military_techStrategy Game

Nine Men's Morris

Form mills of three to remove your opponent's pieces

White Hand 9
White Board 0
White's Turn
Black Board 0
Black Hand 9
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How to Play
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1. Place your 9 pieces on the board one at a time. Form a mill (3 in a row) to remove an opponent piece.
2. Once all pieces are placed, slide pieces along lines to form new mills.
3. Win by reducing your opponent to 2 pieces or blocking all their moves.
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Expert Tips
Double threat: Prioritise positions that threaten two mills simultaneously — your opponent can only block one at a time.
Plan for flying: When down to 3 pieces you can jump anywhere — set up that freedom from the mid-game onwards.
account_tree Strategic Planning
lightbulb Forward Thinking
balance Decision Making

How to Play — Nine Men's Morris

Goal

Reduce your opponent to 2 pieces, or leave them with no legal moves. Each player starts with 9 pieces.

Phase 1 Placement

Players take turns placing one piece per turn onto any empty point on the board. There are 24 points total.

  • White always goes first.
  • Watch the Hand counter — it shows how many pieces you have left to place.
  • Try to build towards mills while blocking your opponent.

Forming a Mill

A mill is 3 of your pieces in a straight line along the board. Every time you form a mill, you remove one of your opponent's pieces.

  • You cannot remove a piece that is part of a mill — unless all opponent pieces are in mills.
  • Removable pieces are highlighted in red — click one to remove it.
  • You can break and reform the same mill to keep removing pieces.

Phase 2 Movement

Once all 9 pieces are placed, players slide one piece per turn to an adjacent connected point.

  • Click your piece to select it — valid destinations glow yellow.
  • Click a highlighted point to move there.
  • You cannot jump over other pieces.
  • If you have no legal moves, you lose.

Flying Endgame

When a player is reduced to exactly 3 pieces, they can fly — moving their piece to any empty point on the board, not just adjacent ones.

Win Conditions

  • Opponent is reduced to fewer than 3 pieces.
  • Opponent has no legal moves on their turn.

Visual Legend

White piece
Black piece
Selected piece / valid move destination
Removable opponent piece (after forming a mill)
Where the computer just moved (green = destination)
Where the computer moved from (dashed = origin)

Tips

Build towards two mills that share a piece — sliding it back and forth lets you remove an opponent piece every single turn.
Why this sharpens your mind

Strategic Planning

Nine Men's Morris requires thinking several moves ahead — placing pieces with future mills in mind trains forward planning and executive function, the brain's highest-order control system.

Pattern Recognition

Recognising mill threats and opportunities across the board exercises rapid pattern detection — the same skill used in chess, problem-solving, and reading complex situations quickly.

Adaptive Thinking

Playing against an AI that adjusts its strategy forces you to update your plan in real time — training cognitive flexibility, the ability to switch approaches when circumstances change.

Game Over