Format
KJ
Kosiarz, Jan
🇵🇱FIDE 91152518· Male· Poland· Born in 2013
Follow Jan KosiarzTrack his monthly FIDE ratings, games, tournaments and more.
Jan Kosiarz, a 13-year-old Polish player, is rated 1445 — his current career high. He plays occasionally (9 games in the last 12 months). Recent appearances: Eliminacje Strefowe do OOM 2026 - C13 (LD-SK) and Grand Hotel Kielce Chess Open 2025 - Turniej C (U14). Also played 1 rapid (including X Ogolnopolski Turniej Szachowy im. Jozefa Mazgaja 14 FIDE) and 3 blitz events (including III SWIETOKRZYSKIE WAKACJE Z SZACHAMI Suchedniow 2025 Blitz - grupa OPEN) recently.
Current rating
1445
Standard
Rpd1566·Blz1496
All-time high
1445
at best
Dec 2025 · age 12
Dec 2025 · age 12
Activity
9
games / yr avg. · ≈1/mo
9 past 12 mo · ≈1/mo
classical only
Occasional
classical only
Occasional
Signature stat
#204,431
#204,431 · players worldwide · of 216,808
Career timeline
4 entries2025
All-time peak 1445
at age 12
Dec 2025
Crossed 1400
at age 12
Nov 2025
Crossed 1200
at age 12
Nov 2025
First FIDE rating
1444 · at age 12
Nov 2025
Standard rating history
Last 12 months — activity & highlights
Top opponent
Evolution
—
Tournaments
2
14 games
Score
5.5/ 1439.3%
3W5D6L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
2 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Swiss | Oct 2025 | 2.5/9 | #12 | 1363 | 0.0 |
Swiss | Jul 2025 | 3/3 | #13 | 1420 | 0.0 |
Rankings
/
Poland
#5,867
out of 10,756 players
Europe
#124,264
in continent
World
#204,224
out of 400,000+
National ranking
Europe & World
Europe
World
Poland
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| ... | ||
| 5867 | 1,445 | |
Europe
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| ... | ||
| 124264 | 1,445 | |
World
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| 6 | 🇳🇱Follow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more. | 2,767 |
| 7 | 🇩🇪Follow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more. | 2,759 |
| 7 | 🇫🇷Follow Alireza FirouzjaTrack their monthly FIDE ratings, games, tournaments and more. | 2,759 |
| 9 | 🇺🇸Follow Wesley SoTrack their monthly FIDE ratings, games, tournaments and more. | 2,754 |
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| ... | ||
| 204224 | 1,445 | |