KNSB FIDE
BO

Ben van Os

Rated since January 2023

1861 Classic
1866 Rapid
1866 Blitz

RIVALRY

Nemesis
Janssen, E.J. (Eddie)
Games: 3 · Win rate: 67%

The good & the bad

Best wins
MULDER, P.W. (PIET) 1865
6555 KNSB competitie 2022-2023 Klasse 3 ronde 6 · Saturday 11 February 2023
TASMA, A.W. (ANDREAS) 1793
6604 NOSBO competitie 2022-2023 Februari 2023 · Friday 10 February 2023
BOS, R.R.J. (ROBIN) 1770
6841 NOSBO competitie 2022-2023 Maart 2023 · Friday 24 March 2023
JANSSEN, E.J. (EDDIE) 1757
13423 NOSBO-competitie 2025-2026 ronde 6 (minus één uitgestelde wedstrijd)… · Thursday 19 March 2026
TIMMEREN VAN, M.S. (MARTIN) 1733
12098 NOSBO-competitie 2025-2026 ronde 1 Klasse 2B · Friday 17 October 2025
Worst losses
SPIJKER VAN, J. (JAN) 1703
11330 NOSBO competitie 2024-2025 Mei 2025 · Monday 12 May 2025
GRAAF VAN DER, J.F. (JAAP) 1733
7319 Nazomervierkampentoernooi 2023 Schaakclub Assen Groep A · Friday 25 August 2023
NIEMEIJER, L. (LÉON) 1781
7319 Nazomervierkampentoernooi 2023 Schaakclub Assen Groep A · Saturday 26 August 2023
AMBRONA NAVARRO, H.A.N. (HIMAR) 1812
7319 Nazomervierkampentoernooi 2023 Schaakclub Assen Groep A · Saturday 26 August 2023
TIMMER, M. (MICHEL) 1886
9015 NOSBO-competitie 2023-2024 Mei 2024 · Thursday 16 May 2024
Nazomervierkampentoernooi 2023 Schaakclub Assen Groep A Friday 25 August 2023 +0–3=0 -32.8
NOSBO-competitie 2025-2026 ronde 6 (minus één uitgestelde wedstrijd)… Monday 16 March 2026 +2–0=0 +18.5
NOSBO-competitie 2025-2026 ronde 5 (minus één uitgestelde wedstrijd)… Monday 16 February 2026 +1–0=0 +3.0
NOSBO-competitie 2025-2026 ronde 4 Groep A Monday 19 January 2026 +0–0=1 -6.6
NOSBO-competitie 2025-2026 ronde 3 Groep A Friday 28 November 2025 +0–0=1 -0.4
NOSBO-competitie 2025-2026 ronde 2 Groep A Monday 10 November 2025 +1–0=0 +6.0
NOSBO-competitie 2025-2026 ronde 1 Klasse 2B Monday 13 October 2025 +1–0=0 +8.8
NOSBO competitie 2024-2025 April 2025 Saturday 1 March 2025 +0–0=1 -3.7
NOSBO competitie 2024-2025 Januari 2025 Monday 13 January 2025 +1–0=0 +7.3
NOSBO competitie 2024-2025 Mei 2025 Wednesday 1 January 2025 +0–1=0 -17.7
NOSBO competitie 2024-2025 Februari 2025 Wednesday 1 January 2025 +1–0=0 +4.8
NOSBO competitie 2024-2025 December 2024 Monday 25 November 2024 +0–0=1 -8.4
NOSBO-competitie 2023-2024 Mei 2024 Sunday 1 October 2023 +0–1=0 -12.0
NOSBO-competitie 2023-2024 April 2024 Sunday 1 October 2023 +1–0=0 +5.4
NOSBO-competitie 2023-2024 Maart 2024 Sunday 1 October 2023 +1–0=0 +6.4
NOSBO-competitie 2023-2024 Februari 2024 Sunday 1 October 2023 +1–0=0 +4.6
NOSBO-competitie 2023-2024 December 2023 Sunday 1 October 2023 +1–0=0 +6.2
NOSBO competitie 2023-2024 November 2023 Sunday 1 October 2023 +1–0=0 +3.0
NOSBO competitie 2022-2023 Maart 2023 Monday 24 October 2022 +2–0=0 +15.7
NOSBO competitie 2022-2023 Februari 2023 Monday 24 October 2022 +2–0=0 +17.2
KNSB competitie 2022-2023 Klasse 3 ronde 6 Saturday 17 September 2022 +1–0=0 +16.9

Rating History

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Peak Ratings

Classic 1871 May 1, 2024
Rapid 1866 March 1, 2026
Blitz 1866 March 1, 2026

Games

Wins 17
Losses 5
Draws 4
Win Rate 65%

Performance by Color

Color Wins Draws Losses Win Rate
White 12 2 1 80%
Black 5 2 4 45%

Recent Matches

Janssen, E.J. (Eddie) (1757) Thursday 19 March 2026 WIN +9.2
Janssen, E.J. (Eddie) (1757) Thursday 19 March 2026 WIN +9.2
Peek, J.C. (Jan) (1511) Friday 20 February 2026 WIN +3.0
Boer de, F. (Ferdi) (1649) Tuesday 20 January 2026 DRAW -6.6
Snoeijer, A.J. (Jan) (1838) Friday 28 November 2025 DRAW -0.4
Posthuma, H. (Hiltjo) (1649) Friday 14 November 2025 WIN +6.0
Timmeren van, M.S. (Martin) (1733) Friday 17 October 2025 WIN +8.8
Spijker van, J. (Jan) (1703) Monday 12 May 2025 LOSS -17.7
Janssen, E.J. (Eddie) (1755) Friday 11 April 2025 DRAW -3.7
Luijkx, D.M. (Dagmar) (1610) Thursday 6 February 2025 WIN +4.8
Harmanny, W. (Wim) (1696) Tuesday 21 January 2025 WIN +7.3
Souhoka, J. (John) (1578) Friday 29 November 2024 DRAW -8.4
Timmer, M. (Michel) (1886) Thursday 16 May 2024 LOSS -12.0
Veninga, J.G. (Jaap) (1643) Thursday 18 April 2024 WIN +5.4
Huls, L. (Luit) (1674) Tuesday 19 March 2024 WIN +6.4
Harmanny, W. (Wim) (1503) Tuesday 30 January 2024 WIN +4.6
Werff van der, C. (Cor) (1560) Friday 8 December 2023 WIN +6.2
Essen van, T.D. (Tobias) (1415) Friday 17 November 2023 WIN +3.0
Niemeijer, L. (Léon) (1781) Saturday 26 August 2023 LOSS -12.7
Ambrona Navarro, H.A.N. (Himar) (1812) Saturday 26 August 2023 LOSS -5.8