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Player profile

Bosak, Jan

Standard: 2052 Rapid: 2021 Blitz: 2017 (last updated 2026-11-02)
FIDE ID: 314692 (view FIDE profile)
Federation: CZE Sex: M Birth Year: 1961 Age: 65
Title: — Women's title: — Other title: NA FOA title: —
Games: 31 Wins: 11 (35%) Draws: 9 (29%) Losses: 8 (26%) Other: 3
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Dossier

23 of 31 games analyzed.

Accuracy: 91.4%
Opened Nf3: 3/9Opened d4: 3/9Opened e4: 2/9Opened c4: 1/9
Castled kingside: 16Same-side castling: 13Did not castle: 2Opposite-side castling: 1Castled queenside: 1
Played in the center: 9Played on the kingside: 5Played on the queenside: 4Fianchettoed queenside: 2Fianchettoed kingside: 1
Active pieces: 14Sacrificed material: 12Initiated exchanges: 11Isolated pawn: 10Kept the bishop pair: 10Missed tactics: 6Space advantage: 6Backward pawn: 5Avoided exchanges: 3Accepted short draws: 3
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Openings

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As White 13 games 7W 3D 2L
English Opening 3 games 1W 1D 0L
Mikenas-Carls Variation 2 games 1W 1D 0L
(unspecified) 2 games 1W 1D 0L
King's English Variation 1 game 0W 0D 0L
Four Knights Variation, Quiet Line 1 game 0W 0D 0L
Queen's Gambit Declined 3 games 0W 2D 1L
Ragozin Defense 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Three Knights Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Baltic Defense 1 game 0W 1D 0L
Argentinian Gambit 1 game 0W 1D 0L
Sicilian Defense 1 game 1W 0D 0L
Alapin Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
French Defense 1 game 1W 0D 0L
Advance Variation 1 game 1W 0D 0L
Euwe Variation 1 game 1W 0D 0L
Zukertort Opening 1 game 1W 0D 0L
Pirc Invitation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Semi-Slav Defense 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Slav Defense 1 game 1W 0D 0L
Three Knights Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Queen's Pawn Game 1 game 1W 0D 0L
Chigorin Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
King's Indian Defense 1 game 0W 0D 1L
Sämisch Variation 1 game 0W 0D 1L
Sämisch Gambit 1 game 0W 0D 1L
As Black 14 games 4W 4D 4L
French Defense 9 games 2W 3D 3L
Exchange Variation 5 games 2W 2D 0L
(unspecified) 5 games 2W 2D 0L
Tarrasch Variation 2 games 0W 0D 2L
Modern System 2 games 0W 0D 2L
Winawer Variation 1 game 0W 1D 0L
Alekhine-Maróczy Gambit 1 game 0W 1D 0L
King's Indian Attack 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Scotch Game 1 game 0W 0D 1L
Classical Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
London System 1 game 0W 0D 0L
(unspecified) 1 game 0W 0D 0L
(unspecified) 1 game 0W 0D 0L
Ruy Lopez 1 game 1W 0D 0L
Morphy Defense 1 game 1W 0D 0L
Arkhangelsk Variation 1 game 1W 0D 0L
English Opening 1 game 1W 0D 0L
King's English Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Grünfeld Defense 1 game 0W 1D 0L
Exchange Variation 1 game 0W 1D 0L
Modern Exchange Variation 1 game 0W 1D 0L
Blunders Top 4 of 76

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

2026.04.03 · 32... c3 (−42% win chance) 1-0
Bosak, Jan
Bokhnak, Tymofii
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2025.09.12 · 18... Ng3 (−39.4% win chance) 1-0
Bosak, Jan
Mikyska, Kamil
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2025.09.10 · 36... Bc5 (−28.1% win chance) 1/2-1/2
Bosak, Jan
Musil, Vitezslav
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? · 13... Qc7 (−28.1% win chance) 1-0
Bosak, Jan
Babula, Matej
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View blunders & mistakes
Games Showing all 31 games
Date Event Round Color Opponent Result Accuracy % First moves