annotator "NA RC COMBH"]
[PlyCount "46"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. Nf3 d5 3. e3 e6 4. Bd3 Bd6 5. O-O O-O 6. Nbd2 Bd7 7. c4 c6 8. Re1 Bc7 9. e4 dxe4 10. Nxe4 Nxe4 11. Rxe4 Na6 12. Rh4 h6 13. Bxh6 gxh6 14. Qd2 Qf6 15. Rxh6 Qf4 16. Qxf4 Bxf4 17. Re1 Bxh6 18. Ne5 Rad8 19. Re4 f5 20. Rh4 Bg5 21. Rh3 Bf4 22. Ng6 Bd6 23. c5 Bc7 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "5"]
[White "Tsertsvadze, Anatoliy"]
[Black "Katsan, Danylo"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "1733"]
[BlackElo "1447"]
[Annotator "NA RC COMBH"]
[PlyCount "54"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. c3 d6 5. e3 Nh5 6. Bg5 h6 7. Bh4 g5 8. Bg3 Nxg3 9. hxg3 Nd7 10. Nbd2 c5 11. Qa4 O-O 12. Bd3 e5 13. Qb3 b6 14. Rd1 Bb7 15. g4 d5 16. Bf5 c4 17. Qc2 e4 18. Ng1 Nb8 19. f3 exf3 20. Ngxf3 Qd6 21. Nxg5 Qg3+ 22. Kf1 Qxe3 23. Bh7+ Kh8 24. Re1 Qxg5 25. Nf3 Qxg4 26. Ne5 Qf4+ 27. Kg1 Nc6 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "5"]
[White "Karpinets, Andrian"]
[Black "Soroka, Denys"]
[Result "0-1"]
[ECO "D11"]
[WhiteElo "1370"]
[BlackElo "1624"]
[Annotator "NA RC COMBH"]
[PlyCount "110"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. g3 Bf5 5. Bg2 e6 6. O-O Be7 7. Nc3 O-O 8. Nh4 Bg6 9. Nxg6 hxg6 10. b3 Nbd7 11. e4 Nxe4 12. Nxe4 dxe4 13. Bxe4 Nf6 14. Bg2 Rb8 15. Bf4 Bd6 16. Qd2 Bxf4 17. Qxf4 Qb6 18. Rad1 Rbd8 19. Rd2 Rd7 20. Rfd1 Rfd8 21. g4 Qa5 22. g5 Nh5 23. Qe3 Qf5 24. Bh3 Qf4 25. Qxf4 Nxf4 26. Bg4 Rd6 27. c5 Rd5 28. h4 e5 29. Kh2 Rxd4 30. Rxd4 Rxd4 31. Rxd4 exd4 32. Kg3 Nd3 33. a3 Nxc5 34. b4 Ne4+ 35. Kf3 Nd6 36. Ke2 b6 37. Kd3 c5 38. a4 Kf8 39. a5 Ke7 40. h5 gxh5 41. Bxh5 f6 42. f4 fxg5 43. fxg5 Ke6 44. Bg4+ Ke5 45. axb6 axb6 46. Bd7 c4+ 47. Kd2 Ne4+ 48. Kc2 d3+ 49. Kc1 Nxg5 50. Bb5 Kd4 51. Kd2 c3+ 52. Kd1 c2+ 53. Kc1 Kc3 54. Bxd3 Kxd3 55. b5 Kc4 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "5"]
[White "Tymchyshyn, Volodymyr"]
[Black "Kikh, Andriy"]
[Result "0-1"]
[ECO "B32"]
[WhiteElo "1267"]
[BlackElo "1746"]
[Annotator "NA RC COMBH"]
[PlyCount "122"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. c4 a6 7. N5a3 f5 8. exf5 Bxf5 9. Nc3 Nf6 10. Bd3 Bg4 11. f3 Be6 12. Be3 Be7 13. Bc2 O-O 14. Nd5 Bxd5 15. cxd5 Nb4 16. Bb3 a5 17. Nc2 Nxc2+ 18. Bxc2 b5 19. Qd3 g6 20. O-O Qd7 21. a4 b4 22. Bb3 Rfc8 23. Bc4 Qf5 24. Qxf5 gxf5 25. b3 Kg7 26. Rac1 f4 27. Bb6 Nd7 28. Bf2 Bd8 29. Bb5 Nf6 30. Bc6 Rab8 31. Ba7 Bb6+ 32. Bxb6 Rxb6 33. Rfd1 h5 34. Kf2 h4 35. g3 hxg3+ 36. hxg3 fxg3+ 37. Kxg3 Nh5+ 38. Kf2 Nf4 39. Ke3 Rh8 40. Rg1+ Kf6 41. Rce1 Rh2 42. Rg8 Ng2+ 43. Ke2 Nxe1+ 44. Kxe1 Rb2 45. Rf8+ Ke7 46. Re8+ Kf7 47. Ra8 Rxb3 48. Rxa5 Rxf3 49. Ra7+ Kg6 50. Be8+ Kf5 51. Bd7+ Ke4 52. a5 Rb8 53. Ba4 b3 54. a6 b2 55. Bc2+ Kxd5 56. Ke2 Rh3 57. Rb7 Rxb7 58. axb7 Rh8 59. Bf5 Rb8 60. Kd2 Rxb7 61. Bb1 Kd4 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "5"]
[White "Hychkevych, Vitaliy"]
[Black "Kutsyk, Roman"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "1251"]
[BlackElo "1456"]
[Annotator "NA RC COMBH"]
[PlyCount "104"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 d5 5. Nf3 h6 6. Bxf6 Qxf6 7. e3 Nd7 8. Be2 O-O 9. O-O dxc4 10. Bxc4 c5 11. a3 Bxc3 12. bxc3 a6 13. a4 cxd4 14. cxd4 e5 15. Bb3 e4 16. Nd2 Qg6 17. Bc2 Nf6 18. Qb1 Bf5 19. Re1 Rab8 20. f3 exf3 21. Nxf3 Bxc2 22. Qb2 Be4 23. Ne5 Qg5 24. g3 Rfc8 25. Rac1 Qh5 26. Rf1 Ng4 27. Nd7 Rc2 28. Rxc2 Bxc2 29. Qxc2 Nxe3 30. Qf2 Nxf1 31. Nxb8 Nxh2 32. Qxh2 Qd1+ 33. Kg2 Qxd4 34. Qh5 Qxa4 35. Qd5 Qc2+ 36. Kh3 Qc8+ 37. Nd7 b5 38. Qf5 Qc6 39. Kh2 Qe6 40. Qd3 b4 41. Nc5 Qb6 42. Qc4 a5 43. Qd5 Qc7 44. Qa8+ Kh7 45. Qe4+ Kg8 46. Qd5 Kh8 47. Kg2 Kg8 48. Kf3 Kh8 49. Kg2 Kg8 50. Kh2 Kh8 51. Kg2 Kg8 52. Kh2 Kh8 1/2-1/2

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "6"]
[White "Volkov, Roman K"]
[Black "Kutyra, Myroslav"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "1777"]
[BlackElo "1764"]
[Annotator "NA RC COMBH"]
[PlyCount "49"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. Nc3 d5 3. Bf4 c6 4. Nf3 Bf5 5. e3 e6 6. Bd3 Bg6 7. Ne5 Nbd7 8. Nxg6 hxg6 9. O-O Nh5 10. Bg3 Qg5 11. Qe2 Nxg3 12. fxg3 Bd6 13. Rf3 Nf6 14. e4 dxe4 15. Nxe4 Nxe4 16. Bxe4 O-O-O 17. Rxf7 e5 18. Rxg7 Qh6 19. Qg4+ Kb8 20. Rxg6 Qxh2+ 21. Kf2 Rhf8+ 22. Ke2 exd4 23. Rd1 Bc5 24. Rd3 Qg1 25. Qg5 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "6"]
[White "Kikh, Andriy"]
[Black "Hychkevych, Vitaliy"]
[Result "1/2-1/2"]
[ECO "D10"]
[WhiteElo "1746"]
[BlackElo "1251"]
[Annotator "NA RC COMBH"]
[PlyCount "134"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 c5 2. c3 cxd4 3. cxd4 d5 4. Nc3 Nc6 5. f4 Nf6 6. e3 g6 7. Nf3 Bg7 8. Be2 O-O 9. a3 a6 10. O-O Bg4 11. Ne5 Bxe2 12. Qxe2 Nxe5 13. fxe5 Nd7 14. Bd2 e6 15. Rac1 b5 16. Na2 f6 17. Bb4 Re8 18. exf6 Nxf6 19. Rc6 Qd7 20. Rfc1 Rec8 21. Qc2 Rxc6 22. Qxc6 Qxc6 23. Rxc6 Ne4 24. Rxe6 Bh6 25. Nc3 Bxe3+ 26. Kf1 Bxd4 27. Nxd5 Ng5 28. Re2 a5 29. Bc3 Rf8+ 30. Ke1 Bxc3+ 31. Nxc3 b4 32. axb4 axb4 33. Nd5 b3 34. h4 Nf7 35. Re3 Rb8 36. Ne7+ Kg7 37. Nc6 Rb6 38. Nd4 Rb4 39. Nxb3 Rxh4 40. Kd2 Nd6 41. Kd3 Nc4 42. Re2 Nd6 43. Nd4 Rg4 44. b4 Nf5 45. Ne6+ Kf6 46. Nc7 Rd4+ 47. Kc3 Rd7 48. Na6 Nd4 49. Rf2+ Kg5 50. Nc5 Nb5+ 51. Kc4 Nd6+ 52. Kd5 Rf7 53. Rxf7 Nxf7 54. Ne6+ Kf6 55. b5 Ne5 56. b6 Nd7 57. b7 Ke7 58. Nd4 Nb6+ 59. Kc6 Nd7 60. g3 h5 61. Kc7 Ke8 62. Ne6 Ke7 63. Nf4 Nc5 64. Nxg6+ Kf6 65. Nf4 Nxb7 66. Kxb7 Kg5 67. Nxh5 Kxh5 1/2-1/2

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "6"]
[White "Soroka, Denys"]
[Black "Katsan, Danylo"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "1624"]
[BlackElo "1447"]
[Annotator "NA RC COMBH"]
[PlyCount "136"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 Nc6 6. Be2 O-O 7. O-O a5 8. h3 Nd7 9. Re1 e5 10. d5 Ne7 11. Bg5 h6 12. Bh4 g5 13. Bg3 f5 14. exf5 Nxf5 15. Bh2 Nc5 16. Bd3 Qf6 17. Ne4 Nxe4 18. Bxe4 Nh4 19. Bg3 Nxf3+ 20. Bxf3 Bxh3 21. c5 Bf5 22. cxd6 cxd6 23. Rc1 Rac8 24. Qb3 g4 25. Be2 h5 26. Qxb7 h4 27. Bh2 Be4 28. Qa7 Rxc1 29. Rxc1 g3 30. fxg3 hxg3 31. Bxg3 Qg5 32. Rc3 Bxd5 33. Qe3 Qg6 34. Bc4 Qb1+ 35. Qc1 Qe4 36. Bxd5+ Qxd5 37. Qg5 Qd1+ 38. Kh2 Rf7 39. Rc8+ Kh7 40. Qh4+ Bh6 41. Rd8 Kg7 42. Re8 Kh7 43. Re7 Qf1 44. Rxf7+ Qxf7 45. Qe4+ Kg7 46. Qg4+ Kh8 47. Qc8+ Bf8 48. Qd8 Kg8 49. Bh4 Qf4+ 50. Kg1 Qc1+ 51. Kh2 Qf4+ 52. Kg1 e4 53. Be7 Qc1+ 54. Kh2 Qh6+ 55. Kg1 Qe3+ 56. Kh2 Qf4+ 57. Kg1 e3 58. Qxf8+ Qxf8 59. Bxf8 Kxf8 60. Kf1 d5 61. Ke2 d4 62. a3 a4 63. Kd3 Kf7 64. Ke2 Kf6 65. Kf3 Ke5 66. g4 Kf6 67. Kg3 Kg5 68. Kf3 Kh4 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "6"]
[White "Kutsyk, Roman"]
[Black "Korchevskyi, Volodymyr"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1456"]
[BlackElo "1244"]
[Annotator "NA RC COMBH"]
[PlyCount "34"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. Bf4 d5 3. e3 e6 4. Bd3 c5 5. c3 Nc6 6. Nf3 Qb6 7. b3 Bd7 8. Nbd2 cxd4 9. exd4 Be7 10. O-O O-O 11. Ne5 Rac8 12. Rc1 Ba3 13. Rc2 Rfd8 14. Qf3 Ne7 15. Bg5 Ng6 16. Bxf6 gxf6 17. Qxf6 Rf8 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "6"]
[White "Gavker, Markiyan"]
[Black "Kozak, Dmytro"]
[Result "0-1"]
[ECO "C58"]
[WhiteElo "1310"]
[BlackElo "1937"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 15,80,23,70,62,110,110,110,120,116,116,166,122,119,96,164,169,159,165,174,167,157,137,206,182,237,226,248,214,212,202,319,199,278,-27,-72,-56,0,-212,0,-544,-453,-377,0,-620,-54,-48,-45,-513,-516,-774,-758,-692,-335,-2174,-2058,-29995,-29996,-29996,-769,-29997,-516,-1629,-1096,-29995,-4762,-29996,-29997]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Bd3 {is now debated instead of 8.Be2.} h6 (8... Nd5 $11 9. Nf3 (9. Qh5 g6 $17) 9... Bd6) 9. Ne4 $14 {C58: Two Knights: 4 Ng5 d5 5 exd5 Na5 sidelines.} Be7 (9... Nd5 $14) 10. Nxf6+ $16 Bxf6 11. O-O {White is better.} O-O 12. Nc3 {[#]} a6 $146 (12... g6 $16 13. Be2 Bg7) ({Predecessor:} 12... c5 13. Be4 Rb8 14. Nd5 Bg5 15. d3 f5 16. Bf3 Kh7 17. Re1 Nc6 18. c3 Be6 {1-0 Abdusattorov,N (2627)-Beerdsen,T (2453) Titled Arena Apr 3rd blitz 2021}) 13. Be4 {[%cal Bd3e4,Be4c6,Bc6d5][%mdl 32]} Rb8 14. a3 Kh8 (14... Be7 $16 {was called for.}) 15. b4 $18 Nc4 16. Bxc6 Qc7 17. Bd5 Nb6 18. Bb3 Bf5 {Inhibits Ne4.} (18... e4 $16 {was worth a try.} 19. Rb1 Bb7) 19. Rb1 Rbd8 (19... e4 $142 20. Qh5 Bg6) 20. Qe2 e4 21. Bb2 Be5 22. h3 (22. Nxe4 Bxb2 23. Rxb2 Qe5) (22. Qxa6 Rxd2 23. Rbe1 Bxh2+ 24. Kh1 Qf4 $19) 22... Bf4 (22... Rfe8 $142 23. Qxa6 (23. Nxe4 Bxb2 24. d3 Bd4 $17) 23... Rxd2) 23. Rfd1 (23. Qxa6 Qc6 24. Rfd1 Qg6) 23... Qe7 (23... Qb7 $142 24. a4 Bg6) 24. Na4 $2 (24. d3 $18) 24... Nxa4 $11 25. Bxa4 Qg5 {Dodges Qh5} 26. Kf1 $2 (26. Qxa6 $2 Bxh3 27. Qf1 Bg4 $19) (26. Kh1 $1 $11) 26... Qh4 $2 ({Black should try} 26... Rd6 $19 {White must now prevent ...Rg6.} 27. d3 Rg6) 27. g3 $2 {[%mdl 8192]} (27. d3 $11 {and White is okay.}) 27... Qxh3+ $19 ({Inferior is} 27... Bxh3+ 28. Ke1 (28. Kg1 $2 Bxg3 29. Bxg7+ Kxg7 $19) 28... Qg5 29. d3 $17 (29. gxf4 $2 Qg1+)) 28. Kg1 {[#]} Bg4 $2 (28... Rd6 $1 $19 {[%cal Oe4e3] Strongly threatening ...e3!} 29. Qf1 Qh5) 29. Qf1 $2 {[%mdl 8192] [#]} (29. Qxe4 $11 Qh5 30. Qxf4 Bxd1 31. d3) 29... Qxf1+ $2 (29... Qh5 $1 $19 {[%cal Og4f3] And now ...Bf3! would win.} 30. Qg2 (30. gxf4 $2 {loses.} Bf3 $19) 30... Bf3) 30. Rxf1 $15 Bxd2 31. Kg2 $2 {[%mdl 8192] Loses the game.} (31. c4 $15) 31... Bf3+ $19 32. Kh2 Rd5 33. g4 {Prevents Rh5+.} Bxg4 (33... Bf4+ $142 34. Kh3 f5) 34. Kg3 $2 (34. Bc1 Bf3 35. Bxd2 Rxd2 36. c4) 34... Bf3 35. Rg1 Rg5+ 36. Kh4 Rh5+ 37. Kg3 Rf5 (37... f5 $142 38. Bxg7+ Kxg7 39. Rgf1 f4#) 38. Kh4 (38. Kh3 $142 Rh5+ 39. Kg3 f5 40. Bxg7+ Kxg7 41. Rgf1 f4#) 38... f6 {[%cal Bf7f6,Bf6f5][%mdl 32] ( -> ...Rh5+)} 39. Bd7 Rh5+ 40. Kg3 f5 {Weighted Error Value: White=1.60/Black=1.09} 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "6"]
[White "Tymchyshyn, Iryna"]
[Black "Karpinets, Andrian"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "1167"]
[BlackElo "1370"]
[Annotator "NA RC COMBH"]
[PlyCount "82"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c5 2. Nc3 Nc6 3. d3 e6 4. Be3 d5 5. exd5 exd5 6. d4 cxd4 7. Bxd4 Be6 8. Nge2 Nf6 9. g3 Be7 10. Bg2 O-O 11. Bxf6 Bxf6 12. Bxd5 Bxd5 13. Qxd5 Bxc3+ 14. Nxc3 Re8+ 15. Kf1 Qf6 16. Kg2 Rad8 17. Qc4 Ne5 18. Qf4 Qc6+ 19. Qe4 Qb6 20. Rad1 Nc4 21. Qxc4 Rc8 22. Qb3 Qc6+ 23. Qd5 Qb6 24. Rhe1 Red8 25. Qb3 Qc6+ 26. Kg1 Rf8 27. Re3 h5 28. Rde1 h4 29. Qb5 Qh6 30. Qxb7 hxg3 31. Rxg3 g6 32. Qf3 Kg7 33. Ne4 Rh8 34. h3 Rc6 35. c3 Re6 36. Re3 Rb6 37. b3 Qh4 38. Qg4 Qd8 39. h4 Rxh4 40. Qg5 Qd1+ 41. Kg2 Qh1# 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "7"]
[White "Kozak, Dmytro"]
[Black "Kikh, Andriy"]
[Result "1/2-1/2"]
[ECO "B24"]
[WhiteElo "1937"]
[BlackElo "1746"]
[Annotator "TA"]
[PlyCount "40"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 9,40,18,28,34,35,29,30,22,31,25,27,23,54,0,41,-15,0,0,0,-10,45,-15,-7,-8,-7,0,12,8,37,41,66,0,0]} 1. e4 c5 2. Nc3 e5 3. g3 Nc6 4. Bg2 d6 5. Nge2 f5 6. d3 {B24: Closed Sicilian: 3 g3 sidelines.} Nf6 7. O-O Be7 8. h3 {White has an edge.} O-O 9. f4 {Threatens to win with fxe5.} fxe4 {[#]} 10. Nxe4 $146 ({Predecessor:} 10. dxe4 exf4 11. Bxf4 Nh5 12. Qd5+ Kh8 13. Qxh5 Bd7 14. Rad1 Be8 15. Qd5 Bf7 16. Qd2 {1-0 Djordjevic,D (2144)-Osmonbekov,T (2136) Titled Tuesday intern op 17th Aug blitz 2021 (10)}) 10... Nd4 11. g4 ({Better is} 11. c3 $14 Ne6 12. Nxf6+ Bxf6 13. Kh2) 11... Bd7 12. Kh1 (12. Nxf6+ $14 Bxf6 13. Nxd4 (13. Bxb7 Rb8 $14) 13... cxd4 14. Bxb7) 12... Bc6 13. c3 Nxe2 14. Qxe2 Qc7 (14... Nxe4 $11 15. Bxe4 Qd7) 15. fxe5 (15. Ng5 $14) 15... dxe5 $11 16. Nxf6+ Rxf6 17. Be3 Raf8 {[%cal Ba8f8,Bf8f6,Bf6d6][%mdl 32]} 18. Rxf6 Bxg2+ 19. Qxg2 Rxf6 20. Bg5 ({White should play} 20. Qd5+ $14 Kh8 21. Kg2) 20... Rd6 {Weighted Error Value: White=0.23 (precise) /Black=0.18 (very precise)} 1/2-1/2

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "7"]
[White "Tsertsvadze, Anatoliy"]
[Black "Tsikh, Vladyslav"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "1733"]
[BlackElo "1245"]
[Annotator "NA RC COMBH"]
[PlyCount "63"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 d5 2. Nf3 c5 3. Bf4 Nc6 4. dxc5 Bg4 5. c3 Bxf3 6. exf3 e5 7. Bg3 Bxc5 8. Bb5 f6 9. O-O Nge7 10. Nd2 O-O 11. Nb3 Bb6 12. a4 a6 13. Bd3 Ba7 14. Qc2 h6 15. Rad1 Rc8 16. Qd2 Qb6 17. Bc2 d4 18. cxd4 Nxd4 19. Nxd4 Qxd4 20. Rfe1 Qxd2 21. Rxd2 Bd4 22. Rb1 Kh8 23. Be4 Rc7 24. f4 Rd8 25. b4 Rdc8 26. h3 Bc3 27. Rc2 f5 28. Bd3 e4 29. Bf1 Nd5 30. b5 axb5 31. axb5 b6 32. Rbc1 1/2-1/2

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "7"]
[White "Katsan, Danylo"]
[Black "Kutsyk, Roman"]
[Result "1/2-1/2"]
[ECO "D04"]
[WhiteElo "1447"]
[BlackElo "1456"]
[Annotator "NA RC COMBH"]
[PlyCount "36"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. b3 d5 2. Bb2 c5 3. Nf3 Nc6 4. e3 Nf6 5. d4 Bg4 6. Nbd2 e6 7. Bd3 Qb6 8. dxc5 Bxc5 9. O-O Be7 10. c4 O-O 11. h3 Bh5 12. Qb1 Nb4 13. Be2 Bg6 14. Qd1 h6 15. cxd5 exd5 16. Ne5 Bc2 17. Qe1 Bf5 18. Qd1 Bc2 1/2-1/2

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "7"]
[White "Karpinets, Andrian"]
[Black "Kutyra, Myroslav"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "1370"]
[BlackElo "1764"]
[Annotator "NA RC COMBH"]
[PlyCount "149"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c5 2. b3 Nc6 3. Bb2 d6 4. Bb5 Bd7 5. f4 e5 6. Ne2 Qh4+ 7. g3 Qh3 8. Ng1 Qg2 9. Qf3 Bh3 10. Bf1 Qxf1+ 11. Qxf1 Bxf1 12. Kxf1 Nf6 13. d3 Be7 14. Nd2 O-O-O 15. Ngf3 Ng4 16. Ke2 Bf6 17. f5 Nd4+ 18. Bxd4 exd4 19. Nf1 d5 20. h3 dxe4 21. hxg4 exf3+ 22. Kxf3 Bg5 23. Re1 h6 24. Rh2 Rhe8 25. Rhe2 Kd7 26. Rxe8 Rxe8 27. Rxe8 Kxe8 28. Ke4 Kd7 29. Kd5 b6 30. Nh2 Be3 31. Nf3 f6 32. Nh4 Bf2 33. Ng6 Bxg3 34. Nf8+ Ke7 35. Ne6 Bh2 36. Nxg7 Kd7 37. Ne6 Bg1 38. Nf4 Be3 39. Nh5 Bg5 40. Ng7 Bh4 41. Ne6 Be1 42. Nf8+ Ke7 43. Ng6+ Kd7 44. Nf4 Bg3 45. Nh5 Bh4 46. Nf4 Bg5 47. Ne6 Bh4 48. b4 cxb4 49. Nxd4 Be1 50. Ne2 Bd2 51. Ng3 Bg5 52. Ne4 a5 53. Nd6 Bh4 54. Ne4 Bg5 55. Nxg5 hxg5 56. d4 a4 57. Kc4 b3 58. cxb3 axb3 59. axb3 Kc6 60. d5+ Kd6 61. Kd4 Kc7 62. Kc4 Kd6 63. Kd4 Kc7 64. Ke4 Kd6 65. Kd4 Kc7 66. Kc4 Kd6 67. Kb5 Kxd5 68. Kxb6 Ke4 69. Kc5 Kf4 70. b4 Kxg4 71. b5 Kxf5 72. b6 Kg4 73. b7 f5 74. b8=Q f4 75. Kd4 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "7"]
[White "Tymchyshyn, Volodymyr"]
[Black "Gavker, Markiyan"]
[Result "0-1"]
[ECO "B85"]
[WhiteElo "1267"]
[BlackElo "1310"]
[Annotator "NA RC COMBH"]
[PlyCount "86"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e6 7. Be3 Be7 8. O-O O-O 9. f4 a6 10. Bf3 Qc7 11. Qe2 Nxd4 12. Bxd4 e5 13. fxe5 dxe5 14. Be3 Be6 15. Qf2 Bg4 16. Rad1 Bxf3 17. Qxf3 Rad8 18. Bf2 Bc5 19. Nd5 Bxf2+ 20. Rxf2 Nxd5 21. exd5 f5 22. Qb3 Rd6 23. Rdf1 f4 24. Re1 Qe7 25. Rfe2 Rf5 26. Qd3 g6 27. c4 b6 28. b4 Rd7 29. Qc3 Qf6 30. Rxe5 Re7 31. d6 Rexe5 32. Rxe5 Qxe5 33. Qxe5 Rxe5 34. Kf2 Kf7 35. Kf3 Ke6 36. Kxf4 Kxd6 37. Kf3 h6 38. a4 a5 39. c5+ bxc5 40. bxa5 c4 41. a6 Ra5 42. Ke4 Rxa6 43. Kd4 Rxa4 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "7"]
[White "Hychkevych, Vitaliy"]
[Black "Soroka, Denys"]
[Result "1-0"]
[ECO "D55"]
[WhiteElo "1251"]
[BlackElo "1624"]
[Annotator "NA RC COMBH"]
[PlyCount "97"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 d5 2. c4 Nf6 3. Nc3 c6 4. Bg5 e6 5. e3 Be7 6. Nf3 O-O 7. Be2 h6 8. Bh4 Nbd7 9. O-O Nh7 10. Bxe7 Qxe7 11. cxd5 exd5 12. Bd3 Ng5 13. Re1 Nxf3+ 14. Qxf3 Nf6 15. e4 dxe4 16. Nxe4 Nxe4 17. Bxe4 Qb4 18. d5 cxd5 19. Bxd5 Rb8 20. Re8 Be6 21. Rxb8 Rxb8 22. Bxe6 fxe6 23. b3 Qb6 24. h3 Rf8 25. Qe2 Rf6 26. Re1 Kf7 27. Rd1 Qc6 28. g3 Rf5 29. Qe3 a6 30. Rc1 Qd6 31. Qc3 Rd5 32. Qc7+ Qd7 33. Qf4+ Kg8 34. Rc7 Qe8 35. Rxb7 Rd7 36. Rb8 Rd8 37. Rxd8 Qxd8 38. Qe4 Qd6 39. Kg2 Kf7 40. Qb7+ Kf6 41. Qe4 Qa3 42. Qc2 Qa5 43. Qb2+ Kf7 44. b4 Qd5+ 45. Kh2 e5 46. Qb3 Qxb3 47. axb3 Ke6 48. Kg2 Kd5 49. Kf3 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "8"]
[White "Kikh, Andriy"]
[Black "Tsertsvadze, Anatoliy"]
[Result "0-1"]
[ECO "A22"]
[WhiteElo "1746"]
[BlackElo "1733"]
[Annotator "NA RC COMBH"]
[PlyCount "178"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. c4 e5 2. Nc3 Nf6 3. e4 c6 4. d3 Be7 5. f4 exf4 6. Bxf4 d6 7. Nf3 Bg4 8. Be2 Nbd7 9. O-O O-O 10. h3 Bh5 11. Qc2 Re8 12. a3 h6 13. Qd2 Kh7 14. Rad1 Bf8 15. Qc2 Ne5 16. Nd4 Bxe2 17. Ncxe2 Nh5 18. Bh2 g6 19. Nf3 Qd7 20. d4 Nxf3+ 21. Rxf3 Qe6 22. e5 dxe5 23. dxe5 Red8 24. Rdf1 Rd7 25. g4 Bc5+ 26. Kg2 Ng7 27. b4 Bb6 28. Rf6 Qe8 29. Nc3 Bd8 30. R6f2 Bh4 31. Rf3 Rad8 32. Ne4 Rd4 33. Rxf7 Qe6 34. Qe2 Rxc4 35. Bg3 Bxg3 36. Nxg3 Qd5+ 37. Qf3 Rc2+ 38. Kh1 Qxe5 39. Qf4 Rdd2 40. Rxg7+ Qxg7 41. Ne4 Rh2+ 42. Qxh2 Rxh2+ 43. Kxh2 Qe5+ 44. Ng3 Qb2+ 45. Kg1 Qxa3 46. Kf2 Qxb4 47. Re1 Qc5+ 48. Kf3 Qd5+ 49. Ne4 Kg7 50. Ke3 Qb3+ 51. Kf2 a5 52. Re3 Qc2+ 53. Re2 Qd3 54. Re3 Qd4 55. Kf3 a4 56. h4 b5 57. g5 h5 58. Nf2 Qd5+ 59. Kg3 Qd6+ 60. Kf3 a3 61. Re2 b4 62. Ne4 Qd3+ 63. Re3 Qxe3+ 64. Kxe3 a2 65. Nc5 a1=Q 66. Ne6+ Kf7 67. Nd4 Qg1+ 68. Kd3 Qg3+ 69. Kc2 c5 70. Nb5 b3+ 71. Kb2 c4 72. Nd6+ Ke6 73. Nxc4 Qxh4 74. Kxb3 Qxg5 75. Kc3 h4 76. Kd3 h3 77. Nd2 Qg3+ 78. Ke4 h2 79. Nf3 Qxf3+ 80. Kxf3 h1=Q+ 81. Ke3 g5 82. Kd4 g4 83. Ke3 g3 84. Kf4 g2 85. Ke4 g1=Q+ 86. Kf4 Qf2+ 87. Kg4 Qhg2+ 88. Kh5 Qff3+ 89. Kh6 Qfh3# 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "8"]
[White "Soroka, Denys"]
[Black "Korchevskyi, Volodymyr"]
[Result "1-0"]
[ECO "E00"]
[WhiteElo "1624"]
[BlackElo "1244"]
[Annotator "NA RC COMBH"]
[PlyCount "41"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. c4 e6 3. d5 Bc5 4. Nc3 O-O 5. Bg5 h6 6. Bh4 d6 7. e4 c6 8. Be2 cxd5 9. cxd5 Qb6 10. Qc2 Na6 11. Bxf6 Bxf2+ 12. Kf1 Bxg1 13. Rxg1 gxf6 14. a3 Nc5 15. b4 Nd7 16. Qd2 Kh7 17. g4 Rg8 18. Rg3 Nf8 19. Rh3 Rg6 20. Rc1 f5 21. exf5 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "8"]
[White "Kutsyk, Roman"]
[Black "Kozak, Dmytro"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "1456"]
[BlackElo "1937"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 9,115,55,54,54,388,376,372,385,384,382,393,386,502,496,533,515,548,461,574,575,635,638,620,633,611,602,677,605,630,614,675,643,641,630,613,505,533,537,541,536,578,581,583,586,564,550,548,508,569,563,583,575,565,498,612,594,674,645,715,627,730,714,813,800,718,703,847,732,709,673,762,742,749,743,726,677,675,644,702,685,875,864,1033,1004,1085,1075,1069,1069,1935,1341,29998,2692,29980,29981,29986,29987,29987,29988,29988,29989,29989,29990,29990,29991,29992,29991,29991,29992]} 1. d4 d5 2. Bf4 e6 3. e3 Bd6 4. Qg4 Qf6 5. Bxd6 cxd6 6. Nc3 {[#] Hoping for Nxd5. D00: 1 d4 d5: Unusual lines.} a6 $2 {[%mdl 8192]} (6... Qg6 $14 7. Qd1 Nc6) 7. Nxd5 $18 exd5 8. Qxc8+ {White is winning.} Qd8 {[#]} 9. Qxb7 $146 ({Predecessor:} 9. Qxd8+ Kxd8 10. Nf3 Nc6 11. c3 Nf6 12. Bd3 Ne4 13. Bxe4 dxe4 14. Ng5 Ke7 15. Nxe4 {1-0 Adewumi,T (1730)-Miranda Fernandez,M (1243) Wch FIDE Online U10 America qual rapid 2020 (2)}) 9... Nd7 10. Qxd5 Ngf6 11. Qxd6 Rb8 12. Qa3 {Against Qa5+} ({Weaker is} 12. Bxa6 Qa5+ 13. Ke2 Ne4 $11) 12... Qc7 13. Bd3 ({Not} 13. Bxa6 Ra8 14. Nf3 Qb6 $16) 13... a5 14. Nf3 h6 15. O-O Nd5 16. c3 {Against Nb4} Ne7 17. e4 {[%cal Be3e4,Be4e5][%mdl 32]} Nf6 18. Qa4+ Kf8 19. Qa3 g6 20. e5 Nfd5 21. Be4 Kg7 22. Qd6 Rhd8 23. Qxc7 Nxc7 24. Rab1 Rb6 25. Nd2 {[%cal Bf3d2,Bd2c4,Bc4e3][%mdl 32]} Ncd5 26. Nc4 {[%csl LRa5,LRb6]} Ra6 27. Bxd5 Nxd5 28. a4 Nf4 29. Rfe1 Rb8 30. g3 Nd5 31. Ne3 Nb6 32. b3 Rc8 33. c4 Ra7 34. d5 Rd7 35. Ng4 h5 36. Nf6 Rdd8 37. Ne4 Rc7 38. Nd6 Nd7 39. Nb5 Rb7 40. e6 fxe6 41. Rxe6 Nc5 42. Re3 Rf7 43. Rbe1 Kh6 44. f4 Na6 45. Re7 Rff8 46. Ra7 Nc5 47. Ree7 {[%csl Ga7][%cal Re7h7] [#]} Rh8 {Against Rh7+} 48. Nd4 {Nf3 would be deadly.} Rb8 49. d6 {[%cal Bd5d6,Bd6d7][%mdl 32] Black must now prevent Nf3.} Nxb3 50. Nxb3 (50. Nf5+ $142 gxf5 51. Re6#) 50... Rxb3 {[%mdl 4096] Endgame KRR-KRR} 51. d7 {White mates.} Rd3 52. c5 {[%cal Bc4c5,Bc5c6][%mdl 32]} Rd8 53. c6 Rd1+ 54. Kf2 Rd2+ 55. Ke3 Rd1 56. Ke2 Rc1 57. Re8 Rc2+ 58. Kd3 {White took control after the opening.   Weighted Error Value: White=0.10 (very precise) /Black=0.83} 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "8"]
[White "Katsan, Danylo"]
[Black "Hychkevych, Vitaliy"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "1447"]
[BlackElo "1251"]
[Annotator "NA RC COMBH"]
[PlyCount "113"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. Nf3 d5 2. d4 Nf6 3. Bf4 g6 4. e3 Bg7 5. c3 O-O 6. h3 a6 7. a4 b6 8. Nbd2 Bb7 9. Be2 Nbd7 10. O-O c5 11. Bh2 c4 12. Ne5 Rc8 13. f3 Nxe5 14. Bxe5 Bh6 15. Bxf6 Bxe3+ 16. Kh1 exf6 17. Nb1 Bh6 18. f4 b5 19. axb5 axb5 20. f5 Qb6 21. Bg4 Ra8 22. Rxa8 Rxa8 23. Qe1 g5 24. h4 Qc6 25. Na3 Re8 26. Qd2 Re4 27. hxg5 Bxg5 28. Qd1 Qd6 29. Nc2 Qg3 30. Bh3 Bf4 31. Qg4+ Qxg4 32. Bxg4 Bg5 33. Bf3 Rf4 34. Be2 Rh4+ 35. Kg1 Bf4 36. Bf3 Bc8 37. Bxd5 Bxf5 38. g3 Rh5 39. Rxf4 Bxc2 40. Bc6 Kg7 41. d5 f5 42. Bxb5 Be4 43. Bxc4 Rh1+ 44. Kf2 Rh2+ 45. Ke3 Rxb2 46. g4 Rc2 47. gxf5 Rxc3+ 48. Kd4 Rh3 49. Kxe4 h5 50. d6 Kf6 51. Kd5 Rh1 52. d7 Ke7 53. Kc6 Rd1 54. Re4+ Kf6 55. Bd5 Rc1+ 56. Rc4 Rxc4+ 57. Bxc4 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "8"]
[White "Gavker, Markiyan"]
[Black "Karpinets, Andrian"]
[Result "0-1"]
[ECO "B32"]
[WhiteElo "1310"]
[BlackElo "1370"]
[Annotator "NA RC COMBH"]
[PlyCount "90"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb3 Nf6 6. Nc3 Bb4 7. Bd3 d5 8. exd5 Nxd5 9. Bd2 Nxc3 10. bxc3 Be7 11. O-O O-O 12. f4 a5 13. a4 Be6 14. Be3 exf4 15. Bxf4 Bf6 16. Qd2 Qd5 17. Rad1 Qh5 18. Be2 Bg4 19. Bxg4 Qxg4 20. Nd4 Rad8 21. Qf2 Nxd4 22. cxd4 Rfe8 23. c3 Re2 24. Qf3 Qxf3 25. Rxf3 Rc8 26. Ra1 Rc2 27. Ra3 R2xc3 28. Be5 Rxa3 29. Rxa3 Bxe5 30. dxe5 Kf8 31. Kf2 Ke7 32. Rb3 Rc4 33. Rxb7+ Ke6 34. Ra7 Rxa4 35. h3 Ra3 36. Ke2 Ra1 37. Kf2 a4 38. Ra5 a3 39. g4 h6 40. Kg2 Ra2+ 41. Kg3 Ra1 42. Kg2 h5 43. gxh5 a2 44. h4 Kf5 45. Ra4 Kxe5 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "8"]
[White "Tsikh, Vladyslav"]
[Black "Tyurin, Rostyslav"]
[Result "0-1"]
[ECO "C25"]
[WhiteElo "1245"]
[BlackElo "1262"]
[Annotator "NA RC COMBH"]
[PlyCount "96"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 e5 2. Nc3 Nc6 3. f4 d6 4. Nf3 Bg4 5. Bb5 a6 6. Bxc6+ bxc6 7. fxe5 dxe5 8. d3 Nf6 9. O-O Be7 10. Be3 O-O 11. Qd2 Bxf3 12. Rxf3 Ng4 13. Rff1 Nxe3 14. Qxe3 Rb8 15. b3 Bb4 16. Ne2 h6 17. Kh1 Qg5 18. Qxg5 hxg5 19. Ng3 f6 20. Nf5 g6 21. Ne3 Kg7 22. Nc4 Rh8 23. Rf3 Rh4 24. Raf1 Rf4 25. g3 Rxf3 26. Rxf3 Rh8 27. Kg2 Bc3 28. Rf1 Bb4 29. Rf3 Rf8 30. Rf1 Rb8 31. a4 Bc3 32. Rf3 Rf8 33. Rf1 f5 34. exf5 gxf5 35. Ne3 f4 36. gxf4 exf4 37. Nc4 Re8 38. Kf3 Kg6 39. Rf2 Kf5 40. Rg2 Re1 41. Rf2 Re8 42. h3 Rh8 43. Kg2 Re8 44. Kf3 Re1 45. Kg2 Bd4 46. Rf1 Re2+ 47. Kf3 Rxc2 48. Re1 Rf2# 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "9"]
[White "Koptsiukh, Vladimir"]
[Black "Gavker, Markiyan"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2021"]
[BlackElo "1310"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 9,88,72,72,80,52,42,68,69,150,133,154,127,151,113,160,161,455,258,247,169,335,339,390,383,412,263,312,260,267,252,302,88,149,-279,-264,-444,-445,-440,-427,-437,-439,-426,-286,-687,-684,-643,-654,-637,-635,-601,-580,-552,-490,-589,-518,-641,-653,-671,-632,-700,-704,-1096,-1068,-1085,-1035,-1399,-1441,-2172,-2035,-29982,-29983,-29969,-4789,-29985,-29986,-29986,-29987,-29987,-29988,-29988,-29989]} 1. e4 c5 2. c3 e5 3. Nf3 Nc6 4. Bc4 h6 5. d4 exd4 6. cxd4 {B22: Sicilian: 2 c3.} cxd4 7. Nxd4 {And now Nc3 would win.} Bb4+ 8. Nc3 {Threatens to win with 0-0. White is slightly better.} Bxc3+ ({Black should try} 8... Nge7 $14) 9. bxc3 $16 {[#] aiming for Nb5.} Nge7 $146 ({Predecessor:} 9... Nxd4 10. Qxd4 f6 11. Ba3 Qe7 12. Bxe7 Nxe7 13. e5 {1-0 Kuprasz,B (1339)-Voigt,J (1234) DSOL 07 Liga Gr-B 1st rapid 2020 (5.3)}) 10. O-O $40 {[%mdl 128] White is out for blood.} O-O 11. Nb5 Ne5 (11... d5 $142 12. Bxd5 (12. exd5 Na5 $16) 12... a6) 12. Bb3 {A strong pair of Bishops.} b6 $2 (12... d5 {was worth a try.} 13. exd5 (13. Bxd5 a6 $14) 13... a6) 13. Nd6 (13. f4 $142) 13... Ba6 $18 14. Re1 {[%cal Bf1e1,Be1e3,Be3g3][%mdl 32] Qh5 is the strong threat.} Nd3 $2 (14... N7g6 15. g3 Qe7) 15. Re3 Nxc1 16. Rxc1 (16. Qxc1 Qc7 $18) 16... Ng6 17. Rg3 Kh7 18. Qg4 {Against Nf4} (18. Bxf7 Nf4 $16) 18... Qf6 19. Rd1 ({Not} 19. Qxd7 Nf4 20. Bd1 (20. Bxf7 $2 {loses.} Rad8 $19) 20... g6 $11) 19... Rad8 {[#]} 20. f4 $2 Nxf4 (20... Qxf4 $142 21. Qf5 Qxf5 22. exf5 Ne5) 21. Kh1 $2 {[%mdl 8192] This costs White the game.} (21. Rf3 $16 g5 22. Rd2) 21... Be2 $19 22. Qf5+ (22. e5 {was the only chance.} Qxe5 23. Re1) 22... Qxf5 23. Nxf5 Bxd1 ({But not} 23... g6 $2 24. Nd6 Bxd1 25. Bxd1 $19) 24. Rxg7+ Kh8 25. Bxd1 d5 26. e5 (26. Rg4 dxe4 {[%mdl 64] Discovered Attack} 27. Bb3) 26... Rde8 27. Rg3 Rxe5 {[%cal Re5e1]} 28. Ne3 Rfe8 29. Nf1 Ne2 30. Rf3 Kg7 {[%cal Oe2c3]} 31. Bb3 Nc1 32. Bc2 Nxa2 33. Kg1 Nc1 34. Ng3 Re1+ 35. Kf2 {[#]} R8e2+ $1 36. Nxe2 Rxe2+ 37. Kg3 Rxc2 {[%mdl 4096] Endgame KRN-KR} 38. Re3 a5 {[%cal Ba7a5,Ba5a4,Ba4a3][%mdl 32] ...a4 would be deadly.} 39. Re5 Rxc3+ 40. Kh4 Rc4+ (40... a4 $142 41. Kg4 a3 42. Re8 a2 43. Ra8 Rc5 44. Kf5 Ra5 45. Rxa5 bxa5 46. Ke5 a1=Q+ 47. Kxd5 Qa2+ 48. Kc5 a4 49. g4 Qe6 50. h3 a3 51. h4 a2 52. g5 Nd3+ 53. Kd4 a1=Q+ 54. Kxd3 Qd1+ 55. Kc3 Qeb3#) 41. g4 a4 {Black mates.} 42. Rxd5 a3 43. Rd8 b5 44. Ra8 Ra4 {Weighted Error Value: White=1.09/Black=0.50} 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "9"]
[White "Kozak, Dmytro"]
[Black "Hychkevych, Vitaliy"]
[Result "0-1"]
[ECO "B24"]
[WhiteElo "1937"]
[BlackElo "1251"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

{[%evp 15,82,-6,4,0,0,0,0,-13,0,0,55,-23,61,14,49,11,20,21,145,148,141,71,69,31,38,36,28,18,75,93,70,8,0,12,43,69,84,93,71,0,73,58,203,208,301,292,729,0,175,208,1595,0,29995,-29985,-29986,-29985,-29986,-29986,-29986,-29986,-29987,-29988,-29989,-29989,-29990,-29990,-29991,-29991,-29992]} 1. e4 c5 2. Nc3 e6 3. g3 Nc6 4. Bg2 d6 5. Nge2 Be7 6. O-O Nf6 7. d3 {7.d3 is better than 7.d4.} O-O 8. h3 Rb8 9. f4 {B24: Closed Sicilian: 3 g3 sidelines.} Bd7 10. g4 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 11. Ng3 {The position is equal.} b4 12. Nce2 {[#]} Qb6 $146 (12... h6 $11) ({Predecessor:} 12... Ne8 13. g5 g6 14. Be3 f5 15. exf5 gxf5 16. d4 Nc7 17. dxc5 dxc5 18. Qd2 Be8 {1-0 Mezentsev,I (2354)-Pichot,A (2606) Titled Tuesday intern op 4th Febr blitz 2020 (7)}) 13. Kh1 (13. g5 $14) 13... Nd4 (13... h6 $11) 14. Be3 (14. g5 $14 Ne8 15. Nxd4 cxd4 16. f5) 14... Rbc8 15. f5 Nxe2 16. Qxe2 Qc7 (16... h6 $11) 17. g5 $16 Ne8 {[%cal Od6d5]} 18. Rf2 (18. f6 $142 gxf6 19. gxf6 Bxf6 20. Nh5) 18... d5 19. Nh5 {f6 would be deadly.} (19. Bf4 $5 {[%cal Rf4c7]} e5 20. Bd2 $14) 19... g6 {[%cal Re6f5]} 20. f6 Bd6 21. Nf4 d4 (21... dxe4 $11 22. dxe4 (22. Bxe4 Be5 $17) 22... c4) 22. Bd2 c4 23. Re1 (23. dxc4 $14 Qxc4 24. e5 Qxe2 25. Rxe2) 23... c3 $11 24. bxc3 bxc3 25. Bc1 {Hoping for e5.} Qa5 26. e5 Bb8 27. Qg4 (27. Qe4 $16) 27... Bxe5 (27... Qxa2 $2 28. Nd5 exd5 29. Qxd7 $18) (27... Rc5 $1 $11 {remains equal.}) 28. Qh4 $1 $16 ({Much worse is} 28. Nd5 exd5 29. Qxd7 Bg3 30. Qxc8 (30. Qxd5 $2 {is the wrong capture.} Qxd5 31. Bxd5 Bxf2 $19) 30... Nc7 $11) 28... Bc6 ({Black should play} 28... Bxf4 $1 $14 29. Bxf4 h5) 29. Qh6 $18 {[%cal Oe1e5] And now Rxe5! would win.} Bxg2+ (29... Bxf6 $142 30. gxf6 Nxf6) 30. Nxg2 {[%cal Oe1e5] Black must now prevent Rxe5!} ({Less strong is} 30. Rxg2 Rc5 $14) 30... Bg3 {[#]} (30... Bxf6 31. gxf6 Rc5) 31. Rfe2 $2 Bxe1 (31... Qxa2 $2 32. Re4 Qa6 33. Rg1 $18) (31... Rc5 $1 $11 {and Black stays safe.}) 32. Rxe1 Qxa2 $2 {[#]} (32... Rb8) 33. Re4 $2 (33. Kh2 $1 $18 {White wants to mate with Re4.} Qb2 34. Bxb2 cxb2 35. Re4) 33... Qxc2 $4 {[%mdl 8192] [#]} (33... Qa1 $11 34. Re1 Rc6) 34. Rh4 $4 {[%mdl 8192]} Qxc1+ {Black mates.} 35. Kh2 {[#]} Nxf6 $1 36. Nf4 {[#]} Nh5 $1 37. Nxh5 gxh5 38. Qxh5 Qd2+ 39. Kh1 Qxd3 40. g6 Qxg6 41. Rg4 c2 {Weighted Error Value: White=0.69/Black=0.52} 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "9"]
[White "Tsertsvadze, Anatoliy"]
[Black "Soroka, Denys"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "1733"]
[BlackElo "1624"]
[Annotator "NA RC COMBH"]
[PlyCount "112"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 d5 2. Nf3 Nc6 3. Bf4 Bf5 4. e3 e6 5. c3 Bd6 6. Bg3 Nf6 7. Nbd2 O-O 8. Ne5 Bxe5 9. dxe5 Nd7 10. f4 f6 11. exf6 Nxf6 12. Be2 Qe8 13. Qb3 Rb8 14. O-O Qg6 15. Rae1 Ne4 16. Nxe4 Bxe4 17. Bf3 Ne7 18. Qb4 Bxf3 19. Rxf3 Nc6 20. Qa4 a6 21. f5 Rxf5 22. Rxf5 Qxf5 23. Bxc7 Rf8 24. Qf4 Qc2 25. Qg3 Qxb2 26. Bd6 Rf6 27. h3 Qxc3 28. a3 e5 29. Bb4 Nxb4 30. axb4 Qxb4 31. Rc1 Qe7 32. Qg4 Rf8 33. Rc8 Rxc8 34. Qxc8+ Kf7 35. Qf5+ Qf6 36. Qd7+ Kg6 37. Qxb7 Qd6 38. Qb1+ Kh6 39. g4 Qc5 40. Kf2 d4 41. Qf5 dxe3+ 42. Kg3 g6 43. g5+ Kg7 44. Qf6+ Kg8 45. Qd8+ Kf7 46. Qf6+ Kg8 47. Qe6+ Kf8 48. Qf6+ Ke8 49. Qh8+ Qf8 50. Qxe5+ Qe7 51. Qh8+ Kd7 52. Qa8 e2 53. Qb7+ Ke8 54. Qa8+ Kf7 55. Qd5+ Kf8 56. Qa8+ Kg7 0-1

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "9"]
[White "Karpinets, Andrian"]
[Black "Kutsyk, Roman"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "1370"]
[BlackElo "1456"]
[Annotator "NA RC"]
[PlyCount "7"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 1/2-1/2

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "9"]
[White "Tymchyshyn, Volodymyr"]
[Black "Kutyra, Myroslav"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "1267"]
[BlackElo "1764"]
[Annotator "NA RC COMBH"]
[PlyCount "59"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c6 2. d4 d5 3. e5 Bf5 4. c4 e6 5. Nc3 Nd7 6. a3 dxc4 7. Bxc4 Nb6 8. Be2 Ne7 9. h4 Ned5 10. Nxd5 exd5 11. Bg4 Qd7 12. Bxf5 Qxf5 13. Nf3 h6 14. Qe2 Be7 15. Bd2 O-O 16. Rc1 Rfe8 17. O-O Nd7 18. Qe3 Nf8 19. Qf4 Qh5 20. g4 Qg6 21. h5 Qh7 22. Qg3 Ne6 23. Be3 a5 24. Nh2 Bg5 25. f4 Bd8 26. Nf3 Qd3 27. Rfe1 Bb6 28. Rcd1 Qc4 29. f5 Nf8 30. f6 1-0

[Event "2nd Memorial Petro Katsan 2023"]
[Site "Chernonograd"]
[Date "2023.01.22"]
[Round "9"]
[White "Tyurin, Rostyslav"]
[Black "Katsan, Danylo"]
[Result "1/2-1/2"]
[ECO "B86"]
[WhiteElo "1262"]
[BlackElo "1447"]
[Annotator "NA RC COMBH"]
[PlyCount "58"]
[EventDate "2023.01.24"]
[EventRounds "9"]
[EventCountry "UKR"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "600+5"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. O-O Be7 8. Bb3 O-O 9. a3 Nc6 10. Nf3 b5 11. h3 Bb7 12. Re1 Qc7 13. Bg5 h6 14. Bh4 Nd7 15. Bg3 Nc5 16. Qe2 Rfd8 17. Rad1 Nxb3 18. cxb3 Na5 19. b4 Nc4 20. Rc1 Qb6 21. Ra1 d5 22. exd5 Bxd5 23. Nxd5 Rxd5 24. b3 Nd6 25. Rad1 Rxd1 26. Rxd1 Nf5 27. Bf4 Rd8 28. Rxd8+ Qxd8 29. Qc2 Qd7 1/2-1/2

