Germany

ID: 4689615

Ireneus Kostowski

FIDE ratings

1,825Classical

Performance

50 games

40% Win

18% Draw

42% Loss

Ireneus Kostowski's playing style

Overall score:49%20W 9D 21L over 50 games

Dominates e4 vs 1.e4/1.d4 as Black:67%in 15 games

Strongest in classical:50%in 49 games

Steady recent form:48%9W 1D 10L in last 20 games

Openings as White

Among the openings shown, Slav Indian has the largest White sample, with 2 games. Select a row to explore its moves and inspect example games below.

Slav Indian

100%

Queen's Gambit Declined

100%

Queen's Gambit Declined: Traditional Variation

100%

Queen's Gambit Declined: Chigorin Defense

100%

King's Indian Defense: Normal Variation

100%

Openings as Black

Among the openings shown, Semi-Slav Defense has the largest Black sample, with 2 games. These results describe the available sample, not a prediction of the player’s next choice.

Semi-Slav Defense

100%

King's Indian Attack

100%

Benoni Defense

100%

Repertoire

26 games as white in scope

Move arrowsfrequency, not engine evaluation

Starting position

26 games in this line · White to move

Results for Kostowski, Ireneus, Dr. as white · Wins / Draws / Losses

W / D / L

31%

19%

50%

Move
	26 · 100%	1y ago	31% 19% 50%

Game History

(50 games)

Date	Source	Opponent	Result	Time	Event	Opening	Link
Aug 24, 2025	OTB - TWIC	Trybus, Dominika(1870)	L	Classical	Rubinstein Mem Open B	D00ayQueen's Pawn Game: Accelerated London System	—
Aug 23, 2025	OTB - TWIC	Bednarski, Jan(1785)	W	Classical	Rubinstein Mem Open B	B01aeScandinavian Defense: Portuguese Gambit, Correspondence Refutation	—
Aug 22, 2025	OTB - TWIC	Szwed, Karol(1799)	W	Classical	Rubinstein Mem Open B	A45cIndian Defense: Accelerated London System	—
Aug 21, 2025	OTB - TWIC	Jamka, Wojciech(1701)	L	Classical	Rubinstein Mem Open B	A56Benoni Defense	—
Aug 20, 2025	OTB - TWIC	Komendecki, Grzegorz(1833)	W	Classical	Rubinstein Mem Open B	D00azQueen's Pawn Game: Accelerated London System, Steinitz Countergambit	—
Aug 19, 2025	OTB - TWIC	Wojtowicz, Marek(1805)	L	Classical	Rubinstein Mem Open B	B01aiScandinavian Defense: Portuguese Gambit, Melbourne Shuffle Variation	—
Aug 18, 2025	OTB - TWIC	Soszka, Szymon(1801)	D	Classical	Rubinstein Mem Open B	A45cIndian Defense: Accelerated London System	—
Aug 17, 2025	OTB - TWIC	Hampel, Anna(1800)	W	Classical	Rubinstein Mem Open B	B01ajScandinavian Defense: Portuguese Gambit, Wuss Variation	—
Aug 16, 2025	OTB - TWIC	Ratajek, Krzysztof(1769)	L	Classical	Rubinstein Mem Open B	A45cIndian Defense: Accelerated London System	—
May 31, 2025	OTB - LichessBroadcast	Arp, Piotr Alexander(1875)	L	Bullet (0+2)	XII KATOWICKI FESTIWAL SZACHOWY – OPEN \| Boards 1-100	A48East Indian Defense	—

Research Ireneus, Dr. Kostowski’s games and opening repertoire

Ireneus, Dr. Kostowski is rated 1825 in standard by FIDE. Ireneus, Dr. Kostowski plays for Germany.

Ireneus, Dr. Kostowski has FIDE ID 4689615.

Check the official FIDE record for ratings and identity. It is not a complete archive of game moves.

Use the openings as White and Black to identify recurring choices in the available games. Follow a branch into the repertoire explorer and inspect example games in the game history. Dates, time controls and sources affect which patterns are relevant to your next match.

See the top players in Germany

Ireneus Kostowski

FIDE ratings

Performance

Ireneus Kostowski's playing style

Openings as White

Openings as Black

Repertoire

Starting position

Games in this line

Game History

Research Ireneus, Dr. Kostowski’s games and opening repertoire

Players from Germany with a similar rating