Format
KJ
Kosata, Jiri
🇨🇿FIDE 23717599· Male· Czech Republic· Born in 1983
Follow Jiri KosataTrack his monthly FIDE ratings, games, tournaments and more.
Jiri Kosata, a 43-year-old Czech player, is rated 1591 — just 10 short of his peak of 1601 (Mar 2024, age 41). He plays occasionally (7 games in the last 12 months) and took a 23-month break between Sep 2021 and Sep 2023. Recent appearance: OLOMOUC CHESS SUMMER 2025 - C.
Current rating
1591
Standard
Rpd—·Blz—
All-time high
1601
−10 pts below
Mar 2024 · age 41
Mar 2024 · age 41
Activity
7
games / yr avg. · ≈1/mo
7 past 12 mo · ≈1/mo
classical only
Occasional
classical only
Occasional
Signature stat
#149,847
#149,847 · players worldwide · of 216,808
Career timeline
9 entries2024
Best 12-month gain (+258 Elo)
1343 → 1601
Mar 2024
Crossed 1600
at age 41
Mar 2024
Crossed 1500
at age 41
Mar 2024
Re-crossed 1400
at age 41
Mar 2024
All-time peak 1601
at age 41 · −10 from today
Mar 2024
2021
K-factor lowered to 20
at age 38
Sep 2021
Standard rating history
Last 12 months — activity & highlights
Evolution
+2
1589 → 1591
Tournaments
1
9 games
Score
4/ 944.4%
4W0D5L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
1 event| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Open Swiss | Aug 2025 | 4/7 | #50 | 1714 | +1.8 |
Rankings
/
Czech Republic
#4,883
out of 6,368 players
Europe
#99,786
in continent
World
#149,832
out of 400,000+
National ranking
Europe & World
Europe
World
Czech Republic
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