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Player profile

Wierenga, Haijo Deyou

Standard: 1474 Rapid: 1547 Blitz: 0 (last updated 2026-11-02)
FIDE ID: 343472966 (view FIDE profile)
Federation: ENG
Federation: ENG Sex: M Birth Year: 2014 Age: 12
Title: — Women's title: — Other title: — FOA title: —
Games: 7 Wins: 1 (14%) Draws: 2 (29%) Losses: 4 (57%)
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Dossier

7 of 7 games analyzed.

Accuracy: 84.8%
Opened Nf3: 3/3
Castled kingside: 5Same-side castling: 4Opposite-side castling: 2Castled queenside: 2
Fianchettoed kingside: 6Played on the kingside: 2Played on the queenside: 2Played in the center: 1
Space advantage: 5Active pieces: 5Kept the bishop pair: 4Initiated exchanges: 4Isolated pawn: 4Backward pawn: 4Missed tactics: 2Avoided exchanges: 2Played gambits: 1Sacrificed material: 1
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Openings

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As White 3 games 0W 1D 2L
Queen's Pawn Game 1 game 0W 1D 0L
Symmetrical Variation 1 game 0W 1D 0L
Pseudo-Catalan 1 game 0W 1D 0L
Zukertort Opening 1 game 0W 0D 1L
Sicilian Invitation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
King's Indian Attack 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
As Black 4 games 1W 1D 2L
London System, with Bd3 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Indian Defense 1 game 0W 0D 1L
Accelerated London System 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Caro-Kann Defense 1 game 0W 0D 1L
Advance Variation 1 game 0W 0D 1L
Tal Variation 1 game 0W 0D 1L
Zukertort Opening 1 game 0W 1D 0L
Black Mustang Defense 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Blunders Top 4 of 41

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

2026.08.03 · 27... Qf3 (−63.8% win chance) 1-0
Wierenga, Haijo Deyou
Ewart, Thomas
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2026.08.05 · 22... f6 (−36.6% win chance) 1-0
Wierenga, Haijo Deyou
Ranasinghe, R A Javinu Janudika
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2026.08.03 · 25... Rg3 (−36% win chance) 1-0
Wierenga, Haijo Deyou
Ewart, Thomas
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2026.08.03 · 32... e5 (−33.7% win chance) 1-0
Wierenga, Haijo Deyou
Ewart, Thomas
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View blunders & mistakes
Games Showing all 7 games
Date Event Round Color Opponent Result Accuracy % First moves