Three Musketeers is played on a 5×5 board with the following setup:

Player 1 can move a one orthogonal step to any square occupied by an enemy , which is captured. The cannot move to an empty square.

Player 2 can move a one orthogonal step to a vacant square.

The game can end in two ways:

• musketeersinline: If all 3 are in the same row or column, Player 2 wins
• strandedmusketeers: If Player 1 has no valid moves, she wins