KNSB FIDE
FG

Folkert-Jan Geertsma

Rated since January 2023

1950 Classic
1950 Rapid
1950 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
BATYREV, E.D. (ERDNI) 1840
12594 KNSB competitie 2025-2026 Klasse 5 ronde 4 · Saturday 13 December 2025
BERG VAN DEN, E. (ERIK) 1829
11252 KNSB competitie 2024-2025 Klasse 4 ronde 9 en uitgestelde wedstrijd … · Saturday 10 May 2025
ROMANO TUNCEL, E. (EREZ) 1815
12653 LeiSB regionale competitie 25-26 Hoofdklasse december · Friday 19 December 2025
HERRERO, R. (ROBERT) 1785
12410 KNSB competitie 2025-2026 Klasse 5 Ronde 3 · Saturday 22 November 2025
Worst losses
BOSMAN, J. (JOHAN) 1902
13248 KNSB competitie 2025-2026 Klasse 5 ronde 7 · Saturday 7 March 2026
No FIDE-rated tournaments found.
LeiSB regionale competitie 25-26 Hoofdklasse december Wednesday 1 October 2025 +1–0=0 +7.9
KNSB competitie 2025-2026 Klasse 5 ronde 5 Saturday 20 September 2025 +0–0=1 -5.0
KNSB competitie 2025-2026 Klasse 5 ronde 7 Saturday 20 September 2025 +0–1=0 -14.9
KNSB competitie 2025-2026 Klasse 5 ronde 4 Saturday 20 September 2025 +1–0=0 +8.7
KNSB competitie 2025-2026 Klasse 5 Ronde 3 Saturday 20 September 2025 +1–0=0 +7.0
KNSB competitie 2025-2026 Klasse 5 ronde 2 Saturday 20 September 2025 +0–0=1 -4.8
KNSB competitie 2024-2025 Klasse 4 ronde 9 en uitgestelde wedstrijd … Saturday 21 September 2024 +1–0=0 +8.7

Rating History

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Peak Ratings

Classic 1970 Jan. 1, 2026
Rapid 1970 March 1, 2026
Blitz 1970 March 1, 2026

Games

Wins 4
Losses 1
Draws 2
Win Rate 57%

Performance by Color

Color Wins Draws Losses Win Rate
White 2 0 1 67%
Black 2 2 0 50%

Recent Matches

Varela, C.A. (César) (1821) Saturday 28 March 2026 DRAW -5.0
Bosman, J. (Johan) (1902) Saturday 7 March 2026 LOSS -14.9
Romano Tuncel, E. (Erez) (1815) Friday 19 December 2025 WIN +7.9
Batyrev, E.D. (Erdni) (1840) Saturday 13 December 2025 WIN +8.7
Herrero, R. (Robert) (1785) Saturday 22 November 2025 WIN +7.0
Ersöz, B.H. (Baris) (1609) Saturday 1 November 2025 DRAW -4.8
Berg van den, E. (Erik) (1829) Saturday 10 May 2025 WIN +8.7