Chess Blunder Heatmap

See which phase, piece and square keep costing you games. Everything runs in your browser.

Starting…

Blunder heatmap

Dark pink = 1 blunder.Bright red/neon = 2+ blunders.

Game Length Summary

Move number when each loss ended: Opening (15 or less), Middlegame (16-35), Endgame (36+).

Blunder Phase Audit

Phase of the biggest blunder in each analyzed loss.

Waiting for the engine…

Blunders by piece

Waiting for the engine…

Worst blunders

OpponentMoveBetter wasDropPhase
No blunders found yet.

Analyzed games