iwillnotblunder
EN
中文
Apply FEN
Start position
Show/Hide overlay (A)
Opponent only (O)
Mine only (M)
Hide (H)
Switch my side (White/Black)
Hotkeys: A show/hide (keep last side) / O opponent / M mine / H hide
Drag or click to move; overlay updates in real time
Red: opponent control; Blue: my control. Opacity scales linearly with count.