WK

Wart Koopman

Rated since January 2023

1750 Classic
1582 Rapid
1375 Blitz

RIVALRY

Nemesis
Kulyk, H. (Hlib)
Games: 6 · Win rate: 50%
Kryptonite
Schaaphok, J. (Jelmer)
Games: 4 · Win rate: 0%
Easy Target
Roeten, T.J. (Thomas)
Games: 4 · Win rate: 100%

The good & the bad

Best wins
BOSVELD, M. (MATTIAS) 1856
11592 NOSBO JCC ONNJK · Saturday 5 July 2025
HOUPST, C.H.J. (CHRISTIAAN) 1837
12594 KNSB competitie 2025-2026 Klasse 5 ronde 4 · Saturday 13 December 2025
LINGER, Z. (ZAMEE) 1758
12557 GP Staunton Groningen Groep A · Sunday 28 December 2025
ROOIJAKKERS, L. (LIAM) 1755
10713 KNSB-Jeugdclubcompetitie 1, AC Groepen A en C · Saturday 27 September 2025
HOUPST, S. (SEBASTIAAN) 1750
12109 GP DTK Buitenpost 2025 Groep A · Saturday 18 October 2025
Worst losses
GREVEN, N. (NOA) 481
6484 GP Bolsward Groep A · Saturday 21 January 2023
OLIVEIRO, N.E. (NOE) 486
6278 GP Sint-Jabik Groep A · Saturday 17 December 2022
LIPSIC, T. (THOMAS) 496
6484 GP Bolsward Groep A · Saturday 21 January 2023
DELLEN VAN, T. (THIJMEN) 504
6351 NOSBO GP Chessfestival 2022 GP Chessfestival 2022 · Wednesday 28 December 2022
RADEMAKER, S. (SVEN) 534
6484 GP Bolsward Groep A · Saturday 21 January 2023
Open groep Paardensprongtoernooi 2016 Groep A Saturday 18 April 2026 +5–3=0 -26.7
GP Staunton Groningen Groep A Sunday 28 December 2025 +1–4=0 -62.0
GP Staunton Chessfestival 2024 Groep A Saturday 28 December 2024 +5–0=0 +93.6
GP Chessfestival Groningen, 2023 Thursday 28 December 2023 +3–2=2 +6.2
NOSBO-FSB GP finale 2026 Groep A Saturday 27 June 2026 +1–5=1 -87.0
GP Oldenkamp 2026 Groep A Saturday 9 May 2026 +0–5=0 -94.8
GP Schaakwoude 2026 Groep A Saturday 4 April 2026 +3–1=1 +39.3
GP Emmen 2026 Groep A Saturday 14 March 2026 +3–1=1 +30.2
GP Hennie Collignon 2026 Groep A Saturday 31 January 2026 +2–2=1 +6.0
GP de Donger Groep A Saturday 10 January 2026 +3–2=1 -4.6
KNSB-Jeugdclubcompetitie 4, AC Groep A Saturday 6 December 2025 +1–0=0
KNSB-Jeugdclubcompetitie 3, AC Groep A Saturday 15 November 2025 +0–2=0
KNSB-Jeugdclubcompetitie D halve finales Groep A Saturday 8 November 2025 +0–3=1 -47.6
GP DTK Buitenpost 2025 Groep A Saturday 18 October 2025 +5–0=0 +113.4
Huttontoernooi Groep D Saturday 11 October 2025 +2–2=1 -18.9
KNSB-Jeugdclubcompetitie 1, AC Groepen A en C Saturday 27 September 2025 +1–1=0
KNSB competitie 2025-2026 Klasse 5 ronde 7 Saturday 20 September 2025 +0–1=0 -36.6
KNSB competitie 2025-2026 Klasse 5 ronde 6 Saturday 20 September 2025 +0–1=0 -45.0
KNSB competitie 2025-2026 Klasse 5 ronde 4 Saturday 20 September 2025 +1–0=0
KNSB competitie 2025-2026 Klasse 5 ronde 1 Saturday 20 September 2025 +0–1=0
GP Lytje Willem 2025 Groep A Saturday 20 September 2025 +2–2=1 -4.6
GP Haren Groep A Saturday 13 September 2025 +0–3=1 -51.2
GP Finale NOSBO-FSB 2025 Groep A Sunday 15 June 2025 +0–4=1 -42.6
GP Hoogeveen 2025 Groep A Saturday 17 May 2025 +3–0=2 +47.7
GP Schaakwoude 2025 Groep A Saturday 19 April 2025 +0–4=1 -56.2
Paardensprong Open groep 2025 Groep A Saturday 15 February 2025 +6–1=1 -10.1
NOSBO JCC ONNJK Wednesday 1 January 2025 +3–2=2 +54.9
NOSBO JCC JCC C Wednesday 1 January 2025 +5–2=0 +5.1
NOSBO JCC JCC D Wednesday 1 January 2025 +4–3=0 -46.0
GP De Donger Groep A Saturday 21 December 2024 +2–5=0 -60.6
GP Bolsward 2024 Groep A Saturday 7 December 2024 +4–1=0 +60.9
GP Twee Kastelen 2024 Groep A Saturday 30 November 2024 +7–0=0 +113.2
Hutton Groep D Sunday 3 November 2024 +2–2=0 +2.6
GP Ten Boer 2024 Groep A Saturday 2 November 2024 +1–4=0 -56.4
Lytje Willem GP 2024 Groep A Saturday 19 October 2024 +2–4=1 -47.0
GP Leek/Roden 2024 Groep A Saturday 12 October 2024 +2–3=0 -18.8
GP-finale NOSBO-FSB 2024 Groep A Sunday 9 June 2024 +3–3=1 -17.5
GP Bob Romijn Haren 2024 Groep A Saturday 1 June 2024 +3–1=1 +30.1
GP Jan Oldenkamp 2024 Groep A Saturday 18 May 2024 +3–2=0 +32.5
GP NK-ABC 2024 Hoogkerk Groep A Thursday 2 May 2024 +3–1=1 +19.7
GP Schaakwoude Groep A Friday 29 March 2024 +5–1=1 +39.0
GP Emmen 2024 Groep A Saturday 16 March 2024 +4–1=1 +24.2
GP Assen Groep A Sunday 18 February 2024 +3–4=0 +3.7
GP Sint Jabik 2023 Groep A Saturday 16 December 2023 +1–5=0 -68.6
GP Bolsward 9 dec 2023 Groep A Saturday 9 December 2023 +4–2=1 +27.4
KNSB-Jeugdclubcompetitie Finale E Groep E Saturday 11 November 2023 +3–4=0 -16.1
NOSBO FSB jeugd 2023-2024 PJK D Wednesday 1 November 2023 +3–3=1 -11.0
NOSBO FSB jeugd 2023-2024 Paardensprong Opengroep Wednesday 1 November 2023 +5–3=0 +55.6
GP Buitenpost 2023 Groep A Saturday 28 October 2023 +1–5=1 -49.3
GP Leek-Roden Groep A Saturday 7 October 2023 +3–3=1 +34.7
KNSB-Jeugdclubcompetitie E Halve Finales Groep E Saturday 23 September 2023 +3–4=0 -3.9
NOSBO GP-finale 2023 Groep A Sunday 11 June 2023 +4–2=1 -9.2
GP Jan Oldenkamp 2023 Groep A Saturday 3 June 2023 +3–4=0 -22.3
Emmen GP 2023 Groep A Saturday 4 March 2023 +2–3=2 -28.1
Paardensprong jeugdtoernooi Opengroep Saturday 4 February 2023 +5–3=0 +41.2
GP Bolsward Groep A Saturday 21 January 2023 +3–3=1 -19.7
NOSBO PJK 2023 PJK E Saturday 14 January 2023 +4–3=0 +17.2
GP voor de jeugd Dokkum Groep A Saturday 7 January 2023 +4–3=0 +41.7
NOSBO FSB 2022-2023 ONNJK 2023 Sunday 1 January 2023 +4–3=0 +25.5
NOSBO FSB 2022-2023 JCC - D Sunday 1 January 2023 +5–2=0 +39.8
NOSBO FSB 2022-2023 NJC JCC - E Sunday 1 January 2023 +1–5=2 -26.3
NOSBO GP Chessfestival 2022 GP Chessfestival 2022 Wednesday 28 December 2022 +6–1=0 +50.8
GP Sint-Jabik Groep A Saturday 17 December 2022 +2–3=0 -17.7

Team Competition

Current team
De Paardensprong 1
Klasse 5A · 2025-2026 · 4 games

Rating History

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Peak Ratings

Classic 1805 Jan. 1, 2026
Rapid 1740 Nov. 1, 2025
Blitz 1375 March 1, 2026

Games

Wins 169
Losses 153
Draws 34
Win Rate 47%

Performance by Color

Color Wins Draws Losses Win Rate
White 86 16 71 50%
Black 83 18 82 45%

Recent Matches

Kloosterman, F. (Frank) (1656) Saturday 27 June 2026 DRAW +0.4
Sarathbabu, M. (Mrityunjay) (1684) Saturday 27 June 2026 LOSS -18.1
Zeng, H. (Henry) (1685) Saturday 27 June 2026 LOSS -18.0
Tanasale, J. (Jona) (1539) Saturday 27 June 2026 LOSS -26.0
Boer de, C. (Chantal) (1580) Saturday 27 June 2026 LOSS -23.8
Noback, J. (Jorrit) (1617) Saturday 27 June 2026 LOSS -21.8
Douma, J. (Jente) (1653) Saturday 27 June 2026 WIN +20.2
Boomhouwer, R. (Rens) (1786) Saturday 9 May 2026 LOSS -17.1
Pijper, J. (Jesse) (1722) Saturday 9 May 2026 LOSS -20.7
Schuls, O. (Olav) (1750) Saturday 9 May 2026 LOSS -19.1
Zeng, H. (Henry) (1750) Saturday 9 May 2026 LOSS -19.1
Nair, P. (Pranav Prasobh) (1756) Saturday 9 May 2026 LOSS -18.8
Schuls, O. (Olav) (1730) Saturday 18 April 2026 LOSS -17.3
Schipper, S. (Sarah) (1284) Saturday 18 April 2026 WIN +3.3
Wessels, Keke (1896) Saturday 18 April 2026 LOSS -9.0
Kuipers, T. (Timo) (1249) Saturday 18 April 2026 WIN +2.6
Boomhouwer, R. (Rens) (1752) Saturday 18 April 2026 LOSS -16.1
Jong de, H. (Hannah) (1387) Saturday 18 April 2026 WIN +6.1
Roeten, H.B. (Hugo) (1283) Saturday 18 April 2026 WIN +3.3
Pijper, J. (Joanne) (1024) Saturday 18 April 2026 WIN +0.4