Chess Games DB
Find player games & weaknesses
Log in
Player profile

Ong, Jonathan Si Seng

Standard: 1705 Rapid: 1850 Blitz: 1900 (last updated 2026-11-02)
FIDE ID: 3249417 (view FIDE profile)
Federation: AUS Sex: M Birth Year: 2010 Age: 16
Title: — Women's title: — Other title: — FOA title: —
Games: 7 Wins: 1 (14%) Draws: 1 (14%) Losses: 5 (71%)
View all games
Dossier

7 of 7 games analyzed.

Accuracy: 81.3%
Opened e4: 2/2
Castled kingside: 6Same-side castling: 6
Played in the center: 3Played on the kingside: 2Fianchettoed kingside: 1Played on the queenside: 1
Kept the bishop pair: 4Sacrificed material: 4Initiated exchanges: 4Isolated pawn: 4Active pieces: 3Space advantage: 3Played gambits: 2Avoided exchanges: 2Missed tactics: 2Accepted short draws: 1
View full dossier
Openings

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

As White 2 games 0W 0D 2L
Four Knights Game 1 game 0W 0D 1L
Scotch Variation Accepted 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Sicilian Defense 1 game 0W 0D 1L
Lasker-Pelikan Variation 1 game 0W 0D 1L
Retreat Variation 1 game 0W 0D 1L
As Black 4 games 1W 1D 2L
French Defense 3 games 0W 1D 2L
Exchange Variation 2 games 0W 0D 2L
(unspecified) 2 games 0W 0D 2L
Tarrasch Variation 1 game 0W 1D 0L
Open System 1 game 0W 1D 0L
Semi-Slav Defense 1 game 1W 0D 0L
Main Line 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Blunders Top 4 of 28

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

2024.07.10 · 32... Qd7 (−92.8% win chance) 0-1
Ong, Jonathan Si Seng
Ottley, Matthew
View game
2026.01.18 · 14. Rad1 (−32.7% win chance) 0-1
Peramunetilleke, Savin
Ong, Jonathan Si Seng
View game
2024.07.10 · 22. Ng3 (−30.7% win chance) 0-1
Ng, Clive
Ong, Jonathan Si Seng
View game
2024.04.21 · 15... Bg4 (−26.1% win chance) 1-0
Ong, Jonathan Si Seng
Chakrabarty, Reyaansh
View game
View blunders & mistakes
Games Showing all 7 games
Date Event Round Color Opponent Result Accuracy % First moves