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Player profile

Heidenfeld, Mark

Standard: 2296 Rapid: 2367 Blitz: 2256 (last updated 2026-11-02)
FIDE ID: 2500990 (view FIDE profile)
Federation: IRL Sex: M Birth Year: 1968 Age: 58
Title: IM Women's title: — Other title: — FOA title: —
Games: 20 Wins: 7 (35%) Draws: 7 (35%) Losses: 6 (30%)
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Dossier

20 of 20 games analyzed.

Accuracy: 84.7%
Opened e4: 8/8
Castled kingside: 15Same-side castling: 13Castled queenside: 4Opposite-side castling: 3
Played in the center: 9Played on the queenside: 4Fianchettoed queenside: 3Played on the kingside: 3Fianchettoed kingside: 1
Sacrificed material: 14Space advantage: 14Backward pawn: 11Active pieces: 10Initiated exchanges: 10Kept the bishop pair: 8Isolated pawn: 8Missed tactics: 6Played gambits: 5Avoided exchanges: 4
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Openings

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

As White 8 games 4W 3D 1L
Sicilian Defense 3 games 2W 1D 0L
Accelerated Dragon 1 game 0W 1D 0L
Modern Variation 1 game 0W 1D 0L
Chekhover Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Lasker-Pelikan Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
French Defense 3 games 1W 2D 0L
Classical Variation 2 games 1W 1D 0L
(unspecified) 1 game 0W 1D 0L
Burn Variation 1 game 1W 0D 0L
Rubinstein Variation 1 game 0W 1D 0L
Blackburne Defense 1 game 0W 1D 0L
Pirc Defense 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Nimzowitsch Defense 1 game 1W 0D 0L
Kennedy Variation 1 game 1W 0D 0L
Riemann Defense 1 game 1W 0D 0L
As Black 11 games 3W 4D 4L
French Defense 5 games 3W 2D 0L
Rubinstein Variation 2 games 1W 1D 0L
Blackburne Defense 2 games 1W 1D 0L
Classical Variation 1 game 0W 1D 0L
Delayed Exchange Variation 1 game 0W 1D 0L
Tarrasch Variation 1 game 1W 0D 0L
Closed Variation 1 game 1W 0D 0L
Exchange Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
English Opening 2 games 0W 0D 2L
King's English Variation 2 games 0W 0D 2L
Four Knights Variation, Fianchetto Line, with Nb6 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Rat Defense 1 game 0W 0D 1L
English Rat 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Queen's Pawn Game 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Semi-Slav Defense 1 game 0W 1D 0L
Main Line 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Nimzo-Indian Defense 1 game 0W 1D 0L
Classical Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Blunders Top 4 of 126

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

2026.08.23 · 34. Ke4 (−74.1% win chance) 1/2-1/2
Sagues, Vincent
Heidenfeld, Mark
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2026.08.23 · 53... Qe1 (−66.2% win chance) 1-0
Heidenfeld, Mark
Fernandez, Michael
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2026.08.23 · 21... d5 (−49.8% win chance) 1/2-1/2
Heidenfeld, Mark
Mostyn, Gregory
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2026.08.23 · 28... Kh7 (−43.7% win chance) 1-0
Heidenfeld, Mark
Zhao, George
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View blunders & mistakes
Games Showing all 20 games
Date Event Round Color Opponent Result Accuracy % First moves