FIDE Master

Koster, Ramon

FIDE ID 1008544

Games

Wins

Draws

Losses

58%

Score

Peak rating2335

Latest rating2296

First seenSep 14, 2024

Last seenFeb 15, 2026

Recent games

Date	White	Result	Black	Event	Opening
Feb 15, 2026	Cai	0–1	Koster	Round 9: Cai, Chaoruo - Koster, Ramon	Slav Defense: Modern Line
Feb 14, 2026	Koster	1–0	Bourg	Round 8: Koster, Ramon - Bourg, Nicolas	Dutch Defense: Semi-Leningrad Variation
Feb 13, 2026	Koster	1–0	Minde	Round 7: Koster, Ramon - Minde, Baptiste	Benko Gambit Accepted: Modern Variation
Feb 12, 2026	Berend	½–½	Koster	Round 5: Berend, Elvira - Koster, Ramon	Slav Defense: Czech Variation, Dutch Variation
Feb 11, 2026	Koster	0–1	Denninger	Round 9: Koster, Ramon - Denninger, Guilhem	Italian Game: Paris Defense
Feb 11, 2026	Minde	1–0	Koster	Round 8: Minde, Timothe - Koster, Ramon	Sicilian Defense: Moscow Variation
Feb 11, 2026	Koster	1–0	Achour	Round 7: Koster, Ramon - Achour, Mohamed Anis	Queen's Gambit Declined: Charousek Variation
Feb 11, 2026	Charfeddine	0–1	Koster	Round 6: Charfeddine,Khaled - Koster, Ramon	Benoni Defense
Feb 11, 2026	Koster	0–1	Durand-Benmoussa	Round 5: Koster, Ramon - Durand-Benmoussa, Roman	King's Indian Defense: Semi-Averbakh System
Feb 11, 2026	Minde	0–1	Koster	Round 4: Minde, Baptiste - Koster, Ramon	Indian Defense: Accelerated London System
Feb 11, 2026	Koster	0–1	Meftahi	Round 3: Koster, Ramon - Meftahi, Houssem Eddine	Queen's Gambit Declined: Exchange Variation, Positional Variation
Feb 11, 2026	Dejardin	0–1	Koster	Round 2: Dejardin, Gregoire - Koster, Ramon	English Opening: Symmetrical Variation, Rubinstein Variation
Feb 11, 2026	Koster	1–0	Echcharbiny	Round 1: Koster, Ramon - Echcharbiny, Wissal	Slav Defense: Quiet Variation
Feb 10, 2026	Koster	½–½	Achour	Round 4: Koster, Ramon - Achour, Mohamed Anis	Nimzo-Indian Defense: Normal Variation, Botvinnik System
Feb 10, 2026	Zaibi	1–0	Koster	Round 3: Zaibi, Amir - Koster, Ramon	Indian Defense: Spielmann-Indian
Feb 9, 2026	Koster	1–0	Liu	Round 2: Koster, Ramon - Liu, Huaqi	Modern Defense: Averbakh System
Feb 8, 2026	Bouzidi	0–1	Koster	Round 1: Bouzidi, Ahmed - Koster, Ramon	Sicilian Defense: Alapin Variation
Feb 7, 2026	Moussard	1–0	Koster	Round 6: Moussard, Jules - Koster, Ramon	Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense
Dec 29, 2025	Koster	1–0	Edwardss	Round 9: Koster, Ramon - Edwardss, Dylan	Nimzo-Indian Defense: St. Petersburg Variation
Dec 28, 2025	Koster	0–1	Shyaam Nikhil P	Round 8: Koster, Ramon - Shyaam Nikhil P	Nimzo-Indian Defense: Rubinstein System
Dec 28, 2025	Sanjay Narayanan P S	0–1	Koster	Round 7: Sanjay Narayanan P S - Koster, Ramon	Sicilian Defense: Najdorf Variation, English Attack
Dec 26, 2025	Koster	1–0	Wempe	Round 6: Koster, Ramon - Wempe, Joost	Nimzo-Indian Defense: Normal Variation, Botvinnik System
Dec 24, 2025	Schuricht	½–½	Koster	Round 5: Schuricht, Emil Frederick - Koster, Ramon	Slav Defense: Exchange Variation
Dec 24, 2025	Koster	½–½	Duijker	Round 4: Koster, Ramon - Duijker, Rick	Queen's Gambit Accepted: Rosenthal Variation
Dec 23, 2025	Elmi	1–0	Koster	Round 3: Elmi, Saad Abobaker - Koster, Ramon	Sicilian Defense: Modern Variations
Dec 22, 2025	Koster	½–½	De Boer	Round 2: Koster, Ramon - De Boer, Eelke	Benko Gambit Accepted: Modern Variation
Dec 21, 2025	Khandhadia Nivaan Rathin	0–1	Koster	Round 1: Khandhadia Nivaan Rathin - Koster, Ramon	Slav Defense
Dec 3, 2025	Kudaibergen	0–1	Koster	Round 9: Kudaibergen, Nurlykhan - Koster, Ramon	Caro-Kann Defense: Exchange Variation
Dec 2, 2025	Koster	0–1	Magold	Round 8: Koster, Ramon - Magold, Filip	Benko Gambit Accepted: Modern Variation
Dec 1, 2025	Koster	1–0	Farberov	Round 7: Koster, Ramon - Farberov, Maxim	King's Indian Defense: Orthodox Variation, Glek Defense
Nov 30, 2025	Han	1–0	Koster	Round 6: Han, Qixiang - Koster, Ramon	Slav Defense: Czech Variation, Classical System, Main Line
Nov 30, 2025	Koster	1–0	Mesropyan	Round 5: Koster, Ramon - Mesropyan, Hayk	Queen's Gambit Declined: Harrwitz Attack, Main Line
Nov 29, 2025	Badrinath	0–1	Koster	Round 4: Badrinath, S. - Koster, Ramon	Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense
Nov 28, 2025	Koster	½–½	Deepak Ambattu	Round 3: Koster, Ramon - Deepak Ambattu, Rithvik	Queen's Gambit Declined: Exchange Variation, Positional Variation
Nov 28, 2025	Carroll	1–0	Koster	Round 2: Carroll, Peter - Koster, Ramon	Sicilian Defense: Najdorf Variation, Adams Attack
Nov 27, 2025	Koster	0–1	Yuffa	Round 1: Koster, Ramon - Yuffa, Daniil	Nimzo-Indian Defense: Normal Variation
Dec 30, 2024	Mareau	0–1	Koster	Round 9: Mareau, Timothe - Koster, Ramon	Sicilian Defense: Closed
Dec 29, 2024	Koster	½–½	Cernov	Round 8: Koster, Ramon - Cernov, Henrik	Nimzo-Indian Defense: Normal Variation
Dec 28, 2024	Albers	½–½	Koster	Round 7: Albers, Sasa - Koster, Ramon	Sicilian Defense: Najdorf Variation, English Attack
Dec 27, 2024	Koster	0–1	De Winter	Round 6: Koster, Ramon - De Winter, Arthur	English Defense
Dec 26, 2024	Weber	0–1	Koster	Round 5: Weber, Samuel - Koster, Ramon	Sicilian Defense: Najdorf Variation, Adams Attack
Dec 24, 2024	Koster	1–0	Grooten	Round 4: Koster, Ramon - Grooten, Herman	Nimzo-Indian Defense: St. Petersburg Variation, Romanishin–Psakhis Variation
Dec 23, 2024	Narayanan S L	1–0	Koster	Round 3: Narayanan S L - Koster, Ramon	English Opening: Symmetrical Variation, Rubinstein Variation
Dec 22, 2024	Koster	1–0	Hummel	Round 2: Koster, Ramon - Hummel, Paul	Nimzo-Indian Defense: Normal Variation
Dec 21, 2024	Grooten	½–½	Koster	Round 1: Grooten, Tommy - Koster, Ramon	Slav Defense: Modern Line
Sep 14, 2024	Koster	1–0	Elgersma	Round 1: Koster, Ramon - Elgersma, Onno	Queen's Gambit Declined
Sep 14, 2024	Koster	1–0	Grochal	Round 3: Koster, Ramon - Grochal, Joey	Nimzo-Indian Defense: Normal Variation
Sep 14, 2024	Koster	1–0	Tikranian	Round 4: Koster, Ramon - Tikranian, Alik	Benko Gambit Accepted: Modern Variation
Sep 14, 2024	Koster	1–0	Ratsma	Round 6: Koster, Ramon - Ratsma, Midas	Queen's Gambit Declined
Sep 14, 2024	Koster	½–½	Grooten	Round 8: Koster, Ramon - Grooten, Tommy	Benoni Defense: King's Pawn Line
Sep 14, 2024	Koster	½–½	Kazarjan	Round 10: Koster, Ramon - Kazarjan, Gachatur	Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch
Sep 14, 2024	Admiraal	1–0	Koster	Round 2: Admiraal, Miguoel - Koster, Ramon	Queen's Pawn Game: Accelerated London System, Steinitz Countergambit Accepted
Sep 14, 2024	Schilstra	1–0	Koster	Round 5: Schilstra, Laurens - Koster, Ramon	Sicilian Defense: Najdorf Variation
Sep 14, 2024	Grooten	0–1	Koster	Round 7: Grooten, Herman - Koster, Ramon	Slav Defense: Modern Line
Sep 14, 2024	Kerkmeester	1–0	Koster	Round 9: Kerkmeester, Cedric - Koster, Ramon	Sicilian Defense: Najdorf Variation, Amsterdam Variation
Sep 14, 2024	Van Delft	0–1	Koster	Round 11: Van Delft, Merijn - Koster, Ramon	Sicilian Defense: Najdorf Variation, Main Line
—	Koster	½–½	Takahashi	Sala 2 - Masters	Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation
—	Koster	½–½	Bailet	Maia Chess Open	King's Indian Defense: Semi-Averbakh System
—	Koster	1–0	Gomez Carreno	Sala 2 - Masters	Nimzo-Indian Defense: St. Petersburg Variation
—	Koster	1–0	Rodriguez Ferreiros	Sala 2 - Masters	Horwitz Defense
—	Cabanas Lopez	0–1	Koster	Sala 2 - Masters	Slav Defense
—	Zhang	*	Koster	Sala 2 - Masters	Slav Defense: Czech Variation, Krause Attack
—	Smirin	1–0	Koster	Maia Chess Open	Sicilian Defense: Dragon Variation, Fianchetto Variation
—	Guleryuz	1–0	Koster	Sala 2 - Masters	Sicilian Defense: Alapin Variation
—	Mammadova	1–0	Koster	Sala 2 - Masters	Sicilian Defense: Najdorf Variation, Main Line