Add link to readme.
Bold play link.
Minor clean up.
Better promotion checking.
Place all piece in 0, 0 and move them with top/bottom left/right.
Fixed castling.
Re-arranged some code.
Be able to do two human players.
En passant
Promotion (but only to queen)
Only move on left click.
is checkmated
Underpromotion
Slightly better opacity.
AI vs AI works.
50 move rule.
Be able to create a new game without reloading.
Be able to stop the game.
Detect three-fold repetition.
Make sure there are moves.

I hit this error when I was in the middle of moving a piece when the game ended (three-fold repetition).