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Player profile

Sierra Pena, Mario

Standard: 1988 Rapid: 2031 Blitz: 1898 (last updated 2026-11-02)
FIDE ID: 24579122 (view FIDE profile)
Federation: ESP Sex: M Birth Year: 2008 Age: 18
Title: — Women's title: — Other title: — FOA title: —
Games: 34 Wins: 9 (26%) Draws: 6 (18%) Losses: 19 (56%)
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Dossier

29 of 34 games analyzed.

Accuracy: 88.1%
Opened Nf3: 6/11Opened c4: 2/11Opened e4: 1/11Opened d4: 1/11Opened b3: 1/11
Castled kingside: 21Same-side castling: 21Castled queenside: 2Opposite-side castling: 1Did not castle: 1
Fianchettoed kingside: 11Played in the center: 10Played on the kingside: 10Fianchettoed queenside: 9Played on the queenside: 3
Initiated exchanges: 18Backward pawn: 17Space advantage: 15Active pieces: 13Sacrificed material: 13Isolated pawn: 13Kept the bishop pair: 10Avoided exchanges: 5Missed tactics: 5Played gambits: 2
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Openings

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As White 11 games 5W 3D 3L
English Opening 3 games 1W 0D 2L
Symmetrical Variation 1 game 1W 0D 0L
Ultra-Symmetrical Variation 1 game 1W 0D 0L
Anglo-Indian Defense 1 game 0W 0D 1L
Old Indian Formation 1 game 0W 0D 1L
Great Snake Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Zukertort Opening 2 games 2W 0D 0L
Queen's Gambit Invitation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Nimzo-Larsen Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Sicilian Defense 1 game 0W 0D 1L
Delayed Alapin Variation 1 game 0W 0D 1L
with e6 1 game 0W 0D 1L
Queen's Pawn Game 1 game 0W 1D 0L
Colle System 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Yusupov-Rubinstein System 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Nimzo-Larsen Attack 1 game 0W 1D 0L
Symmetrical Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Rubinstein Opening 1 game 0W 1D 0L
Classical Defense 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Réti Opening 1 game 1W 0D 0L
Anglo-Slav Variation 1 game 1W 0D 0L
Bogoljubow Variation 1 game 1W 0D 0L
As Black 15 games 3W 1D 11L
Sicilian Defense 5 games 1W 0D 4L
Nyezhmetdinov-Rossolimo Attack 2 games 1W 0D 1L
Fianchetto Variation 2 games 1W 0D 1L
Lasker-Pelikan Variation 2 games 0W 0D 2L
Sveshnikov Variation, Chelyabinsk Variation 1 game 0W 0D 1L
Sveshnikov Variation, Novosibirsk Variation 1 game 0W 0D 1L
Kalashnikov Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
French Defense 4 games 0W 1D 3L
Rubinstein Variation 2 games 0W 1D 1L
Fort Knox Variation 2 games 0W 1D 1L
Advance Variation 1 game 0W 0D 1L
Wade Variation 1 game 0W 0D 1L
Tarrasch Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Indian Defense 2 games 0W 0D 2L
Accelerated London System 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Normal Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Bird Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Queen's Gambit Declined 1 game 0W 0D 1L
Three Knights Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
English Opening 1 game 0W 0D 1L
Symmetrical Variation 1 game 0W 0D 1L
Botvinnik System Reversed, with Nf3 1 game 0W 0D 1L
Bogo-Indian Defense 1 game 1W 0D 0L
Retreat Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Blunders Top 4 of 146

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

2025.07.26 · 5. Bg2 (−41.1% win chance) 1/2-1/2
Gomez Aguirre, Juan Alberto
Sierra Pena, Mario
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2026.02.15 · 40. Rh1 (−40% win chance) 1-0
Gutierrez Castellanos, Adrian
Sierra Pena, Mario
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2025.07.26 · 6. Nf3 (−35.7% win chance) 1/2-1/2
Gomez Aguirre, Juan Alberto
Sierra Pena, Mario
View game
2025.07.26 · 32. Qc7 (−35.4% win chance) 1/2-1/2
Gomez Aguirre, Juan Alberto
Sierra Pena, Mario
View game
View blunders & mistakes
Games Showing all 34 games
Date Event Round Color Opponent Result Accuracy % First moves