Format
KI
Kostowski, Ireneus, Dr.
🇩🇪FIDE 4689615· Male· Germany· Born in 1975
Follow Ireneus KostowskiTrack his monthly FIDE ratings, games, tournaments and more.
Ireneus, Dr. Kostowski, a 51-year-old German player, is rated 1875. He has slipped back 48 Elo over the past 12 months. 30 rated games in the past year (≈5/year long-term). Recent standard appearances include 33. DSK-Open 2026 Maerz 2026, 8. Dinslakener offene Stadtmeisterschaft im Schach, and 61st International Akiba Rubinstein Chess Festival - OPEN B. He had 3 career breaks: 47 months (2004–2008), 21 months (2008–2009) and 148 months (2010–2023). His peak of 1924 was reached at age 50 (May 2025).
Current rating
1875
Standard
Rpd—·Blz—
All-time high
1924
−49 pts below
May 2025 · age 50
May 2025 · age 50
Activity
34
games / yr avg. · ≈3/mo
30 past 12 mo · ≈3/mo
classical only
Active
classical only
Active
Signature stat
#54,478
#54,478 · players worldwide · of 218,279
Career timeline
11 entries2025
100 career games
at age 50
Sep 2025
All-time peak 1924
at age 50 · −49 from today
May 2025
Best 12-month gain (+92 Elo)
1769 → 1861
Jan 2025
2024
Re-crossed 1800
at age 49
Mar 2024
2023
K-factor lowered to 20
at age 48
Jul 2023
2010
Inactive for 148 months
paused at 1863 → returned at 1885
Nov 2010
Standard rating history
Peak
FIDE title
Threshold
First rated
Inactive period
COVID-19
FIDE recal.
Activity & highlights
Top opponent
Evolution
-49
1924 → 1875
Tournaments
7
31 games
Score
16/ 3151.6%
12W8D11L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
7 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Open Swiss | May 2026 | 2.5/5 | #52 | 1804 | -11.4 |
Open Swiss | Mar 2026 | 1/1 | #22 | 2477 | +4.6 |
Open Swiss | Feb 2026 | 0/1 | #55 | 1249 | -5.8 |
Open Swiss | Jan 2026 | 2/2 | #32 | 2584 | -3.8 |
Open Swiss | Oct 2025 | 4.5/7 | #9 | 1980 | +25.8 |
Open Swiss | Aug 2025 | 4.5/9 | #49 | 1796 | -22.6 |
Swiss | Jul 2025 | 1.5/5 | #35 | 1651 | -37.0 |
Worst Elo result: Deutsche Schach-Amateurmeisterschaft 2024-2025 Finale D (-37.0 Elo, finished #35).
Rankings
/
Germany
#5,919
out of 15,549 players
Europe
#39,996
in continent
World
#54,477
out of 400,000+
National ranking
Europe & World
Europe
World
Germany
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Europe
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World
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