KNSB FIDE
PB

Pieter Bosma

Rated since January 2023

1713 Classic
1616 Rapid
1740 Blitz

RIVALRY

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

The good & the bad

Best wins
HANIA, J. (JAN) 2178
14202 K.S.C. Philidor 1847 interne competitie 20-04-2026 t/m 20-04-2026 (0… · Monday 20 April 2026
FOLBERT, M. (MARK) 1862
13297 FK Rapid voor teams - · Saturday 21 March 2026
NIJEMCEVIC, I. (IRFAN) 1808
13988 Schaak Combinatie Leeuwarden interne competitie 31-03-2026 t/m 09-06… · Tuesday 26 May 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
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
DOEVENDANS, A. (ARJEN) 1708
13988 Schaak Combinatie Leeuwarden interne competitie 31-03-2026 t/m 09-06… · Tuesday 12 May 2026
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
K.S.C. Philidor 1847 interne competitie 20-04-2026 t/m 20-04-2026 (0… Sunday 4 January 2026 +4–5=0 +27.1
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
Schaak Combinatie Leeuwarden interne competitie 31-03-2026 t/m 09-06… Monday 1 September 2025 +2–1=3 +19.3
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

Team Competition

Current teams
De Rode Loper 2
2e klasse A · 2025-2026 · 3 games
De Rode Loper 2
Beker · 2025-2026 · 1 game
De Rode Loper 3
3e klasse A · 2025-2026 · 5 games
Past teams
De Rode Loper 2
2e klasse A · 2024-2025
Schaak Combinatie Leeuwarden 1
Klasse 5A · 2023-2024

Rating History

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Peak Ratings

Classic 1718 March 1, 2026
Rapid 1616 April 1, 2026
Blitz 1740 Sept. 1, 2026

Games

Wins 24
Losses 33
Draws 7
Win Rate 38%

Performance by Color

Color Wins Draws Losses Win Rate
White 13 4 16 39%
Black 11 3 17 35%

Recent Matches

Nijemcevic, I. (Irfan) (1808) Tuesday 26 May 2026 WIN +16.4
Fraanje, W. (Wiebe) (1700) Tuesday 19 May 2026 WIN +12.7
Doevendans, A. (Arjen) (1708) Tuesday 12 May 2026 LOSS -12.0
Schriemer, O. (Oene) (2100) Monday 20 April 2026 LOSS -2.2
Hania, J. (Jan) (2178) Monday 20 April 2026 WIN +23.7
IM Jong de, M. (Migchiel) (2319) Monday 20 April 2026 LOSS -0.4
Sparenberg, E. (Erik) (2114) Monday 20 April 2026 LOSS -2.0
Stegeman, D. (Derk) (1591) Monday 20 April 2026 WIN +8.4
Dijkhoff, R. (Richard) (1550) Monday 20 April 2026 WIN +7.2
Siblesz, J.T. (Tjeerd) (1997) Monday 20 April 2026 LOSS -4.0
Alain de Haan (1108) Monday 20 April 2026 WIN +0.4
Visscher, H. (Harmen) (1990) Monday 20 April 2026 LOSS -4.1
Bolhuis van, F. (Frank) (1460) Thursday 16 April 2026 WIN +4.8
Rozenga, E. (Erwin) (1672) Tuesday 14 April 2026 DRAW -1.4
Schriemer, O. (Oene) (2100) Monday 13 April 2026 LOSS -2.2
Griendt van de, W.B. (Wouter) (1928) Tuesday 7 April 2026 DRAW +6.9
Vink, G. (Guido) (1621) Tuesday 31 March 2026 DRAW -3.3
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