Nine Men's Morris is a classic two-player strategy game of building 'mills' — rows of three — to capture your opponent's pieces one by one. This free online version plays in your browser against a computer opponent, with no download or sign-up. It is easy to pick up in a single game, yet deep enough that it was a serious pastime for well over a thousand years.
You place, then slide your nine pieces around a distinctive board of three nested squares, always hunting for the next mill while stopping your opponent from forming theirs.
Nine Men's Morris is genuinely ancient. A board was found cut into a roofing slab of the temple at Kurna in Egypt, and while its exact date is debated, the game was unmistakably popular throughout the Roman Empire and medieval Europe. Boards are carved into cathedral cloisters, castle windowsills and the timbers of old ships, scratched there by bored monks, soldiers and sailors.
The game reached the height of its popularity in medieval England — Shakespeare even mentions it in A Midsummer Night's Dream, where 'the nine men's morris is filled up with mud.' Its blend of simple equipment and real strategic bite kept it alive for centuries, and it remains a favourite introduction to abstract strategy today.
The game has two phases. First, players take turns placing their nine pieces on empty points. Then, once all the pieces are down, they take turns sliding a piece along a line to an adjacent empty point. In both phases the aim is the same: form a mill — three of your pieces in a straight line along the board's marked lines.
Every time you complete a mill you remove one of your opponent's pieces, taking one that is not itself part of a mill where possible. You win by reducing your opponent to two pieces, so they can no longer form a mill, or by leaving them with no legal move. A common rule lets a player reduced to three pieces 'fly' a piece to any empty point.
In the placing phase, click any empty point to place a piece. In the moving phase, click one of your pieces and then an adjacent empty point to slide it. When you complete a mill, click an opponent's piece to remove it.
Mills are the currency of Nine Men's Morris, but the real skill is in creating threats that cannot all be stopped. These ideas will make you a tough opponent.
Grab the crossroads. The points where the most lines meet — the middle of each side, connecting the three squares — touch four other points each. Occupying these intersections gives your pieces the most mobility and the most ways to form mills, so contest them early in the placing phase.
Build a running mill. The most powerful weapon in the game is two mills that share a piece, arranged so that moving one piece back and forth breaks one mill and forms another every single turn. A running mill (or 'swing') lets you capture a piece every move — set one up and the game is usually won.
Create double threats when placing. During placement, aim to make two potential mills at once so your opponent cannot block both. Forcing them to defend one threat while you complete the other is how you win the opening phase.
Do not freeze your pieces. Three pieces locked in a completed mill are hard to reuse. It is often better to leave a gap you can close and reopen, keeping your pieces flexible, than to commit them to a static line that can no longer move.
Keep your pieces mobile. In the moving phase, a piece with no empty neighbour is dead weight, and being unable to move at all loses the game outright. Avoid clustering your pieces where they block each other, and try to leave your opponent short of squares instead.
Block and attack at once. The best defensive moves also build one of your own mills. When you must stop an enemy mill, look for the blocking point that simultaneously advances your own plan.
Against the computer, spend the placing phase fighting for the crossroads and setting up a swing; on the higher levels the AI defends single threats well, so victory usually comes from a double threat it cannot fully answer.
How do you win at Nine Men's Morris?
You win by reducing your opponent to two pieces, so they can no longer form a mill, or by leaving them with no legal move. You capture pieces by forming mills — rows of three along the board's lines.
What is a mill?
A mill is three of your pieces in a straight line along one of the board's marked lines. Each time you complete one you remove an opponent's piece, and repeatedly opening and reforming a mill is the fastest way to win.
What does 'flying' mean?
In a common rule, once a player is down to three pieces they may move a piece to any empty point on the board rather than only to an adjacent one, giving them a last chance to fight back.
Is this Nine Men's Morris game free?
Yes — play free in your browser against the computer, with no download and no sign-up.
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