Objective

The goal of Nine Men's Morris is to form "mills" (three pieces in a row) to remove opponent's pieces from the board. A player wins when the opponent is reduced to two pieces (unable to form mills) or is unable to make a legal move.

Setup

• The game is played on a board with 24 points (intersections).
• Each player has nine pieces (different color for each player).
• The board consists of three nested squares connected by lines.
• Players take turns placing their pieces on unoccupied points.

Playing The Game

The game has three phases:

1. Placing Pieces (Phase 1)

• Players take turns placing one piece at a time on any empty point.
• If a player forms a mill (three in a row along a line), they remove an opponent's piece (not part of a mill unless no other pieces are available).

1. Moving Pieces (Phase 2)

• Once all pieces are placed, players take turns moving pieces to adjacent connected points.
• Forming a new mill allows removing another opponent’s piece.

1. Flying Phase (Phase 3, Only When a Player Has 3 Pieces Left)

• If a player is reduced to three pieces, they can "fly," moving to any empty point instead of only adjacent ones.

Winning The Game

• A player wins if the opponent:

1. Has only two pieces left (unable to form mills).
2. Cannot make a legal move (all pieces are blocked).

More

There is a very good and short video on YouTube explaining how to play Nine Men's Morris.

https://www.youtube.com/watch?v=lmFDibk7_qc