KNSB FIDE
JB

Jan Bosma

Rated since January 2023

2034 Classic
2057 Rapid
2057 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
WIERENGA, L.R.M. (LUUK) 2118
9780 Amsterdam Chess Open Groep A · Saturday 25 October 2025
MULEKOM VAN, H. (HANS) 1891
6553 KNSB competitie 2022-2023 Klasse 1 ronde 6 · Saturday 11 February 2023
BAAK, K.L. (KARL) 1773
6717 HSB competitie 2022-2023 HSB competitie 2022-2023 deel 5 · Monday 6 February 2023
Worst losses
THEIJN, D. (DAVE) 1843
7000 HSB competitie 2022-2023 HSB competitie 2022-2023 ronde 6 en 7 · Wednesday 19 April 2023
CHEUNG, Y.W. (JAN) 2059
7000 HSB competitie 2022-2023 HSB competitie 2022-2023 ronde 6 en 7 · Monday 6 March 2023
FINKENFLUGEL, R.C. (RENZO) 2076
9780 Amsterdam Chess Open Groep A · Sunday 26 October 2025
PAPROCKI, JAROSLAW 2115
9780 Amsterdam Chess Open Groep A · Friday 24 October 2025
BATTISTELLI, FAUSTO 2144
9780 Amsterdam Chess Open Groep A · Friday 24 October 2025
Amsterdam Chess Open Groep A Friday 24 October 2025 +1–4=1 -23.2
KNSB competitie 2022-2023 Klasse 1 ronde 6 Saturday 17 September 2022 +1–0=0 +6.3
KNSB competitie 2022-2023 Klasse 1 ronde 5 Saturday 17 September 2022 +0–1=0 -10.1
HSB competitie 2022-2023 HSB competitie 2022-2023 ronde 6 en 7 Monday 29 August 2022 +0–2=0 -33.7
HSB competitie 2022-2023 HSB competitie 2022-2023 deel 5 Monday 29 August 2022 +1–0=0 +3.5
HSB competitie 2022-2023 HSB competitie 2022-2023 deel 4 Monday 29 August 2022 +0–1=0 -9.5
HSB competitie 2022-2023 HSB beker ronde 1 en 2 Monday 29 August 2022 +1–0=0

Rating History

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Peak Ratings

Classic 2091 April 1, 2023
Rapid 2057 March 1, 2026
Blitz 2057 March 1, 2026

Games

Wins 4
Losses 8
Draws 1
Win Rate 31%

Performance by Color

Color Wins Draws Losses Win Rate
White 2 0 4 33%
Black 2 1 4 29%

Recent Matches

Sefton, Adam (2146) Sunday 26 October 2025 DRAW +3.1
Finkenflugel, R.C. (Renzo) (2076) Sunday 26 October 2025 LOSS -11.8
Wierenga, L.R.M. (Luuk) (2118) Saturday 25 October 2025 WIN +14.6
Smid, J. (Jelle) (2159) Saturday 25 October 2025 LOSS -9.0
Paprocki, Jaroslaw (2115) Friday 24 October 2025 LOSS -10.5
Battistelli, Fausto (2144) Friday 24 October 2025 LOSS -9.5
Theijn, D. (Dave) (1843) Wednesday 19 April 2023 LOSS -20.2
Cheung, Y.W. (Jan) (2059) Monday 6 March 2023 LOSS -13.5
Mulekom van, H. (Hans) (1891) Saturday 11 February 2023 WIN +6.3
Baak, K.L. (Karl) (1773) Monday 6 February 2023 WIN +3.5
Gieben, S. (Stijn) (2188) Tuesday 20 December 2022 LOSS -9.5
Rooij de, R. (Raymond) (2169) Saturday 17 December 2022 LOSS -10.1
Bolle, L. (Leo) Monday 28 November 2022 WIN