A Rithmomachy Example

showing how subtle and difficult this game is

White (Dumbot) to move.
starting position

White moves G8-H7, capturing black 3 by eruption.
white captures

Black moves L7-J7, capturing White 4 and 36 (from the white pyramid) both by eruption.
black captures

White moves H7-J6, winning the game by forming the arithmetic series 9 30 51
winning move