Bar Blitz KNSB FIDE
JB

Jan Bosma

Rated since January 2023

2034 Classic
1985 Blitz
Jan's accounts
FIDE KNSB
Followers
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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
Veenstra, F.L.J. (Frits) 1817
13483 Amsterdam Chess Festival Blitz 2026 + NK Studenten Blitz Groep A · Friday 10 July 2026
Elisen, P. (Peter) 1789
13483 Amsterdam Chess Festival Blitz 2026 + NK Studenten Blitz Groep A · Friday 10 July 2026
Heeres, F.C. (Felix) 1782
13483 Amsterdam Chess Festival Blitz 2026 + NK Studenten Blitz Groep A · Friday 10 July 2026
Worst losses
Shah, Kian 1811
13483 Amsterdam Chess Festival Blitz 2026 + NK Studenten Blitz Groep A · Friday 10 July 2026
Theijn, D. (Dave) 1843
7000 HSB competitie 2022-2023 HSB competitie 2022-2023 ronde 6 en 7 · Wednesday 19 April 2023
Adavatkar, R. (Rugved) 1844
13483 Amsterdam Chess Festival Blitz 2026 + NK Studenten Blitz Groep A · Friday 10 July 2026
Dreu de, D. (Dies) 1888
13483 Amsterdam Chess Festival Blitz 2026 + NK Studenten Blitz Groep A · Friday 10 July 2026
Hecker, M.J.A. (Mark) 1939
13483 Amsterdam Chess Festival Blitz 2026 + NK Studenten Blitz Groep A · Friday 10 July 2026
Amsterdam Chess Festival Blitz 2026 + NK Studenten Blitz Groep A Friday 10 July 2026 +6–5=2 -48.8
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

Team Competition

Current teams
DSC 1
Hoofdklasse · 2022-2023 · 5 games
DSC Delft 1
Klasse 1B · 2022-2023 · 4 games
Past teams
DSC 1
Hoofdklasse · 2021-2022

Rating History

Loading KNSB rating history...

Peak Ratings

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

Games

Wins 10
Losses 13
Draws 3
Win Rate 38%

Performance by Color

ColorWinsDrawsLossesWin Rate
White 7 1 5 54%
Black 3 2 8 23%

Recent KNSB Matches

Heeres, F.C. (Felix) (1782) Friday 10 July 2026 WIN +4.7
Hecker, M.J.A. (Mark) (1939) Friday 10 July 2026 LOSS -15.8
Veenstra, F.L.J. (Frits) (1817) Friday 10 July 2026 WIN +5.6
Adavatkar, R. (Rugved) (1844) Friday 10 July 2026 LOSS -18.7
Elisen, P. (Peter) (1789) Friday 10 July 2026 WIN +4.9
Dreu de, D. (Dies) (1888) Friday 10 July 2026 LOSS -17.4
Shah, Kian (1811) Friday 10 July 2026 LOSS -19.6
Parwani, Neel (1830) Friday 10 July 2026 DRAW -3.3
Daiwik Hemant Mehta (1521) Friday 10 July 2026 WIN +0.9
IM Zwirs, N.J.J. (Nico) (2433) Friday 10 July 2026 LOSS -2.0
FM Slagboom, L. (Leandro) (2324) Friday 10 July 2026 DRAW +8.6
Polm, J. (Jari) (1541) Friday 10 July 2026 WIN +1.1
Thakkar, V. (Viaan) (1636) Friday 10 July 2026 WIN +2.1
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