Player profile
Koster, Ramon
Dossier
82 of 86 games analyzed.
Accuracy: 91.2%
Opened d4: 37/39Opened e4: 1/39Opened Nf3: 1/39
Castled kingside: 60Same-side castling: 54Did not castle: 11Opposite-side castling: 5Castled queenside: 3
Played in the center: 25Played on the queenside: 19Fianchettoed kingside: 14Played on the kingside: 13Fianchettoed queenside: 10
Active pieces: 53Initiated exchanges: 48Isolated pawn: 44Space advantage: 42Backward pawn: 40Kept the bishop pair: 40Sacrificed material: 39Avoided exchanges: 17Missed tactics: 12Played gambits: 4
Openings
Click "+" to add that group to the games list below. Multiple groups can be added at once.
As White 40 games 19W 8D 13L
Nimzo-Indian Defense 13 games 5W 3D 5L
Normal Variation 9 games 3W 3D 3L
(unspecified)
6 games
2W
2D
2L
Botvinnik System
3 games
1W
1D
1L
St. Petersburg Variation 2 games 2W 0D 0L
(unspecified)
1 game
1W
0D
0L
Romanishin-Psakhis Variation
1 game
1W
0D
0L
Sämisch Variation 1 game 0W 0D 1L
Capablanca Variation
1 game
0W
0D
1L
Rubinstein System 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Queen's Gambit Declined 8 games 5W 2D 1L
Exchange Variation 2 games 0W 1D 1L
Positional Variation
2 games
0W
1D
1L
(unspecified) 2 games 2W 0D 0L
(unspecified)
2 games
2W
0D
0L
Queen's Knight Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Charousek Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Harrwitz Attack 1 game 1W 0D 0L
Main Line
1 game
1W
0D
0L
Tarrasch Defense 1 game 0W 1D 0L
Pseudo-Tarrasch
1 game
0W
1D
0L
Benko Gambit Accepted 5 games 3W 1D 1L
Modern Variation 5 games 3W 1D 1L
(unspecified)
5 games
3W
1D
1L
Benoni Defense 3 games 2W 1D 0L
King's Pawn Line 2 games 1W 1D 0L
(unspecified)
2 games
1W
1D
0L
Classical Variation 1 game 1W 0D 0L
Traditional Variation
1 game
1W
0D
0L
Queen's Gambit Accepted 2 games 0W 1D 1L
Winawer Defense 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Rosenthal Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
King's Indian Defense 2 games 1W 0D 1L
Semi-Averbakh System 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Orthodox Variation 1 game 1W 0D 0L
Glek Defense
1 game
1W
0D
0L
Grünfeld Defense 1 game 0W 0D 1L
Exchange Variation 1 game 0W 0D 1L
Classical Variation
1 game
0W
0D
1L
Semi-Slav Defense 1 game 0W 0D 1L
Botvinnik Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Dutch Defense 1 game 1W 0D 0L
Semi-Leningrad Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Italian Game 1 game 0W 0D 1L
Paris Defense 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Slav Defense 1 game 1W 0D 0L
Quiet Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Modern Defense 1 game 1W 0D 0L
Averbakh System 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
English Defense 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
As Black 37 games 19W 7D 11L
Sicilian Defense 12 games 6W 1D 5L
Najdorf Variation 7 games 3W 1D 3L
English Attack
2 games
1W
1D
0L
Adams Attack
2 games
1W
0D
1L
Main Line
1 game
1W
0D
0L
Amsterdam Variation
1 game
0W
0D
1L
(unspecified)
1 game
0W
0D
1L
Lasker-Dunne Attack 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Moscow Variation 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Alapin Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Modern Variations 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Closed 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Slav Defense 7 games 3W 3D 1L
Modern Line 3 games 2W 1D 0L
(unspecified)
3 games
2W
1D
0L
Czech Variation 2 games 0W 1D 1L
Dutch Variation
1 game
0W
1D
0L
Classical System, Main Line
1 game
0W
0D
1L
Exchange Variation 1 game 0W 1D 0L
(unspecified)
1 game
0W
1D
0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Caro-Kann Defense 5 games 3W 0D 2L
Advance Variation 4 games 2W 0D 2L
Botvinnik-Carls Defense
4 games
2W
0D
2L
Exchange Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Queen's Gambit Declined 3 games 1W 2D 0L
Exchange Variation 2 games 0W 2D 0L
Sämisch Variation
2 games
0W
2D
0L
Barmen Variation 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Indian Defense 2 games 1W 0D 1L
Pseudo-Benko 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Spielmann-Indian 1 game 0W 0D 1L
(unspecified)
1 game
0W
0D
1L
Catalan Opening 2 games 2W 0D 0L
Open Defense 2 games 2W 0D 0L
Classical Line
2 games
2W
0D
0L
Queen's Pawn Game 2 games 1W 0D 1L
London System 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Accelerated London System 1 game 0W 0D 1L
Steinitz Countergambit Accepted
1 game
0W
0D
1L
English Opening 2 games 1W 0D 1L
Symmetrical Variation 2 games 1W 0D 1L
Rubinstein Variation
2 games
1W
0D
1L
Ruy Lopez 1 game 0W 1D 0L
Morphy Defense 1 game 0W 1D 0L
Steinitz Deferred
1 game
0W
1D
0L
Benoni Defense 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified)
1 game
1W
0D
0L
Blunders Top 4 of 293
This player's costliest moves in analyzed games. Can you find the winning move?
Games Showing all 86 games
| Date | Event | Round | Color | Opponent | Result | Accuracy % | First moves |
|---|---|---|---|---|---|---|---|
| 2026.10.31 | Round 9: Koster, Ramon - Fates, Omer Salah | 9.8 | 2026.10.31 Fates, Omer Salah (9212035) (2080) | 1 | 96.40% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2026.10.30 | Round 8: Achour, Mohamed Anis - Koster, Ramon | 8.12 | 2026.10.30 Achour, Mohamed Anis (7904649) (2145) | 1 | 96.00% | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2026.10.29 | Round 7: Koster, Ramon - Sala, Giulia | 7.14 | 2026.10.29 Sala, Giulia (2840451) (2074) | 1 | 95.80% | 1. d4 d5 2. c4 e6 3. Nc3 h6 | |
| 2026.10.28 | Round 6: Koster, Ramon - Bouzidi, Ahmed | 6.15 | 2026.10.28 Bouzidi, Ahmed (5501733) (2112) | ½ | 83.80% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.10.28 | Round 5: Kakavand, Ramtin - Koster, Ramon | 5.11 | 2026.10.28 Kakavand, Ramtin (32790597) (2160) | 0 | 86.00% | 1. e4 c6 2. d4 d5 3. e5 c5 | |
| 2026.10.27 | Round 4: Koster, Ramon - Naser Eldean,Ahmed | 4.7 | 2026.10.27 Naser Eldean,Ahmed (9205365) (2028) | 0 | 84.40% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.10.26 | Round 3: Abdulrahman, Mohammed Midhat - Koster, Ramon | 3.11 | 2026.10.26 Abdulrahman, Mohammed Midhat (9220240) (2118) | 1 | 96.60% | 1. e4 c5 2. g3 d5 3. exd5 Qxd5 | |
| 2026.10.25 | Round 1: Ben Ammar, Mohamed - Koster, Ramon | 1.13 | 2026.10.25 Ben Ammar, Mohamed (5502012) (2061) | 1 | 90.50% | 1. d4 Nf6 2. Nf3 c5 3. d5 b5 | |
| 2026.10.24 | Round 2: Koster, Ramon - Sambuev, Bator | 2.1 | 2026.10.24 Sambuev, Bator (4128290) (2441) | 0 | 84.60% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.10.06 | Meesterklasse 2026-2027 | 2.5 | 2026.10.06 Pauly, Carlo (24673269) (2340) | ½ | 92.70% | 1. d4 Nf6 2. Nf3 d5 3. c4 e6 | |
| 2026.10.03 | Round 2: Pauly, Carlo - Koster, Ramon | 1.2 | 2026.10.03 Pauly, Carlo (24673269) (2340) | ½ | - | 1. d4 Nf6 2. Nf3 d5 3. c4 e6 | |
| 2026.09.22 | Meesterklasse 2026-2027 | 1.5 | 2026.09.22 Dovgaliuk, Oleksandr (14167247) (2291) | 0 | 80.80% | 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 | |
| 2026.08.29 | Round 9: Koster, Ramon - Goncalves, Samuel Jesus P | 9.9 | 2026.08.29 Goncalves, Samuel Jesus P (1945130) (2252) | 0 | 81.70% | 1. d4 Nf6 2. c4 g6 3. Nc3 d5 | |
| 2026.08.28 | Round 8: Gonzalez Pinar, Adrian - Koster, Ramon | 8.10 | 2026.08.28 Gonzalez Pinar, Adrian (54546575) (2103) | 1 | 98.90% | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2026.08.27 | Round 7: Koster, Ramon - Janzelj, Tim | 7.4 | 2026.08.27 Janzelj, Tim (14607913) (2416) | 0 | 85.00% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2026.08.25 | Round 5: Koster, Ramon - Garcia Sobrino, David | 5.7 | 2026.08.25 Garcia Sobrino, David (32028407) (2159) | 1 | 96.20% | 1. d4 Nf6 2. c4 c5 3. d5 e6 | |
| 2026.08.24 | Round 4: Arvola, Daniel - Koster, Ramon | 4.3 | 2026.08.24 Arvola, Daniel (1585541) (2140) | ½ | 97.40% | 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 | |
| 2026.08.23 | Round 3: Koster, Ramon - Haug, Havard | 3.2 | 2026.08.23 Haug, Havard (1547887) (2436) | 0 | - | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.08.22 | Round 2: Woods, Yannick - Koster, Ramon | 2.6 | 2026.08.22 Woods, Yannick (2518384) (2118) | 1 | - | 1. e4 c6 2. d4 d5 3. e5 c5 | |
| 2026.08.22 | Round 1: Koster, Ramon - Kamp, Aaron | 1.7 | 2026.08.22 Kamp, Aaron (16231120) (2063) | 1 | 92.10% | 1. d4 Nf6 2. c4 c5 3. d5 e6 | |
| 2026.08.18 | Round 6: Gennari, Jacopo - Koster, Ramon | 6.1 | 2026.08.18 Gennari, Jacopo (854646) (2205) | 1 | 97.80% | 1. d4 Nf6 2. c4 e6 3. Nf3 d5 | |
| 2026.02.15 | Round 9: Cai, Chaoruo - Koster, Ramon | 9.3 | 2026.02.15 Cai, Chaoruo (8618402) (2274) | 1 | 96.30% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2026.02.14 | Round 8: Koster, Ramon - Bourg, Nicolas | 8.3 | 2026.02.14 Bourg, Nicolas (4006160) (2159) | 1 | 93.30% | 1. d4 f5 2. g3 Nf6 3. Bg2 g6 | |
| 2026.02.13 | Round 7: Koster, Ramon - Minde, Baptiste | 7.4 | 2026.02.13 Minde, Baptiste (45172110) (2052) | 1 | 96.70% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2026.02.12 | Round 5: Berend, Elvira - Koster, Ramon | 5.4 | 2026.02.12 Berend, Elvira (4000510) (2252) | ½ | 92.00% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2026.02.11 | Round 9: Koster, Ramon - Denninger, Guilhem | 9.7 | 2026.02.11 Denninger, Guilhem (26060027) (2050) | 0 | 63.50% | 1. e4 e5 2. Nf3 Nc6 3. Bc4 d6 | |
| 2026.02.11 | Round 8: Minde, Timothe - Koster, Ramon | 8.5 | 2026.02.11 Minde, Timothe (551015579) (2005) | 0 | 77.10% | 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 | |
| 2026.02.11 | Round 7: Koster, Ramon - Achour, Mohamed Anis | 7.6 | 2026.02.11 Achour, Mohamed Anis (7904649) (2129) | 1 | 90.40% | 1. d4 d5 2. c4 e6 3. Nc3 Be7 | |
| 2026.02.11 | Round 6: Charfeddine,Khaled - Koster, Ramon | 6.10 | 2026.02.11 Charfeddine,Khaled (5519136) (1882) | 1 | 91.40% | 1. d4 Nf6 2. c4 c5 3. e3 g6 | |
| 2026.02.11 | Round 5: Koster, Ramon - Durand-Benmoussa, Roman | 5.3 | 2026.02.11 Durand-Benmoussa, Roman (45196915) (2128) | 0 | 95.10% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | |
| 2026.02.11 | Round 4: Minde, Baptiste - Koster, Ramon | 4.7 | 2026.02.11 Minde, Baptiste (45172110) (2052) | 1 | 92.80% | 1. d4 Nf6 2. Bf4 c5 3. e3 d5 | |
| 2026.02.11 | Round 3: Koster, Ramon - Meftahi, Houssem Eddine | 3.4 | 2026.02.11 Meftahi, Houssem Eddine (5501660) (2107) | 0 | 80.60% | 1. d4 Nf6 2. c4 e6 3. Nc3 d5 | |
| 2026.02.11 | Round 2: Dejardin, Gregoire - Koster, Ramon | 2.4 | 2026.02.11 Dejardin, Gregoire (651017520) (1977) | 1 | 93.60% | 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 | |
| 2026.02.11 | Round 1: Koster, Ramon - Echcharbiny, Wissal | 1.4 | 2026.02.11 Echcharbiny, Wissal (9014853) (1726) | 1 | 90.60% | 1. Nf3 d5 2. c4 c6 3. d4 Nf6 | |
| 2026.02.10 | Round 4: Koster, Ramon - Achour, Mohamed Anis | 4.2 | 2026.02.10 Achour, Mohamed Anis (7904649) (2129) | ½ | 96.40% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2026.02.10 | Round 3: Zaibi, Amir - Koster, Ramon | 3.2 | 2026.02.10 Zaibi, Amir (5500796) (2332) | 0 | 89.40% | 1. d4 Nf6 2. Nf3 c5 3. e3 d5 | |
| 2026.02.09 | Round 2: Koster, Ramon - Liu, Huaqi | 2.3 | 2026.02.09 Liu, Huaqi (8640319) (2099) | 1 | 94.40% | 1. d4 g6 2. c4 Bg7 3. e4 d6 | |
| 2026.02.08 | Round 1: Bouzidi, Ahmed - Koster, Ramon | 1.3 | 2026.02.08 Bouzidi, Ahmed (5501733) (2126) | 1 | 95.90% | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 | |
| 2026.02.07 | Round 6: Moussard, Jules - Koster, Ramon | 6.1 | 2026.02.07 Moussard, Jules (642908) (2592) | 0 | 91.60% | 1. e4 c6 2. d4 d5 3. e5 c5 | |
| 2025.12.29 | Round 9: Koster, Ramon - Edwardss, Dylan | 9.13 | 2025.12.29 Edwardss, Dylan (1057847) (2165) | 1 | 97.70% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.12.28 | Round 8: Koster, Ramon - Shyaam Nikhil P | 8.8 | 2025.12.28 Shyaam Nikhil P (5024218) (2400) | 0 | 76.20% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.12.28 | Round 7: Sanjay Narayanan P S - Koster, Ramon | 7.12 | 2025.12.28 Sanjay Narayanan P S (25154540) (2028) | 1 | 88.90% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2025.12.26 | Round 6: Koster, Ramon - Wempe, Joost | 6.16 | 2025.12.26 Wempe, Joost (1005502) (2212) | 1 | 95.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2025.12.24 | Round 5: Schuricht, Emil Frederick - Koster, Ramon | 5.15 | 2025.12.24 Schuricht, Emil Frederick (16270185) (2262) | ½ | 89.90% | 1. d4 d5 2. c4 c6 3. cxd5 cxd5 | |
| 2025.12.24 | Round 4: Koster, Ramon - Duijker, Rick | 4.17 | 2025.12.24 Duijker, Rick (1010565) (2148) | ½ | 93.90% | 1. d4 d5 2. c4 dxc4 3. Nf3 e6 | |
| 2025.12.23 | Round 3: Elmi, Saad Abobaker - Koster, Ramon | 3.10 | 2025.12.23 Elmi, Saad Abobaker (1553259) (2409) | 0 | 91.70% | 1. e4 c5 2. Nf3 d6 3. Bc4 Nf6 | |
| 2025.12.22 | Round 2: Koster, Ramon - De Boer, Eelke | 2.7 | 2025.12.22 De Boer, Eelke (1048120) (2436) | ½ | 97.40% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2025.12.21 | Round 1: Khandhadia Nivaan Rathin - Koster, Ramon | 1.24 | 2025.12.21 Khandhadia Nivaan Rathin (25753274) (2112) | 1 | 97.40% | 1. d4 d5 2. c4 c6 3. Nc3 Nf6 | |
| 2025.12.03 | Round 9: Kudaibergen, Nurlykhan - Koster, Ramon | 9.36 | 2025.12.03 Kudaibergen, Nurlykhan (13724665) (2139) | 1 | 94.30% | 1. e4 c6 2. d4 d5 3. exd5 cxd5 | |
| 2025.12.02 | Round 8: Koster, Ramon - Magold, Filip | 8.20 | 2025.12.02 Magold, Filip (1254456) (2467) | 0 | 89.00% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2025.12.01 | Round 7: Koster, Ramon - Farberov, Maxim | 7.30 | 2025.12.01 Farberov, Maxim (2070944) (2133) | 1 | 91.20% | 1. d4 d6 2. Nf3 Nf6 3. c4 g6 | |
| 2025.11.30 | Round 6: Han, Qixiang - Koster, Ramon | 6.25 | 2025.11.30 Han, Qixiang (496952) (2104) | 0 | 91.70% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2025.11.30 | Round 5: Koster, Ramon - Mesropyan, Hayk | 5.30 | 2025.11.30 Mesropyan, Hayk (499455) (2136) | 1 | 97.10% | 1. d4 d5 2. c4 e6 3. Nf3 Nf6 | |
| 2025.11.29 | Round 4: Badrinath, S. - Koster, Ramon | 4.43 | 2025.11.29 Badrinath, S. (5029961) (2200) | 1 | 94.00% | 1. e4 c6 2. d4 d5 3. e5 c5 | |
| 2025.11.28 | Round 3: Koster, Ramon - Deepak Ambattu, Rithvik | 3.44 | 2025.11.28 Deepak Ambattu, Rithvik (2410060) (2168) | ½ | 98.40% | 1. d4 d5 2. c4 e6 3. Nc3 Nf6 | |
| 2025.11.28 | Round 2: Carroll, Peter - Koster, Ramon | 2.33 | 2025.11.28 Carroll, Peter (2510243) (2165) | 0 | 85.40% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2025.11.27 | Round 1: Koster, Ramon - Yuffa, Daniil | 1.3 | 2025.11.27 Yuffa, Daniil (24131423) (2618) | 0 | 84.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.12.30 | Round 9: Mareau, Timothe - Koster, Ramon | 9.10 | 2024.12.30 Mareau, Timothe (45148864) (2168) | 1 | 98.60% | 1. e4 c5 2. Nc3 d6 3. f4 g6 | |
| 2024.12.29 | Round 8: Koster, Ramon - Cernov, Henrik | 8.10 | 2024.12.29 Cernov, Henrik (16258312) (2187) | ½ | 98.00% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.12.28 | Round 7: Albers, Sasa - Koster, Ramon | 7.14 | 2024.12.28 Albers, Sasa (1068253) (2268) | ½ | 98.50% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.12.27 | Round 6: Koster, Ramon - De Winter, Arthur | 6.5 | 2024.12.27 De Winter, Arthur (1069020) (2446) | 0 | 87.10% | 1. d4 e6 2. c4 b6 3. e4 Bb4+ | |
| 2024.12.26 | Round 5: Weber, Samuel - Koster, Ramon | 5.11 | 2024.12.26 Weber, Samuel (12924008) (2263) | 1 | 94.40% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.12.24 | Round 4: Koster, Ramon - Grooten, Herman | 4.17 | 2024.12.24 Grooten, Herman (1000330) (2183) | 1 | 95.90% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.12.23 | Round 3: Narayanan S L - Koster, Ramon | 3.4 | 2024.12.23 Narayanan S L (5058422) (2647) | 0 | 91.60% | 1. Nf3 Nf6 2. c4 c5 3. Nc3 Nc6 | |
| 2024.12.22 | Round 2: Koster, Ramon - Hummel, Paul | 2.18 | 2024.12.22 Hummel, Paul (1021168) (2160) | 1 | 93.70% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.12.21 | Round 1: Grooten, Tommy - Koster, Ramon | 1.16 | 2024.12.21 Grooten, Tommy (1068806) (2153) | ½ | 96.90% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2024.09.14 | Round 11: Van Delft, Merijn - Koster, Ramon | 11.5 | 2024.09.14 Van Delft, Merijn (1004670) (2377) | 1 | 91.70% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.09.14 | Round 10: Koster, Ramon - Kazarjan, Gachatur | 10.3 | 2024.09.14 Kazarjan, Gachatur (1068750) (1942) | ½ | 93.30% | 1. d4 d5 2. c4 e6 3. Nf3 c5 | |
| 2024.09.14 | Round 9: Kerkmeester, Cedric - Koster, Ramon | 9.4 | 2024.09.14 Kerkmeester, Cedric (1072579) (1954) | 0 | 83.10% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.09.14 | Round 8: Koster, Ramon - Grooten, Tommy | 8.4 | 2024.09.14 Grooten, Tommy (1068806) (1989) | ½ | 86.20% | 1. d4 Nf6 2. c4 e6 3. Nc3 c5 | |
| 2024.09.14 | Round 7: Grooten, Herman - Koster, Ramon | 7.3 | 2024.09.14 Grooten, Herman (1000330) (2145) | 1 | 97.30% | 1. d4 d5 2. c4 c6 3. Nf3 Nf6 | |
| 2024.09.14 | Round 6: Koster, Ramon - Ratsma, Midas | 6.5 | 2024.09.14 Ratsma, Midas (1032283) (2172) | 1 | 89.60% | 1. d4 d5 2. c4 e6 3. Nf3 c6 | |
| 2024.09.14 | Round 5: Schilstra, Laurens - Koster, Ramon | 5.2 | 2024.09.14 Schilstra, Laurens (1043218) (2178) | 0 | 81.50% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | |
| 2024.09.14 | Round 4: Koster, Ramon - Tikranian, Alik | 4.6 | 2024.09.14 Tikranian, Alik (1040952) (2284) | 1 | 86.90% | 1. d4 Nf6 2. c4 c5 3. d5 b5 | |
| 2024.09.14 | Round 3: Koster, Ramon - Grochal, Joey | 3.1 | 2024.09.14 Grochal, Joey (1019945) (2225) | 1 | 93.80% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | |
| 2024.09.14 | Round 2: Admiraal, Miguoel - Koster, Ramon | 2.6 | 2024.09.14 Admiraal, Miguoel (1019716) (2438) | 0 | 82.30% | 1. d4 d5 2. Bf4 c5 3. dxc5 Nf6 | |
| 2024.09.14 | Round 1: Koster, Ramon - Elgersma, Onno | 1.2 | 2024.09.14 Elgersma, Onno (1053531) (2253) | 1 | 93.00% | 1. d4 d5 2. c4 e6 3. Nf3 Nf6 | |
| Sala 2 - Masters | 9.5 | Mammadova, Narmin (13403710) (2220) | 0 | 90.50% | 1. e4 c5 2. Nf3 d6 3. d4 cxd4 | ||
| Sala 2 - Masters | 8.10 | Rodriguez Ferreiros, Andres (32066201) (2147) | 1 | 97.60% | 1. d4 e6 2. c4 a6 3. Nf3 d5 | ||
| Sala 2 - Masters | 7.8 | Guleryuz, Kuzey (44500203) (2142) | 0 | 89.00% | 1. e4 c5 2. c3 Nf6 3. e5 Nd5 | ||
| Sala 2 - Masters | 6.14 | Gomez Carreno, Martin (32066171) (2163) | 1 | 94.70% | 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 | ||
| Maia Chess Open | 5.8 | Smirin, Ilia (2801990) (2564) | 0 | 91.40% | 1. e4 c5 2. Ne2 Nf6 3. Nbc3 d6 | ||
| Maia Chess Open | 4.8 | Bailet, Pierre (655830) (2454) | ½ | 91.10% | 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 | ||
| Sala 2 - Masters | 3.11 | Zhang, Xin An (1969013) (1925) | * | - | 1. d4 d5 2. c4 c6 3. Nc3 Nf6 | ||
| Sala 2 - Masters | 2.5 | Takahashi, Michael (30911648) (2110) | ½ | 92.50% | 1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 | ||
| Sala 2 - Masters | 1.19 | Cabanas Lopez, Manuel Anxo (24588288) (2044) | 1 | 90.30% | 1. d4 d5 2. c4 c6 3. Nc3 Nf6 |