KNSB FIDE
WP

Wim Posthumus

Rated since January 2023

1940 Classic
1951 Rapid
1951 Blitz

RIVALRY

Nemesis
Verdonschot, J.N. (Jonas)
Games: 3 · Win rate: 100%
Easy Target
As van, C.J. (Cor)
Games: 3 · Win rate: 100%

The good & the bad

Best wins
STEIJN VAN, L.C.J. (HANS) 1968
10705 KNSB competitie 2024-2025 Klasse 5 ronde 6 · Saturday 8 March 2025
STURM, P.H. (PIETER) 1925
8538 S.V. Erasmus interne competitie 22-01-2024 t/m 19-02-2024 (140014) · Monday 29 January 2024
JAGER DE, L. (LEO) 1911
8766 S.V. Erasmus interne competitie 26-02-2024 t/m 25-03-2024 (140014) · Monday 4 March 2024
OKITA, S. (SHINSAKU) 1880
10496 KNSB competitie 2024-2025 Klasse 5 ronde 5 · Saturday 8 February 2025
SCHAKEL, T. (TIJMEN) 1869
13315 KNSB competitie 2025-2026 Klasse 5 ronde 5 · Saturday 28 March 2026
Worst losses
POL VAN DER, T. (THEO) 1558
7806 KNSB competitie 2023-2024 Klasse 5 ronde 3 · Saturday 25 November 2023
ZUURMOND, D. (DEREK) 1560
7206 Watertorentoernooi Ronde 4 t/m 7 · Monday 8 May 2023
TJEPKEMA, M. (MARCO) 1563
7641 KNSB competitie 2023-2024 Klasse 5 ronde 1 · Saturday 7 October 2023
DUYNKERKE, L.J. (LENNARD) 1657
6169 KNSB competitie 2022-2023 Klasse 5 ronde 3 · Saturday 26 November 2022
LANDSHEER, J. (JEROEN) 1713
6620 S.V. Erasmus interne competitie 16-01-2023 t/m 20-02-2023 (140014) · Monday 20 February 2023
Tata Steel Chess Tournament 2025 Weekendvierkampen Friday 17 January 2025 +1–1=1 -5.0
Tata Steel Chess Tournament 2024 Weekendvierkampen Friday 12 January 2024 +1–1=1 +6.6
Tata Steel Chess Tournament 2023 Tienkampen Friday 13 January 2023 +3–3=3 +23.1
S.V. Erasmus interne competitie 30-03-2026 t/m 20-04-2026 (140014) Monday 16 February 2026 +2–1=0 -10.5
S.V. Erasmus interne competitie 16-02-2026 t/m 23-03-2026 (140014) Monday 16 February 2026 +10–0=2 +25.1
KNSB competitie 2025-2026 Klasse 5 ronde 5 Saturday 20 September 2025 +2–0=0 +21.6
KNSB competitie 2025-2026 Klasse 5 ronde 7 Saturday 20 September 2025 +2–0=0 +19.8
KNSB competitie 2025-2026 Klasse 5 ronde 6 Saturday 20 September 2025 +1–0=0 +6.6
KNSB competitie 2024-2025 Klasse 5 ronde 7 Saturday 21 September 2024 +1–0=0 +9.1
KNSB competitie 2024-2025 Klasse 5 ronde 6 Saturday 21 September 2024 +1–0=0 +15.3
KNSB competitie 2024-2025 Klasse 5 ronde 5 Saturday 21 September 2024 +1–0=0 +12.7
KNSB competitie 2024-2025 Klasse 5 ronde 4 Saturday 21 September 2024 +0–1=0 -15.6
KNSB competitie 2024-2025 Klasse 5 ronde 3 Saturday 21 September 2024 +0–1=0 -14.2
KNSB competitie 2024-2025 Klasse 5 ronde 2 Saturday 21 September 2024 +1–0=0 +5.0
KNSB competitie 2024-2025 Klasse 5 ronde 1 Saturday 21 September 2024 +1–0=0 +7.2
Erasmus Watertorentoernooi Groep A Ronde 6 t/m 7 Monday 15 April 2024 +0–1=1 -13.4
Erasmus Watertorentoernooi Groep A Ronde 3 t/m 5 Monday 15 April 2024 +2–0=0 +11.1
Erasmus Watertorentoernooi Groep A Ronde 1 t/m 2 Monday 15 April 2024 +1–1=0 +1.9
S.V. Erasmus interne competitie 08-04-2024 t/m 08-04-2024 (140014) Monday 22 January 2024 +0–0=1 +5.3
S.V. Erasmus interne competitie 26-02-2024 t/m 25-03-2024 (140014) Monday 22 January 2024 +1–0=0 +13.0
S.V. Erasmus interne competitie 22-01-2024 t/m 19-02-2024 (140014) Monday 22 January 2024 +2–2=0 +17.7
KNSB competitie 2023-2024 Klasse 5 ronde 7 Saturday 16 September 2023 +0–1=0 -15.5
KNSB competitie 2023-2024 Klasse 5 ronde 6 Saturday 16 September 2023 +0–0=1 -2.0
KNSB competitie 2023-2024 Klasse 5 ronde 5 Saturday 16 September 2023 +1–0=0 +11.7
KNSB competitie 2023-2024 Klasse 5 ronde 4 Saturday 16 September 2023 +1–0=0 +8.5
KNSB competitie 2023-2024 Klasse 5 ronde 3 Saturday 16 September 2023 +0–1=0 -19.8
KNSB competitie 2023-2024 Klasse 5 ronde 2 Saturday 16 September 2023 +1–0=0 +12.9
KNSB competitie 2023-2024 Klasse 5 ronde 1 Saturday 16 September 2023 +0–1=0 -20.1
49e Seniorentoernooi Groep 2 Saturday 15 July 2023 +3–0=1 +38.8
Watertorentoernooi Ronde 4 t/m 7 Monday 3 April 2023 +2–2=0 -25.2
Watertorentoernooi Watertoren Monday 3 April 2023 +2–1=0 -2.7
S.V. Erasmus interne competitie 27-02-2023 t/m 27-03-2023 (140014) Monday 16 January 2023 +3–1=0 +16.2
S.V. Erasmus interne competitie 16-01-2023 t/m 20-02-2023 (140014) Monday 16 January 2023 +2–1=1 +7.0
KNSB competitie 2022-2023 Klasse 5 ronde 7 Saturday 17 September 2022 +0–0=1 -5.8
KNSB competitie 2022-2023 Klasse 5 ronde 6 Saturday 17 September 2022 +0–1=0 -9.6
KNSB competitie 2022-2023 Klasse 5 ronde 5 Saturday 17 September 2022 +1–0=0 +0.2
KNSB competitie 2022-2023 Klasse 5 ronde 4 Saturday 17 September 2022 +0–1=0 -7.7
KNSB competitie 2022-2023 Klasse 5 ronde 3 Saturday 17 September 2022 +0–1=0 -8.7
RSB Competitie 2022-2023 8-tallen juni Thursday 1 September 2022 +0–1=0 -14.7

Rating History

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Peak Ratings

Classic 1951 April 1, 2026
Rapid 1951 April 1, 2026
Blitz 1951 April 1, 2026

Games

Wins 49
Losses 24
Draws 13
Win Rate 57%

Performance by Color

Color Wins Draws Losses Win Rate
White 19 8 13 48%
Black 30 5 11 65%

Recent Matches

Stroosma, H. (Harry) (1729) Monday 20 April 2026 LOSS -19.5
Fernandes Coelho Ramos, L.F. (Luciano) Monday 13 April 2026 WIN
Jong de, J.H.A. (Jesse) (1816) Monday 30 March 2026 WIN +9.0
Schakel, T. (Tijmen) (1869) Saturday 28 March 2026 WIN +10.8
Schakel, T. (Tijmen) (1869) Saturday 28 March 2026 WIN +10.8
Verdonschot, J.N. (Jonas) (1796) Monday 23 March 2026 WIN +8.4
Verdonschot, J.N. (Jonas) (1796) Monday 23 March 2026 WIN +8.4
Vos, S.J. (Siebren) Monday 16 March 2026 WIN
Vos, S.J. (Siebren) Monday 16 March 2026 WIN
Holtkamp, J.H.G. (Jorg) Monday 9 March 2026 WIN
Holtkamp, J.H.G. (Jorg) Monday 9 March 2026 WIN
Vlokhoven van, F.J.M. (Franka) (1842) Saturday 7 March 2026 WIN +9.9
Vlokhoven van, F.J.M. (Franka) (1842) Saturday 7 March 2026 WIN +9.9
As van, C.J. (Cor) (1656) Monday 2 March 2026 WIN +4.5
As van, C.J. (Cor) (1656) Monday 2 March 2026 WIN +4.5
Aarnoudse, P. (Peter) (1756) Monday 23 February 2026 DRAW -5.2
Aarnoudse, P. (Peter) (1756) Monday 23 February 2026 DRAW -5.2
Tchavelachvili, A.G. (Alik) (1664) Monday 16 February 2026 WIN +4.8
Tchavelachvili, A.G. (Alik) (1664) Monday 16 February 2026 WIN +4.8
Weber, B. (Bas) (1732) Saturday 7 February 2026 WIN +6.6