[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "6"]
[White "Ardila, Oscar Humberto"]
[Black "Koval, David W"]
[Result "1-0"]
[ECO "B02"]
[WhiteElo "1971"]
[BlackElo "2209"]
[PlyCount "77"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. d3 d5 2. Nd2 e5 3. e4 Nf6 4. Ngf3 c6 5. Be2 Bd6 6. 0-0 h6 7. c3 0-0 8. Qc2 Be6 9. Re1 Nbd7 10. Nf1 Qc7 11. Ng3 Rae8 12. b3 dxe4 13. Nxe4 Nxe4 14. dxe4 Kh7 15. Be3 g5 16. a4 Bc5 17. Bxc5 Nxc5 18. b4 Nd7 19. Red1 Rd8 20. Nd2 a5 21. Bc4 Bg4 22. f3 Bh5 23. Nf1 axb4 24. cxb4 Qb6+ 25. Kh1 Qxb4 26. Rab1 Qc5 27. Rxb7 Nb6 28. Bb3 Rd4 29. Ng3 Rxd1+ 30. Qxd1 Bg6 31. Nf5 Bxf5 32. exf5 Kg7 33. h4 Qf2 34. f6+ Kxf6 35. hxg5+ hxg5 36. Qd6+ Kf5 37. Qd3+ Kf4 38. Qe4+ Kg3 39. Qg4# 1-0

[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "8"]
[White "Bayo Milagro, Alvaro"]
[Black "Koval, David W"]
[Result "0-1"]
[ECO "B76"]
[WhiteElo "2285"]
[BlackElo "2209"]
[PlyCount "44"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. g4 Nxd4 10. Bxd4 Be6 11. h4 Qa5 12. h5 Rac8 13. hxg6 fxg6 14. Qh2 Rf7 15. Bd3 Qb4 16. g5 Qxd4 17. gxf6 Bxf6 18. f4 Qe3+ 19. Kd1 Rxc3 20. bxc3 Bxc3 21. Rb1 Bg4+ 22. Be2 Qd2# 0-1

[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "5"]
[White "Ferrufino, Boris"]
[Black "Koval, David W"]
[Result "1-0"]
[ECO "B76"]
[WhiteElo "1911"]
[BlackElo "2209"]
[PlyCount "61"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 0-0 8. Qd2 Nc6 9. g4 Bd7 10. h4 Rc8 11. h5 Ne5 12. Bh6 Bxh6 13. Qxh6 Rxc3 14. bxc3 Qa5 15. Kd2 Rc8 16. Qe3 Bxg4 17. hxg6 fxg6 18. fxg4 Nxe4+ 19. Qxe4 Qxc3+ 20. Ke2 Qxa1 21. Qd5+ Kh8 22. g5 Qc3 23. Rh3 Qb2 24. Rb3 Qc1 25. Bh3 Rf8 26. Re3 Qg1 27. Rxe5 Rf2+ 28. Kd3 Qg3+ 29. Re3 Qf4 30. Qe4 Qf8 31. Qxe7 1-0

[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "10"]
[White "Koval, David W"]
[Black "Chemin, Vitorio"]
[Result "1-0"]
[ECO "D32"]
[WhiteElo "2209"]
[BlackElo "2131"]
[PlyCount "101"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 cxd4 5. Qxd4 Nc6 6. Qd3 exd5 7. Nf3 Nf6 8. a3 a6 9. Bg5 Be7 10. e3 0-0 11. Rd1 Bg4 12. Be2 Bxf3 13. Bxf3 Ne5 14. Qe2 Nxf3+ 15. Qxf3 Qa5 16. 0-0 Rfd8 17. Rd4 Rd7 18. Rfd1 Rad8 19. Bxf6 Bxf6 20. Rxd5 Rxd5 21. Rxd5 Rxd5 22. Qxd5 Qxd5 23. Nxd5 Bxb2 24. a4 Kf8 25. Kf1 Ke8 26. Ke2 Kd7 27. Kd3 Kc6 28. Nb4+ Kc5 29. Nc2 b5 30. axb5 a5 31. f4 a4 32. b6 Kxb6 33. Kc4 a3 34. Kb3 Bc1 35. Nxa3 Bxe3 36. Nc4+ Kc5 37. Nxe3 Kd4 38. Nf5+ Ke4 39. Nxg7 Kxf4 40. Kc2 Ke3 41. g3 Kf3 42. Nh5 Kg4 43. Nf6+ Kh3 44. Kd3 Kxh2 45. g4 Kg3 46. Ke4 Kh4 47. Kf5 h6 48. Ne8 Kg3 49. Nd6 f6 50. Ne4+ Kh4 51. Nxf6 1-0

[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "4"]
[White "Koval, David W"]
[Black "Nathan, Krishna"]
[Result "1/2-1/2"]
[ECO "D00"]
[WhiteElo "2209"]
[BlackElo "2028"]
[PlyCount "148"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. d4 Nf6 2. Nc3 d5 3. f3 c5 4. e4 cxd4 5. Qxd4 Nc6 6. Bb5 dxe4 7. Qxd8+ Kxd8 8. Bf4 e5 9. 0-0-0+ Kc7 10. Bxc6 exf4 11. Bxe4 Nxe4 12. Nd5+ Kc6 13. fxe4 f5 14. Ne2 fxe4 15. Nexf4 g5 16. Ne2 Be6 17. Ndc3 Bg4 18. Nd4+ Kb6 19. Rde1 Re8 20. h3 Bd7 21. Rhf1 Bc5 22. Rf6+ Kc7 23. Nb3 Be7 24. Nd5+ Kb8 25. Rf7 Be6 26. Rxe7 Bxd5 27. Rxe8+ Rxe8 28. Nd4 Rf8 29. Re2 Kc7 30. Kd2 Kd6 31. Ke3 Ke5 32. a3 h5 33. c3 h4 34. Nc2 Rf1 35. Rf2 Re1+ 36. Re2 Rxe2+ 37. Kxe2 Kf4 38. Kf2 Be6 39. Ne3 b5 40. Nf1 Ke5 41. Ne3 Kf4 42. Nf1 a6 43. Ne3 Ke5 44. Nc2 a5 45. Ke3 Bd7 46. Nd4 a4 47. Ne2 Kd5 48. Nd4 Ke5 49. Ne2 g4 50. hxg4 Bxg4 51. Nc1 Bh5 52. b3 axb3 53. Nxb3 Bd1 54. Nd4 Bh5 55. Nxb5 Kd5 56. Nd4 Kc4 57. Kxe4 Kxc3 58. Nf5 Bg6 59. Kf4 Kb3 60. Nxh4 Bf7 61. Kg5 Kxa3 62. g4 Kb4 63. Nf5 Kc5 64. Kf6 Ba2 65. g5 Kc6 66. g6 Kd7 67. Kg7 Ke8 68. Nd6+ Kd7 69. Nf7 Ke7 70. Nh6 Bb3 71. Nf5+ Ke8 72. Kh7 Ba2 73. g7 Kd7 74. g8Q Bxg8+ 1/2-1/2

[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "11"]
[White "Koval, David W"]
[Black "Shevchuk, Olexandr"]
[Result "1-0"]
[ECO "D31"]
[WhiteElo "2209"]
[BlackElo "2093"]
[PlyCount "97"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. c4 e6 2. Nc3 d5 3. d4 c6 4. Nf3 dxc4 5. a4 Bb4 6. Bg5 Ne7 7. e3 b5 8. g3 Bb7 9. Bg2 h6 10. Bxe7 Qxe7 11. 0-0 0-0 12. axb5 Bxc3 13. bxc3 cxb5 14. Qb1 a6 15. e4 Nd7 16. Re1 Nb6 17. Re3 Na4 18. Ne5 Rab8 19. Qc2 Nb6 20. f4 g6 21. Rf1 Kg7 22. Bh3 f6 23. Nxg6 Kxg6 24. Bxe6 Kg7 25. f5 Nd7 26. Qf2 Qd6 27. g4 Kh7 28. Qh4 Rh8 29. Bxd7 Qxd7 30. Qxf6 Rhg8 31. h3 h5 32. Qh4 Qf7 33. e5 Kh6 34. Rg3 Rg5 35. Rf4 Rbg8 36. Kh2 Qd5 37. Rf1 a5 38. f6 b4 39. f7 Rf8 40. gxh5 Rxg3 41. Qf6+ Kh7 42. Kxg3 Qg2+ 43. Kh4 bxc3 44. Qf5+ Kh8 45. e6 c2 46. h6 Be4 47. Qf6+ Kh7 48. e7 Qxf1 49. Qg7# 1-0

[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "2"]
[White "Koval, David W"]
[Black "Slovineanu, Viacheslav"]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "2209"]
[BlackElo "2412"]
[PlyCount "92"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. d4 Nf6 2. Nc3 d5 3. f3 Nbd7 4. e4 dxe4 5. fxe4 e5 6. Nf3 Bb4 7. dxe5 Ng4 8. h3 Ngxe5 9. Nxe5 Qh4+ 10. Ke2 Nxe5 11. Qd4 Bxc3 12. bxc3 Qh5+ 13. g4 Nxg4 14. hxg4 Bxg4+ 15. Kf2 Qxh1 16. Qe5+ Be6 17. Bf4 Qh4+ 18. Bg3 Qf6+ 19. Qxf6 gxf6 20. Bxc7 Rc8 21. Bd6 Rxc3 22. Bd3 a6 23. Rd1 h5 24. Bg3 h4 25. Bf4 h3 26. Kg1 Rg8+ 27. Kh2 Rg2+ 28. Kh1 Rcxc2 29. Bxc2 Rxc2 30. a3 b5 31. e5 fxe5 32. Bg5 f5 33. Bf6 e4 34. Rd6 Kf7 35. Bg5 f4 36. Bxf4 Kf6 37. Rxa6 Kf5 38. Bh2 Bd5 39. Rd6 Rd2 40. Kg1 e3 41. Bg3 Rg2+ 42. Kf1 Rxg3 43. Rxd5+ Ke4 44. Rxb5 h2 45. Rh5 Rg1+ 46. Ke2 h1Q 0-1

[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "7"]
[White "Koval, David W"]
[Black "Wang, Alexander J"]
[Result "1/2-1/2"]
[ECO "D32"]
[WhiteElo "2209"]
[BlackElo "1911"]
[PlyCount "164"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. Bg5 Be7 7. Bxe7 Ngxe7 8. e3 c4 9. g3 0-0 10. Bg2 Be6 11. 0-0 h6 12. h4 a6 13. a4 Rb8 14. Ne2 b5 15. Nf4 Qd7 16. b3 c3 17. axb5 axb5 18. Nd3 b4 19. Nfe5 Qc8 20. f4 f6 21. Nf3 Bf7 22. Nh2 Nf5 23. Qf3 Re8 24. Rfe1 Ncxd4 25. exd4 Nxd4 26. Qf2 Nxb3 27. Rab1 Rxe1+ 28. Qxe1 Nd2 29. Rxb4 Rxb4 30. Nxb4 c2 31. Nd3 Nb3 32. h5 c1Q 33. Nxc1 Qxc1 34. Qxc1 Nxc1 35. g4 Ne2+ 36. Kf2 Nxf4 37. Bf3 Nh3+ 38. Ke3 Ng5 39. Bg2 Be6 40. Kd4 Kf7 41. Bf1 Ne4 42. Be2 Ng3 43. Bf3 Ne4 44. Bxe4 dxe4 45. Kxe4 Bc8 46. Kf4 Bb7 47. Nf1 Ba6 48. Ne3 Bb7 49. Nf1 Bc6 50. Ng3 Bd7 51. Ne4 Be6 52. Nd6+ Kg8 53. Nb5 Bd7 54. Nd4 Bc8 55. Nc6 Bd7 56. Nd4 Kf7 57. Nf3 Bc6 58. Nd4 Bd5 59. Nf5 Be6 60. Nd6+ Kg8 61. Ne4 Bd5 62. Nc3 Be6 63. Ne2 Kf7 64. Nd4 Bc8 65. Nb5 Bd7 66. Nd6+ Kg8 67. Ne4 Be6 68. Nf2 Kf7 69. Ne4 Bd5 70. Nd2 Ke6 71. Nf1 Bb3 72. Ne3 Kf7 73. Nf5 Kg8 74. Nd6 Bf7 75. Ne4 Be6 76. Nc5 Kf7 77. Nd3 Ke7 78. Nf2 Kf7 79. Ne4 Bd7 80. Nf2 Bc6 81. Nd3 Bd5 82. Nf2 Be6 1/2-1/2

[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "9"]
[White "Melillo, Lucius"]
[Black "Koval, David W"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "2274"]
[BlackElo "2209"]
[PlyCount "67"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. Nc3 c5 2. Nf3 g6 3. d4 cxd4 4. Qxd4 Nf6 5. e4 Nc6 6. Qa4 Qc7 7. Nd5 Nxd5 8. exd5 Ne5 9. Bf4 Bg7 10. Be2 0-0 11. 0-0 Nxf3+ 12. Bxf3 d6 13. c3 Bd7 14. Qc2 Bb5 15. Rfe1 Rfe8 16. Qd2 a5 17. Rac1 a4 18. c4 Bd7 19. c5 Qb8 20. c6 Bc8 21. c7 Qa7 22. Bxd6 Bf8 23. Bc5 Qa6 24. d6 Qb5 25. dxe7 Bg7 26. Qd8 Bd7 27. Bxb7 Qxb7 28. Qxd7 Qxb2 29. Ba3 Qb7 30. Qxe8+ Rxe8 31. c8Q Rxc8 32. Rxc8+ Qxc8 33. e8Q+ Qxe8 34. Rxe8+ 1-0

[Event "Titled Tuesday intern op 23rd Apr Late"]
[Site "Chess.com INT"]
[Date "2024.04.23"]
[Round "3"]
[White "Omariev, Maksim"]
[Black "Koval, David W"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2304"]
[BlackElo "2209"]
[PlyCount "131"]
[EventDate "2024.04.23"]
[EventType "swiss (blitz)"]
[EventRounds "11"]
[EventCountry "USA"]
[SourceTitle "CB18_2024"]
[SourceDate "2024.05.01"]
[SourceVersion "1"]
[SourceVersionDate "2024.05.01"]
[SourceQuality "2"]

1. b3 c5 2. c4 b6 3. Bb2 Bb7 4. Nc3 e6 5. e3 Nf6 6. Nf3 d5 7. d4 cxd4 8. Nxd4 a6 9. Nf3 Bb4 10. a3 Be7 11. Be2 0-0 12. 0-0 dxc4 13. Bxc4 b5 14. Be2 Nc6 15. b4 Rc8 16. Qb3 Qb6 17. Rac1 Rfd8 18. Rfd1 h6 19. h3 Bf8 20. Nb1 Be7 21. Nbd2 Nd5 22. Ne4 Bf8 23. Nc5 Nce7 24. Nxb7 Qxb7 25. Nd4 Ng6 26. Bf3 Qb6 27. Rxc8 Rxc8 28. Bxd5 exd5 29. Qxd5 Rd8 30. Qb3 Ne5 31. Nf5 Rxd1+ 32. Qxd1 Qf6 33. Nd4 Nc4 34. Bc1 Bd6 35. Nf3 Qe6 36. Nd4 Qe5 37. g3 Kh7 38. Qf3 f6 39. Qf5+ Qxf5 40. Nxf5 Be5 41. Nd4 Bxd4 42. exd4 Kg6 43. Kf1 Kf7 44. Ke2 Ke6 45. Kd3 Kd5 46. f3 f5 47. g4 fxg4 48. hxg4 Nd6 49. f4 Ne4 50. g5 hxg5 51. fxg5 g6 52. Bf4 Nf2+ 53. Ke3 Nd1+ 54. Kd2 Nb2 55. Kc3 Nc4 56. Bc7 Nxa3 57. Bb6 Nc4 58. Bc5 Ke4 59. Kc2 Ne3+ 60. Kd2 Nd5 61. Ke2 Kf5 62. Kf3 Kxg5 63. Ke4 Kf6 64. Kxd5 g5 65. Ke4 a5 66. bxa5 1-0

[Event "USA-chT Amateur East"]
[Site "Parsippany"]
[Date "2006.02.20"]
[Round "5"]
[White "Koval, David W"]
[Black "Corcoran, Paul A"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2209"]
[PlyCount "37"]
[EventDate "2006.02.18"]
[EventType "team"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CBM 111 Extra"]
[Source "ChessBase"]
[SourceDate "2006.05.09"]
[SourceVersion "1"]
[SourceVersionDate "2006.05.09"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 g6 3. e4 d6 4. Bc4 Bg7 5. Qe2 Nbd7 6. f4 e5 7. fxe5 dxe5 8. Nf3 exd4 9. Bf4 c6 10. 0-0-0 0-0 11. Bd6 Re8 12. Ng5 Bh6 13. h4 Bxg5+ 14. hxg5 Nh5 15. Rxh5 gxh5 16. Qxh5 Re7 17. g6 Nf8 18. gxf7+ Kh8 19. Qe5+ 1-0

[Event "USA-chT Amateur East"]
[Site "Parsippany"]
[Date "2006.02.18"]
[Round "1"]
[White "Koval, David W"]
[Black "Bevington, Thomas"]
[Result "1/2-1/2"]
[ECO "A43"]
[WhiteElo "2209"]
[PlyCount "98"]
[EventDate "2006.02.18"]
[EventType "team"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "CBM 111 Extra"]
[Source "ChessBase"]
[SourceDate "2006.05.09"]
[SourceVersion "1"]
[SourceVersionDate "2006.05.09"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 e6 3. e4 c5 4. d5 d6 5. Nf3 Nbd7 6. Bd3 e5 7. 0-0 a6 8. a4 g6 9. Bg5 Bg7 10. Qd2 h6 11. Bh4 0-0 12. h3 Qe8 13. Ne2 c4 14. Bxc4 Nxe4 15. Qb4 Ndc5 16. Rfe1 g5 17. Bg3 Bd7 18. a5 Qd8 19. Bd3 Nxd3 20. cxd3 Nxg3 21. Nxg3 Bb5 22. d4 Re8 23. Nf5 Bf8 24. g4 Rc8 25. Qd2 e4 26. Nh2 Bd3 27. Nf1 Rc2 28. Qb4 Qd7 29. N1g3 Qb5 30. Qxb5 Bxb5 31. Nxe4 Rd8 32. Rac1 Rxb2 33. Rc7 Bg7 34. Nexd6 Rxd6 35. Nxd6 Bxd4 36. Nxb5 Bxf2+ 37. Kf1 Bxe1 38. Kxe1 Rxb5 39. d6 Rd5 40. d7 Kf8 41. Rxb7 Ke7 42. d8Q+ Kxd8 43. Rxf7 Rxa5 44. Rh7 Re5+ 45. Kd2 Re6 46. Kd3 Rc6 47. Kd4 Kc8 48. Kd5 Rf6 49. Kc5 Kb8 1/2-1/2

[Event "USA-chT Amateur East"]
[Site "Parsippany"]
[Date "2001.02.19"]
[Round "5"]
[White "Pinto, Mark A"]
[Black "Koval, David W"]
[Result "0-1"]
[ECO "B23"]
[WhiteElo "2136"]
[BlackElo "2209"]
[PlyCount "136"]
[EventDate "2001.02.17"]
[EventType "team"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. f4 g6 4. Nf3 Bg7 5. Bb5 Nd4 6. Bd3 d6 7. Nxd4 Bxd4 8. Ne2 Bg7 9. c3 Nh6 10. Bb5+ Bd7 11. Qa4 a6 12. Bxd7+ Qxd7 13. Qxd7+ Kxd7 14. d3 e6 15. 0-0 f5 16. h3 Rac8 17. Rd1 Rhe8 18. Be3 Ng8 19. g4 Rc7 20. Kg2 Kc6 21. Rd2 d5 22. e5 Bf8 23. b3 Ne7 24. Bf2 Kd7 25. Bh4 Nc6 26. Bf6 b5 27. c4 Rb8 28. Re1 bxc4 29. dxc4 d4 30. Nc1 a5 31. a4 Rcb7 32. Re3 Nb4 33. Rg3 Bh6 34. Rf3 Kc6 35. Kf1 Rd7 36. g5 Bf8 37. h4 Na6 38. h5 gxh5 39. Rh3 Rbb7 40. Rxh5 Nc7 41. Rh3 Na8 42. Ke2 Nb6 43. Kd3 Na8 44. Kc2 Nc7 45. Nd3 Na6 46. Rdh2 Rbc7 47. Rg2 Rb7 48. g6 hxg6 49. Rxg6 Rh7 50. Rgg3 Rbf7 51. Bg5 Rfg7 52. Kd2 Kd7 53. Ke2 Ke8 54. Kf2 Rb7 55. Rxh7 Rxh7 56. Kg2 Rb7 57. Nc1 Nb4 58. Rh3 Rg7 59. Kf2 Be7 60. Rh8+ Kf7 61. Bxe7 Kxe7 62. Rh3 Rg4 63. Rf3 Kf7 64. Kf1 Kg6 65. Kf2 Kh5 66. Kf1 Rh4 67. Ke2 Kg4 68. Rf2 d3+ 0-1

[Event "USA-chT Amateur East"]
[Site "Parsippany"]
[Date "2001.02.18"]
[Round "3"]
[White "Premkumar, Vikram"]
[Black "Koval, David W"]
[Result "0-1"]
[ECO "B70"]
[BlackElo "2209"]
[PlyCount "52"]
[EventDate "2001.02.17"]
[EventType "team"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. Nge2 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Nb3 d6 7. g3 Nf6 8. Bg2 0-0 9. 0-0 Bg4 10. f3 Be6 11. Be3 Ne5 12. Nd4 Bd7 13. Qc1 Nc4 14. Bf2 Rc8 15. b3 Ne5 16. Nce2 Nd3 17. Qb1 Nxf2 18. Kxf2 e5 19. c3 Qb6 20. Qd3 exd4 21. Nxd4 Rxc3 22. Qxc3 Nxe4+ 23. fxe4 Bxd4+ 24. Qxd4 Qxd4+ 25. Kf3 f5 26. Bh1 Qxe4+ 0-1

[Event "USA-chT Amateur East"]
[Site "Parsippany"]
[Date "2001.02.17"]
[Round "2"]
[White "Koval, David W"]
[Black "Vainberg, Vlad"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "2209"]
[PlyCount "73"]
[EventDate "2001.02.17"]
[EventType "team"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 Ne4 3. Bf4 c5 4. f3 Nf6 5. d5 d6 6. e4 Nbd7 7. a4 g6 8. Nh3 Bg7 9. c3 a6 10. Qd2 0-0 11. Na3 Ne5 12. Nf2 Bd7 13. Bxe5 dxe5 14. Nc4 b5 15. axb5 axb5 16. Rxa8 Qxa8 17. Nb6 Qa1+ 18. Nd1 c4 19. Be2 Rb8 20. Nxd7 Nxd7 21. 0-0 Nc5 22. g3 h5 23. h3 Kh7 24. g4 f6 25. Qe3 Qa7 26. h4 Qb6 27. Kg2 e6 28. f4 hxg4 29. f5 gxf5 30. exf5 Bh6 31. Qf2 exd5 32. Bxg4 Rg8 33. Kh3 d4 34. Bh5 Nd3 35. Bg6+ Kh8 36. Qe2 Rg7 37. Qh5 0-1

[Event "USA-chT Amateur East"]
[Site "Parsippany"]
[Date "2001.02.17"]
[Round "1"]
[White "McGeorge, Alan"]
[Black "Koval, David W"]
[Result "0-1"]
[ECO "B50"]
[BlackElo "2209"]
[PlyCount "30"]
[EventDate "2001.02.17"]
[EventType "team"]
[EventRounds "6"]
[EventCountry "USA"]
[SourceTitle "EXT 2002"]
[Source "ChessBase"]
[SourceDate "2001.11.25"]
[SourceVersion "1"]
[SourceVersionDate "2001.11.25"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. Bc4 Nf6 4. e5 dxe5 5. Nxe5 e6 6. Qf3 Qc7 7. Bb5+ Nbd7 8. Nxd7 Nxd7 9. Nc3 a6 10. Bc4 Bd6 11. Ne4 Ne5 12. Nxd6+ Qxd6 13. Qg3 Nxc4 14. Qxg7 Qe5+ 15. Qxe5 Nxe5 0-1

[Event "SVK-ch"]
[Site "Presov"]
[Date "1997.??.??"]
[Round "4"]
[White "Koval, David W"]
[Black "Kotan, Ladislav"]
[Result "1/2-1/2"]
[ECO "D30"]
[WhiteElo "2210"]
[BlackElo "2245"]
[PlyCount "83"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SVK"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Be7 5. 0-0 0-0 6. b3 c5 7. cxd5 exd5 8. d4 Nc6 9. Bb2 Bf5 10. Nc3 Qd7 11. Ne5 Qe6 12. Nxc6 bxc6 13. Na4 cxd4 14. Bxd4 Bh3 15. Rc1 Bxg2 16. Kxg2 Rfe8 17. Bxf6 Bxf6 18. e3 Rad8 19. Qf3 Be7 20. Nc5 Bxc5 21. Rxc5 Rd6 22. h3 Qd7 23. Qg4 Ree6 24. Rd1 Qe8 25. Rd4 Rg6 26. Qd1 Qe7 27. b4 Rde6 28. Rdxd5 h6 29. Rd7 Qh4 30. Qd2 Qe4+ 31. Kh2 Qf3 32. Rc2 Re4 33. Qe2 Qf5 34. Rd8+ Kh7 35. Rd4 Qe5 36. Rxe4 Qxe4 37. a3 Rf6 38. Qd2 h5 39. Rc3 g6 40. Qe2 h4 41. Rc4 Rxf2+ 42. Qxf2 1/2-1/2

[Event "SVK-ch"]
[Site "Presov"]
[Date "1997.??.??"]
[Round "1"]
[White "Krivoshey, Sergei"]
[Black "Koval, David W"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2425"]
[BlackElo "2210"]
[PlyCount "129"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SVK"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 0-0 8. Be3 c5 9. Qd2 Bg4 10. Be2 cxd4 11. cxd4 Nc6 12. Rd1 e6 13. 0-0 Qa5 14. Qxa5 Nxa5 15. h3 Bxf3 16. Bxf3 Nc4 17. Bf4 Rad8 18. d5 exd5 19. exd5 Be5 20. Bg5 f6 21. Bh6 Rfe8 22. h4 Nd6 23. Be3 b6 24. Bg4 f5 25. Bf3 Bf6 26. g3 Ne4 27. Kg2 Rd7 28. Rd3 Red8 29. Rfd1 Nc3 30. R1d2 Ne4 31. Rd1 Nc3 32. R1d2 Ne4 33. Bxe4 fxe4 34. Ra3 Be7 35. Ra4 Rxd5 36. Rxd5 Rxd5 37. Rxa7 Bc5 38. Bh6 Rf5 39. Bf4 Rf7 40. Ra8+ Rf8 41. Ra7 Rf7 42. Ra4 Re7 43. Be3 Bxe3 44. fxe3 h6 45. Rb4 Re6 46. Kh3 h5 47. g4 Rf6 48. gxh5 Rf3+ 49. Kg2 Rxe3 50. hxg6 Kg7 51. h5 Ra3 52. Rxe4 Kh6 53. Re8 Rxa2+ 54. Kg3 Ra5 55. Rh8+ Kg7 56. Rh7+ Kg8 57. Kg4 Rd5 58. Rb7 b5 59. h6 Rd4+ 60. Kf5 Rd5+ 61. Ke6 Rd8 62. h7+ Kh8 63. Kf6 Rf8+ 64. Kg5 Rd8 65. Kh6 1-0

[Event "SVK-ch"]
[Site "Presov"]
[Date "1997.??.??"]
[Round "5"]
[White "Shurygin, Sergey"]
[Black "Koval, David W"]
[Result "1-0"]
[ECO "A34"]
[WhiteElo "2365"]
[BlackElo "2210"]
[PlyCount "139"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SVK"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 c5 5. e4 Nxc3 6. dxc3 Qxd1+ 7. Kxd1 Nc6 8. Be3 e5 9. Bc4 Be7 10. Ke2 Bg4 11. h3 Bd7 12. Rhd1 Rd8 13. Rd2 Na5 14. Nxe5 Nxc4 15. Nxc4 Bb5 16. b3 Rxd2+ 17. Kxd2 Bxc4 18. bxc4 0-0 19. Kc2 Rd8 20. Rb1 Rd7 21. Rb5 b6 22. Rb1 Bd8 23. Bf4 Kf8 24. Rd1 Rxd1 25. Kxd1 Ke8 26. Kc2 Kd7 27. Kd3 Ke6 28. Bb8 a6 29. a4 g6 30. e5 Kd7 31. Ke4 Kc6 32. f4 Bh4 33. g4 Be1 34. Bd6 Bxc3 35. Bf8 b5 36. cxb5+ axb5 37. axb5+ Kxb5 38. Kd5 Bb4 39. f5 c4 40. Bxb4 Kxb4 41. e6 fxe6+ 42. fxe6 c3 43. e7 c2 44. e8Q c1Q 45. Qb8+ Ka5 46. Qa7+ Kb5 47. Qb7+ Ka5 48. Qxh7 g5 49. Qf5 Kb6 50. Ke5 Qc3+ 51. Ke6 Qxh3 52. Qxg5 Kc7 53. Qf5 Qb3+ 54. Ke7 Qb4+ 55. Kf7 Qc4+ 56. Kg7 Qd4+ 57. Kh7 Qg1 58. g5 Qh2+ 59. Kg8 Kd6 60. Qf6+ Kd7 61. g6 Qh5 62. Qf7+ Kd8 63. Qe6 Qg5 64. Kg7 Qh5 65. Qd6+ Kc8 66. Kg8 Kb7 67. Qd7+ Kb6 68. Qe6+ Kc7 69. g7 Qg5 70. Kf8 1-0

[Event "SVK-ch"]
[Site "Presov"]
[Date "1997.??.??"]
[Round "3"]
[White "Vavra, Pavel"]
[Black "Koval, David W"]
[Result "0-1"]
[ECO "C00"]
[WhiteElo "2390"]
[BlackElo "2210"]
[PlyCount "41"]
[EventDate "1997.??.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "SVK"]
[SourceTitle "EXT 1998"]
[Source "ChessBase"]
[SourceDate "1997.11.17"]
[SourceVersion "1"]
[SourceVersionDate "1997.11.17"]
[SourceQuality "1"]

1. e4 e6 2. Nc3 d5 3. g3 dxe4 4. Nxe4 Nd7 5. Bg2 Ngf6 6. Qe2 Be7 7. Nf3 0-0 8. d3 e5 9. 0-0 Nxe4 10. Qxe4 g6 11. d4 Bd6 12. Be3 Qe7 13. Rfe1 c6 14. dxe5 Nxe5 15. Nxe5 Bxe5 16. Rad1 Be6 17. c4 Bf5 18. Qh4 Qxh4 19. gxh4 Bxb2 20. Re2 Bg4 21. f3 0-1

[Event "World op 23rd"]
[Site "Philadelphia"]
[Date "1995.??.??"]
[Round "5"]
[White "Burnett, Ronald"]
[Black "Koval, David W"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "2370"]
[BlackElo "2245"]
[PlyCount "43"]
[EventDate "1995.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e6 2. Nc3 d5 3. Nf3 Nf6 4. e5 Nfd7 5. d4 c5 6. dxc5 Bxc5 7. Bd3 Nc6 8. Bf4 a6 9. 0-0 Qc7 10. Bg3 h5 11. Nxd5 Qd8 12. Bh4 Qa5 13. Nc3 Ndxe5 14. Re1 Bb4 15. Nxe5 Nxe5 16. Rxe5 Qxe5 17. Bb5+ Bd7 18. Qxd7+ Kf8 19. Bg3 Qg5 20. h4 Qg4 21. Be2 Qf5 22. Qxb7 1-0

[Event "World op 23rd"]
[Site "Philadelphia"]
[Date "1995.??.??"]
[Round "8"]
[White "Koval, David W"]
[Black "Bjornsson, Bjorn Freyr"]
[Result "1/2-1/2"]
[ECO "A61"]
[WhiteElo "2245"]
[BlackElo "2225"]
[PlyCount "27"]
[EventDate "1995.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Bf4 Bg7 8. Qa4+ Bd7 9. Qb3 b5 10. Bxd6 Qb6 11. Be5 0-0 12. e3 c4 13. Qd1 Na6 14. Qd4 1/2-1/2

[Event "World op 23rd"]
[Site "Philadelphia"]
[Date "1995.??.??"]
[Round "4"]
[White "Koval, David W"]
[Black "Farleigh, Richard"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2245"]
[PlyCount "69"]
[EventDate "1995.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 g6 3. e4 d6 4. Bc4 Bg7 5. Qe2 0-0 6. Bg5 h6 7. Bh4 Nc6 8. 0-0-0 e5 9. dxe5 Nxe5 10. Bb3 Qe8 11. Nb5 Qc6 12. f4 Bg4 13. Nf3 Nxf3 14. gxf3 Bd7 15. Nd4 Qb6 16. Qd2 c5 17. e5 dxe5 18. fxe5 Nh5 19. Ne2 Bb5 20. Bd5 Bxe5 21. c4 Bc6 22. Qc2 Ba4 23. b3 Bd7 24. Rhg1 Kh7 25. Be4 Bh3 26. Be7 Rg8 27. Kb1 Rae8 28. Bh4 Bf6 29. Bg3 Bh8 30. Rd6 Qa5 31. Be1 Qa3 32. Bxg6+ fxg6 33. Rgxg6 Bf5 34. Rxh6+ Kg7 35. Bc3+ 1-0

[Event "World op 23rd"]
[Site "Philadelphia"]
[Date "1995.??.??"]
[Round "6"]
[White "Koval, David W"]
[Black "Yeodoro, E."]
[Result "0-1"]
[ECO "D00"]
[WhiteElo "2245"]
[PlyCount "52"]
[EventDate "1995.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. d4 Nf6 2. Nc3 d5 3. f3 c6 4. e4 dxe4 5. fxe4 e5 6. Nf3 exd4 7. Qxd4 Qxd4 8. Nxd4 Bb4 9. Bd3 0-0 10. Bg5 Ng4 11. Be2 Re8 12. h3 h6 13. Bh4 Rxe4 14. 0-0-0 Bxc3 15. bxc3 Ne3 16. Rd3 Nxg2 17. Bf6 Nf4 18. Rg3 g6 19. Bc4 Nd7 20. Bd8 c5 21. Bc7 cxd4 22. Bxf4 Rxf4 23. Rxg6+ Kf8 24. Rxh6 dxc3 25. Bb5 Nb6 26. Re1 Be6 0-1

[Event "World op 23rd"]
[Site "Philadelphia"]
[Date "1995.??.??"]
[Round "3"]
[White "Lesser, Noah"]
[Black "Koval, David W"]
[Result "0-1"]
[ECO "C15"]
[BlackElo "2245"]
[PlyCount "50"]
[EventDate "1995.06.??"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "EXT 2000"]
[Source "ChessBase"]
[SourceDate "1999.11.16"]
[SourceVersion "1"]
[SourceVersionDate "1999.11.16"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. Qg4 Nf6 5. Qxg7 Rg8 6. Qh6 dxe4 7. Bd2 Nc6 8. 0-0-0 Qe7 9. Nh3 Bd7 10. Bg5 Rg6 11. Qh4 Bxc3 12. bxc3 Qa3+ 13. Kd2 Nd5 14. Qg3 e3+ 15. fxe3 Qxc3+ 16. Ke2 h6 17. e4 Qxc2+ 18. Rd2 Qxe4+ 19. Kf2 hxg5 20. Bd3 Rf6+ 21. Kg1 Qxd4+ 22. Nf2 0-0-0 23. h4 gxh4 24. Rh3 Qe5 25. Qg4 Qe1+ 0-1

[Event "SVK-ch"]
[Site "Topolcianky"]
[Date "1993.??.??"]
[Round "10"]
[White "Betko, Lubomir"]
[Black "Koval, David W"]
[Result "1-0"]
[ECO "C18"]
[BlackElo "2245"]
[PlyCount "63"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "SVK"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Qxg7 Rg8 9. Qxh7 cxd4 10. Ne2 Nbc6 11. f4 Bd7 12. Qd3 dxc3 13. Nxc3 a6 14. Ne2 Na5 15. Qc3 Nc4 16. Ng3 0-0-0 17. Nh5 Nf5 18. Nf6 Rg7 19. g4 Ncd6 20. Qxc7+ Kxc7 21. Be3 Nxe3 22. Kd2 Bc6 23. Rg1 Nef5 24. Bxa6 bxa6 25. gxf5 Rxg1 26. Rxg1 Rh8 27. Rg2 exf5 28. Kc1 Rh3 29. Rg7 Rxh2 30. Rxf7+ Kb6 31. e6 Kc5 32. Rc7 1-0

[Event "SVK-ch"]
[Site "Topolcianky"]
[Date "1993.??.??"]
[Round "6"]
[White "Debnar, Lubos"]
[Black "Koval, David W"]
[Result "1/2-1/2"]
[ECO "D88"]
[WhiteElo "2270"]
[BlackElo "2245"]
[PlyCount "32"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "SVK"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 0-0 8. Ne2 c5 9. 0-0 Nc6 10. Be3 cxd4 11. cxd4 Bd7 12. Rb1 b6 13. Qd2 e6 14. Bh6 Na5 15. Bd3 Qe7 16. Bxg7 Kxg7 1/2-1/2

[Event "SVK-ch"]
[Site "Topolcianky"]
[Date "1993.??.??"]
[Round "2"]
[White "Hudoba, Ondrej"]
[Black "Koval, David W"]
[Result "0-1"]
[ECO "C05"]
[BlackElo "2245"]
[PlyCount "90"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "SVK"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. f4 c5 6. Ngf3 Nc6 7. Bd3 cxd4 8. 0-0 Nc5 9. Nb3 Nxd3 10. Qxd3 Nb4 11. Qe2 b6 12. Nfxd4 Ba6 13. Nb5 Nxc2 14. Rb1 Bxb5 15. Qxb5+ Qd7 16. Qe2 Rc8 17. Bd2 g6 18. Kh1 a5 19. Bc3 Na3 20. Rbc1 Nb5 21. Bd4 Nxd4 22. Nxd4 Bc5 23. Nb5 a4 24. Rc2 0-0 25. Rfc1 Rfd8 26. h3 Ra8 27. Qd3 Qe7 28. Nd4 Qb7 29. Nf3 Qa6 30. Qd2 Qa5 31. Qd3 Qa6 32. Qd2 d4 33. Ng5 d3 34. Rc4 Be3 35. Qxe3 d2 36. Rc7 dxc1Q+ 37. Qxc1 Rdc8 38. Kh2 Rxc7 39. Qxc7 Qa7 40. Qc6 Rd8 41. Ne4 Qa8 42. Qxb6 Rd3 43. Nf6+ Kg7 44. Qf2 h6 45. Ng4 Qd8 0-1

[Event "SVK-ch"]
[Site "Topolcianky"]
[Date "1993.??.??"]
[Round "11"]
[White "Koval, David W"]
[Black "Cimra, Jozef"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2245"]
[BlackElo "2235"]
[PlyCount "30"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "SVK"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. g4 Na6 2. Bg2 Nb4 3. g5 h6 4. d3 Rb8 5. Kf1 d5 6. a4 Qd6 7. a5 Qa6 8. h4 Be6 9. Be3 f5 10. f3 g6 11. Nh3 Rh7 12. Nd2 Rf7 13. Nf2 Bg7 14. c3 d4 15. cxd4 Bd5 1/2-1/2

[Event "SVK-ch"]
[Site "Topolcianky"]
[Date "1993.??.??"]
[Round "9"]
[White "Koval, David W"]
[Black "Janos, Jozef"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2245"]
[PlyCount "141"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "SVK"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 c5 2. Nc3 Nc6 3. Nf3 g6 4. d4 cxd4 5. Nxd4 Bg7 6. Nxc6 bxc6 7. e4 Nf6 8. Be2 0-0 9. 0-0 d6 10. Be3 Be6 11. Qa4 Qc8 12. Rfd1 Nd7 13. Qc2 Qb7 14. b3 f5 15. exf5 Bxf5 16. Qd2 Nf6 17. f3 Rad8 18. Rac1 Kh8 19. Qe1 e5 20. Qh4 d5 21. cxd5 cxd5 22. Bc5 Rfe8 23. Nb5 Qb8 24. Bxa7 Qa8 25. a4 e4 26. Bd4 Ng8 27. Nc7 Bxd4+ 28. Rxd4 Qa7 29. Nb5 Qg7 30. Qf4 Rc8 31. Rc7 Rxc7 32. Qxc7 Re7 33. Qc3 exf3 34. Bxf3 Be4 35. Bxe4 dxe4 36. Rc4 e3 37. Qxg7+ Rxg7 38. Re4 Rd7 39. Rxe3 Nf6 40. h3 Kg7 41. Kf2 Nd5 42. Rd3 Rf7+ 43. Rf3 Rd7 44. Nd4 Re7 45. Nc6 Rc7 46. Nd4 Re7 47. Nc2 Rc7 48. Ne3 Nc3 49. Nc4 Nxa4 50. bxa4 Rxc4 51. Ra3 Kf6 52. a5 Rc7 53. a6 Ra7 54. Ra5 Ke6 55. Ke3 Kd6 56. Ke4 Ke6 57. g4 Kd6 58. Kd4 Kc6 59. Ke5 Kb6 60. Ra3 Kc6 61. Kf6 Kd5 62. Ra5+ Kc4 63. Kg5 Kb4 64. Ra1 Kc3 65. Kh6 Kd4 66. Ra5 Ke4 67. Kg5 Kd4 68. h4 Ke4 69. Kf6 Kf4 70. Ra4+ Kg3 71. h5 1-0

[Event "SVK-ch"]
[Site "Topolcianky"]
[Date "1993.??.??"]
[Round "7"]
[White "Koval, David W"]
[Black "Lipka, Juraj"]
[Result "1/2-1/2"]
[ECO "E46"]
[WhiteElo "2245"]
[BlackElo "2310"]
[PlyCount "22"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "SVK"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 Nf6 2. e3 e6 3. Nc3 Bb4 4. Nge2 0-0 5. d4 d6 6. g3 Nbd7 7. Bg2 e5 8. 0-0 Re8 9. Qc2 c6 10. Rd1 Qe7 11. a3 Bxc3 1/2-1/2

[Event "SVK-ch"]
[Site "Topolcianky"]
[Date "1993.??.??"]
[Round "3"]
[White "Koval, David W"]
[Black "Mihalik, Marek"]
[Result "0-1"]
[ECO "A28"]
[WhiteElo "2245"]
[PlyCount "54"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "SVK"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 e4 5. Ng5 h6 6. d5 Na5 7. Ngxe4 Nxc4 8. Qd4 Nb6 9. Qe5+ Qe7 10. Nxf6+ gxf6 11. Qxc7 Qb4 12. a3 Nxd5 13. Qxc8+ Rxc8 14. axb4 Bxb4 15. Bd2 Nxc3 16. Bxc3 Rxc3 17. Kd1 Rc5 18. Rxa7 0-0 19. Rxb7 Rfc8 20. e4 Rc1+ 21. Ke2 R8c2+ 22. Kf3 Bc5 23. Rc7 Rxb2 24. Kg4 Rxf2 25. g3 d6 26. Bg2 h5+ 27. Kh4 Rxh1 0-1

[Event "SVK-ch"]
[Site "Topolcianky"]
[Date "1993.??.??"]
[Round "1"]
[White "Koval, David W"]
[Black "Ridarcikova, Valeria"]
[Result "1/2-1/2"]
[ECO "A39"]
[WhiteElo "2245"]
[PlyCount "82"]
[EventDate "1993.??.??"]
[EventType "swiss"]
[EventRounds "11"]
[EventCountry "SVK"]
[SourceTitle "TD"]
[Source "ChessBase"]
[SourceDate "1994.03.01"]
[SourceVersion "1"]
[SourceVersionDate "1994.03.01"]
[SourceQuality "1"]

1. c4 Nf6 2. Nf3 g6 3. g3 Bg7 4. Bg2 0-0 5. 0-0 c5 6. d4 cxd4 7. Nxd4 Nc6 8. Nc3 Nxd4 9. Qxd4 d6 10. Rd1 a6 11. Qd2 Qc7 12. b3 Bd7 13. Bb2 Rac8 14. Rac1 Qb6 15. h3 Bc6 16. e4 Nd7 17. Nd5 Bxd5 18. Bxg7 Kxg7 19. Qxd5 Nf6 20. Qd2 a5 21. Rc2 Qc5 22. e5 dxe5 23. Bxb7 Rcd8 24. Qc1 Rxd1+ 25. Qxd1 Qb6 26. Bg2 Rd8 27. Rd2 Rxd2 28. Qxd2 Qd4 29. Qxa5 Nh5 30. Kh2 e4 31. Qe1 f5 32. Qe3 Qb2 33. a4 e5 34. a5 f4 35. Qxe4 Qxf2 36. Qxe5+ Kh6 37. gxf4 Nxf4 38. Qe4 Ne2 39. h4 Qg3+ 40. Kh1 Qe1+ 41. Kh2 Qg3+ 1/2-1/2

[Event "corr"]
[Site "corr"]
[Date "1985.??.??"]
[Round "?"]
[White "Koval, David W"]
[Black "Berman, G."]
[Result "0-1"]
[ECO "B78"]
[PlyCount "51"]
[EventDate "1985.09.20"]
[EventType "match (corr)"]
[EventRounds "10"]
[SourceTitle "Corr 2000"]
[Source "ChessBase"]
[SourceDate "2000.04.19"]
[SourceVersion "1"]
[SourceVersionDate "2000.04.19"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 0-0 9. Bc4 Bd7 10. h4 Rc8 11. Bb3 h5 12. 0-0-0 Ne5 13. Bg5 Rc5 14. g4 hxg4 15. Bxf6 Bxf6 16. h5 g5 17. Nd5 Rxd5 18. exd5 gxf3 19. c3 g4 20. Kb1 Qb6 21. Bc2 Nc4 22. Qc1 Rc8 23. Nf5 Na3+ 24. Ka1 Rxc3 25. Nxe7+ Kf8 26. Bf5 0-1

