Chess Games DB
Find player games & weaknesses
Log in
Player profile

Kosiorek, Marek

Standard: 2191 Rapid: 2217 Blitz: 2120 (last updated 2026-11-02)
FIDE ID: 1110284 (view FIDE profile)
Federation: POL Sex: M Birth Year: 1976 Age: 50
Title: FM Women's title: — Other title: — FOA title: —
Games: 20 Wins: 7 (35%) Draws: 6 (30%) Losses: 7 (35%)
View all games
Dossier

13 of 20 games analyzed.

Accuracy: 90.4%
Opened e4: 6/6
Castled kingside: 11Same-side castling: 10Did not castle: 1Castled queenside: 1
Played on the kingside: 4Played on the queenside: 3Fianchettoed queenside: 2Fianchettoed kingside: 1Played in the center: 1
Sacrificed material: 10Initiated exchanges: 8Kept the bishop pair: 7Space advantage: 7Isolated pawn: 7Active pieces: 6Backward pawn: 4Avoided exchanges: 3Missed tactics: 3Played gambits: 1
View full dossier Analyze this player's games
Openings

Click "+" to add that group to the games list below. Multiple groups can be added at once.

As White 10 games 6W 2D 2L
Sicilian Defense 8 games 5W 2D 1L
Delayed Alapin Variation 4 games 4W 0D 0L
with d6 3 games 3W 0D 0L
with e6 1 game 1W 0D 0L
Hyperaccelerated Dragon 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Nyezhmetdinov-Rossolimo Attack 1 game 0W 1D 0L
Fianchetto Variation 1 game 0W 1D 0L
O'Kelly Variation 1 game 0W 1D 0L
Venice System 1 game 0W 1D 0L
Modern Variations 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
French Defense 1 game 1W 0D 0L
Alekhine-Chatard Attack 1 game 1W 0D 0L
Maróczy Variation 1 game 1W 0D 0L
Caro-Kann Defense 1 game 0W 0D 1L
Advance Variation 1 game 0W 0D 1L
Tal Variation 1 game 0W 0D 1L
As Black 10 games 1W 4D 5L
Benoni Defense 2 games 1W 1D 0L
Old Benoni 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Semi-Benoni 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Sicilian Defense 2 games 0W 1D 1L
Taimanov Variation 1 game 0W 0D 1L
Bastrikov Variation 1 game 0W 0D 1L
Scheveningen Variation 1 game 0W 1D 0L
Keres Attack 1 game 0W 1D 0L
Caro-Kann Defense 2 games 0W 2D 0L
Apocalypse Attack 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Advance Variation 1 game 0W 1D 0L
Tal Variation 1 game 0W 1D 0L
Modern Defense 1 game 0W 0D 1L
Standard Defense 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
English Opening 1 game 0W 0D 1L
Agincourt Defense 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Scotch Game 1 game 0W 0D 1L
Mieses Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Semi-Slav Defense 1 game 0W 0D 1L
Chigorin Defense 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Blunders Top 4 of 57

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

2025.05.31 · 46. Be3 (−42% win chance) 1-0
Bachor, Tomasz
Kosiorek, Marek
View game
2025.05.31 · 19... Bf6 (−35.6% win chance) 1-0
Kosiorek, Marek
Warchol, Kamil
View game
2024.09.19 · 31. Rd8+ (−33.3% win chance) 0-1
Mika, Tomasz
Kosiorek, Marek
View game
2024.09.21 · 28. Rxe5 (−30.4% win chance) 1/2-1/2
Zakrzewski, Marek
Kosiorek, Marek
View game
View blunders & mistakes
Games Showing all 20 games
Date Event Round Color Opponent Result Accuracy % First moves