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Player profile

Koelmans, Jan Willem

Standard: 1834 Rapid: 1822 Blitz: 1894 (last updated 2026-11-02)
FIDE ID: 1011588 (view FIDE profile)
Federation: NED Sex: M Birth Year: 1960 Age: 66
Title: — Women's title: — Other title: — FOA title: —
Games: 4 Wins: 0 (0%) Draws: 2 (50%) Losses: 2 (50%)
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Dossier

4 of 4 games analyzed.

Accuracy: 84.2%
Opened d4: 3/3
Castled kingside: 3Same-side castling: 2Did not castle: 1
Played in the center: 2Played on the queenside: 2Fianchettoed kingside: 1Fianchettoed queenside: 1
Kept the bishop pair: 4Space advantage: 3Isolated pawn: 2Backward pawn: 1Played gambits: 1Sacrificed material: 1Initiated exchanges: 1Missed tactics: 1Accepted short draws: 1Active pieces: 1
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Openings

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As White 3 games 0W 2D 1L
Nimzo-Indian Defense 1 game 0W 0D 1L
Reshevsky Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Queen's Pawn Game 1 game 0W 1D 0L
Colle System 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
King's Indian Defense 1 game 0W 1D 0L
Sämisch Variation 1 game 0W 1D 0L
Sämisch Gambit 1 game 0W 1D 0L
As Black 1 game 0W 0D 1L
Sicilian Defense 1 game 0W 0D 1L
Najdorf Variation 1 game 0W 0D 1L
Main Line 1 game 0W 0D 1L
Blunders Top 4 of 14

This player's costliest moves in analyzed games. Can you find the winning move?

2024.05.12 · 16. Bc4 (−19.4% win chance) 1/2-1/2
Nobbe, Lars
Koelmans, Jan Willem
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2025.12.23 · 21. Nxd5 (−18.7% win chance) 0-1
Zecha, Oscar
Koelmans, Jan Willem
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2024.05.12 · 12... Bxf6 (−17.7% win chance) 1-0
Koelmans, Jan Willem
Ronner, Micha
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2024.05.12 · 11... Nc5 (−17.6% win chance) 1-0
Koelmans, Jan Willem
Ronner, Micha
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View blunders & mistakes
Games Showing all 4 games
Date Event Round Color Opponent Result Accuracy % First moves