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Yeung, On Sum

Standard: 1477 Rapid: 1440 Blitz: 1567 (last updated 2026-10-03)
FIDE ID: 6021905 (view FIDE profile)
Federation: HKG Sex: M Birth Year: 2013 Age: 13
Title: — Women's title: — Other title: — FOA title: —
Games: 7 Wins: 2 (29%) Draws: 2 (29%) Losses: 3 (43%)
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Dossier

7 of 7 games analyzed.

Accuracy: 87.6%
Opened b3: 3/3
Castled kingside: 4Same-side castling: 4Opposite-side castling: 3Castled queenside: 3
Fianchettoed queenside: 3Played on the queenside: 3Played in the center: 2Played on the kingside: 1
Active pieces: 5Sacrificed material: 5Backward pawn: 5Space advantage: 4Missed tactics: 3Initiated exchanges: 3Kept the bishop pair: 2Avoided exchanges: 2Accepted short draws: 1Played gambits: 1
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Openings

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As White 3 games 1W 1D 1L
Nimzo-Larsen Attack 3 games 1W 1D 1L
Modern Variation 2 games 1W 0D 1L
(unspecified) 2 games 1W 0D 1L
Classical Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
As Black 4 games 1W 1D 2L
Queen's Pawn Game 2 games 1W 0D 1L
London System 2 games 1W 0D 1L
with e6 2 games 1W 0D 1L
Caro-Kann Defense 1 game 0W 1D 0L
Classical Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
French Defense 1 game 0W 0D 1L
Winawer Variation 1 game 0W 0D 1L
Advance Variation 1 game 0W 0D 1L
Blunders Top 4 of 35

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

2026.07.31 · 21. Rd4 (−30.2% win chance) 0-1
Zeng, Yiyang
Yeung, On Sum
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2026.08.01 · 40... gxf5 (−25.7% win chance) 0-1
Yeung, On Sum
Wong, Ching Long
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2026.08.02 · 17. Bxc5 (−24% win chance) 1-0
Zhang, Zhiyu
Yeung, On Sum
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2026.08.02 · 16. c5 (−23.1% win chance) 1-0
Zhang, Zhiyu
Yeung, On Sum
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View blunders & mistakes
Games Showing all 7 games
Date Event Round Color Opponent Result Accuracy % First moves