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Player profile

Jerez Perez, Alfonso

Standard: 2314 Rapid: 2348 Blitz: 2357 (last updated 2026-11-02)
FIDE ID: 2204100 (view FIDE profile)
Federation: ESP Sex: M Birth Year: 1971 Age: 55
Title: IM Women's title: — Other title: — FOA title: —
Games: 34 Wins: 11 (32%) Draws: 16 (47%) Losses: 7 (21%)
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Dossier

32 of 34 games analyzed.

Accuracy: 92.2%
Opened e4: 15/16Opened Nf3: 1/16
Castled kingside: 22Same-side castling: 20Did not castle: 5Castled queenside: 2Opposite-side castling: 2
Fianchettoed kingside: 11Played on the queenside: 11Played in the center: 9Fianchettoed queenside: 7Played on the kingside: 5
Active pieces: 21Backward pawn: 20Sacrificed material: 19Space advantage: 18Initiated exchanges: 16Kept the bishop pair: 15Isolated pawn: 15Played gambits: 9Avoided exchanges: 7Missed tactics: 7
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Openings

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As White 18 games 6W 9D 3L
Sicilian Defense 7 games 1W 4D 2L
Alapin Variation 5 games 1W 3D 1L
(unspecified) 3 games 1W 1D 1L
Stoltz Attack 1 game 0W 1D 0L
Barmen Defense 1 game 0W 1D 0L
Delayed Alapin Variation 2 games 0W 1D 1L
(unspecified) 2 games 0W 1D 1L
French Defense 3 games 2W 1D 0L
Winawer Variation 1 game 1W 0D 0L
Bogoljubow Variation 1 game 1W 0D 0L
Advance Variation 1 game 1W 0D 0L
Euwe Variation 1 game 1W 0D 0L
Tarrasch Variation 1 game 0W 1D 0L
Open System, Euwe-Keres Line 1 game 0W 1D 0L
Pirc Defense 2 games 0W 2D 0L
(unspecified) 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Classical Variation 1 game 0W 1D 0L
Quiet System 1 game 0W 1D 0L
Four Knights Game 2 games 1W 1D 0L
Scotch Variation Accepted 2 games 1W 1D 0L
Main Line 2 games 1W 1D 0L
Scandinavian Defense 1 game 0W 1D 0L
Lasker Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Ruy Lopez 1 game 0W 0D 1L
Morphy Defense 1 game 0W 0D 1L
Fianchetto Defense Deferred 1 game 0W 0D 1L
English Opening 1 game 1W 0D 0L
Agincourt Defense 1 game 1W 0D 0L
Neo-Catalan Declined 1 game 1W 0D 0L
Alekhine Defense 1 game 1W 0D 0L
Exchange Variation 1 game 1W 0D 0L
Voronezh Variation 1 game 1W 0D 0L
As Black 13 games 4W 5D 4L
Four Knights Game 2 games 0W 2D 0L
Scotch Variation Accepted 1 game 0W 1D 0L
Main Line 1 game 0W 1D 0L
Gunsberg Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Grünfeld Defense 2 games 2W 0D 0L
Russian Variation 1 game 1W 0D 0L
Accelerated Variation 1 game 1W 0D 0L
Three Knights Variation 1 game 1W 0D 0L
Paris Variation 1 game 1W 0D 0L
English Opening 2 games 0W 0D 2L
King's English Variation 1 game 0W 0D 1L
Four Knights Variation, Korchnoi Line 1 game 0W 0D 1L
Anglo-Indian Defense 1 game 0W 0D 1L
Anti-Anti-Grünfeld 1 game 0W 0D 1L
Sicilian Defense 1 game 0W 1D 0L
Smith-Morra Gambit 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Ruy Lopez 1 game 0W 0D 1L
Morphy Defense 1 game 0W 0D 1L
Steinitz Deferred 1 game 0W 0D 1L
London System 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Italian Game 1 game 1W 0D 0L
Two Knights Defense 1 game 1W 0D 0L
Modern Bishop's Opening 1 game 1W 0D 0L
Scotch Game 1 game 1W 0D 0L
Romanishin Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
French Defense 1 game 0W 1D 0L
Chigorin Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Caro-Kann Defense 1 game 0W 1D 0L
Two Knights Attack 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Blunders Top 4 of 97

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

2025.12.30 · 17. Rf4 (−44% win chance) 0-1
Candelot, Clement
Jerez Perez, Alfonso
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2023.12.30 · 29. Rc8 (−29.2% win chance) 1/2-1/2
Seraphina Bosc
Alfonso Jerez Perez
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2026.03.18 · 40. Bd1 (−23.6% win chance) 1/2-1/2
Peralta, Fernando
Jerez Perez, Alfonso
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2023.12.30 · 20. Nf3 (−20.4% win chance) 1/2-1/2
Seraphina Bosc
Alfonso Jerez Perez
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View blunders & mistakes
Games Showing all 34 games
Date Event Round Color Opponent Result Accuracy % First moves