KNSB FIDE
RK

Ramon Koster

Rated since April 2003

2304 Classical
2311 Rapid
2336 Blitz

RIVALRY

Nemesis
De Winter, Arthur
Games: 4 · Win rate: 0%
Easy Target
Breukelman, Jan
Games: 4 · Win rate: 75%

The good & the bad

Best wins
BREUKELMAN, JAN (FM) 2327
NK Snelschaak voor Clubteams 2025 · 2026-03-29
BREUKELMAN, JAN (FM) 2327
NK Snelschaak voor Clubteams 2025 · 2026-03-29
BREUKELMAN, JAN (FM) 2327
NK Snelschaak voor Clubteams 2025 · 2026-03-29
CAI, CHAORUO (CM) 2274
Djerba International Chess Festival 2026 Open A · 2026-02-07
WEMPE, JOOST (FM) 2212
Chessfestival Groningen 2025 Open A · 2025-12-21
Worst losses
MINDE, TIMOTHE 1880
Djerba International Chess Festival 2026 Blitz · 2026-02-11
DENNINGER, GUILHEM 2010
Djerba International Chess Festival 2026 Blitz · 2026-02-11
HAN, QIXIANG 2104
2025 XTX Markets London Chess Classic Open · 2025-11-26
MEFTAHI, HOUSSEM EDDINE (IM) 2120
Djerba International Chess Festival 2026 Blitz · 2026-02-11
CARROLL, PETER (FM) 2165
2025 XTX Markets London Chess Classic Open · 2025-11-26

FIDE Tournaments

Dutch Team Competition - klasse 1 Round 9 2026-04-11 +0–1=0 -11.2
Dutch Team Competition - klasse 1 Round 8 2026-03-07 +0–0=1 -4.2
Dutch Team Competition - klasse 1 Round 6 2026-03-28 +1–0=0 +3.4
NK Snelschaak voor Clubteams 2025 2026-03-29 +17–2=3 +122.4
Dutch Team Competition - klasse 1 Round 7 2026-02-07 +1–0=0 +7.0
Djerba International Chess Festival 2026 Open A 2026-02-07 +5–2=2 +12.8
Djerba International Chess Festival 2026 Blitz 2026-02-11 +5–4=0 -45.6
Chessfestival Groningen 2025 Open A 2025-12-21 +4–2=3 +7.6
2025 XTX Markets London Chess Classic Open 2025-11-26 +4–4=1 -16.8
Dutch Team Competition - klasse 1 Round 5 2025-12-13 +0–0=1 -2.4
Chessfestival Groningen Open A Sunday 21 December 2025 +4–2=3 +17.0
UniClass Science Park Amsterdam Schaaktoernooi Groep A Saturday 5 July 2025 +4–0=5 +51.7
HSG Open 2025 Groep A Friday 20 June 2025 +3–1=1 -1.2
Tata Steel Chess Tournament 2025 Tienkampen Friday 17 January 2025 +0–2=0 -53.1
Chess Festival Groningen Open A Saturday 21 December 2024 +4–2=3 +6.7
NK-Snelschaken 2024 Saturday 14 September 2024 +15–6=5 -107.4

Rating History

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Peak Ratings

Classical 2339
Rapid 2335
Blitz 2336

Games

Wins 37
Losses 15
Draws 11
Win Rate 59%

Performance by Color

Color Wins Draws Losses Win Rate
White 19 6 8 58%
Black 18 5 7 60%

All-time Games (from rating history)

Classical 203
Rapid 7
Blitz 57

Recent Matches

FM Pel, B. (bonno) (2275) 2026-04-11 LOSS -11.2
Hania, J. (jan) (2156) 2026-03-07 DRAW -4.2
Egmond Van, E. (enrico) (2044) 2026-03-28 WIN +3.4
Van Rijsoort, Piet-Hein 2026-03-29 WIN +1.6
Groenewoud, Joel (1975) 2026-03-29 WIN +4.0
Van Ee, Winston (1937) 2026-03-29 WIN +3.4
Groenewoud, Joel (1975) 2026-03-29 WIN +4.0
Smeets, Bent 2026-03-29 WIN +1.6
FM Breukelman, Jan (2327) 2026-03-29 DRAW +3.0
Van Rijsoort, Piet-Hein 2026-03-29 WIN +1.6
FM Breukelman, Jan (2327) 2026-03-29 WIN +13.0
Van Ee, Winston (1937) 2026-03-29 WIN +3.4
FM Mazajchik, Tim (2179) 2026-03-29 WIN +9.0
FM Mazajchik, Tim (2179) 2026-03-29 WIN +9.0
Smeets, Bent 2026-03-29 WIN +1.6
CM Bruil, Rembrandt (2123) 2026-03-29 WIN +7.6
FM De Winter, Arthur (2492) 2026-03-29 LOSS -3.4
CM Bruil, Rembrandt (2123) 2026-03-29 WIN +7.6
FM Labruyere, Roger (2205) 2026-03-29 WIN +9.8
FM Breukelman, Jan (2327) 2026-03-29 WIN +13.0
FM De Winter, Arthur (2492) 2026-03-29 LOSS -3.4
FM De Winter, Arthur (2492) 2026-03-29 DRAW +6.6
FM De Winter, Arthur (2492) 2026-03-29 DRAW +6.6
FM Labruyere, Roger (2205) 2026-03-29 WIN +9.8
FM Breukelman, Jan (2327) 2026-03-29 WIN +13.0
Wedda, D. (dries) (2185) 2026-02-07 WIN +7.0
CM Bouzidi, Ahmed (2126) 2026-02-07 WIN +5.6
Liu, Huaqi (2100) 2026-02-07 WIN +5.0
GM Zaibi, Amir (2332) 2026-02-07 LOSS -9.0
Achour, Mohamed Anis (2129) 2026-02-07 DRAW -4.4
Berend, Elvira (2252) 2026-02-07 DRAW -1.2
GM Moussard, Jules (2592) 2026-02-07 LOSS -3.0
Minde, Baptiste (2052) 2026-02-07 WIN +4.0
CM Bourg, Nicolas (2159) 2026-02-07 WIN +6.4
CM Cai, Chaoruo (2274) 2026-02-07 WIN +9.4
Echcharbiny, Wissal 2026-02-11 WIN +1.6
Dejardin, Gregoire (1916) 2026-02-11 WIN +2.4
IM Meftahi, Houssem Eddine (2120) 2026-02-11 LOSS -13.8
Minde, Baptiste (1956) 2026-02-11 WIN +2.8
Durand-Benmoussa, Roman (2235) 2026-02-11 LOSS -10.6
Charfeddine, Khaled 2026-02-11 WIN +1.6
Achour, Mohamed Anis (2061) 2026-02-11 WIN +4.8
Minde, Timothe (1880) 2026-02-11 LOSS -18.2
Denninger, Guilhem (2010) 2026-02-11 LOSS -16.2
CM Khandhadia, Nivaan Rathin (2112) 2025-12-21 WIN +5.0
FM De Boer, Eelke (2436) 2025-12-21 DRAW +3.4
FM Elmi, Saad Abobaker (2409) 2025-12-21 LOSS -7.2
FM Duijker, Rick (2148) 2025-12-21 DRAW -4.2
FM Schuricht, Emil Frederick (2262) 2025-12-21 DRAW -1.2
FM Wempe, Joost (2212) 2025-12-21 WIN +7.4