Nine Men's Morris Rules — Complete Guide to the Mill Game

Nine Men's Morris is a two-player strategy game played on a board of 24 intersections, with 9 men per player. Players alternate placing men on empty points, then slide them along lines to adjacent points. Forming a mill — three of your men on one of the 16 straight lines — removes one enemy man from the board. A man standing in an enemy mill is protected unless every enemy man is in a mill. You win when your opponent is reduced to two men or has no legal move on their turn.

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Board, men and placing

The board has 24 points: three concentric squares joined by four lines through the middle of each side. There are no diagonal lines — the 16 mill lines are exactly the 8 horizontals and 8 verticals drawn on the board.

Each player has 9 men, one dark set and one light set. By convention the dark side moves first.

Stage one — placing: players alternate setting one man on any empty point until all 18 men stand on the board.

Mills and captures

A mill is three men of one colour on a straight board line — horizontal or vertical only.

Completing a mill (by placing or by moving) lets you remove one enemy man; removed men never return.

The mill exception: a man standing in an enemy mill may not be removed while that player has any other man — but if every enemy man stands in a mill, any man may be taken.

Even if a single move completes two mills at once, only one man may be removed.

Moving, flying and re-opening mills

Stage two — moving: slide one of your men along a marked line to an adjacent empty point. Men never jump over other men.

A player reduced to exactly three men may fly: move a man to any vacant point, not just an adjacent one. Only the three-man side flies.

You may break your own mill and later re-form it — the same mill may be opened and closed again and again, and every new closure earns another capture. This open-and-shut tactic is the classic way to grind down an opponent.

Winning, losing and draws

You win when the opponent is reduced to two men (too few to form a mill), or when they have no legal move on their turn.

Draws on this site: the same position occurring three times, or 50 consecutive moves without a capture, end the game as a draw — both are standard safeguards against endless shuffling.

A 300-move safety limit guarantees every game finishes.

Each move allows 40 seconds; if time runs out or a player disconnects, an automated assistant plays that move.

Quick tips for beginners

In the placing phase, favour versatile crossings — points where two or more mill lines meet (like d7 or d5) are worth more than corners.

Build double threats: two lines sharing one empty point cannot both be blocked.

Keep men mobile; a stuck man is a liability once the moving phase starts.

When ahead, build a "mill shuttle": one man opens and re-closes a mill every move, earning a capture each time.

Watch the flying rule — never let the opponent reach three men comfortably; take men that keep them above three.

Frequently asked questions

What is Nine Men's Morris?

Nine Men's Morris (the mill game, merels) is a two-player strategy board game played on 24 points with 9 men per player. Players win by forming mills — three in a row — and removing enemy men until the opponent has two left or no legal move.

How many pieces are in Nine Men's Morris?

Nine men per player, 18 in total. That is the key difference from the twelve-man variant (twelve men's morris), which gives each side twelve pieces and adds diagonal lines.

Does the board have diagonals?

No. The Nine Men's Morris board has 16 mill lines — 8 horizontal and 8 vertical. Diagonal lines belong to the twelve-man variant, which has 20 lines on the same 24-point grid.

What happens when you form a mill?

You remove one enemy man from the board. A man inside an enemy mill is protected while that player has any other man; if every enemy man stands in a mill, any man may be taken.

Can I open and close the same mill repeatedly?

Yes. Moving a man out of a mill and back to re-form it earns a new capture each time — this shuttle is the classic winning technique. Every closure removes exactly one man.

How does flying work?

A player with exactly three men may move to any empty point on the board, not just adjacent ones. Only the three-man side flies.

How do you win in Nine Men's Morris?

Reduce your opponent to two men, or leave them without a legal move on their turn. With perfect play from both sides the game is a theoretical draw, so decisive wins usually come from mill shuttles.

When is the game a draw?

On this site the same position occurring three times, or 50 consecutive moves without a capture, is a draw; a 300-move safety limit also applies. These safeguards prevent endless shuffling.

Can I play Nine Men's Morris online for free?

Yes — play Nine Men's Morris online free at morris.yeeqia.com, straight in your browser with no download or sign-up required.

Does it work on mobile?

Yes, the site is mobile-first and runs in any modern browser on Android or iPhone, with a full English interface.