Format
DK
De Koster, Willem
🇳🇱FIDE 1098934· Male· Netherlands· Born in 1984
Follow Willem De KosterTrack his monthly FIDE ratings, games, tournaments and more.
Willem De Koster, a 42-year-old Dutch player, is rated 1760 — his current career high. He plays occasionally (5 games in the last 12 months). Recent appearances: Tata Steel Chess 2026 - Weekendvierkampen and 2026 Chess.com Botwinnik Open - Vierkampen.
Current rating
1760
Standard
Rpd—·Blz1786
All-time high
1760
at best
May 2025 · age 41
May 2025 · age 41
Activity
4
games / yr avg.
5 past 12 mo
classical only
Occasional
classical only
Occasional
Signature stat
#89,053
#89,053 · players worldwide · of 216,808
Career timeline
5 entries2025
All-time peak 1760
at age 41
May 2025
Crossed 1600
at age 41
Feb 2025
Crossed 1500
at age 41
Feb 2025
Crossed 1400
at age 41
Feb 2025
First FIDE rating
1758 · at age 41
Feb 2025
Standard rating history
Last 12 months — activity & highlights
Top opponent
Evolution
0
1760 → 1760
Tournaments
2
6 games
Score
2/ 633.3%
2W2D2L
Top 3 wins
Top 2 losses
Last 12 months — tournaments
2 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Round-Robin | Jan 2026 | 1/3 | #241 | 1703 | -10.0 |
Round-Robin | Jan 2026 | 1/2 | #16 | 1846 | +9.6 |
Rankings
/
Netherlands
#3,505
out of 4,901 players
Europe
#63,819
in continent
World
#89,052
out of 400,000+
National ranking
Europe & World
Europe
World
Netherlands
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World
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