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Player Profile

Player:

(Eg: Carlsen,Magnus)

Koster, R



Years:	2024-
Number of games:	22
Number of wins:	10
Number of draws:	9
Number of losses:	3
White score:	8/11 (72.73% - Average Elo: 2213.36)
Black score:	6½/11 (59.09% - Average Elo: 2252)

Games
White wins
White draws
White losses
Black wins
Black draws
Black losses

Top wins

Koster, R (2311) - Kazarjan, Gachatur (2202), Science Park Open A 2025, Amsterdam NED (D35) - 2025

Koster, R (2330) - Grooten, Herman (2183), 60th Groningen Open 2024, Groningen NED (E42) - 2024

Koster, R (2330) - Hummel, Paul (2160), 60th Groningen Open 2024, Groningen NED (E47) - 2024

Weber, Samuel (2263) - Koster, R (2330), 60th Groningen Open 2024, Groningen NED (B90) - 2024

Mareau, Timothe (2168) - Koster, R (2330), 60th Groningen Open 2024, Groningen NED (B23) - 2024

Thijssen, Freek (2122) - Koster, R (2317), HSG Open 2025, Hilversum NED (B90) - 2025

Koster, R - ? (11)

Albers, Sasa (½/1)

Cernov, Henrik (½/1)

De Vries, Leon (1/1)

De Winter, Arthur (0/1)

Doggers, Peter (1/1)

Grooten, Herman (1/1)

Hummel, Paul (1/1)

Kazarjan, Gachatur (1/1)

Stolwijk, Colin (½/1)

Winter, Sven (1/1)

Zwirs, Nico (½/1)

? - Koster, R (11)

Albers, Sasa (½/1)

De Jong, Lode (0/1)

Dovgaliuk, Oleksandr (½/1)

Grooten, Tommy (½/1)

Mareau, Timothe (1/1)

Narayanan, SL (0/1)

Pham, Khoi (½/1)

Riemersma, Liafbern (½/1)

Rosegg, Dennis (1/1)

Thijssen, Freek (1/1)

Weber, Samuel (1/1)

Openings played as White (8)

E47 Nimzo-Indian, 4.e3 O-O 5.Bd3 (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3)
Average Elo: 2199.67
Result: 2/3 = 66.67%

D86 Grunfeld, Exchange (1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4)
Average Elo: 2103.5
Result: 2/2 = 100%

E42 Nimzo-Indian, 4.e3 c5, 5.Ne2 (Rubinstein) (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 c5 5.Ne2)
Average Elo: 2183
Result: 1/1 = 100%

A40 Queen's Pawn Game (1.d4)
Average Elo: 2446
Result: 0/1 = 0%

E44 Nimzo-Indian, Fischer Variation, 5.Ne2 (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 b6 5.Ne2)
Average Elo: 2213
Result: ½/1 = 50%

D11 Queen's Gambit Declined Slav (1.d4 d5 2.c4 c6 3.Nf3)
Average Elo: 2041
Result: 1/1 = 100%

D35 Queen's Gambit Declined (1.d4 d5 2.c4 e6 3.Nc3 Nf6)
Average Elo: 2202
Result: 1/1 = 100%

E48 Nimzo-Indian, 4.e3 O-O 5.Bd3 d5 (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 d5)
Average Elo: 2456
Result: ½/1 = 50%

Openings played as Black (8)

B90 Sicilian, Najdorf (1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6)
Average Elo: 2190.25
Result: 2½/4 = 62.5%

D11 Queen's Gambit Declined Slav (1.d4 d5 2.c4 c6 3.Nf3)
Average Elo: 2153
Result: ½/1 = 50%

A35 English, Symmetrical (1.c4 c5 2.Nc3 Nc6)
Average Elo: 2647
Result: 0/1 = 0%

B23 Sicilian, Closed (1.e4 c5 2.Nc3)
Average Elo: 2168
Result: 1/1 = 100%

D13 Queen's Gambit Declined Slav, Exchange Variation (1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5)
Average Elo: 2080
Result: 1/1 = 100%

B12 Caro-Kann Defense (1.e4 c6 2.d4)
Average Elo: 2174
Result: ½/1 = 50%

D12 Queen's Gambit Declined Slav (1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5)
Average Elo: 2431
Result: ½/1 = 50%

B10 Caro-Kann (1.e4 c6)
Average Elo: 2358
Result: ½/1 = 50%