KNSB FIDE
BO

Bastiaan van Os

Rated since January 2023

1784 Classic
1784 Rapid
1784 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
BAARS, T. (TIJE) 1875
9952 KNSB competitie 2024-2025 Klasse 6 ronde 3 · Saturday 23 November 2024
JELSMA, R. (REMCO) 1818
12993 KNSB competitie 2025-2026 Klasse 6 ronde 6 · Saturday 7 February 2026
VEEN VAN DER, A. (ANNE) 1765
10497 KNSB competitie 2024-2025 Klasse 6 ronde 5 · Saturday 8 February 2025
SASSEN, P. (PELLE) 1738
11995 KNSB competitie 2025-2026 Klasse 6 ronde 1 · Saturday 4 October 2025
BOER, J. (JAN) 1724
10073 KNSB competitie 2024-2025 Klasse 6 ronde 4 · Saturday 14 December 2024
Worst losses
MIJNHEER, J. (JASPER) 1538
6967 KNSB competitie 2022-2023 Klasse 4 ronde 8 · Saturday 1 April 2023
KREULEN, R. (ROEL) 1623
6235 KNSB competitie 2022-2023 Klasse 4 ronde 5 · Saturday 17 December 2022
GOMEZ BECERRA, P.A. (PABLO) 1666
7016 KNSB competitie 2022-2023 Klasse 4 ronde 9 · Saturday 22 April 2023
VROOM, B. (BAUKE) 1693
6168 KNSB competitie 2022-2023 Klasse 4 ronde 4 · Saturday 26 November 2022
SCHEER VAN DER, V. (VALENTIJN) 1704
8347 NOSBO-competitie 2023-2024 Januari 2024 · Friday 26 January 2024
No FIDE-rated tournaments found.
KNSB competitie 2025-2026 Klasse 6 ronde 5 Saturday 20 September 2025 +0–0=1 -2.0
KNSB competitie 2025-2026 Klasse 6 ronde 7 Saturday 20 September 2025 +0–1=0
KNSB competitie 2025-2026 Klasse 6 ronde 6 Saturday 20 September 2025 +1–0=0 +14.1
KNSB competitie 2025-2026 Klasse 6 ronde 4 Saturday 20 September 2025 +1–0=0
KNSB competitie 2025-2026 Klasse 4 Ronde 4 Saturday 20 September 2025 +0–1=0 -9.7
KNSB competitie 2025-2026 Klasse 6 ronde 2 Saturday 20 September 2025 +0–0=1 -5.8
KNSB competitie 2025-2026 Klasse 6 ronde 1 Saturday 20 September 2025 +1–0=0 +11.2
KNSB competitie 2024-2025 Klasse 4 ronde 9 en uitgestelde wedstrijd … Saturday 21 September 2024 +0–1=0 -11.7
KNSB competitie 2024-2025 Klasse 6 ronde 7 Saturday 21 September 2024 +0–1=0 -15.3
KNSB competitie 2024-2025 Klasse 6 ronde 6 Saturday 21 September 2024 +0–0=1 +0.3
KNSB competitie 2024-2025 Klasse 6 ronde 5 Saturday 21 September 2024 +1–0=0 +11.6
KNSB competitie 2024-2025 Klasse 6 ronde 4 Saturday 21 September 2024 +1–0=0 +10.6
KNSB competitie 2024-2025 Klasse 6 ronde 3 Saturday 21 September 2024 +1–0=0 +16.4
KNSB competitie 2024-2025 Klasse 6 ronde 2 Saturday 21 September 2024 +0–0=1 +3.2
KNSB competitie 2024-2025 Klasse 6 ronde 1 Saturday 21 September 2024 +0–0=1 -0.3
KNSB competitie 2024-2025 Klasse 4 ronde 1 Saturday 21 September 2024 +0–0=1 +4.4
NOSBO-competitie 2023-2024 Januari 2024 Sunday 1 October 2023 +0–1=0 -9.9
KNSB competitie 2023-2024 Klasse 6 ronde 7 Saturday 16 September 2023 +0–1=0 -8.7
KNSB competitie 2023-2024 Klasse 6 ronde 6 Saturday 16 September 2023 +0–1=0 -6.2
KNSB competitie 2023-2024 Klasse 5 ronde 5 Saturday 16 September 2023 +0–0=1 +0.3
KNSB competitie 2023-2024 Klasse 6 ronde 3 Saturday 16 September 2023 +1–0=0 +6.9
KNSB competitie 2023-2024 Klasse 6 ronde 2 Saturday 16 September 2023 +0–0=1 -3.5
KNSB competitie 2023-2024 Klasse 6 ronde 1 Saturday 16 September 2023 +1–0=0 +15.2
KNSB competitie 2022-2023 Klasse 4 ronde 9 Saturday 17 September 2022 +0–1=0 -11.5
KNSB competitie 2022-2023 Klasse 4 ronde 8 Saturday 17 September 2022 +0–1=0 -15.9
KNSB competitie 2022-2023 Klasse 4 ronde 7 Saturday 17 September 2022 +0–0=1 -0.8
KNSB competitie 2022-2023 Klasse 4 ronde 6 Saturday 17 September 2022 +0–1=0 -5.8
KNSB competitie 2022-2023 Klasse 4 ronde 5 Saturday 17 September 2022 +0–1=0 -14.2
KNSB competitie 2022-2023 Klasse 4 ronde 4 Saturday 17 September 2022 +0–1=0 -11.6

Rating History

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Peak Ratings

Classic 1803 March 1, 2025
Rapid 1786 March 1, 2026
Blitz 1786 March 1, 2026

Games

Wins 8
Losses 12
Draws 9
Win Rate 28%

Performance by Color

Color Wins Draws Losses Win Rate
White 6 3 7 38%
Black 2 6 5 15%

Recent Matches

Leemrijse, M. (Marius) (1727) Saturday 28 March 2026 DRAW -2.0
Burgsma, A. (Auke) Saturday 7 March 2026 LOSS
Jelsma, R. (Remco) (1818) Saturday 7 February 2026 WIN +14.1
Reijenga, L. (Lars) Saturday 13 December 2025 WIN
Bruinsma, J. (Jura) (1869) Saturday 22 November 2025 LOSS -9.7
Ma, Y.H. (Ying Hao) (1610) Saturday 1 November 2025 DRAW -5.8
Sassen, P. (Pelle) (1738) Saturday 4 October 2025 WIN +11.2
Vroom, B. (Bauke) (1811) Saturday 10 May 2025 LOSS -11.7
Witkamp, T.F. (Theo) (1723) Saturday 5 April 2025 LOSS -15.3
Schuttevaer, T. (Tim) (1812) Saturday 8 March 2025 DRAW +0.3
Veen van der, A. (Anne) (1765) Saturday 8 February 2025 WIN +11.6
Boer, J. (Jan) (1724) Saturday 14 December 2024 WIN +10.6
Baars, T. (Tije) (1875) Saturday 23 November 2024 WIN +16.4
Roersma, D. (Dylan) (1854) Saturday 9 November 2024 DRAW +3.2
Heite, H.R. (Remco) (1752) Saturday 12 October 2024 DRAW -0.3
Dijk van, H. (Henk) (1887) Saturday 21 September 2024 DRAW +4.4
Blok, X. (Xaveer) (1884) Saturday 23 March 2024 LOSS -8.7
Carretero de Jong, A. (Antonio) (1965) Saturday 2 March 2024 LOSS -6.2
Gohil, G. (Viaan) (1627) Saturday 3 February 2024 DRAW +0.3
Scheer van der, V. (Valentijn) (1704) Friday 26 January 2024 LOSS -9.9