KNSB FIDE
PB

Pieter Bosma

Rated since January 2023

1694 Classic
1616 Rapid
1711 Blitz

RIVALRY

Nemesis
Kruit, E.A. (Erik)
Games: 3 · Win rate: 0%

The good & the bad

Best wins
FOLBERT, M. (MARK) 1862
13297 FK Rapid voor teams - · Saturday 21 March 2026
STRUIKSMA, A. (ALLARD) 1806
13471 Schaak Combinatie Leeuwarden interne competitie 03-02-2026 t/m 24-03… · Tuesday 17 February 2026
BOTTER, J. (JOACHIM) 1702
13146 K.S.C. Philidor 1847 interne competitie 26-01-2026 t/m 09-02-2026 (0… · Monday 9 February 2026
PLOEGER, P. (PIETER) 1702
12660 K.S.C. Philidor 1847 interne competitie 27-10-2025 t/m 22-12-2025 (0… · Monday 27 October 2025
BRATANIN, A. (ANTON) 1669
13146 K.S.C. Philidor 1847 interne competitie 26-01-2026 t/m 09-02-2026 (0… · Monday 2 February 2026
Worst losses
GHOLAMI, POUYAN 1559
12701 Chessfestival Groningen Compact Groep C · Friday 26 December 2025
DUINDAM, H. (HEDDE) 1619
12701 Chessfestival Groningen Compact Groep C · Monday 29 December 2025
APAZA DIAZ, SANTIAGO MAURICIO 1654
12701 Chessfestival Groningen Compact Groep C · Sunday 28 December 2025
SINIA, S.A. (SJOUKE ATZE) 1693
12018 FSB-competitie 2025-2026 ronde 4 2e klasse · Tuesday 16 December 2025
BUURMAN, M.J. (MAARTEN JAN) 1709
12448 Schaak Combinatie Leeuwarden Intern 1-10 · Tuesday 21 October 2025
Chessfestival Groningen Compact Groep C Friday 26 December 2025 +1–3=1 -38.2
FK Rapid voor teams - Saturday 21 March 2026 +3–4=0 +29.1
K.S.C. Philidor 1847 interne competitie 23-02-2026 t/m 13-04-2026 (0… Saturday 21 February 2026 +0–7=0 -21.5
Schaak Combinatie Leeuwarden Intern 1-10 Tuesday 16 September 2025 +4–3=0 +14.8
K.S.C. Philidor 1847 interne competitie 26-01-2026 t/m 09-02-2026 (0… Monday 8 September 2025 +2–1=0 +21.0
K.S.C. Philidor 1847 interne competitie 12-01-2026 t/m 19-01-2026 (0… Monday 8 September 2025 +1–0=0 +10.6
K.S.C. Philidor 1847 interne competitie 27-10-2025 t/m 22-12-2025 (0… Monday 8 September 2025 +1–3=2 +11.2
FSB-competitie 2025-2026 ronde 7 3e klasse Monday 1 September 2025 +1–0=0 +4.8
FSB-competitie 2025-2026 ronde 6 3e klasse Monday 1 September 2025 +1–0=0 +6.8
Schaak Combinatie Leeuwarden interne competitie 03-02-2026 t/m 24-03… Monday 1 September 2025 +1–3=0 -14.0
FSB-competitie 2025-2026 ronde 4 3e klasse Monday 1 September 2025 +1–0=0 +8.2
FSB-competitie 2025-2026 ronde 4 2e klasse Monday 1 September 2025 +0–1=0 -13.0
Schaak Combinatie Leeuwarden interne competitie 02-12-2025 t/m 20-01… Monday 1 September 2025 +1–0=1 +13.6
FSB-competitie 2025-2026 ronde 3 3e klasse Monday 1 September 2025 +1–0=0 +4.5
FSB-competitie 2025-2026 ronde 3 2e klasse Monday 1 September 2025 +0–1=0 -7.1
FSB-competitie 2025-2026 Beker ronde 1 Monday 1 September 2025 +0–1=0 -8.6

Rating History

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Peak Ratings

Classic 1718 March 1, 2026
Rapid 1616 April 1, 2026
Blitz 1718 March 1, 2026

Games

Wins 18
Losses 27
Draws 4
Win Rate 37%

Performance by Color

Color Wins Draws Losses Win Rate
White 10 2 12 42%
Black 8 2 15 32%

Recent Matches

Bolhuis van, F. (Frank) (1460) Thursday 16 April 2026 WIN +4.8
Schriemer, O. (Oene) (2100) Monday 13 April 2026 LOSS -2.2
Hania, J. (Jan) (2183) Monday 30 March 2026 LOSS -1.3
Steenhuis, S. (Sebe) (1546) Wednesday 25 March 2026 WIN +6.8
Hoop de, S. (Sipke) (1983) Tuesday 24 March 2026 LOSS -4.4
Wolfslag, R. (René) (1829) Tuesday 24 March 2026 LOSS -8.7
Veen van der, R. (Ronald) (1977) Saturday 21 March 2026 LOSS -2.2
Aartsma, J. (Jan) (1631) Saturday 21 March 2026 WIN +14.0
Folbert, M. (Mark) (1862) Saturday 21 March 2026 WIN +20.8
Dekker, J. (Jos) (1874) Saturday 21 March 2026 LOSS -3.9
Kooi van der, A. (Aat) (1843) Saturday 21 March 2026 LOSS -4.6
Vries de, B. (Bart) (1464) Saturday 21 March 2026 WIN +8.3
Wit de, J. (Jim) (1905) Saturday 21 March 2026 LOSS -3.3
Popma, T. (Tjeerd) (1725) Tuesday 17 March 2026 LOSS -12.3
IM Jong de, M. (Migchiel) (2289) Monday 16 March 2026 LOSS -0.6
Boer de, R. (Rein) (2055) Monday 9 March 2026 LOSS -3.0
Kruit, E.A. (Erik) (1900) Tuesday 24 February 2026 LOSS -6.0
Visscher, H. (Harmen) (1976) Monday 23 February 2026 LOSS -4.1
Struiksma, A. (Allard) (1806) Tuesday 17 February 2026 WIN +16.2
Brouwer, P.D. (Peter) (1793) Tuesday 10 February 2026 LOSS -9.2