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De Koster, Jaap

🇳🇱

FIDEFIDE 1093029· Male· Netherlands· Born in 2011

Follow Jaap De KosterTrack his monthly FIDE ratings, games, tournaments and more.

Jaap De Koster, a 15-year-old Dutch player, is rated 1764 — just 20 short of his peak of 1784 (Feb 2026, age 15). He plays occasionally (6 games in the last 12 months). Recent standard appearances include Dutch Team Competition - klasse 5 Round 7, Tata Steel Chess 2026 - Weekendvierkampen, and Dutch Team Competition - klasse 5 Round 4.

At junior level, he reached #41 and #35 nationally in U16 and U14.

Current rating

1764

Standard

Rpd—·Blz—

All-time high

1784

−20 pts below
Feb 2026 · age 15

Activity

9

games / yr avg. · ≈1/mo

6 past 12 mo · ≈1/mo
classical only
Occasional

Signature stat

#87,727

#87,727 · players worldwide · of 216,808

Career timeline

8 entries
2026
41st Dutch U16 player
at age 15 · rated 1784
Feb 2026
All-time peak 1784
at age 15 · −20 from today
Feb 2026
Best 12-month gain (+97 Elo)
1683 → 1780
Jan 2026
2025
35th Dutch U14 player
at age 14 · rated 1723
Apr 2025
2024
Crossed 1600
at age 13
Nov 2024
Crossed 1500
at age 13
Nov 2024

Standard rating history

Last 12 months — activity & highlights

Top opponent
vs Werner Hubner 1,913
Dutch Team Competition - klasse 5 Round 3 · Nov 2025 · +8.6 Elo
Evolution
+41
1723 → 1764
Tournaments
5
8 games
Score
4.5/ 856.3%
4W3D1L

Last 12 months — tournaments

5 events
EventDateScoreRankPerfΔ Elo
Dutch Team Competition - klasse 5 Round 7
Team
Mar 20260/1#527983-20.0
Tata Steel Chess 2026 - Weekendvierkampen
Round-Robin
Jan 20262/2#3682617+4.0
Dutch Team Competition - klasse 5 Round 4
Team
Dec 20251/1#1542667+26.0
Dutch Team Competition - klasse 5 Round 3
Team
Nov 20250.5/1#2421913+8.8
Dutch Team Competition - klasse 5 Round 1
Team
Oct 20251/1#512555+21.6
Worst Elo result: Dutch Team Competition - klasse 5 Round 7 (-20.0 Elo, finished #527).

Rankings

/
Netherlands
#3,473
out of 4,901 players
Europe
#62,920
in continent
World
#87,726
out of 400,000+

National ranking

Europe & World

Europe
World
Netherlands
1
🇳🇱Giri, AnishFollow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more.
2,767
2
🇳🇱Van Foreest, JordenFollow Jorden Van ForeestTrack their monthly FIDE ratings, games, tournaments and more.
2,735
3
🇳🇱Van Wely, LoekFollow Loek Van WelyTrack their monthly FIDE ratings, games, tournaments and more.
2,625
4
🇳🇱L'Ami, ErwinFollow Erwin L'AmiTrack their monthly FIDE ratings, games, tournaments and more.
2,592
5
🇳🇱Schoppen, CasperFollow Casper SchoppenTrack their monthly FIDE ratings, games, tournaments and more.
2,589
6
🇳🇱Reinderman, DimitriFollow Dimitri ReindermanTrack their monthly FIDE ratings, games, tournaments and more.
2,574
7
🇳🇱Sokolov, IvanFollow Ivan SokolovTrack their monthly FIDE ratings, games, tournaments and more.
2,567
8
🇳🇱Smeets, JanFollow Jan SmeetsTrack their monthly FIDE ratings, games, tournaments and more.
2,564
9
🇳🇱Bok, BenjaminFollow Benjamin BokTrack their monthly FIDE ratings, games, tournaments and more.
2,560
10
🇳🇱Van den Doel, ErikFollow Erik Van den DoelTrack their monthly FIDE ratings, games, tournaments and more.
2,549
...
3473🇳🇱De Koster, Jaap1,764
Europe
1
🇳🇴Carlsen, MagnusFollow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more.
2,840
2
🇳🇱Giri, AnishFollow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more.
2,767
3
🇩🇪Keymer, VincentFollow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more.
2,759
3
🇫🇷Firouzja, AlirezaFollow Alireza FirouzjaTrack their monthly FIDE ratings, games, tournaments and more.
2,759
5
🇵🇱Duda, Jan-KrzysztofFollow Jan-Krzysztof DudaTrack their monthly FIDE ratings, games, tournaments and more.
2,739
6
🇳🇱Van Foreest, JordenFollow Jorden Van ForeestTrack their monthly FIDE ratings, games, tournaments and more.
2,735
7
🇭🇺Rapport, RichardFollow Richard RapportTrack their monthly FIDE ratings, games, tournaments and more.
2,729
8
🇫🇷Vachier-Lagrave, MaximeFollow Maxime Vachier-LagraveTrack their monthly FIDE ratings, games, tournaments and more.
2,717
8
🇦🇿Mamedyarov, ShakhriyarFollow Shakhriyar MamedyarovTrack their monthly FIDE ratings, games, tournaments and more.
2,717
10
🇹🇷Erdogmus, Yagiz KaanFollow Yagiz Kaan ErdogmusTrack their monthly FIDE ratings, games, tournaments and more.
2,708
...
62920🇳🇱De Koster, Jaap1,764
World
1
🇳🇴Carlsen, MagnusFollow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more.
2,840
2
🇺🇸Nakamura, HikaruFollow Hikaru NakamuraTrack their monthly FIDE ratings, games, tournaments and more.
2,792
3
🇺🇸Caruana, FabianoFollow Fabiano CaruanaTrack their monthly FIDE ratings, games, tournaments and more.
2,788
4
🇺🇿Abdusattorov, NodirbekFollow Nodirbek AbdusattorovTrack their monthly FIDE ratings, games, tournaments and more.
2,780
5
🇺🇿Sindarov, JavokhirFollow Javokhir SindarovTrack their monthly FIDE ratings, games, tournaments and more.
2,776
6
🇳🇱Giri, AnishFollow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more.
2,767
7
🇩🇪Keymer, VincentFollow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more.
2,759
7
🇫🇷Firouzja, AlirezaFollow Alireza FirouzjaTrack their monthly FIDE ratings, games, tournaments and more.
2,759
9
🇺🇸So, WesleyFollow Wesley SoTrack their monthly FIDE ratings, games, tournaments and more.
2,754
10
🇨🇳Wei, YiFollow Yi WeiTrack their monthly FIDE ratings, games, tournaments and more.
2,753
...
87726🇳🇱De Koster, Jaap1,764