Chess Clock Analyser
See how the clock shaped your game.
Private. Everything runs in your browser — nothing is uploaded.
- A username loads that player's recent games. Pick one, or build a time profile to review yourself, scout an opponent or coach a student.
- A game link opens that game. For Chess.com links, also enter the username of one of the players.
- A PGN needs clock times (
[%clk …]). Lichess and Chess.com include them in their PGN exports. - Games are downloaded straight from Lichess or Chess.com to your browser. Stockfish runs on your device. The sample game is a demo with illustrative clock times.
Analysing…
Games
Time profile
See habits and advice across all these games.
Time profile
Time remaining
Evaluation
More charts
Key moments
Time spent per move
Hover or tap a chart to see a move · click to show it on the board · ← → to step
Insights
All insights and tables
Time by phase
Mistakes by clock
Average evaluation drop per move (lower is better), by time left and by time spent.
Key moments
More moments
Should have thought here
Only one move kept the balance, and the player moved faster than their average and missed it.
All moves
▲ blunder · ✕ rushed error · ○ should have thought · ◆ big think · ★ time trouble · ✎ note