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Player profile

Kostowski, Ireneus, Dr.

Standard: 1825 Rapid: 0 Blitz: 0 (last updated 2026-10-02)
FIDE ID: 4689615 (view FIDE profile)
Federation: GER Sex: M Birth Year: 1975 Age: 51
Title: — Women's title: — Other title: — FOA title: —
Games: 24 Wins: 10 (42%) Draws: 4 (17%) Losses: 10 (42%)
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Dossier

23 of 24 games analyzed.

Accuracy: 87.4%
Opened d4: 8/8
Castled kingside: 9Same-side castling: 6Did not castle: 3Castled queenside: 2Opposite-side castling: 2
Played on the kingside: 5Played on the queenside: 3Fianchettoed kingside: 3Played in the center: 3Fianchettoed queenside: 2
Backward pawn: 11Initiated exchanges: 10Active pieces: 9Space advantage: 8Kept the bishop pair: 8Missed tactics: 7Sacrificed material: 5Isolated pawn: 4Avoided exchanges: 1
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Openings

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As White 9 games 4W 1D 4L
Queen's Pawn Game 5 games 3W 1D 1L
London System 3 games 2W 1D 0L
(unspecified) 3 games 2W 1D 0L
(unspecified) 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Stonewall Attack 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Indian Defense 2 games 1W 0D 1L
London System 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified) 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Rapport-Jobava System 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Pirc Defense 1 game 0W 0D 1L
Classical Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
As Black 6 games 2W 2D 2L
Benoni Defense 2 games 1W 0D 1L
Modern Variation 2 games 1W 0D 1L
(unspecified) 2 games 1W 0D 1L
Sicilian Defense 1 game 0W 1D 0L
Alapin Variation 1 game 0W 1D 0L
Barmen Defense 1 game 0W 1D 0L
Benko Gambit 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Queen's Gambit Declined 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Queen's Pawn Game 1 game 0W 1D 0L
Zukertort Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Blunders Top 4 of 133

This player's costliest moves in analyzed games. Can you find the winning move?

2024.11.22 · 20... Rb8 (−35.3% win chance) 1-0
Kostowski, Ireneus, Dr.
Liau, Kelly
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2024.01.26 · 48... Qg3+ (−32.4% win chance) 1/2-1/2
Ireneus, Dr. Kostowski
Lilian Schirmbeck
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2024.01.26 · 46... Qb8 (−32.1% win chance) 1/2-1/2
Ireneus, Dr. Kostowski
Lilian Schirmbeck
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2026.08.21 · 15. Bb5 (−30.3% win chance) 0-1
Solski, Maksymilian
Kostowski, Ireneus, Dr.
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Games Showing all 24 games
Date Event Round Color Opponent Result Accuracy % First moves