A classic chess puzzle, featured in The 7th Guest, in which the goal is for the black and white bishops to switch places. No piece may move onto a square where it could be captured.


Hover over a to see how it can move:
You can move here safely
You've moved here before
Square attacked by another
To move, click a on any , then choose a . A new will appear with this move applied.
Click & drag a to reposition it. Reset all by clicking the icon.
Click or right click a to get AI assistance.