IM Mark van der Werf Full name Mark Van der Werf Born 1968 (age 58) Place of birth Federation Netherlands Profiles #2119 World Ranking 2376 Classical 2387 Rapid 2337 Blitz Rating Bio Most Played Openings White Pieces Alapin Sicilian Defense (14 games) King's Indian Defense: Normal Variation (9 games) English Opening: Caro-Kann Defensive System (8 games) English Opening: King's English Variation (6 games) King's Indian Defense: Makogonov Variation (6 games) Black Pieces Sicilian Defense: Taimanov, Bastrikov Variation (17 games) Scandinavian Defense: Mieses-Kotrč, Main Line (17 games) Slav Defense: Modern, Triangle System (16 games) Alekhine's Defense: Modern, Larsen Variation (10 games) Queen's Gambit Declined: Semi-Slav Defense, Accelerated Move-Order (9 games) Games Players Result Moves Year Mark van der Werf (2384) Damian Markowski (2108) 1-0 123 2026 Mark van der Werf (2384) Fred Berend (2208) 0-1 56 2026 Mark van der Werf (2384) Stephen R Mannion (2220) ½-½ 37 2026 Mark van der Werf (2384) Stephen Dishman (2259) ½-½ 88 2026 Joerg Riekenbrauk (1941) Mark van der Werf (2384) 0-1 57 2026 Doriano Tocchioni (2119) Mark van der Werf (2384) 0-1 58 2026 Raoul Van Ketel (2234) Mark van der Werf (2384) ½-½ 23 2026 Christof Sielecki (2385) Mark van der Werf (2384) ½-½ 56 2026 Mark van der Werf Imanol Leorato 1-0 43 2025 Mark van der Werf (2467) Alfonso Llorente Zaro (2856) 1-0 50 2025 Show All Games