9 Mens Morris is a free iPhone game developed by Uwe Meier. This game is a classic strategy board game where each player has nine pieces, or "men", which they move around the board's twenty-four spots. The objective of the game is to leave the opposing player with fewer than three pieces or no legal moves, similar to checkers.

The game starts with an empty board, and players take turns placing their pieces on empty spots. If a player is able to form a row of three pieces along one of the board's lines, they have a "mill" and can remove one of their opponent's pieces from the board. Removed pieces cannot be placed again, and players must remove any other pieces before removing a piece from a formed mill.

Once all eighteen pieces have been placed, players take turns moving their pieces. A player can slide one of their pieces along a board line to an empty adjacent spot. If a player cannot make a move, they have lost the game.

Strategic thinking and planning are key in 9 Mens Morris, as players try to outmaneuver their opponents and create mills to remove their pieces. The game offers a challenging and engaging experience for fans of strategy board games.