Nine Men's Morris

Mills is a strategy game dating back to at least the Roman Empire.

It is played on a board with 24 intersections. Each player places nine pieces on the board and creates mills to remove capture pieces from the opponent. A player wins by reducing the opponent to two pieces or leaving them without a legal move.

Phase 1: Placement

Players take turns placing a piece on an empty point. If a player can place three pieces in a straight line, they form a mill and can remove a piece from the opponent. An opponent's mill may only be broken if there are no other pieces available.

Phase 2: Moving

When all pieces have been placed, players take turns moving one piece per turn to an adjacent, vacant point, continuing to form mills and capture opponent's pieces.

Phase 3: Flying

When a player is reduced to three pieces, they are no longer bound to adjacent intersections, but can jump to any vaccant point.

The Board

+-------------+-------------+
|             |             |
|    +--------+--------+    |
|    |        |        |    |
|    |    +---+---+    |    |
|    |    |       |    |    |
+----+----+       +----+----+
|    |    |       |    |    |
|    |    +---+---+    |    |
|    |        |        |    |
|    +--------+--------+    |
|             |             |
+-------------+-------------+