Player profile
Van der Werf, Mark
Dossier
99 of 110 games analyzed.
Accuracy: 92.8%
Opened d4: 40/46Opened c4: 4/46Opened e4: 1/46Opened Nf3: 1/46
Castled kingside: 78Same-side castling: 73Castled queenside: 5Opposite-side castling: 4Did not castle: 4
Played in the center: 31Played on the kingside: 22Played on the queenside: 21Fianchettoed kingside: 18Fianchettoed queenside: 17
Active pieces: 64Kept the bishop pair: 52Initiated exchanges: 50Space advantage: 49Sacrificed material: 46Isolated pawn: 43Backward pawn: 35Missed tactics: 20Avoided exchanges: 18Accepted short draws: 12
Openings
Click "+" to add that group to the games list below. Multiple groups can be added at once.
As White 52 games 21W 25D 6L
Nimzo-Indian Defense 10 games 2W 6D 2L
Normal Variation 5 games 1W 2D 2L
Botvinnik System
2 games
0W
1D
1L
Gligoric System
1 game
0W
1D
0L
(unspecified)
1 game
1W
0D
0L
Gligoric System, Exchange Variation
1 game
0W
0D
1L
St. Petersburg Variation 3 games 1W 2D 0L
Fischer Variation
2 games
0W
2D
0L
American Variation
1 game
1W
0D
0L
Rubinstein System 2 games 0W 2D 0L
Rubinstein Variation
1 game
0W
1D
0L
Hübner Variation
1 game
0W
1D
0L
Queen's Gambit Declined 10 games 4W 6D 0L
Exchange Variation 5 games 3W 2D 0L
Positional Variation
4 games
3W
1D
0L
Reshevsky Variation
1 game
0W
1D
0L
Modern Variation 3 games 0W 3D 0L
(unspecified)
3 games
0W
3D
0L
Orthodox Defense 1 game 0W 1D 0L
Swiss, Carlsbad Variation
1 game
0W
1D
0L
Janowski Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
King's Indian Defense 6 games 3W 3D 0L
Orthodox Variation 5 games 3W 2D 0L
Gligoric-Taimanov System
4 games
3W
1D
0L
Glek Defense
1 game
0W
1D
0L
Normal Variation 1 game 0W 1D 0L
Rare Defenses
1 game
0W
1D
0L
Slav Defense 5 games 2W 3D 0L
(unspecified) 3 games 1W 2D 0L
(unspecified)
3 games
1W
2D
0L
Exchange Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Modern Line 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Benoni Defense 3 games 2W 1D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Czech Benoni Defense 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Old Benoni 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Grünfeld Defense 2 games 1W 1D 0L
Exchange Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Three Knights Variation 1 game 1W 0D 0L
Petrosian System
1 game
1W
0D
0L
English Opening 2 games 0W 1D 1L
King's English Variation 2 games 0W 1D 1L
Four Knights Variation, Fianchetto Line, with Nb6
1 game
0W
1D
0L
Four Knights Variation, Fianchetto Line
1 game
0W
0D
1L
Tarrasch Defense 2 games 1W 1D 0L
Two Knights Variation 2 games 1W 1D 0L
(unspecified)
2 games
1W
1D
0L
Benko Gambit Accepted 2 games 1W 0D 1L
Modern Variation 2 games 1W 0D 1L
(unspecified)
2 games
1W
0D
1L
Queen's Gambit Accepted 2 games 1W 1D 0L
Normal Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Classical Defense 1 game 0W 1D 0L
Russian Gambit
1 game
0W
1D
0L
Indian Defense 1 game 1W 0D 0L
Budapest Gambit Accepted 1 game 1W 0D 0L
Fajarowicz Defense, Bonsdorf Variation
1 game
1W
0D
0L
Wade Defense 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Four Knights Game 1 game 0W 1D 0L
Scotch Variation Accepted 1 game 0W 1D 0L
Main Line
1 game
0W
1D
0L
Zukertort Opening 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Pirc Defense 1 game 0W 0D 1L
Classical Variation 1 game 0W 0D 1L
Quiet System
1 game
0W
0D
1L
Dutch Defense 1 game 0W 1D 0L
Classical Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Polish Defense 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Slav Indian 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
As Black 46 games 15W 21D 10L
Ruy Lopez 9 games 2W 7D 0L
Closed 6 games 2W 4D 0L
Pilnik Variation
1 game
1W
0D
0L
Delayed Exchange
1 game
0W
1D
0L
Martinez Variation
1 game
0W
1D
0L
Anti-Marshall
1 game
0W
1D
0L
Zaitsev System
1 game
0W
1D
0L
Smyslov-Breyer-Zaitsev Hybrid
1 game
1W
0D
0L
Morphy Defense 3 games 0W 3D 0L
Anderssen Variation
2 games
0W
2D
0L
Duras Variation
1 game
0W
1D
0L
Italian Game 6 games 0W 3D 3L
Giuoco Pianissimo 3 games 0W 2D 1L
Italian Four Knights Variation
2 games
0W
1D
1L
Normal
1 game
0W
1D
0L
Two Knights Defense 2 games 0W 0D 2L
Modern Bishop's Opening
1 game
0W
0D
1L
Polerio Defense, Bishop Check Line
1 game
0W
0D
1L
Classical Variation 1 game 0W 1D 0L
Giuoco Pianissimo, Albin Variation
1 game
0W
1D
0L
Benoni Defense 6 games 1W 3D 2L
Fianchetto Variation 2 games 1W 1D 0L
(unspecified)
2 games
1W
1D
0L
Classical Variation 2 games 0W 2D 0L
New York Variation
1 game
0W
1D
0L
Czerniak Defense, Tal Line
1 game
0W
1D
0L
Knight's Tour Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
(unspecified) 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Nimzo-Indian Defense 3 games 1W 2D 0L
Kmoch Variation 2 games 0W 2D 0L
(unspecified)
2 games
0W
2D
0L
Classical Variation 1 game 1W 0D 0L
Noa Variation
1 game
1W
0D
0L
Indian Defense 3 games 2W 0D 1L
Pseudo-Benko 2 games 1W 0D 1L
(unspecified)
2 games
1W
0D
1L
Spielmann-Indian 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Queen's Pawn Game 3 games 1W 2D 0L
Colle System 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Zukertort Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
London System 1 game 1W 0D 0L
with e6
1 game
1W
0D
0L
Blumenfeld Countergambit Accepted 2 games 1W 1D 0L
(unspecified) 2 games 1W 1D 0L
(unspecified)
2 games
1W
1D
0L
English Opening 2 games 1W 0D 1L
Neo-Catalan 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
King's English Variation 1 game 0W 0D 1L
Kramnik-Shirov Counterattack
1 game
0W
0D
1L
Bishop's Opening 2 games 1W 0D 1L
Vienna Hybrid 2 games 1W 0D 1L
Spielmann Attack
2 games
1W
0D
1L
Sicilian Defense 1 game 1W 0D 0L
Delayed Alapin Variation 1 game 1W 0D 0L
with e6
1 game
1W
0D
0L
Mieses Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Hungarian Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Scotch Game 1 game 1W 0D 0L
Scotch Gambit 1 game 1W 0D 0L
Advance Variation
1 game
1W
0D
0L
Zukertort Opening 1 game 1W 0D 0L
Quiet System 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Four Knights Game 1 game 0W 0D 1L
Gunsberg Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Rat Defense 1 game 0W 1D 0L
English Rat 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
Queen's Gambit Declined 1 game 0W 1D 0L
Exchange Variation 1 game 0W 1D 0L
Sämisch Variation
1 game
0W
1D
0L
Bogo-Indian Defense 1 game 0W 0D 1L
Exchange Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Vienna Game 1 game 0W 1D 0L
Vienna Gambit 1 game 0W 1D 0L
Paulsen Attack
1 game
0W
1D
0L
Blunders Top 4 of 308
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 110 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.10.31 | Round 3: Van der Werf, Mark - Slagboom, Leandro | 3.9 | 2026.10.31 Slagboom, Leandro (1065882) (2357) | ½ | 92.00% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2026.10.03 | Round 2: Van der Werf, Mark - Schoorl, Rob | 2.5 | 2026.10.03 Schoorl, Rob (1009508) (2282) | ½ | 92.20% | 1. d4 d5 2. c4 c6 3. cxd5 cxd5 | |
| 2026.09.19 | Round 1: Dreelinck, Jacob - Van der Werf, Mark | 1.3 | 2026.09.19 Dreelinck, Jacob (250511) (2375) | ½ | - | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2026.09.03 | Round 8: Van der Werf, Mark - Pein, Malcolm | 8.14 | 2026.09.03 Pein, Malcolm (400289) (2243) | ½ | 98.50% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | |
| 2026.09.02 | Round 7: Mrva, Martin - Van der Werf, Mark | 7.10 | 2026.09.02 Mrva, Martin (14900092) (2362) | 1 | 86.70% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2026.09.01 | Round 6: Van der Werf, Mark - David, Alberto | 6.2 | 2026.09.01 David, Alberto (4000013) (2454) | ½ | 97.70% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.08.31 | Round 5: Van der Werf, Mark - Ganaus, Hannes | 5.14 | 2026.08.31 Ganaus, Hannes (1602454) (2214) | 1 | 93.80% | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2026.08.30 | Round 4: Kirszenberg, Marc - Van der Werf, Mark | 4.10 | 2026.08.30 Kirszenberg, Marc (601594) (2078) | ½ | 95.50% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.08.29 | Round 3: Van der Werf, Mark - Linik, Yaron | 3.10 | 2026.08.29 Linik, Yaron (2805995) (1932) | 1 | 94.90% | 1. d4 Nf6 2. c4 e5 3. dxe5 Ne4 | |
| 2026.08.28 | Round 2: Gormally, Daniel W - Van der Werf, Mark | 2.2 | 2026.08.28 Gormally, Daniel W (406465) (2393) | 0 | 90.00% | 1. d4 Nf6 2. Nf3 c5 3. d5 b5 | |
| 2026.08.27 | Round 1: Van der Werf, Mark - Delprato, Uberto | 1.14 | 2026.08.27 Delprato, Uberto (28522370) (2024) | 1 | 91.60% | 1. d4 d6 2. Nf3 Bg4 3. e4 Nf6 | |
| 2026.06.10 | Round 9: Delaney, John - Van der Werf, Mark | 9.10 | 2026.06.10 Delaney, John (2500060) (2054) | 1 | 89.90% | 1. d4 Nf6 2. Nf3 c5 3. d5 b5 | |
| 2026.06.09 | Round 8: Van der Werf, Mark - Dishman, Stephen | 8.8 | 2026.06.09 Dishman, Stephen (403024) (2259) | ½ | 95.50% | 1. e4 e5 2. Nf3 Nf6 3. Nc3 Nc6 | |
| 2026.06.08 | Round 7: Sielecki, Christof - Van der Werf, Mark | 7.5 | 2026.06.08 Sielecki, Christof (4620437) (2385) | ½ | 97.90% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2026.06.07 | Round 6: Van der Werf, Mark - Mannion, Stephen R | 6.8 | 2026.06.07 Mannion, Stephen R (2400111) (2220) | ½ | 94.20% | 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 | |
| 2026.06.06 | Round 5: Tocchioni, Doriano - Van der Werf, Mark | 5.10 | 2026.06.06 Tocchioni, Doriano (801887) (2119) | 1 | 97.00% | 1. d4 Nf6 2. Nf3 c5 3. g3 cxd4 | |
| 2026.06.05 | Round 4: Van der Werf, Mark - Berend, Fred | 4.5 | 2026.06.05 Berend, Fred (4000102) (2208) | 0 | 88.00% | 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 | |
| 2026.06.04 | Round 3: Van Ketel, Raoul - Van der Werf, Mark | 3.7 | 2026.06.04 Van Ketel, Raoul (1004883) (2234) | ½ | 95.10% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.06.03 | Round 2: Van der Werf, Mark - Markowski, Damian | 2.8 | 2026.06.03 Markowski, Damian (1106724) (2108) | 1 | 98.30% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2026.06.02 | Round 1: Riekenbrauk, Joerg - Van der Werf, Mark | 1.8 | 2026.06.02 Riekenbrauk, Joerg (4693264) (1941) | 1 | 96.20% | 1. e4 c5 2. Nf3 e6 3. c3 Nf6 | |
| 2026.05.24 | Tiebreak partij 4: Van der Werf, Mark - Slagboom, Leandro | 17.1 | 2026.05.24 Slagboom, Leandro (1065882) (2334) | 0 | 87.50% | 1. Nf3 Nf6 2. g3 c5 3. c4 Nc6 | |
| 2026.05.24 | Tiebreak partij 3: Slagboom, Leandro - Van der Werf, Mark | 16.1 | 2026.05.24 Slagboom, Leandro (1065882) (2334) | 0 | 84.60% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2026.05.24 | Tiebreak partij 2: Slagboom, Leandro - Van der Werf, Mark | 15.1 | 2026.05.24 Slagboom, Leandro (1065882) (2334) | 0 | 85.10% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2026.05.24 | Tiebreak partij 1: Van der Werf, Mark - Slagboom, Leandro | 14.1 | 2026.05.24 Slagboom, Leandro (1065882) (2334) | 1 | 83.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2026.05.24 | Round 13: Van der Werf, Mark - Ootes, Lars | 13.2 | 2026.05.24 Ootes, Lars (1019708) (2363) | 0 | 87.00% | 1. d4 d6 2. e4 Nf6 3. Nc3 g6 | |
| 2026.05.24 | Round 12: De Boer, Eelke - Van der Werf, Mark | 12.6 | 2026.05.24 De Boer, Eelke (1048120) (2406) | ½ | 98.10% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2026.05.24 | Round 11: Van der Werf, Mark - Jellema, Pieter | 11.3 | 2026.05.24 Jellema, Pieter (1094165) (2193) | ½ | 96.40% | 1. d4 f5 2. g3 Nf6 3. Bg2 e6 | |
| 2026.05.24 | Round 10: Den Hartog, Marijn - Van der Werf, Mark | 10.5 | 2026.05.24 Den Hartog, Marijn (1046098) (2209) | 1 | 87.90% | 1. d3 d5 2. g3 Nf6 3. Bg2 c5 | |
| 2026.05.24 | Round 9: Van der Werf, Mark - Aravindhan, Achyuth | 9.4 | 2026.05.24 Aravindhan, Achyuth (1084216) (2213) | 1 | 90.10% | 1. d4 d5 2. c4 e6 3. Nc3 c5 | |
| 2026.05.24 | Round 8: Grochal, Joey - Van der Werf, Mark | 8.1 | 2026.05.24 Grochal, Joey (1019945) (2253) | ½ | - | 1. d4 Nf6 2. c4 e6 3. Nf3 c5 | |
| 2026.05.23 | Round 7: Van der Werf, Mark - Bekker, Stefan | 7.5 | 2026.05.23 Bekker, Stefan (1022229) (2367) | ½ | 90.20% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.05.23 | Round 6: Pel, Bonno - Van der Werf, Mark | 6.3 | 2026.05.23 Pel, Bonno (1004760) (2286) | 1 | 93.90% | 1. g3 d5 2. Bg2 Nf6 3. d3 c5 | |
| 2026.05.23 | Round 5: Van der Werf, Mark - Simenon, Jozef | 5.6 | 2026.05.23 Simenon, Jozef (1012916) (2288) | 1 | - | 1. d4 b5 2. e4 a6 3. c4 Bb7 | |
| 2026.05.23 | Round 4: Kamphuis, Jasper - Van der Werf, Mark | 4.2 | 2026.05.23 Kamphuis, Jasper (1059025) (2134) | 1 | 94.40% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2026.05.23 | Round 3: Van der Werf, Mark - Terlouw, Wouter | 3.7 | 2026.05.23 Terlouw, Wouter (1087401) (2259) | ½ | 99.10% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.05.23 | Round 1: Slagboom, Leandro - Van der Werf, Mark | 1.7 | 2026.05.23 Slagboom, Leandro (1065882) (2334) | ½ | 92.80% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2026.05.19 | Round 2: Grooten, Tommy - Van der Werf, Mark | 2.1 | 2026.05.19 Grooten, Tommy (1068806) (2356) | 1 | 96.10% | 1. d4 Nf6 2. c4 e6 3. Nf3 c5 | |
| 2026.04.11 | Round 9: Jakhari, Ansh - Van der Werf, Mark | 1.5 | 2026.04.11 Jakhari, Ansh (1066005) (2252) | 1 | 97.00% | 1. Nf3 Nf6 2. e3 c5 3. b3 d5 | |
| 2026.03.28 | Round 6: Van der Werf, Mark - Maatman, Nick | 6.5 | 2026.03.28 Maatman, Nick (1040391) (2387) | ½ | 86.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.03.08 | KNSB competitie 2025/2026 | 8.9 | 2026.03.08 Bosch, Jeroen (1001280) (2407) | ½ | - | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2026.02.07 | Round 7: Dovgaliuk, Oleksandr - Van der Werf, Mark | 1.1 | 2026.02.07 Dovgaliuk, Oleksandr (14167247) (2284) | 0 | - | 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 | |
| 2025.12.26 | Round 5: Van der Werf, Mark - Donker, Roel | 1.6 | 2025.12.26 Donker, Roel (1031660) (2266) | 1 | - | 1. c4 c6 2. d4 d5 3. Nc3 Nf6 | |
| 2025.11.22 | Round 4: Lombaers, Peter - Van der Werf, Mark | 4.4 | 2025.11.22 Lombaers, Peter (1032852) (2305) | 0 | 91.40% | 1. d4 Nf6 2. c4 e6 3. Nf3 c5 | |
| 2025.11.01 | Round 11: Van der Werf, Mark - Bugayev, Vladimir | 11.8 | 2025.11.01 Bugayev, Vladimir (30901480) (2119) | 0 | 79.40% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2025.10.31 | Round 10: Farahat, Ali - Van der Werf, Mark | 10.9 | 2025.10.31 Farahat, Ali (10600507) (2309) | ½ | 96.80% | 1. d4 Nf6 2. Nf3 d5 3. e3 c5 | |
| 2025.10.30 | Round 9: Van der Werf, Mark - Lacasa Diaz, Josep Anton | 9.9 | 2025.10.30 Lacasa Diaz, Josep Anton (2203375) (2301) | ½ | 92.00% | 1. d4 d5 2. c4 e6 3. Nc3 c5 | |
| 2025.10.29 | Round 8: Martens, Martin - Van der Werf, Mark | 8.6 | 2025.10.29 Martens, Martin (1000683) (2300) | ½ | 97.00% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2025.10.28 | Round 7: Van der Werf, Mark - Georgiev, Kiril | 7.3 | 2025.10.28 Georgiev, Kiril (2900017) (2526) | ½ | 90.10% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.10.26 | Round 6: Van der Werf, Mark - Bravetti, Antonio | 6.10 | 2025.10.26 Bravetti, Antonio (823996) (2189) | 1 | 93.50% | 1. d4 Nf6 2. c4 c5 3. d5 e6 | |
| 2025.10.25 | Round 5: Van Ketel, Raoul - Van der Werf, Mark | 5.11 | 2025.10.25 Van Ketel, Raoul (1004883) (2191) | ½ | 85.30% | 1. d4 d6 2. c4 e5 3. Nc3 exd4 | |
| 2025.10.24 | Round 4: Van der Werf, Mark - Betaneli, Alexander | 4.9 | 2025.10.24 Betaneli, Alexander (2012359) (2164) | ½ | 90.50% | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2025.10.23 | Round 3: Obsivac, Josef - Van der Werf, Mark | 3.6 | 2025.10.23 Obsivac, Josef (303690) (2236) | ½ | 91.20% | 1. d4 d5 2. Nf3 e6 3. c4 c6 | |
| 2025.10.22 | Round 2: Van der Werf, Mark - Cmiel, Thorsten | 2.10 | 2025.10.22 Cmiel, Thorsten (4605721) (2167) | 1 | 98.80% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2025.10.21 | Round 1: Isaev, Yuriy V - Van der Werf, Mark | 1.13 | 2025.10.21 Isaev, Yuriy V (55781071) (2042) | 1 | 93.90% | 1. Nf3 Nf6 2. c4 e6 3. g3 d5 | |
| 2025.10.05 | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 9.3 | 2025.10.05 Oms Pallisse, Josep (2205521) (2437) | ½ | 92.20% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2025.10.04 | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 8.2 | 2025.10.04 Holzke, Frank (4600428) (2409) | ½ | 92.70% | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2025.10.03 | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 7.3 | 2025.10.03 Thorhallsson, Throstur (2300109) (2391) | ½ | 86.40% | 1. c4 e6 2. Nc3 d5 3. d4 Nf6 | |
| 2025.10.02 | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 6.2 | 2025.10.02 Sielecki, Christof (4620437) (2390) | ½ | 97.40% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2025.10.01 | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 5.2 | 2025.10.01 Fercec, Nenad (14500299) (2362) | ½ | 93.00% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2025.09.29 | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 3.3 | 2025.09.29 Cmiel, Thorsten (4605721) (2167) | 1 | 95.10% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.09.28 | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 2.6 | 2025.09.28 Farrell, Neil (2400588) (2129) | 1 | 93.70% | 1. c4 e6 2. Nc3 d5 3. d4 a6 | |
| 2025.09.27 | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 1.8 | 2025.09.27 Minnican, Alan (2400987) (2034) | 1 | 82.70% | 1. d4 Nf6 2. Bf4 d5 3. Nf3 e6 | |
| 2025.09.24 | European individual senior chess championship 2025 - Open 50+, Rabac, Croatia | 4.1 | 2025.09.24 Degraeve, Jean-Marc (600270) (2478) | ½ | 95.60% | 1. d4 d6 2. Nf3 Nf6 3. c4 g6 | |
| 2025.09.20 | Round 1: Van der Werf, Mark - Godzwon, Iwo | 1.5 | 2025.09.20 Godzwon, Iwo (21802483) (2400) | 1 | 98.20% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.05.29 | Semi-Finals | Tiebreaks: Zhu, Chenwu - Van der Werf, Mark | 2.3 | 2025.05.29 Zhu, Chenwu (1080687) (2156) | ½ | 98.30% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2025.05.29 | Finals: Van der Werf, Mark - Lombaers, Peter | 3.3 | 2025.05.29 Lombaers, Peter (1032852) (2320) | ½ | 91.60% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.05.29 | Semi-Finals: Van der Werf, Mark - Zhu, Chenwu | 1.7 | 2025.05.29 Zhu, Chenwu (1080687) (2156) | 0 | 92.20% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.05.13 | Round 9: Strating, Sybolt - Van der Werf, Mark | 1.3 | 2025.05.13 Strating, Sybolt (1002694) (2353) | ½ | - | 1. d4 Nf6 2. c4 e6 3. Nf3 c5 | |
| 2025.04.05 | Round 8: Van der Werf, Mark - Van Dael, Siem | 8.3 | 2025.04.05 Van Dael, Siem (1049771) (2271) | 1 | 94.50% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2025.03.08 | Round 7: Slagboom, Leandro - Van der Werf, Mark | 1.5 | 2025.03.08 Slagboom, Leandro (1065882) (2382) | 0 | 86.80% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2025.02.25 | WSTCC | 8.29 | 2025.02.25 Plotkin, Victor (2606674) (2259) | ½ | - | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2025.02.24 | WSTCC | 7.13 | 2025.02.24 Hjartarson, Johann (2300044) (2464) | 0 | - | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.02.23 | WSTCC | 6.17 | 2025.02.23 Bryson, Douglas M (2400073) (2295) | 0 | - | 1. e4 e5 2. Bc4 Nf6 3. d3 Bc5 | |
| 2025.02.21 | WSTCC | 5.25 | 2025.02.21 Olivier, Pierre (601829) (2152) | 1 | - | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2025.02.19 | WSTCC | 3.29 | 2025.02.19 Polak, Tomas (300560) (2463) | 0 | 97.00% | 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ | |
| 2025.02.08 | Round 6: Kunin, Vitaly - Van der Werf, Mark | 1.7 | 2025.02.08 Kunin, Vitaly (4128737) (2542) | 0 | 90.00% | 1. d4 Nf6 2. c4 e6 3. Nf3 c5 | |
| 2024.12.14 | Round 5: Sochacki, Christophe - Van der Werf, Mark | 5.6 | 2024.12.14 Sochacki, Christophe (662569) (2457) | ½ | 91.10% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2024.11.23 | KNSB Meesterklasse 2024-2025 | 4.2 | 2024.11.23 Beukema, Stefan (1024523) (2426) | ½ | 96.90% | 1. d4 d5 2. c4 c6 3. Nc3 Nf6 | |
| 2024.11.09 | Round 3: Van der Werf, Mark - Dhooge, Servaas | 3.9 | 2024.11.09 Dhooge, Servaas (268216) (2039) | 1 | 94.70% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2024.10.15 | Round 2: Van der Werf, Mark - Sekandar, Kambiz | 1.10 | 2024.10.15 Sekandar, Kambiz (11700939) (2233) | 1 | 93.60% | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 | |
| 2024.09.21 | Round 1: Van Delft, Merijn - Van der Werf, Mark | 1.2 | 2024.09.21 Van Delft, Merijn (1004670) (2364) | 1 | 95.20% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2024.09.15 | Round 9: Van der Werf, Mark - Warnier, Yanis | 9.3 | 2024.09.15 Warnier, Yanis (36084565) (2159) | 1 | 94.60% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.09.14 | Round 8: Kalosha, Zhiulien Oleksii - Van der Werf, Mark | 8.1 | 2024.09.14 Kalosha, Zhiulien Oleksii (14183706) (2232) | ½ | 94.00% | 1. d4 Nf6 2. c4 e6 3. Nf3 c5 | |
| 2024.09.13 | Round 7: Van der Werf, Mark - Soares, Luis Francisco Almeida | 7.3 | 2024.09.13 Soares, Luis (1904124) (2009) | ½ | 92.50% | 1. d4 Nf6 2. c4 c5 3. d5 e5 | |
| 2024.09.12 | Round 6: Kavutskiy, Konstantin - Van der Werf, Mark | 6.18 | 2024.09.12 Kavutskiy, Kostya (2026384) (2328) | ½ | 86.30% | 1. d4 Nf6 2. c4 e6 3. Nf3 c5 | |
| 2024.09.11 | Round 5: Van der Werf, Mark - Alsina Leal, Daniel | 5.1 | 2024.09.11 Alsina Leal, Daniel (2252627) (2487) | ½ | 97.30% | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2024.09.11 | Round 4: Van der Werf, Mark - Carnicelli, Valerio | 4.2 | 2024.09.11 Carnicelli, Valerio (856185) (2394) | 1 | 80.40% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2024.09.10 | Round 3: Kovacevic, Blazimir - Van der Werf, Mark | 3.1 | 2024.09.10 Kovacevic, Blazimir (14502712) (2376) | 0 | 90.50% | 1. c4 e5 2. Nc3 Bb4 3. Qb3 a5 | |
| 2024.09.09 | Round 2: Van der Werf, Mark - Djuric, Stefan | 2.2 | 2024.09.09 Djuric, Stefan (900133) (2208) | 1 | 94.90% | 1. d4 Nf6 2. c4 c6 3. Nc3 d5 | |
| 2024.09.08 | Round 1: Kukushkin, Ivan - Van der Werf, Mark | 1.3 | 2024.09.08 Kukushkin, Ivan (11634103) (2054) | 1 | 94.10% | 1. e4 e5 2. Nc3 Nf6 3. Bc4 Bc5 | |
| 2024.05.15 | European Senior Team Chess Championship 2024 - Section 50 + | 9.6 | 2024.05.15 Godena, Michele (800090) (2435) | ½ | 93.70% | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 | |
| 2024.05.14 | European Senior Team Chess Championship 2024 - Section 50 + | 8.18 | 2024.05.14 Beaumont, Chris R (400424) (2191) | 1 | 93.60% | 1. d4 Nf6 2. Nf3 c5 3. d5 d6 | |
| 2024.05.13 | European Senior Team Chess Championship 2024 - Section 50 + | 7.14 | 2024.05.13 Miljanic, Boro (901385) (2340) | ½ | 95.10% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2024.05.12 | European Senior Team Chess Championship 2024 - Section 50 + | 6.18 | 2024.05.12 Denk, Adolf (1600990) (2186) | 1 | 94.20% | 1. d4 c5 2. d5 e5 3. e4 Nf6 | |
| 2024.05.11 | European Senior Team Chess Championship 2024 - Section 50 + | 5.18 | 2024.05.11 Jackson, Oliver A (403156) (2069) | ½ | 96.10% | 1. e4 e5 2. Nc3 Nf6 3. f4 d5 | |
| 2024.05.10 | European Senior Team Chess Championship 2024 - Section 50 + | 4.10 | 2024.05.10 Flear, Glenn C (400165) (2392) | ½ | 98.50% | 1. d4 d5 2. c4 c6 3. Nc3 Nf6 | |
| 2024.05.09 | European Senior Team Chess Championship 2024 - Section 50 + | 3.18 | 2024.05.09 Zimmermann, Luc (1007033) (2104) | 1 | 97.60% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | |
| 2024.05.08 | European Senior Team Chess Championship 2024 - Section 50 + | 2.10 | 2024.05.08 Varga, Zoltan (700509) (2315) | ½ | 97.20% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2023.10.06 | European Chess Club Cup 2023 | 6.59 | 2023.10.06 Rademakers, Evert (1025996) (2256) | 1 | 93.40% | 1. b3 d5 2. Bb2 e6 3. Nf3 Nf6 | |
| 2023.10.03 | European Chess Club Cup 2023 | 3.70 | 2023.10.03 Boraso, Alessio (848077) (2258) | ½ | 95.90% | 1. e4 e5 2. Bc4 Nf6 3. d3 Bc5 | |
| 2023.10.01 | European Chess Club Cup 2023 | 1.46 | 2023.10.01 Favier, Alain (20670532) (2023) | ½ | 88.70% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2023.01.29 | Tata Steel Chess 2023 Qualifiers | 9.1 | 2023.01.29 Beukema, Stefan (1024523) (2411) | 0 | 89.00% | 1. f4 d5 2. Nf3 g6 3. g3 Bg7 | |
| 2023.01.28 | Tata Steel Chess 2023 Qualifiers | 8.3 | 2023.01.28 Pijpers, Arthur (1019554) (2445) | 0 | 88.10% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2023.01.27 | Tata Steel Chess 2023 Qualifiers | 7.5 | 2023.01.27 de Winter, Arthur (1069020) (2371) | ½ | 94.20% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | |
| 2023.01.25 | Tata Steel Chess 2023 Qualifiers | 6.3 | 2023.01.25 Zwirs, Nico (1036432) (2467) | 0 | 86.20% | 1. Nf3 Nf6 2. c4 b6 3. d4 Bb7 | |
| 2023.01.24 | Tata Steel Chess 2023 Qualifiers | 5.5 | 2023.01.24 Martins, Vinicius Tine (2112884) (2320) | 1 | 93.10% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2023.01.23 | Tata Steel Chess 2023 Qualifiers | 4.4 | 2023.01.23 Pham, Khoi (2353) | ½ | 88.10% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2023.01.22 | Tata Steel Chess 2023 Qualifiers | 3.1 | 2023.01.22 van Dael, Siem (1049771) (2291) | ½ | 93.20% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2023.01.21 | Tata Steel Chess 2023 Qualifiers | 2.2 | 2023.01.21 Culum, Sanjin (14420937) (2242) | 0 | 87.50% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 | |
| 2023.01.20 | Tata Steel Chess 2023 Qualifiers | 1.4 | 2023.01.20 Lopez, Jasel (15900045) (2434) | ½ | 96.10% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 |