[Event "Bruges Masters op"]
[Site "Bruges"]
[Date "2023.08.12"]
[Round "1"]
[White "Bogner, Sebastian"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "D78"]
[WhiteElo "2537"]
[BlackElo "1905"]
[PlyCount "84"]
[EventDate "2023.08.12"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "BEL"]
[SourceTitle "CBM 215 Extra"]
[Source "ChessBase"]
[SourceDate "2023.09.30"]
[SourceVersion "1"]
[SourceVersionDate "2023.09.30"]
[SourceQuality "1"]

1. d4 f5 2. g3 Nf6 3. Bg2 g6 4. Nf3 Bg7 5. 0-0 0-0 6. b3 Ne4 7. Bb2 a5 8. c4 c6 9. Nbd2 d5 10. Ne5 Nd7 11. Nd3 a4 12. Nf3 a3 13. Bc1 Nb6 14. c5 Nd7 15. Be3 Re8 16. Rc1 h6 17. b4 Kh7 18. Qb3 e5 19. Nfxe5 Nxe5 20. Nxe5 Bxe5 21. dxe5 Rxe5 22. Rcd1 Nf6 23. Rfe1 Re8 24. Bc1 b6 25. cxb6 Qxb6 26. Bxa3 Ng4 27. e3 Ba6 28. Bb2 Bc4 29. Qc3 Re7 30. a3 Rae8 31. h3 Ne5 32. Qc2 Nf7 33. Rd4 Nd6 34. Red1 Qa6 35. g4 Nb5 36. gxf5 Nxd4 37. fxg6+ Kg8 38. Rxd4 Qc8 39. Rh4 Rg7 40. Bxg7 Kxg7 41. Qc3+ Kxg6 42. Rg4+ Kf5 1-0

[Event "EU Corporate-ch"]
[Site "Rotterdam"]
[Date "2022.06.19"]
[Round "7"]
[White "Dekker, Derk"]
[Black "Heer, Stephan"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "1893"]
[BlackElo "2047"]
[PlyCount "75"]
[EventDate "2022.06.18"]
[EventType "team-tourn (rapid)"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 g6 2. d4 Bg7 3. Be3 d6 4. Nc3 a6 5. Bc4 b5 6. Bb3 Bb7 7. f3 Nd7 8. a4 b4 9. Nd5 c5 10. Ne2 e6 11. Ndf4 cxd4 12. Nxd4 e5 13. Nde6 fxe6 14. Nxe6 Qe7 15. Nc7+ Kd8 16. Ne6+ Kc8 17. Qd2 a5 18. c3 Nc5 19. Bxc5 dxc5 20. cxb4 Bh6 21. Qe2 cxb4 22. Qc4+ Kb8 23. Qb5 Nf6 24. Qxe5+ Ka7 25. Qd4+ Kb8 26. Qe5+ Ka7 27. Qxa5+ Kb8 28. Qe5+ Ka7 29. Qd4+ Kb8 30. 0-0 Ra5 31. Kh1 Rc8 32. Rfd1 Rc6 33. Rd3 Ka8 34. Nd8 Rc7 35. Nxb7 Rxb7 36. Rc1 Ra6 37. Rc8+ Rb8 38. Bd5+ 1-0

[Event "EU Corporate-ch"]
[Site "Rotterdam"]
[Date "2022.06.19"]
[Round "6"]
[White "Dekker, Derk"]
[Black "Oudshoorn, Arres"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "1893"]
[BlackElo "2137"]
[PlyCount "60"]
[EventDate "2022.06.18"]
[EventType "team-tourn (rapid)"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. d4 Nf6 2. Bg5 e6 3. e4 Be7 4. e5 Ng8 5. Bxe7 Nxe7 6. c4 d6 7. Nf3 Nbc6 8. Nc3 Ng6 9. exd6 cxd6 10. Qd2 a6 11. Bd3 e5 12. d5 Nce7 13. 0-0-0 Bg4 14. Be2 Nf4 15. h3 Bh5 16. g3 Nxe2+ 17. Qxe2 Rc8 18. g4 Bg6 19. Nh4 Qc7 20. f4 f6 21. fxe5 fxe5 22. Rhf1 Qxc4 23. Qf3 Qe4 24. Nxg6 Qxg6 25. Kd2 Rc4 26. Rde1 Rf4 27. Qe3 0-0 28. Rxf4 Rxf4 29. Qe2 Qf7 30. Kc1 Nxd5 0-1

[Event "EU Corporate-ch"]
[Site "Rotterdam"]
[Date "2022.06.18"]
[Round "1"]
[White "Rietman, Frits"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2237"]
[BlackElo "1893"]
[PlyCount "95"]
[EventDate "2022.06.18"]
[EventType "team-tourn (rapid)"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. Bg5 d6 6. c3 Bb6 7. Nbd2 h6 8. Bh4 Bg4 9. b4 a5 10. a3 Qe7 11. Bb5 axb4 12. axb4 Rxa1 13. Qxa1 0-0 14. h3 Bxf3 15. Nxf3 Nd8 16. 0-0 Ne6 17. Re1 Nf4 18. Qb1 Ng6 19. Bg3 Nh5 20. Bh2 Nhf4 21. Bg3 Ra8 22. d4 Qf6 23. dxe5 dxe5 24. Nd2 c6 25. Bc4 Rd8 26. Nb3 Qg5 27. Nc5 Nh4 28. Bf1 Rd2 29. Rd1 Rxd1 30. Qxd1 Bxc5 31. bxc5 Qe7 32. Kh2 Nhg6 33. Qd6 Kf8 34. Qb8+ Qe8 35. Qxb7 Ne6 36. Qb6 Kg8 37. Bc4 Ngf4 38. Bb3 Kh7 39. Ba4 f6 40. Bxc6 Qg6 41. Bd5 Nxd5 42. exd5 Nf4 43. Bxf4 exf4 44. Qe6 Qc2 45. f3 g5 46. c6 Qf2 47. c7 Qg3+ 48. Kg1 1-0

[Event "EU Corporate-ch"]
[Site "Rotterdam"]
[Date "2022.06.18"]
[Round "3"]
[White "Theulings, Paul Peter"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "C40"]
[WhiteElo "2063"]
[BlackElo "1893"]
[PlyCount "77"]
[EventDate "2022.06.18"]
[EventType "team-tourn (rapid)"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "EXT 2023"]
[Source "ChessBase"]
[SourceDate "2022.10.05"]
[SourceVersion "1"]
[SourceVersionDate "2022.10.05"]
[SourceQuality "1"]

1. Nf3 f5 2. d3 Nc6 3. e4 e5 4. d4 exd4 5. exf5 Nf6 6. Nxd4 Bb4+ 7. c3 Bc5 8. Nxc6 bxc6 9. Bd3 0-0 10. 0-0 d5 11. Bg5 Qd6 12. Nd2 a5 13. Re1 a4 14. Qf3 Rb8 15. b4 Ba7 16. a3 c5 17. Rad1 Bb7 18. Qh3 h6 19. Bh4 Rbe8 20. g4 cxb4 21. axb4 Qf4 22. Rxe8 Rxe8 23. Qg3 Qxg4 24. Qxg4 Nxg4 25. Bb5 Re5 26. h3 Nf6 27. Bd3 Ne4 28. Nxe4 dxe4 29. Bc4+ Kh7 30. Rd8 Rxf5 31. Rd7 Bb6 32. Bg3 Rf6 33. Bxc7 Bxf2+ 34. Kh2 e3 35. Bd3+ Rg6 36. Bxg6+ Kxg6 37. Re7 Bf3 38. c4 e2 39. Bg3 1-0

[Event "World Corporate East F"]
[Site "Chess.com INT"]
[Date "2021.02.20"]
[Round "4.6"]
[White "Benyo, Tamas"]
[Black "Dekker, Derk"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "2059"]
[BlackElo "1907"]
[PlyCount "170"]
[EventDate "2021.02.19"]
[EventType "team (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "Nokia Budapest"]
[BlackTeam "The Hague European Patent Office"]
[WhiteTeamCountry "HUN"]
[BlackTeamCountry "NED"]

1. d4 f5 2. Nc3 d5 3. Bf4 a6 4. e3 Nf6 5. Nf3 e6 6. Ne5 c5 7. Be2 g6 8. h4 Nc6 9. h5 Rg8 10. hxg6 hxg6 11. Bg5 Be7 12. Bxf6 Bxf6 13. Nxg6 cxd4 14. exd4 Nxd4 15. Bh5 Kd7 16. Qd2 Kc7 17. Qf4+ Qd6 18. Qxd6+ Kxd6 19. 0-0-0 Bd7 20. g3 Rac8 21. Nf4 b5 22. Nce2 Nxc2 23. Kb1 Nb4 24. Bf3 Rh8 25. a3 Nc6 26. Ng6 Rxh1 27. Rxh1 Rg8 28. Ngf4 Ne5 29. Bg2 Nc4 30. Rh7 Rg7 31. Rxg7 Bxg7 32. Nd3 Be8 33. Ka2 Bf7 34. b3 Nd2 35. Nd4 Bg6 36. Nf4 Bxd4 37. Nxg6 Bxf2 38. g4 fxg4 39. Nf4 Nf3 40. Nd3 Bd4 41. Nb4 a5 42. Nc2 e5 43. Kb1 Bc5 44. b4 axb4 45. axb4 Bf2 46. Kc1 e4 47. Kd1 Ke5 48. Ke2 Bb6 49. Ne1 Kf4 50. Nc2 d4 51. Na3 d3+ 52. Kd1 e3 53. Bf1 e2+ 54. Bxe2 dxe2+ 55. Kxe2 Nd4+ 56. Kf1 Kg3 57. Nb1 Kh2 58. Nd2 Nc2 59. Nf3+ Kg3 60. Ne5 Nxb4 61. Ke2 Nd5 62. Kd3 Kf4 63. Nxg4 Kxg4 64. Ke4 Nc7 65. Kd3 Kf5 66. Kc3 Ke5 67. Kb4 Kd5 68. Kb3 Kc5 69. Kc3 b4+ 70. Kb3 Kb5 71. Kb2 Na6 72. Kb3 Nc5+ 73. Kb2 Kc4 74. Kc2 b3+ 75. Kc1 Kb4 76. Kb2 Na4+ 77. Kb1 Bd4 78. Kc1 b2+ 79. Kb1 Ka3 80. Kc2 Bf6 81. Kb1 Nb6 82. Kc2 Nd5 83. Kb1 Nc7 84. Kc2 Ka2 85. Kd2 b1Q 0-1

[Event "World Corporate East F"]
[Site "Chess.com INT"]
[Date "2021.02.20"]
[Round "6.3"]
[White "Dekker, Derk"]
[Black "Einwiller, Bernd"]
[Result "0-1"]
[ECO "A57"]
[WhiteElo "1907"]
[BlackElo "2160"]
[PlyCount "56"]
[EventDate "2021.02.19"]
[EventType "team (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "The Hague European Patent Office"]
[BlackTeam "Bosch"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 axb5 6. e4 b4 7. Nb5 d6 8. Bc4 Nbd7 9. Nf3 Nb6 10. Bd3 c4 11. Bb1 Ba6 12. Nbd4 g6 13. 0-0 Bg7 14. Re1 0-0 15. Nc6 Qc7 16. Nxb4 Nfd7 17. Nc6 Nc5 18. e5 dxe5 19. Nfxe5 Rad8 20. Nxd8 Rxd8 21. Bf4 Nxd5 22. Qf3 Nxf4 23. Qxf4 Bxe5 24. Qh4 Bf6 25. Qg4 Bxb2 26. Bc2 Bxa1 27. Rxa1 Qe5 28. Rb1 Rd2 0-1

[Event "World Corporate East F"]
[Site "Chess.com INT"]
[Date "2021.02.20"]
[Round "5.1"]
[White "Munkhzul, Davaakhuu"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "C99"]
[WhiteElo "1991"]
[BlackElo "1907"]
[PlyCount "87"]
[EventDate "2021.02.19"]
[EventType "team (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "State Bank of Mongolia"]
[BlackTeam "The Hague European Patent Office"]
[WhiteTeamCountry "MGL"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. h3 d6 9. c3 Na5 10. Bc2 c5 11. d4 cxd4 12. cxd4 Qc7 13. Nbd2 Bb7 14. Nf1 Rac8 15. Bb1 Rfe8 16. Ng3 g6 17. Bg5 Nc4 18. Qe2 Kg7 19. Bd3 h6 20. Bxf6+ Bxf6 21. b3 Nb6 22. d5 Qd7 23. Qe3 Qd8 24. Rad1 Re7 25. Bb1 Na8 26. Ne2 Qb6 27. Qd2 Rec7 28. Rc1 a5 29. Bd3 Ba6 30. b4 a4 31. Nc3 Kh7 32. Rc2 Kg7 33. Rec1 Kh7 34. Qe2 Rb8 35. a3 Rcc8 36. Nxa4 Rxc2 37. Rxc2 bxa4 38. Bxa6 Nc7 39. Rc6 Qa7 40. Bd3 Be7 41. Qc2 Ne8 42. Ra6 Qb7 43. Qxa4 Rc8 44. Ra7 1-0

[Event "World Corporate East F"]
[Site "Chess.com INT"]
[Date "2021.02.19"]
[Round "1.7"]
[White "Dekker, Derk"]
[Black "Campaniello, Marco"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "1907"]
[PlyCount "93"]
[EventDate "2021.02.19"]
[EventType "team (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "The Hague European Patent Office"]
[BlackTeam "Saes Getters Spa"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "ITA"]

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. a3 Bxc3+ 6. bxc3 0-0 7. Bg5 h6 8. Bh4 Nc6 9. e3 b6 10. cxd5 exd5 11. Bd3 Re8 12. 0-0 Bg4 13. Bb5 Qd6 14. Bg3 Qe6 15. Qa4 Bxf3 16. gxf3 Nh5 17. Bxc6 Nxg3 18. hxg3 Kf8 19. Bxe8 Rxe8 20. Kg2 c6 21. Qxa7 b5 22. Qc5+ Re7 23. a4 g5 24. axb5 cxb5 25. Ra7 h5 26. Rb1 h4 27. Rxb5 hxg3 28. Qxe7+ Qxe7 29. Rxe7 Kxe7 30. fxg3 Ke6 31. g4 f5 32. gxf5+ Kxf5 33. Rxd5+ Ke6 34. e4 Kf6 35. Kg3 Ke6 36. Kg4 Kf6 37. Rd6+ Kg7 38. Kxg5 Kf7 39. c4 Ke7 40. c5 Kf7 41. e5 Ke7 42. c6 Kf7 43. c7 Ke7 44. c8Q Kf7 45. Qe6+ Kg7 46. Rd7+ Kf8 47. Qf7# 1-0

[Event "World Corporate East F"]
[Site "Chess.com INT"]
[Date "2021.02.19"]
[Round "3.3"]
[White "Dekker, Derk"]
[Black "Stojkovska, Monika"]
[Result "1-0"]
[ECO "C01"]
[WhiteElo "1907"]
[BlackElo "2106"]
[PlyCount "85"]
[EventDate "2021.02.19"]
[EventType "team (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "The Hague European Patent Office"]
[BlackTeam "Alkaloid"]
[WhiteTeamCountry "NED"]
[BlackTeamCountry "MKD"]

1. d4 e6 2. e4 d5 3. Nd2 Nc6 4. exd5 exd5 5. Ngf3 Bg4 6. c3 Bd6 7. Bd3 Nge7 8. 0-0 Qd7 9. Qa4 f6 10. Qc2 Bf5 11. Re1 0-0 12. Nf1 Bxd3 13. Qxd3 Qf5 14. Qb5 a6 15. Qa4 b5 16. Qd1 Na5 17. b3 Rfe8 18. Ne3 Qd7 19. Bd2 Nac6 20. Qc2 Bf4 21. Rad1 Bxe3 22. Bxe3 a5 23. Bf4 a4 24. b4 Nd8 25. Bg3 c6 26. Re2 Nf7 27. Rde1 Ng6 28. h4 Nf8 29. h5 Nh6 30. Nh4 Kf7 31. Bf4 Rxe2 32. Rxe2 Qg4 33. g3 Qxh5 34. Bxh6 gxh6 35. Nf5 Ng6 36. Nd6+ Kf8 37. Re6 Qg5 38. Qe2 Nf4 39. Re8+ Rxe8 40. Qxe8+ Kg7 41. Qf7+ Kh8 42. Qf8+ Qg8 43. Nf7# 1-0

[Event "World Corporate East F"]
[Site "Chess.com INT"]
[Date "2021.02.19"]
[Round "2.5"]
[White "Kandrashina, Svetlana"]
[Black "Dekker, Derk"]
[Result "0-1"]
[ECO "C59"]
[BlackElo "1907"]
[PlyCount "58"]
[EventDate "2021.02.19"]
[EventType "team (rapid)"]
[EventRounds "7"]
[EventCountry "USA"]
[SourceTitle "EXT 2022"]
[Source "ChessBase"]
[SourceDate "2021.10.06"]
[SourceVersion "1"]
[SourceVersionDate "2021.10.06"]
[SourceQuality "1"]
[WhiteTeam "MMK"]
[BlackTeam "The Hague European Patent Office"]
[WhiteTeamCountry "RUS"]
[BlackTeamCountry "NED"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2 h6 9. Nf3 e4 10. Ne5 Bd6 11. d4 0-0 12. 0-0 c5 13. c3 Bb7 14. Be3 Qc7 15. f4 exf3 16. Nxf3 Bxf3 17. Bxf3 Bxh2+ 18. Kh1 Rae8 19. Bg1 Bxg1 20. Kxg1 Nc4 21. Qb3 cxd4 22. cxd4 Ne3 23. Rf2 Nfg4 24. Bxg4 Nxg4 25. g3 Re1+ 26. Rf1 Re3 27. Qd5 Rxg3+ 28. Qg2 Ne3 29. Nc3 Rxg2+ 0-1

[Event "GER-chT Betriebe 18th"]
[Site "Altenberg Zinnwald"]
[Date "2018.11.11"]
[Round "7.3"]
[White "Santos, Paulo J"]
[Black "Dekker, Derk"]
[Result "0-1"]
[ECO "C48"]
[WhiteElo "1823"]
[BlackElo "1855"]
[PlyCount "76"]
[EventDate "2018.11.08"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Muenchen EPA II"]
[BlackTeam "Muenchen EPA"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Nd4 5. Ba4 c6 6. d3 b5 7. Bb3 Nxb3 8. axb3 d6 9. Ne2 Be7 10. 0-0 0-0 11. Bg5 Qc7 12. c4 bxc4 13. bxc4 Be6 14. Nc3 Rfb8 15. Qd2 Rb7 16. Rfb1 Rab8 17. Qc2 d5 18. Nd2 Bc5 19. Na4 Bf8 20. Bh4 Nd7 21. Bg3 f6 22. b3 g6 23. Nc3 Nb6 24. Na4 Nd7 25. f3 Bh6 26. Be1 Be3+ 27. Kf1 Qd6 28. Ke2 Bd4 29. Ra2 f5 30. Bf2 fxe4 31. fxe4 Bg4+ 32. Nf3 Rf8 33. Rf1 Qf6 34. Bxd4 exd4 35. cxd5 cxd5 36. h3 dxe4 37. dxe4 Ne5 38. Qc5 Qa6+ 0-1

[Event "GER-chT Betriebe 18th"]
[Site "Altenberg Zinnwald"]
[Date "2018.11.10"]
[Round "6.3"]
[White "Dekker, Derk"]
[Black "Leveikina, Jevgenija"]
[Result "1/2-1/2"]
[ECO "D15"]
[WhiteElo "1855"]
[BlackElo "2110"]
[PlyCount "73"]
[EventDate "2018.11.08"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Muenchen EPA"]
[BlackTeam "Herne Wanne Eickel EKJ"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 dxc4 5. e4 b5 6. e5 Nd5 7. a4 e6 8. Ng5 Be7 9. h4 Nxc3 10. bxc3 Bb7 11. Qf3 Bxg5 12. hxg5 Qd5 13. Qg4 c5 14. axb5 cxd4 15. Qxd4 Nd7 16. f4 Nb6 17. Ra5 0-0 18. Rh2 Rfd8 19. Be3 Qxd4 20. Bxd4 Be4 21. Bxb6 axb6 22. Ra6 Rxa6 23. bxa6 b5 24. g3 Ra8 25. Rb2 Bc6 26. a7 Rxa7 27. Bxc4 Rb7 28. Bd3 h6 29. gxh6 gxh6 30. Kd2 Kg7 31. Ke3 f6 32. exf6+ Kxf6 33. g4 e5 34. Rh2 exf4+ 35. Kxf4 Kg7 36. Rh5 b4 37. Rc5 1/2-1/2

[Event "GER-chT Betriebe 18th"]
[Site "Altenberg Zinnwald"]
[Date "2018.11.10"]
[Round "5.3"]
[White "Kaliski, Achim"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "1993"]
[BlackElo "1855"]
[PlyCount "71"]
[EventDate "2018.11.08"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Hamburg Baubehoerde"]
[BlackTeam "Muenchen EPA"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 4. d3 Nc6 5. Nf3 h6 6. 0-0 0-0 7. a3 a6 8. Be3 Ba7 9. Qd2 Ng4 10. Bxa7 Rxa7 11. h3 Nf6 12. Nh2 d6 13. f4 Be6 14. Ba2 Bxa2 15. Nxa2 Ra8 16. Nc3 Nd4 17. Ne2 Nxe2+ 18. Qxe2 c6 19. Rf2 exf4 20. c3 Qb6 21. Kh1 Nh5 22. Qf3 f5 23. Kg1 Ng3 24. exf5 Rae8 25. d4 Rxf5 26. Qd3 Rff8 27. Nf1 Qb5 28. c4 Qg5 29. Rd1 Nf5 30. Qb3 Nh4 31. Qxb7 f3 32. g3 Nf5 33. Qxc6 Re2 34. Qd5+ Kh8 35. Rxf3 Rxb2 36. g4 1-0

[Event "GER-chT Betriebe 18th"]
[Site "Altenberg Zinnwald"]
[Date "2018.11.09"]
[Round "4.3"]
[White "Brauer, Frank"]
[Black "Dekker, Derk"]
[Result "1/2-1/2"]
[ECO "C65"]
[WhiteElo "1791"]
[BlackElo "1855"]
[PlyCount "68"]
[EventDate "2018.11.08"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Frankfurt Commerzbank"]
[BlackTeam "Muenchen EPA"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. 0-0 d6 6. c3 Bb6 7. Nbd2 a6 8. Ba4 Bd7 9. h3 Ne7 10. Re1 0-0 11. Bc2 Ng6 12. Nf1 c6 13. Ng3 Re8 14. Be3 Bc7 15. d4 h6 16. a3 b5 17. Qd2 Kh7 18. Bb3 Be6 19. Bxe6 fxe6 20. dxe5 dxe5 21. Rad1 Qe7 22. b4 Rad8 23. Qc2 Nd7 24. c4 Nb6 25. Bc5 Qf7 26. cxb5 cxb5 27. Bxb6 Bxb6 28. Qc6 Qa7 29. Qc2 Rc8 30. Qb2 Rc4 31. Re2 Rf8 32. Red2 Rf7 33. Rd6 Rfc7 34. R1d2 Re7 1/2-1/2

[Event "GER-chT Betriebe 18th"]
[Site "Altenberg Zinnwald"]
[Date "2018.11.09"]
[Round "3.3"]
[White "Dekker, Derk"]
[Black "Sebastian, Martin"]
[Result "1/2-1/2"]
[ECO "E91"]
[WhiteElo "1855"]
[BlackElo "1957"]
[PlyCount "45"]
[EventDate "2018.11.08"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Muenchen EPA"]
[BlackTeam "Dresden Schachfestival"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. Nc3 g6 6. e4 d6 7. Nf3 Bg7 8. Be2 0-0 9. 0-0 axb5 10. Bxb5 Na6 11. Qe2 Nc7 12. Bd3 Bb7 13. Rd1 Qd7 14. h3 Rfb8 15. Bf4 Ba6 16. Bxa6 Nxa6 17. e5 Ne8 18. Rab1 Rb4 19. Bg3 Qb7 20. Ne4 Nac7 21. a3 Rb6 22. Qc4 Qa6 23. Qxa6 1/2-1/2

[Event "GER-chT Betriebe 18th"]
[Site "Altenberg Zinnwald"]
[Date "2018.11.08"]
[Round "2.3"]
[White "Baranowsky, Peter"]
[Black "Dekker, Derk"]
[Result "0-1"]
[ECO "C54"]
[WhiteElo "1867"]
[BlackElo "1855"]
[PlyCount "72"]
[EventDate "2018.11.08"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Berlin Tempelhof"]
[BlackTeam "Muenchen EPA"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nf3 Bc5 5. c3 Bb6 6. Bb3 d6 7. h3 0-0 8. 0-0 Ne7 9. Re1 Ng6 10. Nbd2 c6 11. Nf1 h6 12. Ng3 Kh7 13. Nh2 Be6 14. Qf3 Qd7 15. Bd1 Nh4 16. Qe2 Bxh3 17. Nh5 Nxh5 18. Qxh5 Nxg2 19. Ng4 Qe6 20. Qxh3 Nxe1 21. Bd2 f5 22. Nh2 Bxf2+ 23. Kxf2 fxe4+ 24. Kg3 Qxh3+ 25. Kxh3 Nxd3 26. Be3 Nf2+ 27. Kg2 Nxd1 28. Rxd1 d5 29. Ng4 Rf5 30. Rh1 b6 31. Nxh6 gxh6 32. Rxh6+ Kg7 33. Rxc6 Rg8 34. Rh6 Kf7+ 35. Kh2 Rf3 36. Bg1 e3 0-1

[Event "GER-chT Betriebe 18th"]
[Site "Altenberg Zinnwald"]
[Date "2018.11.08"]
[Round "1.3"]
[White "Dekker, Derk"]
[Black "Meseck, Michael"]
[Result "1-0"]
[ECO "D52"]
[WhiteElo "1855"]
[BlackElo "1545"]
[PlyCount "71"]
[EventDate "2018.11.08"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Muenchen EPA"]
[BlackTeam "Berlin Tempelhof II"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c6 5. Bg5 Nbd7 6. e3 Qa5 7. Nd2 Bb4 8. Qc2 dxc4 9. Bxf6 Nxf6 10. Bxc4 0-0 11. 0-0 b5 12. Bd3 Bb7 13. Nb3 Qd8 14. Ne4 Nxe4 15. Bxe4 f5 16. Bf3 Rc8 17. Nc5 Bxc5 18. Qxc5 a5 19. Rfc1 Qd7 20. a4 Rfd8 21. Qb6 bxa4 22. Qxa5 Ra8 23. Qc5 Ra6 24. Be2 Raa8 25. Qb6 Rdb8 26. Qc5 Qc7 27. Qc4 Ba6 28. Qxe6+ Kh8 29. Bf3 Rxb2 30. Rxc6 Qa5 31. Rc5 Qd2 32. Bxa8 Qxf2+ 33. Kh1 h6 34. Rxf5 Ra2 35. Rg1 Qe2 36. Rf8+ 1-0

[Event "Groningen Combinatie op"]
[Site "Groningen"]
[Date "2017.05.28"]
[Round "7"]
[White "Dekker, Derk"]
[Black "Hummel, Erik Jan"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "1812"]
[BlackElo "2291"]
[PlyCount "126"]
[EventDate "2017.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. d4 Nf6 2. Bf4 c5 3. d5 d6 4. Nc3 e5 5. Bg5 Be7 6. Bxf6 Bxf6 7. e4 0-0 8. Be2 a6 9. a4 g6 10. g4 Bh4 11. Qd3 f5 12. gxf5 gxf5 13. Nf3 f4 14. Nb1 Kh8 15. Rg1 Nd7 16. Nbd2 Be7 17. Nc4 Nb6 18. Ncd2 Bd7 19. a5 Nc8 20. Qc3 b5 21. axb6 Nxb6 22. b3 a5 23. Rxa5 Nxd5 24. Rxa8 Nxc3 25. Rxd8 Rxd8 26. Ng5 Bxg5 27. Rxg5 Ra8 28. f3 Ra1+ 29. Kf2 Nxe2 30. Kxe2 Bb5+ 31. c4 Be8 32. Rg2 Bg6 33. Rf2 Kg7 34. Rf1 Ra2 35. Kd3 Kf6 36. h4 Kg7 37. Kc3 Kh6 38. Kd3 Kh5 39. Rh1 Bf7 40. Kc3 Ra8 41. Kd3 Be6 42. Rh2 Rg8 43. Nf1 Rg1 44. Ke2 Rg7 45. Kd3 Ra7 46. Nd2 Ra1 47. Ke2 Rc1 48. Rg2 Kh6 49. Rh2 Bf7 50. Kd3 Bh5 51. Ke2 Kg7 52. Kf2 Kf6 53. Ke2 Rg1 54. Kf2 Rg3 55. Rh1 Ke6 56. Rh2 Kd7 57. Rh1 Kc6 58. Ra1 Kb7 59. Rh1 Kb6 60. Ra1 Rh3 61. Ra3 Rh2+ 62. Ke1 Rxh4 63. Ra8 Rh1+ 0-1

[Event "Groningen Combinatie op"]
[Site "Groningen"]
[Date "2017.05.27"]
[Round "4"]
[White "Hoeksema, Hendrik Pieter"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "A81"]
[WhiteElo "2343"]
[BlackElo "1812"]
[PlyCount "43"]
[EventDate "2017.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. Nf3 f5 2. b3 Nf6 3. Bb2 d6 4. d4 e6 5. g3 Be7 6. Bg2 0-0 7. 0-0 Ne4 8. Nbd2 Nxd2 9. Qxd2 Nd7 10. Qd3 Nf6 11. Nd2 d5 12. f3 Nh5 13. Rfe1 Bd6 14. e4 g5 15. c4 c6 16. cxd5 exd5 17. exd5 Nf6 18. dxc6 Bc7 19. cxb7 Bxb7 20. Qxf5 Qd5 21. Qxd5+ Nxd5 22. Nc4 1-0

[Event "Groningen Combinatie op"]
[Site "Groningen"]
[Date "2017.05.26"]
[Round "2"]
[White "Clemens, Adrian HP"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "A96"]
[WhiteElo "2201"]
[BlackElo "1812"]
[PlyCount "57"]
[EventDate "2017.05.25"]
[EventType "swiss"]
[EventRounds "7"]
[EventCountry "NED"]
[SourceTitle "CBM 178 Extra"]
[Source "ChessBase"]
[SourceDate "2017.06.22"]
[SourceVersion "1"]
[SourceVersionDate "2017.06.22"]
[SourceQuality "1"]

1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nf3 Be7 5. c4 d6 6. 0-0 0-0 7. Nc3 Ne4 8. Nxe4 fxe4 9. Nd2 d5 10. f3 e3 11. Nb1 c5 12. Bxe3 Nc6 13. cxd5 exd5 14. dxc5 Be6 15. Nd2 d4 16. Bf2 Bxc5 17. Qa4 Bb6 18. Nc4 Bc7 19. e4 dxe3 20. Nxe3 Qf6 21. f4 Rfd8 22. Qb5 Bb6 23. Nd5 Bxd5 24. Bxd5+ Kh8 25. Rad1 Nd4 26. Bxd4 Bxd4+ 27. Kh1 Rd6 28. Rfe1 Rdd8 29. Re6 1-0

[Event "Reykjavik op"]
[Site "Reykjavik"]
[Date "2016.03.16"]
[Round "10"]
[White "Steingrimsson, Karl Egill"]
[Black "Dekker, Derk"]
[Result "1/2-1/2"]
[ECO "A80"]
[WhiteElo "1693"]
[BlackElo "1861"]
[PlyCount "62"]
[EventDate "2016.03.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ISL"]
[SourceTitle "CBM 171 Extra"]
[Source "ChessBase"]
[SourceDate "2016.04.26"]
[SourceVersion "1"]
[SourceVersionDate "2016.04.26"]
[SourceQuality "1"]

1. d4 f5 2. Nc3 d5 3. Nf3 Nf6 4. Bg5 e6 5. e3 Be7 6. h4 Ne4 7. Nxe4 fxe4 8. Bxe7 Qxe7 9. Ne5 0-0 10. c3 Nd7 11. f4 c5 12. g4 cxd4 13. Qxd4 Nxe5 14. Qxe5 Qf6 15. Qxf6 Rxf6 16. g5 Rf8 17. Bh3 e5 18. fxe5 Bxh3 19. Rxh3 Rae8 20. Ke2 Kf7 21. Rh2 Ke6 22. Rf1 Kxe5 23. Rhf2 Rxf2+ 24. Rxf2 Ke6 25. Rf4 b5 26. a3 a5 27. Kd2 Rc8 28. Rf1 Ke7 29. Ke2 Rb8 30. Kd2 Rc8 31. Kc2 Ke6 1/2-1/2

[Event "Reykjavik op"]
[Site "Reykjavik"]
[Date "2016.03.15"]
[Round "9"]
[White "Dekker, Derk"]
[Black "Jonasson, Hordur"]
[Result "1-0"]
[ECO "C66"]
[WhiteElo "1861"]
[BlackElo "1536"]
[PlyCount "37"]
[EventDate "2016.03.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ISL"]
[SourceTitle "CBM 171 Extra"]
[Source "ChessBase"]
[SourceDate "2016.04.26"]
[SourceVersion "1"]
[SourceVersionDate "2016.04.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 d6 5. d4 exd4 6. Nxd4 Bd7 7. Nxc6 Bxc6 8. Bxc6+ bxc6 9. 0-0 Be7 10. Be3 0-0 11. f4 Qd7 12. h3 g6 13. Qf3 Ne8 14. f5 Bf6 15. Bh6 Ng7 16. g4 Bd4+ 17. Kg2 f6 18. Ne2 Bxb2 19. Qb3+ 1-0

[Event "Reykjavik op"]
[Site "Reykjavik"]
[Date "2016.03.14"]
[Round "8"]
[White "Ingebretsen, Jens E"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "1755"]
[BlackElo "1861"]
[PlyCount "41"]
[EventDate "2016.03.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ISL"]
[SourceTitle "CBM 171 Extra"]
[Source "ChessBase"]
[SourceDate "2016.04.26"]
[SourceVersion "1"]
[SourceVersionDate "2016.04.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nf6 3. Nxe5 Nxe4 4. Qe2 Qe7 5. Qxe4 d6 6. d4 dxe5 7. dxe5 Nc6 8. Nc3 Qxe5 9. Qxe5+ Nxe5 10. Nb5 Kd8 11. Bf4 f6 12. 0-0-0+ Bd7 13. Be2 a6 14. Bxe5 axb5 15. Bg4 fxe5 16. Rxd7+ Ke8 17. Rxc7 Rxa2 18. Kb1 Ra4 19. Be2 Ra5 20. Rxb7 Be7 21. Rb8+ 1-0

[Event "Reykjavik op"]
[Site "Reykjavik"]
[Date "2016.03.13"]
[Round "7"]
[White "Dekker, Derk"]
[Black "Raddatz, Michael"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "1861"]
[BlackElo "2023"]
[PlyCount "48"]
[EventDate "2016.03.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ISL"]
[SourceTitle "CBM 171 Extra"]
[Source "ChessBase"]
[SourceDate "2016.04.26"]
[SourceVersion "1"]
[SourceVersionDate "2016.04.26"]
[SourceQuality "1"]

1. e4 c5 2. Nf3 Nc6 3. Bb5 Nd4 4. Nxd4 cxd4 5. 0-0 Nf6 6. Re1 Qa5 7. Bf1 e6 8. c3 Qe5 9. d3 Bc5 10. Qf3 0-0 11. Be2 d5 12. Bd1 dxe4 13. dxe4 Bd6 14. g3 Nd7 15. Bf4 Qc5 16. Bxd6 Qxd6 17. Qd3 e5 18. cxd4 exd4 19. f4 Nc5 20. Qd2 Rd8 21. Na3 d3 22. Kg2 Qd4 23. Bf3 Bd7 24. Qe3 Qxb2+ 0-1

[Event "Reykjavik op"]
[Site "Reykjavik"]
[Date "2016.03.11"]
[Round "5"]
[White "Edel, Thomas"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "A96"]
[WhiteElo "2127"]
[BlackElo "1861"]
[PlyCount "63"]
[EventDate "2016.03.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ISL"]
[SourceTitle "CBM 171 Extra"]
[Source "ChessBase"]
[SourceDate "2016.04.26"]
[SourceVersion "1"]
[SourceVersionDate "2016.04.26"]
[SourceQuality "1"]

1. d4 f5 2. Nf3 Nf6 3. g3 e6 4. Bg2 Be7 5. 0-0 0-0 6. c4 d6 7. Nc3 Ne4 8. Qc2 Nxc3 9. bxc3 Nc6 10. Rb1 e5 11. d5 Na5 12. c5 e4 13. cxd6 Bxd6 14. Nd4 b6 15. c4 Qe7 16. Bd2 Nb7 17. Nc6 Qe8 18. Bf4 Bd7 19. Bxd6 cxd6 20. f3 exf3 21. Rxf3 Nc5 22. Rbf1 Kh8 23. g4 f4 24. h3 h5 25. gxh5 Qxh5 26. Rxf4 Rxf4 27. Rxf4 Qg5 28. e3 Bxh3 29. Qf2 Qxg2+ 30. Qxg2 Bxg2 31. Kxg2 Kg8 32. Ne7+ 1-0

[Event "Reykjavik op"]
[Site "Reykjavik"]
[Date "2016.03.10"]
[Round "4"]
[White "Dekker, Derk"]
[Black "Heidarsson, Arnar Milutin"]
[Result "1-0"]
[ECO "A03"]
[WhiteElo "1861"]
[BlackElo "1333"]
[PlyCount "51"]
[EventDate "2016.03.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ISL"]
[SourceTitle "CBM 171 Extra"]
[Source "ChessBase"]
[SourceDate "2016.04.26"]
[SourceVersion "1"]
[SourceVersionDate "2016.04.26"]
[SourceQuality "1"]

1. f4 d5 2. Nf3 g6 3. e3 Bg7 4. Be2 Nf6 5. 0-0 0-0 6. Nc3 b6 7. a4 a6 8. a5 b5 9. d4 Nc6 10. Bd3 Nb4 11. Ne5 Nd7 12. Na2 Nxa2 13. Rxa2 Bxe5 14. fxe5 c5 15. c3 c4 16. Bb1 Nb8 17. e4 e6 18. Bh6 Re8 19. Qf3 Ra7 20. Qg3 Nd7 21. Bg5 Qc7 22. Qh4 Nf8 23. Bf6 h5 24. Qg5 Kh7 25. exd5 exd5 26. Qxh5+ 1-0

[Event "Reykjavik op"]
[Site "Reykjavik"]
[Date "2016.03.09"]
[Round "3"]
[White "Riccardi, Thomas H"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "2135"]
[BlackElo "1861"]
[PlyCount "141"]
[EventDate "2016.03.08"]
[EventType "swiss"]
[EventRounds "10"]
[EventCountry "ISL"]
[SourceTitle "CBM 171 Extra"]
[Source "ChessBase"]
[SourceDate "2016.04.26"]
[SourceVersion "1"]
[SourceVersionDate "2016.04.26"]
[SourceQuality "1"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. c3 Bd7 6. Ba4 g6 7. Nbd2 Bg7 8. Nf1 0-0 9. Ng3 Re8 10. 0-0 a6 11. h3 Na5 12. Bc2 c5 13. a4 b6 14. Re1 Qc7 15. b4 Nc6 16. Bd2 cxb4 17. cxb4 b5 18. a5 Rac8 19. Bb3 Be6 20. Rc1 Qd7 21. Bxe6 Qxe6 22. Rb1 d5 23. Bc3 h6 24. Qe2 dxe4 25. dxe4 Red8 26. Qe3 Rb8 27. Nf1 Ne8 28. N1d2 Nd6 29. Rec1 Kh7 30. Qe2 Nd4 31. Bxd4 exd4 32. Rc6 Ra8 33. e5 Qe8 34. Rc7 Nf5 35. Rbc1 Rd7 36. g4 Ne7 37. Qe4 Rad8 38. e6 fxe6 39. Qxe6 Rxc7 40. Rxc7 Nd5 41. Qxe8 Rxe8 42. Rd7 Nxb4 43. Nxd4 Kg8 44. Kg2 Re1 45. Rd8+ Kf7 46. Rd7+ Re7 47. Rd6 Bxd4 48. Rxd4 Nc6 49. Rf4+ Kg7 50. Nb3 Re2 51. Nc5 b4 52. Rc4 Nxa5 53. Rxb4 Ra2 54. Nxa6 Nc6 55. Rb7+ Kg8 56. Nc5 Ne5 57. Re7 Nf7 58. Ne6 Ra6 59. Kg3 g5 60. Nd4 Kg7 61. h4 Ra3+ 62. f3 Ra4 63. Re4 Kf6 64. Re6+ Kg7 65. Nf5+ Kh7 66. Rf6 Ra7 67. h5 Rb7 68. Rg6 Rd7 69. Nxh6 Nxh6 70. Rxg5 Rd6 71. Ra5 1-0

[Event "GER-chT Betriebe 15th"]
[Site "Munich"]
[Date "2015.10.25"]
[Round "7.3"]
[White "Mueller, Gerd"]
[Black "Dekker, Derk"]
[Result "1/2-1/2"]
[ECO "C49"]
[WhiteElo "1820"]
[PlyCount "22"]
[EventDate "2015.10.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Berlin Osram"]
[BlackTeam "Muenchen EPA III"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. Bxc6 dxc6 6. Nxe5 Qe7 7. Nf3 Bxc3 8. dxc3 Qxe4+ 9. Qe2 Bf5 10. Qxe4+ Bxe4 11. Nd4 0-0-0 1/2-1/2

[Event "GER-chT Betriebe 15th"]
[Site "Munich"]
[Date "2015.10.24"]
[Round "5.3"]
[White "Kolb, Wolfgang"]
[Black "Dekker, Derk"]
[Result "1/2-1/2"]
[ECO "A29"]
[WhiteElo "2058"]
[PlyCount "62"]
[EventDate "2015.10.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Augsburg Osram II"]
[BlackTeam "Muenchen EPA III"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Ne7 6. Nf3 Nbc6 7. a3 g6 8. b4 a6 9. Bb2 Bg7 10. d3 0-0 11. 0-0 h6 12. Rc1 Be6 13. Ne4 b6 14. Ned2 Qd7 15. Ba1 Bh3 16. Nc4 Bxg2 17. Kxg2 Qe6 18. Qd2 Rad8 19. Qb2 Nf5 20. Qc2 Ncd4 21. Nxd4 exd4 22. Rfe1 h5 23. e4 dxe3 24. Bxg7 Qd5+ 25. f3 Kxg7 26. Nxe3 Nxe3+ 27. Rxe3 Rd7 28. Qc4 Qb7 29. Kf2 Rc8 30. Qc6 Qxc6 31. Rxc6 Rd6 1/2-1/2

[Event "GER-chT Betriebe 15th"]
[Site "Munich"]
[Date "2015.10.23"]
[Round "4.3"]
[White "Dekker, Derk"]
[Black "Mueller, Joerg"]
[Result "0-1"]
[ECO "A08"]
[BlackElo "2112"]
[PlyCount "62"]
[EventDate "2015.10.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Muenchen EPA III"]
[BlackTeam "Hamburg Rapid Unilever"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e6 2. d3 d5 3. Nd2 c5 4. Ngf3 Nc6 5. g3 Nf6 6. Bg2 Bd6 7. 0-0 d4 8. Nh4 e5 9. h3 0-0 10. Nc4 Bc7 11. a4 Be6 12. b3 Re8 13. Bd2 h6 14. Qf3 Nb4 15. Rfc1 Nh7 16. Kh2 Ng5 17. Qh5 Nh7 18. Nf5 Bxf5 19. exf5 Nf6 20. Qh4 Rb8 21. Bxb4 cxb4 22. Re1 a6 23. a5 Qd7 24. Be4 Bd8 25. Ra4 Qc7 26. Bg2 Qc5 27. Kh1 e4 28. Qf4 Bc7 29. Qd2 e3 30. fxe3 Bxg3 31. Re2 Qxf5 0-1

[Event "GER-chT Betriebe 15th"]
[Site "Munich"]
[Date "2015.10.23"]
[Round "3.3"]
[White "Hielscher, Klaus Peter"]
[Black "Dekker, Derk"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "1727"]
[PlyCount "80"]
[EventDate "2015.10.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Essen RWE"]
[BlackTeam "Muenchen EPA III"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. c4 e5 2. Nc3 Nf6 3. g3 d5 4. cxd5 Nxd5 5. Bg2 Ne7 6. Nf3 Nbc6 7. d3 g6 8. Bg5 h6 9. Bf6 Rg8 10. Nxe5 Qd4 11. Nxc6 Qxf6 12. Nxe7 Qxe7 13. Rc1 c6 14. 0-0 Be6 15. Qa4 Bd7 16. Ne4 Bg7 17. Qb3 Rb8 18. Nc5 Be5 19. e3 Kf8 20. f4 Bd6 21. Nxd7+ Qxd7 22. e4 Kg7 23. Qc3+ Kh7 24. f5 Rbe8 25. Rc2 c5 26. fxg6+ fxg6 27. Rcf2 Re7 28. Qc4 Rgg7 29. Rf8 Be5 30. Kh1 Bd4 31. Ra8 b5 32. Qb3 Rgf7 33. Rf8 Rg7 34. Qd1 Bxb2 35. Ra8 Rgf7 36. Rf8 Bg7 37. R8xf7 Rxf7 38. Rxf7 Qxf7 39. Qg4 Qxa2 40. Qc8 Qb1+ 0-1

[Event "GER-chT Betriebe 15th"]
[Site "Munich"]
[Date "2015.10.23"]
[Round "6.2"]
[White "Reinemann, Guenter"]
[Black "Dekker, Derk"]
[Result "1/2-1/2"]
[ECO "C68"]
[WhiteElo "1930"]
[PlyCount "75"]
[EventDate "2015.10.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Halle/Saale IPM"]
[BlackTeam "Muenchen EPA III"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. 0-0 Qd6 6. d4 exd4 7. Nxd4 c5 8. Nb3 Be6 9. Be3 0-0-0 10. Qxd6 cxd6 11. Nc3 Nf6 12. Rad1 b6 13. Rfe1 Be7 14. h3 Rhe8 15. Bf4 Kb7 16. Rd2 d5 17. exd5 Nxd5 18. Nxd5 Rxd5 19. Rxd5 Bxd5 20. Bd6 Be6 21. Bxe7 Rxe7 22. f3 Rd7 23. Kf2 Kc6 24. c3 Bc4 25. Re4 Kb5 26. Ke1 Bd3 27. Re5 f6 28. Re3 a5 29. Nd2 f5 30. Re6 a4 31. c4+ Ka5 32. a3 Bc2 33. Re8 Ka6 34. Re5 Kb7 35. f4 Bd3 36. g3 g6 37. h4 Kc6 38. Re6+ 1/2-1/2

[Event "GER-chT Betriebe 15th"]
[Site "Munich"]
[Date "2015.10.22"]
[Round "1.4"]
[White "Dekker, Derk"]
[Black "Laijh, Anton"]
[Result "1-0"]
[ECO "C53"]
[PlyCount "80"]
[EventDate "2015.10.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Muenchen EPA III"]
[BlackTeam "Muenchen ADAC II"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 h6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 d6 8. a3 Bxc3+ 9. bxc3 a6 10. 0-0 b5 11. Bb3 Nf6 12. Re1 0-0 13. h3 Re8 14. Bc2 Bb7 15. Bf4 Na5 16. Nd2 Qe7 17. Rb1 Rab8 18. Qe2 Qd7 19. Qf3 Re7 20. Bxh6 gxh6 21. Qxf6 Re6 22. Qf4 Rg6 23. Re3 Re8 24. Rg3 Rxg3 25. Qxg3+ Kh8 26. Qh4 Qe6 27. d5 Qg6 28. Rc1 Rg8 29. g3 Qg5 30. Qxg5 hxg5 31. a4 c6 32. axb5 cxb5 33. Re1 Nc4 34. Nxc4 bxc4 35. Rb1 Bc8 36. Kg2 Kg7 37. Rb6 Rh8 38. g4 Rd8 39. Rc6 Kf6 40. Rxc4 Bd7 1-0

[Event "GER-chT Betriebe 15th"]
[Site "Munich"]
[Date "2015.10.22"]
[Round "2.4"]
[White "Jermann, Frank"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "D04"]
[WhiteElo "2140"]
[PlyCount "74"]
[EventDate "2015.10.22"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Berlin Osram"]
[BlackTeam "Muenchen EPA III"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. Nf3 Nf6 3. e3 c5 4. b3 cxd4 5. exd4 Nc6 6. Bb2 Bf5 7. Bd3 Bxd3 8. Qxd3 e6 9. 0-0 Be7 10. a3 0-0 11. Nbd2 Qc7 12. Rfe1 Rac8 13. Rac1 Qa5 14. c4 Rfd8 15. c5 Qc7 16. b4 a6 17. h3 Qf4 18. Bc3 Ra8 19. a4 Bf8 20. b5 axb5 21. axb5 Ne7 22. Ra1 Nf5 23. Ne5 Rxa1 24. Bxa1 Ra8 25. g3 Qh6 26. Kg2 Ra2 27. Bc3 Ra3 28. Qc2 Nh5 29. Qb2 Ra8 30. Ndf3 f6 31. Nd7 Re8 32. Nxf8 Kxf8 33. c6 bxc6 34. bxc6 Nhxg3 35. fxg3 Ne3+ 36. Kf2 Nc4 37. Qb4+ Kg8 1-0

[Event "GER-chT Betriebe 14th"]
[Site "Dresden"]
[Date "2014.11.23"]
[Round "7.1"]
[White "Dekker, Derk"]
[Black "Schildt, Rene"]
[Result "1/2-1/2"]
[ECO "B01"]
[WhiteElo "1856"]
[BlackElo "2073"]
[PlyCount "33"]
[EventDate "2014.11.20"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Muenchen EPA"]
[BlackTeam "Berlin Tempelhof"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 d5 2. exd5 Qxd5 3. Nf3 Nc6 4. Nc3 Qd6 5. d4 Bg4 6. Be3 0-0-0 7. h3 Bxf3 8. Qxf3 Nxd4 9. Bxd4 Qxd4 10. Bd3 Qe5+ 11. Be2 Nf6 12. 0-0 e6 13. Rfe1 Qf5 14. Qe3 Bc5 15. Qg3 g6 16. Bd3 Nh5 17. Bxf5 1/2-1/2

[Event "GER-chT Betriebe 14th"]
[Site "Dresden"]
[Date "2014.11.22"]
[Round "6.1"]
[White "Meister, Jakob"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "2466"]
[BlackElo "1856"]
[PlyCount "51"]
[EventDate "2014.11.20"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Berlin President"]
[BlackTeam "Muenchen EPA"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. dxc5 Qa5+ 5. Nc3 Qxc5 6. Bxb8 Rxb8 7. Bb5+ Nd7 8. Qxd5 e6 9. Qxc5 Bxc5 10. Ne4 Be7 11. 0-0-0 a6 12. Be2 Nf6 13. Nxf6+ Bxf6 14. Nf3 Bd7 15. Nd2 g6 16. Ne4 Bg7 17. Nc5 Bc6 18. Bf3 Bxf3 19. gxf3 a5 20. Rd3 b6 21. Ne4 Ke7 22. Rhd1 Rb7 23. Nd6 Rc7 24. Nb5 Rb7 25. a4 Rc8 26. Nd6 1-0

[Event "GER-chT Betriebe 14th"]
[Site "Dresden"]
[Date "2014.11.21"]
[Round "3.1"]
[White "Dekker, Derk"]
[Black "Schmitzer, Klaus"]
[Result "0-1"]
[ECO "B16"]
[WhiteElo "1856"]
[BlackElo "2271"]
[PlyCount "83"]
[EventDate "2014.11.20"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Muenchen EPA"]
[BlackTeam "Frankfurt AGI"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 6. Bf4 Qb6 7. Rb1 Qa5+ 8. c3 Qxa2 9. Nf3 Bf5 10. Bd3 Qe6+ 11. Be3 Bxd3 12. Qxd3 Qg4 13. 0-0 Rg8 14. Ne1 Qg6 15. f4 Qxd3 16. Nxd3 f5 17. b4 a6 18. Nc5 b6 19. Nd3 e6 20. Ne5 Bd6 21. c4 f6 22. Nd3 Bc7 23. Rfe1 Kf7 24. Ra1 Nd7 25. Ra2 Rgb8 26. Rea1 a5 27. c5 bxc5 28. Nxc5 Nxc5 29. bxc5 e5 30. fxe5 fxe5 31. dxe5 Bxe5 32. Rf1 Kg6 33. Bf4 Bd4+ 34. Kh1 Rb5 35. Re2 Rxc5 36. Re6+ Kf7 37. Rfe1 Bf6 38. Rd6 Rd8 39. Rde6 Rd7 40. h3 Rc4 41. Bh6 Bh4 42. R1e3 0-1

[Event "GER-chT Betriebe 14th"]
[Site "Dresden"]
[Date "2014.11.21"]
[Round "4.1"]
[White "Hohlfeld, Wolfgang"]
[Black "Dekker, Derk"]
[Result "1/2-1/2"]
[ECO "C28"]
[WhiteElo "2102"]
[BlackElo "1856"]
[PlyCount "26"]
[EventDate "2014.11.20"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Hamburg Baubehoerde"]
[BlackTeam "Muenchen EPA"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 e5 2. Nc3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. Be3 d6 6. Bxc5 dxc5 7. Nf3 Qe7 8. h3 a6 9. a3 Be6 10. Bxe6 Qxe6 11. Qd2 h6 12. b3 Qe7 13. Ne2 Nh5 1/2-1/2

[Event "GER-chT Betriebe 14th"]
[Site "Dresden"]
[Date "2014.11.20"]
[Round "1.1"]
[White "Dekker, Derk"]
[Black "Schmidt, Harald"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "1856"]
[BlackElo "2364"]
[PlyCount "100"]
[EventDate "2014.11.20"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Muenchen EPA"]
[BlackTeam "Hamburg Transit"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. e4 d6 2. d4 Nf6 3. Nc3 c6 4. f4 Qa5 5. Bd3 e5 6. dxe5 dxe5 7. fxe5 Ng4 8. Nf3 Be6 9. h3 Nxe5 10. Nxe5 Qxe5 11. Qf3 Bd6 12. Be3 Nd7 13. Ne2 Bc5 14. c3 Bxe3 15. Qxe3 Nc5 16. 0-0 0-0 17. Nd4 Rae8 18. Bc2 Bc8 19. Rae1 a5 20. Rf4 Ne6 21. Rf5 Qc7 22. Rh5 Nxd4 23. cxd4 g6 24. e5 f5 25. Bb3+ Be6 26. Bxe6+ Rxe6 27. Rh4 Rfe8 28. Rc1 Qb6 29. Qb3 Qxb3 30. axb3 Kg7 31. Rf4 Rd8 32. Rc3 Rd5 33. Rd3 Rb5 34. Rdf3 c5 35. Rc3 cxd4 36. Rc7+ Kf8 37. Rxd4 Re7 38. Rd8+ Kf7 39. Rh8 Rxc7 40. Rxh7+ Ke6 41. Rxc7 Rxb3 42. Rg7 Rxb2 43. h4 a4 44. Rxg6+ Kxe5 45. h5 a3 46. h6 a2 47. h7 a1Q+ 48. Kh2 Kf4 49. Rg8 Rb1 50. h8Q Rh1# 0-1

[Event "GER-chT Betriebe 14th"]
[Site "Dresden"]
[Date "2014.11.20"]
[Round "2.1"]
[White "Wirth, Volker"]
[Black "Dekker, Derk"]
[Result "0-1"]
[ECO "D08"]
[WhiteElo "1717"]
[BlackElo "1856"]
[PlyCount "28"]
[EventDate "2014.11.20"]
[EventType "team-swiss"]
[EventRounds "7"]
[EventCountry "GER"]
[SourceTitle "EXT 2020"]
[Source "ChessBase"]
[SourceDate "2019.10.17"]
[SourceVersion "1"]
[SourceVersionDate "2019.10.17"]
[SourceQuality "1"]
[WhiteTeam "Stuttgart Sparkassen-Vers II"]
[BlackTeam "Muenchen EPA"]
[WhiteTeamCountry "GER"]
[BlackTeamCountry "GER"]

1. d4 d5 2. c4 e5 3. dxe5 d4 4. e3 Bb4+ 5. Bd2 dxe3 6. fxe3 Bxd2+ 7. Nxd2 Qg5 8. Qb3 Qxe5 9. Ngf3 Qe7 10. Be2 Nf6 11. 0-0 0-0 12. Bd3 Rd8 13. Rfe1 Nbd7 14. Rac1 Nc5 0-1

[Event "Leiden LCT op-A 4th"]
[Site "Leiden"]
[Date "2010.07.15"]
[Round "6"]
[White "Both, Gert"]
[Black "Dekker, Derk"]
[Result "1-0"]
[ECO "D26"]
[WhiteElo "1995"]
[PlyCount "47"]
[EventDate "2010.07.09"]
[EventType "swiss"]
[EventRounds "9"]
[EventCountry "NED"]
[SourceTitle "CBM 137 Extra"]
[Source "ChessBase"]
[SourceDate "2010.09.01"]
[SourceVersion "1"]
[SourceVersionDate "2010.09.01"]
[SourceQuality "1"]

1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 Be7 6. 0-0 0-0 7. Qe2 Nbd7 8. Rd1 c6 9. Nc3 Qc7 10. b3 e5 11. Bb2 e4 12. Ng5 b5 13. Bxf7+ Rxf7 14. Nxf7 Kxf7 15. d5 b4 16. d6 Bxd6 17. Qc4+ Kf8 18. Nxe4 Ne5 19. Qd4 Nxe4 20. Qxe4 Ng6 21. h4 Kg8 22. Rac1 Bh2+ 23. Kh1 Bb7 24. Qe6+ 1-0

