KNSB FIDE
SW

Sander Westerlaan

Rated since January 2023

2143 Classic
2143 Rapid
1977 Blitz

RIVALRY

Nemesis
Muller, S.K. (Kenneth)
Games: 3 · Win rate: 0%

The good & the bad

Best wins
KAMPHUIS, J. (JASPER) 2220
12139 Hoogeveen Schaaktoernooi Open · Monday 20 October 2025
DAM TEN, B. (BRAM) (CM) 2205
12139 Hoogeveen Schaaktoernooi Open · Wednesday 22 October 2025
HUMBURG, PHILIPP (FM) 2204
12139 Hoogeveen Schaaktoernooi Open · Tuesday 21 October 2025
CLEMENS, A.H.P. (ADRIAN) (FM) 2117
13118 NOSBO-competitie 2025-2026 ronde 5 (minus één uitgestelde wedstrijd)… · Friday 20 February 2026
ARAVINDHAN, A. (ACHYUTH) (CM) 2117
12139 Hoogeveen Schaaktoernooi Open · Sunday 19 October 2025
Worst losses
SNOEIJER, A.J. (JAN) 1822
8939 NOSBO-competitie 2023-2024 April 2024 · Friday 5 April 2024
BLOEMHOF, R.B.P. (RUBEN) 1846
NOSBO snelschaaktoernooi teams 2024 · Saturday 14 September 2024
WEPEREN VAN, J.J. (JOS) 1866
6841 NOSBO competitie 2022-2023 Maart 2023 · Tuesday 14 March 2023
ERTABAK, A. (ARAL) 1901
8453 Chess Festival Groningen Open B · Monday 30 December 2024
LOGTMEIJER, M.A. (MAURITS) 1917
NOSBO snelschaaktoernooi teams 2024 · Saturday 14 September 2024
Hoogeveen Schaaktoernooi Open Saturday 18 October 2025 +4–5=0 +30.3
Chess Festival Groningen Open B Saturday 21 December 2024 +6–2=1 +27.5
Hoogeveen Schaaktoernooi Open Groep Saturday 26 October 2024 +2–5=1 -8.7
Chess Festival Groningen Open B Thursday 21 December 2023 +4–3=2 -22.0
Weekendtoernooi Groninger Combinatie / PK NOSBO Groep A Thursday 18 May 2023 +3–1=2 +14.2
NOSBO-competitie 2025-2026 ronde 5 (minus één uitgestelde wedstrijd)… Monday 16 February 2026 +1–0=0 +11.9
NOSBO-competitie 2025-2026 ronde 4 Groep A Monday 19 January 2026 +1–0=0 +8.0
NOSBO-competitie 2025-2026 ronde 3 Groep A Friday 28 November 2025 +1–0=0 +9.1
NOSBO-competitie 2025-2026 ronde 2 Groep A Monday 10 November 2025 +0–0=1 -1.7
NOSBO-beker 2025-2026 ronde 1 Groep A Monday 3 November 2025 +1–0=0 +10.0
NOSBO-competitie 2025-2026 ronde 1 Hoofdklasse Monday 13 October 2025 +0–1=0 -13.7
KNSB competitie 2025-2026 Klasse 4 ronde 7 Saturday 20 September 2025 +1–0=0 +6.6
KNSB competitie 2025-2026 Klasse 4 ronde 5 Saturday 20 September 2025 +1–0=0 +11.6
KNSB competitie 2025-2026 Klasse 4 Ronde 4 Saturday 20 September 2025 +0–1=0 -13.6
KNSB competitie 2025-2026 Klasse 4 ronde 3 Saturday 20 September 2025 +0–0=1 -7.4
KNSB competitie 2025-2026 Klasse 4 ronde 2 Saturday 20 September 2025 +1–0=0 +6.1
KNSB competitie 2025-2026 Klasse 4 ronde 1 Saturday 20 September 2025 +1–0=0 +7.1
NOSBO competitie 2024-2025 April 2025 Saturday 1 March 2025 +0–0=1 -8.3
NOSBO competitie 2024-2025 Januari 2025 Monday 13 January 2025 +1–0=0 +4.0
NOSBO competitie 2024-2025 Maart 2025 Wednesday 1 January 2025 +1–0=0 +13.0
NOSBO competitie 2024-2025 Februari 2025 Wednesday 1 January 2025 +0–1=1 -17.6
NOSBO competitie 2024-2025 December 2024 Monday 25 November 2024 +0–0=1 -0.9
NOSBO competitie 2024-2025 November 2024 Monday 14 October 2024 +1–0=0 +8.8
KNSB competitie 2024-2025 Klasse 4 ronde 9 en uitgestelde wedstrijd … Saturday 21 September 2024 +0–0=1 +1.9
KNSB competitie 2024-2025 Klasse 4 ronde 8 Saturday 21 September 2024 +0–0=1 -6.4
KNSB competitie 2024-2025 Klasse 4 ronde 7 Saturday 21 September 2024 +0–0=1 -5.8
KNSB competitie 2024-2025 Klasse 4 ronde 6 Saturday 21 September 2024 +1–0=0 +6.7
KNSB competitie 2024-2025 Klasse 4 ronde 5 Saturday 21 September 2024 +1–0=0 +8.2
KNSB competitie 2024-2025 Klasse 4 ronde 4 Saturday 21 September 2024 +1–0=0 +13.7
KNSB competitie 2024-2025 Klasse 4 ronde 3 Saturday 21 September 2024 +1–0=0 +9.6
KNSB competitie 2024-2025 Klasse 4 ronde 2 Saturday 21 September 2024 +0–0=1 +3.3
KNSB competitie 2024-2025 Klasse 4 ronde 1 Saturday 21 September 2024 +1–0=0 +13.9
NOSBO snelschaaktoernooi teams 2024 Saturday 14 September 2024 +8–5=0 -34.6
NOSBO-competitie 2023-2024 Mei 2024 Sunday 1 October 2023 +1–0=0 +7.8
NOSBO-competitie 2023-2024 April 2024 Sunday 1 October 2023 +1–1=1 -5.0
NOSBO-competitie 2023-2024 Maart 2024 Sunday 1 October 2023 +1–0=0 +10.9
NOSBO-competitie 2023-2024 Februari 2024 Sunday 1 October 2023 +2–0=0 +12.5
NOSBO-competitie 2023-2024 Januari 2024 Sunday 1 October 2023 +0–0=1 -3.1
NOSBO-competitie 2023-2024 December 2023 Sunday 1 October 2023 +1–0=0 +12.5
KNSB competitie 2023-2024 Klasse 3 ronde 9 Saturday 16 September 2023 +0–0=1 -3.0
KNSB competitie 2023-2024 Klasse 3 ronde 8 Saturday 16 September 2023 +1–0=0 +8.6
KNSB competitie 2023-2024 Klasse 3 ronde 7 Saturday 16 September 2023 +0–1=0 -5.8
KNSB competitie 2023-2024 Klasse 3 ronde 6 Saturday 16 September 2023 +0–1=0 -11.0
KNSB competitie 2023-2024 Klasse 3 ronde 5 Saturday 16 September 2023 +1–0=0 +11.4
KNSB competitie 2023-2024 Klasse 3 ronde 3 Saturday 16 September 2023 +1–0=0 +14.2
KNSB competitie 2023-2024 Klasse 3 ronde 2 Saturday 16 September 2023 +0–1=0 -13.8
Chess Festival Groningen Open A Wednesday 21 December 2022 +2–5=2 -10.7
NOSBO competitie 2022-2023 April 2023 Monday 24 October 2022 +1–0=0 +9.1
NOSBO competitie 2022-2023 Maart 2023 Monday 24 October 2022 +0–1=0 -16.7
NOSBO competitie 2022-2023 Februari 2023 Monday 24 October 2022 +0–1=0 -14.8
NOSBO competitie 2022-2023 Januari 2023 Monday 24 October 2022 +1–0=1 +10.4
NOSBO competitie 2022-2023 Januari 2023 - beker Monday 24 October 2022 +0–1=0 -5.5

Rating History

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Peak Ratings

Classic 2143 April 1, 2026
Rapid 2143 April 1, 2026
Blitz 1977 Oct. 1, 2024

Games

Wins 56
Losses 36
Draws 21
Win Rate 50%

Performance by Color

Color Wins Draws Losses Win Rate
White 30 13 17 50%
Black 26 8 19 49%

Recent Matches

FM Clemens, A.H.P. (Adrian) (2117) Friday 20 February 2026 WIN +11.9
Hamond van, A.H.M. (Fons) (1950) Saturday 7 February 2026 WIN +6.6
Voss, J.H. (Herman) (1984) Monday 19 January 2026 WIN +8.0
Stavast, D.W. (Dick) (2055) Saturday 13 December 2025 WIN +11.6
Wielenga, W. (Wiebe) (2008) Tuesday 2 December 2025 WIN +9.1
Muller, S.K. (Kenneth) (2070) Saturday 22 November 2025 LOSS -13.6
Salihbegovic, E. (Edim) (2056) Friday 14 November 2025 DRAW -1.7
Jong de, M. (Mathijs) (2035) Thursday 6 November 2025 WIN +10.0
Baars, T. (Tije) (1865) Saturday 1 November 2025 DRAW -7.4
Veelen van, T.J. (Thomas) (2088) Saturday 25 October 2025 LOSS -12.3
CM Kukushkin, Ivan (2210) Friday 24 October 2025 LOSS -8.2
GM Raja Harshit (2476) Thursday 23 October 2025 LOSS -2.1
CM Dam ten, B. (Bram) (2205) Wednesday 22 October 2025 WIN +16.7
GM Miezis, N. (Normunds) (2374) Wednesday 22 October 2025 LOSS -3.8
FM Humburg, Philipp (2204) Tuesday 21 October 2025 WIN +16.7
Kamphuis, J. (Jasper) (2220) Monday 20 October 2025 WIN +17.2
CM Aravindhan, A. (Achyuth) (2117) Sunday 19 October 2025 WIN +13.8
Dordevic, Tom (2224) Saturday 18 October 2025 LOSS -7.7
Mostertman, X.V. (Xander) (2048) Thursday 16 October 2025 LOSS -13.7
Teuben, J.T. (Jan) (1882) Saturday 4 October 2025 WIN +6.1