[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2021.07.09"]
[Round "7"]
[White "Groot, Rob"]
[Black "Peper, Jeroen"]
[Result "0-1"]
[ECO "C01"]
[PlyCount "70"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Bd6 5. Bd3 Ne7 6. Bg5 0-0 7. 0-0 c6 8. c3 Qc7 9. Bxe7 Qxe7 10. Qc2 h6 11. Re1 Qc7 12. Nbd2 Nd7 13. a4 Nf6 14. Ne5 Bxe5 15. dxe5 Ng4 16. Nf3 Re8 17. Qe2 f6 18. h3 Nxe5 19. Nd4 Bd7 20. Bf5 Bxf5 21. Nxf5 Nc4 22. Qxe8+ Rxe8 23. Rxe8+ Kh7 24. Re7 Qf4 25. Rxg7+ Kh8 26. g4 h5 27. Re1 Ne5 28. Re3 Nf3+ 29. Kf1 Qc4+ 30. Kg2 Nh4+ 31. Nxh4 Kxg7 32. Nf5+ Kg6 33. Kg3 hxg4 34. hxg4 Kg5 35. f4+ Qxf4+ 0-1

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2020.09.25"]
[Round "6"]
[White "Zwinkels, Wim"]
[Black "Groot, Rob"]
[Result "1-0"]
[ECO "B25"]
[WhiteElo "1806"]
[PlyCount "85"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 Nf6 6. f4 0-0 7. Nf3 d6 8. 0-0 Qb6 9. Rb1 e5 10. fxe5 dxe5 11. Be3 Ng4 12. Nd5 Qa5 13. Bd2 Qd8 14. h3 Nf6 15. Bg5 Qd6 16. c4 Nxd5 17. cxd5 Nd4 18. Nxd4 cxd4 19. Qb3 b6 20. Rbc1 Bd7 21. Rf2 Rac8 22. Rfc2 Bf6 23. Bd2 a5 24. Rxc8 Rxc8 25. Rxc8+ Bxc8 26. Qc4 Bd7 27. h4 Bd8 28. b4 h5 29. Bf3 Kg7 30. a3 f5 31. Qc1 Kf7 32. Kg2 Qc7 33. Qc4 Qd6 34. Qa6 Qc7 35. Qc4 Qd6 36. Bd1 f4 37. gxf4 exf4 38. Qxd4 Bxh4 39. e5 f3+ 40. Bxf3 Qe7 41. e6+ Bxe6 42. dxe6+ Kg8 43. Qd7 1-0

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2020.02.21"]
[Round "5"]
[White "Groot, Rob"]
[Black "Binnendijk, Wilfried"]
[Result "0-1"]
[ECO "C01"]
[BlackElo "1860"]
[PlyCount "110"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nf6 5. Bd3 Bd6 6. Qe2+ Qe7 7. Qxe7+ Bxe7 8. Bf4 c6 9. Nbd2 0-0 10. 0-0 Bg4 11. h3 Bh5 12. Rfe1 Re8 13. Ne5 Nbd7 14. Ndf3 Nf8 15. g4 Bg6 16. Nxg6 Nxg6 17. Bxg6 hxg6 18. Ng5 Nh7 19. Nxh7 Kxh7 20. g5 Kg8 21. Re3 Bb4 22. c3 Rxe3 23. Bxe3 Bd6 24. f4 Re8 25. Kf2 f6 26. h4 Kf7 27. Re1 Re4 28. Bd2 Ke6 29. Rxe4+ dxe4 30. c4 Kf5 31. Kg3 fxg5 32. hxg5 e3 33. Bxe3 Ke4 34. c5 Bxc5 35. dxc5 Kxe3 36. Kg4 Ke4 37. a4 a6 38. a5 Kd5 39. f5 Ke5 40. fxg6 Ke4 41. b3 Ke5 42. Kf3 Kf5 43. Ke3 Kxg5 44. Ke4 Kxg6 45. Ke5 Kf7 46. Kd6 g5 47. Kc7 g4 48. Kxb7 g3 49. Kxa6 g2 50. Kb6 g1Q 51. a6 Qg3 52. Kb7 Qxb3+ 53. Ka8 Qb5 54. a7 Qxc5 55. Kb8 Qf8+ 0-1

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2020.01.24"]
[Round "4"]
[White "Evenhuis, Wybe"]
[Black "Groot, Rob"]
[Result "0-1"]
[ECO "E91"]
[WhiteElo "1862"]
[PlyCount "52"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Nf3 d6 3. c4 g6 4. Nc3 Nbd7 5. e4 Bg7 6. Be2 c5 7. d5 0-0 8. h3 a6 9. 0-0 Ne8 10. Be3 Ne5 11. Nxe5 Bxe5 12. f4 Bg7 13. Bf3 Rb8 14. e5 b5 15. Qb3 Bb7 16. cxb5 axb5 17. Ne4 Qa5 18. Bf2 c4 19. Qc2 dxe5 20. Bc5 Nd6 21. Nxd6 exd6 22. Bxd6 Qb6+ 23. Qf2 Qxd6 24. fxe5 Bxe5 25. Rac1 Qf6 26. Qa7 Bd4+ 0-1

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2019.12.20"]
[Round "3"]
[White "Groot, Rob"]
[Black "Engelen, Niels"]
[Result "1-0"]
[ECO "B01"]
[BlackElo "1633"]
[PlyCount "45"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 4. Bc4 g6 5. Ne2 Bg7 6. c3 Nb6 7. Bb3 e5 8. Be3 0-0 9. 0-0 Nc6 10. dxe5 Nxe5 11. Nd2 Bf5 12. Nf4 Nd3 13. Nxd3 Bxd3 14. Re1 Ba6 15. Bc5 Re8 16. Rxe8+ Qxe8 17. Qf3 Rd8 18. Ne4 Nd7 19. Bd4 Bxd4 20. cxd4 h6 21. Re1 Qf8 22. Qg3 Qb4 23. Qxg6+ 1-0

[Event "Leiden SB-ch 1920"]
[Site "Leiden"]
[Date "2019.11.29"]
[Round "2"]
[White "Van den Biggelaar, Don"]
[Black "Groot, Rob"]
[Result "1-0"]
[ECO "C21"]
[WhiteElo "1735"]
[PlyCount "71"]
[EventDate "2019.11.08"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. d4 exd4 3. c3 d3 4. Bxd3 d6 5. Qb3 Nd7 6. Be3 Ne5 7. Be2 b6 8. Nf3 Be6 9. Qc2 Be7 10. Nbd2 Nf6 11. Nxe5 dxe5 12. Nf3 Nd7 13. Rd1 Qc8 14. 0-0 f6 15. Qa4 c6 16. b4 a5 17. b5 c5 18. Bc4 Nf8 19. Bd5 Bxd5 20. exd5 Bd6 21. Nd2 Qc7 22. Nc4 0-0-0 23. Nxd6+ Rxd6 24. Qg4+ Kb8 25. c4 h5 26. Qe4 g5 27. h3 Qd7 28. Rd3 h4 29. Ra3 Rh6 30. Rb1 Ng6 31. Bxc5 bxc5 32. Rxa5 Nf4 33. b6 f5 34. b7 Ra6 35. Qxe5+ Qd6 36. Qe8+ 1-0

