[Event "World op 51st"]
[Site "Philadelphia"]
[Date "2023.07.04"]
[Round "8"]
[White "Shlyakhtenko, Robert"]
[Black "Underwood, Toshinori"]
[Result "1-0"]
[ECO "E20"]
[WhiteElo "2427"]
[BlackElo "1869"]
[PlyCount "49"]
[EventDate "2023.06.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. f3 d5 7. cxd5 exd5 8. e3 0-0 9. Bd3 Nc6 10. Ne2 Re8 11. 0-0 h6 12. Ra2 Bd7 13. Nf4 Rc8 14. g4 c4 15. Bb1 Na5 16. h4 Nh7 17. Rh2 g6 18. h5 g5 19. Nxd5 Nb3 20. e4 Nxc1 21. Qxc1 f5 22. gxf5 Bxf5 23. Ne3 Be6 24. e5 Rf8 25. Qc2 1-0

[Event "World op 51st"]
[Site "Philadelphia"]
[Date "2023.07.01"]
[Round "2"]
[White "Pang, Qi"]
[Black "Underwood, Toshinori"]
[Result "1-0"]
[ECO "E05"]
[WhiteElo "2187"]
[BlackElo "1869"]
[PlyCount "183"]
[EventDate "2023.06.30"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "USA"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. Nf3 Nf6 2. g3 e6 3. d4 d5 4. Bg2 Be7 5. 0-0 0-0 6. c4 dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Bg5 Nbd7 11. Nc3 h6 12. Bxf6 Nxf6 13. Rfe1 Bd5 14. Qd3 c5 15. e4 Bc6 16. d5 exd5 17. exd5 Nxd5 18. Nxd5 Bxd5 19. Rxe7 Qxe7 20. Qxd5 Rfd8 21. Qe5 Re8 22. Qxe7 Rxe7 23. Bf1 Rd8 24. Bc4 Kf8 25. Kg2 Re4 26. Rc1 Ke7 27. b3 g5 28. h4 f6 29. hxg5 fxg5 30. Rc2 Kf6 31. Nd2 Red4 32. Nf1 R8d7 33. Ne3 h5 34. Be2 Rd2 35. Rxd2 Rxd2 36. Bxh5 Rb2 37. Bd1 b5 38. axb5 axb5 39. Kf3 Ke5 40. Bc2 Kf6 41. Ke4 Ke6 42. f3 c4 43. bxc4 bxc4 44. Kd4 Rb8 45. Nxc4 Rf8 46. Ke4 Kf6 47. f4 Re8+ 48. Kf3 Rc8 49. Bd3 Rd8 50. Be4 gxf4 51. gxf4 Rb8 52. Ne3 Rb3 53. Bc2 Rb5 54. Ng4+ Ke6 55. Bd3 Ra5 56. Bc4+ Kf5 57. Ne3+ Kf6 58. Ng4+ Kf5 59. Bd3+ Ke6 60. Ne3 Kf6 61. Ke4 Ke6 62. f5+ Kf7 63. Kf4 Kf6 64. Ng4+ Kg7 65. f6+ Kf7 66. Bf5 Ra8 67. Bc2 Rb8 68. Kf5 Rb2 69. Ne5+ Kf8 70. Be4 Rf2+ 71. Ke6 Rxf6+ 72. Kxf6 Kg8 73. Nf7 Kf8 74. Bh7 Ke8 75. Ne5 Kd8 76. Ke6 Kc7 77. Nd7 Kb7 78. Bd3 Kc6 79. Be2 Kc7 80. Bf3 Kd8 81. Kd6 Ke8 82. Bh5+ Kd8 83. Bg6 Kc8 84. Nc5 Kd8 85. Nb7+ Kc8 86. Kc6 Kb8 87. Kb6 Ka8 88. Bf5 Kb8 89. Bd7 Ka8 90. Nc5 Kb8 91. Na6+ Ka8 92. Bc6# 1-0

