KNSB FIDE
KS

Klaas Siewertsen

Rated since August 2025

1538 Classical

The good & the bad

Best wins
BAJNATH, AMRESH 1494
Amsterdam Chess Festival 2026 - Group C · 2026-07-11
GOOIJERS, RICHARD 1464
Amsterdam Chess Festival 2026 - Group C · 2026-07-11
Worst losses
TULENBAYEVA, ALIIYA 1538
Amsterdam Chess Festival 2026 - Group C · 2026-07-11
KAPTEIN, PETER 1646
Amsterdam Chess Festival 2026 - Group C · 2026-07-11
PEPER, JEROEN 1722
Amsterdam Chess Festival 2026 - Group C · 2026-07-11
VAN GAALEN, JAKOB 1740
Amsterdam Chess Festival 2026 - Group C · 2026-07-11
PELT, HANS 1763
Amsterdam Chess Festival 2026 - Group C · 2026-07-11

FIDE Tournaments

Amsterdam Chess Festival 2026 - Group C 2026-07-11 +2–5=0 -44.4
UniClass Science Park Amsterdam Schaaktoernooi Groep C Saturday 5 July 2025 +2–3=3 -7.1

Rating History

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Peak Ratings

Classical 1582

Games

Wins 2
Losses 5
Draws 0
Win Rate 29%

Performance by Color

Color Wins Draws Losses Win Rate
White 0 0 3 0%
Black 2 0 2 50%

All-time Games (from rating history)

Classical 16

Recent Matches

Van Gaalen, Jakob (1740) 2026-07-11 LOSS -11.6
Pelt, Hans (1763) 2026-07-11 LOSS -10.4
Tulenbayeva, Aliiya (1538) 2026-07-11 LOSS -22.4
Kaptein, Peter (1646) 2026-07-11 LOSS -16.4
Bajnath, Amresh (1494) 2026-07-11 WIN +15.2
Peper, Jeroen (1722) 2026-07-11 LOSS -12.4
Gooijers, Richard (1464) 2026-07-11 WIN +13.6