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 1886. He has slipped back 38 Elo over the past 12 months. 25 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
1886
Standard
Rpd—·Blz—
All-time high
1924
−38 pts below
May 2025 · age 50
May 2025 · age 50
Activity
32
games / yr avg. · ≈3/mo
25 past 12 mo · ≈2/mo
classical only
Active
classical only
Active
Signature stat
#51,614
#51,614 · players worldwide · of 216,808
Career timeline
11 entries2025
100 career games
at age 50
Sep 2025
All-time peak 1924
at age 50 · −38 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
Last 12 months — activity & highlights
Top opponent
Evolution
-37
1923 → 1886
Tournaments
6
26 games
Score
13.5/ 2651.9%
10W7D9L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
6 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
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 |
Worst Elo result: Deutsche Schach-Amateurmeisterschaft 2024-2025 Finale D (-37.0 Elo, finished #35).
Rankings
/
Germany
#5,627
out of 15,291 players
Europe
#37,960
in continent
World
#51,614
out of 400,000+
National ranking
Europe & World
Europe
World
Germany
| 1 | 🇩🇪Follow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more. | 2,759 |
| 2 | 🇩🇪Follow Matthias BluebaumTrack their monthly FIDE ratings, games, tournaments and more. | 2,694 |
| 3 | 🇩🇪Follow Alexander DonchenkoTrack their monthly FIDE ratings, games, tournaments and more. | 2,645 |
| 3 | 🇩🇪Follow Frederik SvaneTrack their monthly FIDE ratings, games, tournaments and more. | 2,645 |
| 5 | 🇩🇪Follow Dmitrij KollarsTrack their monthly FIDE ratings, games, tournaments and more. | 2,635 |
| 6 | 🇩🇪Follow Rasmus SvaneTrack their monthly FIDE ratings, games, tournaments and more. | 2,620 |
| 7 | 🇩🇪Follow Luis EngelTrack their monthly FIDE ratings, games, tournaments and more. | 2,593 |
| 8 | 🇩🇪Follow Fabian DoettlingTrack their monthly FIDE ratings, games, tournaments and more. | 2,592 |
| 9 | 🇩🇪Follow Dennis WagnerTrack their monthly FIDE ratings, games, tournaments and more. | 2,591 |
| 10 | 🇩🇪Follow Arik BraunTrack their monthly FIDE ratings, games, tournaments and more. | 2,587 |
| ... | ||
| 5627 | 1,886 | |
Europe
| 1 | 🇳🇴Follow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more. | 2,840 |
| 2 | 🇳🇱Follow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more. | 2,767 |
| 3 | 🇩🇪Follow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more. | 2,759 |
| 3 | 🇫🇷Follow Alireza FirouzjaTrack their monthly FIDE ratings, games, tournaments and more. | 2,759 |
| 5 | 🇵🇱Follow Jan-Krzysztof DudaTrack their monthly FIDE ratings, games, tournaments and more. | 2,739 |
| 6 | 🇳🇱Follow Jorden Van ForeestTrack their monthly FIDE ratings, games, tournaments and more. | 2,735 |
| 7 | 🇭🇺Follow Richard RapportTrack their monthly FIDE ratings, games, tournaments and more. | 2,729 |
| 8 | 🇫🇷Follow Maxime Vachier-LagraveTrack their monthly FIDE ratings, games, tournaments and more. | 2,717 |
| 8 | 🇦🇿Follow Shakhriyar MamedyarovTrack their monthly FIDE ratings, games, tournaments and more. | 2,717 |
| 10 | 🇹🇷Follow Yagiz Kaan ErdogmusTrack their monthly FIDE ratings, games, tournaments and more. | 2,708 |
| ... | ||
| 37960 | 1,886 | |
World
| 1 | 🇳🇴Follow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more. | 2,840 |
| 2 | 🇺🇸Follow Hikaru NakamuraTrack their monthly FIDE ratings, games, tournaments and more. | 2,792 |
| 3 | 🇺🇸Follow Fabiano CaruanaTrack their monthly FIDE ratings, games, tournaments and more. | 2,788 |
| 4 | 🇺🇿Follow Nodirbek AbdusattorovTrack their monthly FIDE ratings, games, tournaments and more. | 2,780 |
| 5 | 🇺🇿Follow Javokhir SindarovTrack their monthly FIDE ratings, games, tournaments and more. | 2,776 |
| 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 |
| 10 | 🇨🇳Follow Yi WeiTrack their monthly FIDE ratings, games, tournaments and more. | 2,753 |
| ... | ||
| 51614 | 1,886 | |