KNSB FIDE

Sander Koster

Rated since January 2023

1715 Classic

1715 Rapid

1715 Blitz

RIVALRY

Nemesis

Waanders, M.H. (Marinus)

Games: 5 · Win rate: 100%

Kryptonite

Lingeman, R. (Rein)

Games: 3 · Win rate: 0%

Easy Target

Gerritsen Mulkes, S. (Sven)

Games: 3 · Win rate: 100%

The good & the bad

Best wins

BRINKS, G.J. (JURIAN) 1672

9671 Rijssen interne Competitie 2024-2025 Deel 1 Ronde 1-8 · Thursday 10 October 2024

NIJSTAD, L. (LEROY) 1620

10636 Rijssen interne Competitie 2024-2025 Deel 3 Ronde 16-20 · Thursday 30 January 2025

MAAT VAN DE, G.W. (WIM) 1496

11116 Rijssen interne Competitie 2024-2025 Deel 4 Ronde 21-29 · Thursday 27 February 2025

SMIT, J.G. (GERBEN) 1468

10636 Rijssen interne Competitie 2024-2025 Deel 3 Ronde 16-20 · Thursday 16 January 2025

GERRITSEN MULKES, S. (SVEN) 1327

13352 Rijssen interne Competitie 2025-2026 Deel 4 Ronde 18-24 · Thursday 19 March 2026

Worst losses

GERRITSEN MULKES, J. (JASPER) 1440

10636 Rijssen interne Competitie 2024-2025 Deel 3 Ronde 16-20 · Thursday 23 January 2025

LINGEMAN, R. (REIN) 1615

10636 Rijssen interne Competitie 2024-2025 Deel 3 Ronde 16-20 · Thursday 13 February 2025

LANGE DE, H.J.G. (HANS) 1706

6148 S.C.Rijssen interne competitie 26-08-2021 t/m 19-05-2022 (030025) · Thursday 16 September 2021

KRUIMER, H.J. (ARJEN) 1769

9671 Rijssen interne Competitie 2024-2025 Deel 1 Ronde 1-8 · Thursday 3 October 2024

BRINKMAN, J.W. (JAN) 1802

6148 S.C.Rijssen interne competitie 26-08-2021 t/m 19-05-2022 (030025) · Thursday 26 August 2021

No FIDE-rated tournaments found.

Rijssen interne Competitie 2025-2026 Deel 4 Ronde 18-24 Thursday 4 September 2025 +4–2=0 -26.5

KNSB competitie 2024-2025 Klasse 6 ronde 1 Saturday 21 September 2024 +0–0=1 -2.0

Rijssen interne Competitie 2024-2025 Deel 5 Ronde 30-32 Thursday 5 September 2024 +2–0=0 +5.2

Rijssen interne Competitie 2024-2025 Deel 4 Ronde 21-29 Thursday 5 September 2024 +2–0=0 +6.7

Rijssen interne Competitie 2024-2025 Deel 3 Ronde 16-20 Thursday 5 September 2024 +2–2=1 -29.7

Rijssen interne Competitie 2024-2025 Deel 2 Ronde 9-15 Thursday 5 September 2024 +1–0=0 +7.6

Rijssen interne Competitie 2024-2025 Deel 1 Ronde 1-8 Thursday 5 September 2024 +1–1=0 -1.4

S.C.Rijssen interne competitie 26-08-2021 t/m 19-05-2022 (030025) Thursday 26 August 2021 +2–2=0 -13.0

Rating History

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Peak Ratings

Classic 1746 Jan. 1, 2025

Rapid 1728 March 1, 2026

Blitz 1728 March 1, 2026

Games

Wins 14

Losses 7

Draws 2

Win Rate 61%

Performance by Color

Color	Wins	Draws	Losses	Win Rate
White	5	0	3	62%
Black	9	2	4	60%

Recent Matches

Gerritsen Mulkes, S. (Sven) (1327) Thursday 19 March 2026 WIN +2.0

Lingeman, R. (Rein) (1623) Thursday 12 March 2026 LOSS -16.1

Waanders, M.H. (Marinus) (1200) Thursday 19 February 2026 WIN +0.8

Smit, J.G. (Gerben) (1455) Thursday 22 May 2025 WIN +4.4

Waanders, M.H. (Marinus) (1203) Thursday 8 May 2025 WIN +0.9

Gerritsen Mulkes, S. (Sven) (1307) Thursday 10 April 2025 WIN +1.9

Maat van de, G.W. (Wim) (1496) Thursday 27 February 2025 WIN +4.8

Lingeman, R. (Rein) (1615) Thursday 13 February 2025 LOSS -16.9

Leppink, G.J. (Gerrit Jan) (1637) Thursday 6 February 2025 DRAW -3.7

Nijstad, L. (Leroy) (1620) Thursday 30 January 2025 WIN +8.2

Gerritsen Mulkes, J. (Jasper) (1440) Thursday 23 January 2025 LOSS -21.5

Smit, J.G. (Gerben) (1468) Thursday 16 January 2025 WIN +4.1

Nijstad, L. (Leroy) (1590) Thursday 7 November 2024 WIN +7.6

Rossel, A. (Aron) (1684) Saturday 12 October 2024 DRAW -2.0

Brinks, G.J. (Jurian) (1672) Thursday 10 October 2024 WIN +10.1

Kruimer, H.J. (Arjen) (1769) Thursday 3 October 2024 LOSS -11.5

Waanders, M.H. (Marinus) (964) Thursday 13 January 2022 WIN +0.4