Nine Men's Morris Rules: How to Play, Phases & Strategy

Nine Men's Morris is a two-player strategy game played on 24 points. Players form lines of three stones (mills) to capture opponent pieces, aiming to reduce the opponent to two stones or block all their legal moves.

Board Setup and Objective

The board consists of three concentric squares connected by four perpendicular lines across the middle of each side. This creates exactly 24 points (intersections and corners). Each player starts with nine pieces of their color (white or black). The game begins with an entirely empty board.

Victory is achieved by capturing enough opponent pieces to leave them with only two stones, or by completely surrounding the opponent so that they have no legal moves remaining on their turn.

The Rules in Detail

A game of Nine Men's Morris progresses through three distinct phases:

1. The Placement Phase

Players take turns placing one stone at a time onto any unoccupied point on the board. Mills can already be formed in this phase. Whenever a player completes a row of three, they immediately choose and remove one opponent piece from the board.

2. The Movement Phase

Once all 18 pieces have been placed, players take turns sliding one of their stones along a board line to an adjacent vacant point. Jumping over other pieces or skipping points is strictly prohibited in this phase.

3. The Flying Phase

When a player is reduced to exactly three stones, they enter the flying phase. That player may now jump (fly) with any stone to any vacant point on the entire board, ignoring connecting lines. The other player must continue moving along adjacent lines as long as they retain four or more pieces.

Closing Mills and Capturing Stones

A mill is formed whenever three stones of the same color align horizontally or vertically on connected points. When a mill is closed, the player removes one opponent stone permanently from the board.

Protected stones rule: Pieces that are currently part of an opponent's closed mill cannot be captured, unless the opponent has no other pieces available outside of mills. In that case, any stone may be taken.

Strategy for Beginners

Strong openings and territorial control create lasting advantages:

• Control Cross Points: The central intersections offer four movement directions, while corners offer only two. Controlling the middle maintains mobility throughout the midgame.
• Build a Running Mill (Double Mill): The most lethal tactic occurs when a single stone shuttles between two incomplete mills, completing a capture with every turn.
• Block Enemy Traps Early: Whenever an opponent places two stones on a line, immediately occupy the third point to block the impending mill.
• Keep Escape Paths Open: Having more stones is useless if all your pieces are trapped and immobilized.

Origins and History

Nine Men's Morris is one of the oldest strategy games known to humanity. Carved boards have been uncovered in ancient Egyptian temples at Kurna (dating back to 1400 BC), on Roman tiles, and in Viking burials. Throughout medieval Europe, it was a celebrated noble pastime alongside Chess and Backgammon.

Special Features of this Edition

On YesssGames, Nine Men's Morris is built for calm, distraction-free gaming:

• No Animations: Instant placement without flicker – ideal for E-Ink.
• Tabletop Mode (180°): Flip Player 2's side for face-to-face play.
• Minimax AI: Tactical computer opponent for solo practice.
• Instant Undo: Misclicks undone with a single tap.
• 100% Cookie-Free: No registration, ads, or tracking.

Frequently Asked Questions (FAQ)

Can you capture a piece from a closed mill?

Generally no. Stones inside an active mill are protected. You may only capture a stone from a mill if the opponent has no other stones left outside of mills.

When exactly is jumping allowed?

Jumping (flying) is permitted only when a player has been reduced to exactly three stones. While you hold four or more, you must slide along connected lines.

When does a game end in a draw?

A game is drawn if both players are reduced to three stones and no progress is made, or if the exact same board position repeats three times.

Can you open and close the same mill repeatedly?

Yes. Moving a stone out of a mill and returning it on the next turn is a standard winning tactic, granting a new capture each time the line is reformed.

What happens if a player has no legal moves?

If a player cannot move any stone on their turn because all pieces are blocked, they lose the game immediately.