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In this guide

• How to play Nine Men's Morris
• The three phases of the game
• The mill rules, line by line
• The three AI levels
• Strategy that wins games
• The Daily Challenge
• Questions and answers

How to play Nine Men's Morris

Press Play and the board is live. You play the purple pieces, and purple always moves first. In the first part of the game you simply place one piece per turn on any empty point of the board. There is no confirm step and nothing to drag. One tap places the piece, and the AI answers at once. The gold dot marks the newest piece, so you can always see what just changed.

Your goal is to build a mill. A mill is three of your pieces in one unbroken line along the printed lines of the board. The moment you complete a mill, the enemy pieces that can be taken glow with a red ring. Tap one and it leaves the board for good. Then the turn passes, and play goes on. Every mill you make costs your rival a piece, and pieces never come back.

You win in one of two ways. Reduce your rival to just two pieces on the board, and the game ends at once. Or close every path so tightly that your rival has pieces left but no legal move. That second win is the quiet one, and it is deeply satisfying. It rewards players who think about space, not just captures. The score runs across games, so a rematch is always one tap away with the Play again button.

Made a mistake? On the Casual and Club levels the Undo button takes back a full round, your last move and the AI reply together. On Master there is no Undo, because every move there is final. The New game button starts a fresh board with the same settings, and Resign hands the current game to the other side when a position is truly lost. In two-player mode both sides tap the same board in turn, and Undo takes back one move at a time.

The three phases of the game

Nine Men's Morris is really three small games in a trench coat. Each phase rewards a different kind of thinking, and strong players plan for the next phase while they are still in the current one. The phase line above the board always tells you which phase the side to move is in.

Phase	What you do	What matters most
1. Placing	Put one piece per turn on any empty point, nine pieces each.	Claim the strong points and set up future mills.
2. Sliding	Move one piece per turn along a line to a neighbouring empty point.	Open and close mills, and squeeze the rival's space.
3. Flying	With only three pieces left, a piece may fly to any empty point.	Speed and surprise. A flying side is weak but very hard to trap.

The placing phase is a land grab. Sixteen of the twenty-four points sit on two possible mill lines, and the four middle points of the outer and inner squares sit on three. Pieces placed early shape every slide that comes later, so do not scatter them at random. Try to build shapes that are one move away from a mill in two different places at once. Your rival can block one threat, but not both.

The sliding phase is the long middle battle. Pieces creep along the lines, mills open and close, and the board slowly empties. This is where the famous mill shuttle appears. If one of your pieces can slide out of a mill and straight back in on the next turn, you own a machine that takes an enemy piece every second turn. Guard your own open mills, break the rival's shuttle the moment you spot it, and watch the edges of the board, where pieces get trapped first.

Flying changes everything. A side down to three pieces looks beaten, but those pieces can now land anywhere. Mills appear out of thin air, blocks stop working, and many "won" positions are thrown away by careless players at exactly this stage. If you are the stronger side, keep your pieces connected and cover the obvious landing points. If you are the flying side, be patient, keep all three pieces far apart, and strike only when a mill is guaranteed.

The mill rules, line by line

A mill is three pieces of one colour in an unbroken row along a printed line. The board holds sixteen possible mills: four on each of the three squares, and four along the straight lines that join the squares at their middle points. Diagonals do not count. There are no diagonal lines printed on a Morris board, so three pieces that merely look lined up on a slant are worth nothing.

Completing a mill lets you remove exactly one enemy piece from the board. You choose which one. The natural targets are pieces that are one step away from completing an enemy mill, pieces holding a key point, and pieces your rival needs for their sliding plans. A mill that is broken and then closed again on a later turn counts as a new mill and takes a new piece. That is the rule that makes the sliding shuttle so powerful.

One protection rule keeps the game fair. A piece that sits inside a completed enemy mill cannot be taken. It is safe while the mill stands. There is exactly one exception, and it matters in the endgame: if every piece your rival has left sits inside a mill, then all of them can be taken. The game shows you the legal targets with a red ring, so you never have to guess. If a piece does not glow, it cannot be removed.

Two more rules complete the picture. First, you may not jump over pieces or slide through them; a sliding piece moves to a directly neighbouring empty point, no further. Second, the game never ends in a forced draw here. Play continues until one side has two pieces or no legal move, and the trapped-player rule means a completely blocked side loses even with plenty of pieces on the board. Space is a weapon. Use it.

The three AI levels

One board, three very different opponents. All three play by the same rules and see the same board. The difference is how far ahead each one thinks, and how much mercy each one shows. Start at the bottom, learn the shapes of the game, and climb.

Level	How it plays	Undo	Best for
Casual	Honest moves with cheerful lapses. It takes free mills and easy captures, then daydreams.	Yes	First games and learning the phases.
Club	Spots every mill at once, blocks the point your mill needs, and judges each move on the whole board.	Yes	A real game against a thinking rival.
Master	Searches several moves ahead, weighs mills, threats, space and material together, and punishes loose play.	No	Players who want the full classic battle.

The jump from Club to Master is the honest one. Club reacts to the board in front of it. Master plays the board three turns from now. It will give up a small point today to complete a trap next turn, and it is very hard to surprise with a double threat, because spotting two threats at once is exactly what its search is for. Beating Master for the first time is a genuine milestone, and the game keeps your win streak so you can prove it was not luck.

Strategy that wins games

Build double threats. The strongest shapes in Morris threaten two mills at the same time. A piece placed at a crossing point, where two lines meet, often does this on its own. Your rival gets one move to block, and one move can only cover one point. Even when a double threat gets blocked, the piece you forced them to spend on defence is a piece that is not attacking you. Threats win games even when they never land.

Take the strong points early. Not all points are equal. The four points where the joining lines meet the middle square touch four mill lines each when you count both directions of travel, and the corners control the edges of the board. In the placing phase, claim crossing points first, keep your pieces connected to each other, and avoid filling a point that your own future mill needs to stay empty. A surprising number of games are lost by blocking your own best line.

Learn the shuttle. When one of your pieces sits next to a mill it belongs to, with an empty point beside it, you can slide it out and back in forever. Each return trip closes the mill again and takes another enemy piece. It is the closest thing Morris has to a winning machine. Building one should be your main plan in the sliding phase, and destroying the rival's shuttle, by capture or by blocking its empty point, should be yours the moment you see one forming.

Count the endgame before it starts. Every capture moves the game toward flying. Ask who benefits. If your rival reaches three pieces while you still hold six, their flying pieces will dodge your blocks and hunt for cheap mills. Sometimes the right capture is not the flashy one; sometimes you should refuse a mill line entirely and keep the board crowded, where your extra pieces control the space. The blocked-player rule means a crowded board is a slow trap for the side with fewer safe points.

The Daily Challenge

Every day, the Daily Challenge deals one fresh tactical position, the same for every player on that day. Each position is an original one-move puzzle from our own collection. Some ask you to complete a mill with a single slide. Some hand you three flying pieces and one perfect landing point. Two of them let you win the whole game in a single turn, if you find the mill and take the right piece. There is exactly one job: make the move that finishes the challenge.

Play a wrong turn and nothing is lost. The position simply resets, and you try again with what you learned. Solve it and the day joins your Daily streak, which the game shows on the menu. Miss a day and the streak starts again, so the challenge rewards a small daily habit rather than one long session. After a solve, the Play it out button deals the same position as a full game against the Club AI, with the AI to move, so you can explore how the game continues from the puzzle's final shape.

Questions and answers

Is Nine Men's Morris free to play here?

Yes. This Nine Men's Morris game is completely free to play in your browser. There is no download, no sign-up and no limit on games. Your scores, streaks and any game in progress are saved on your own device only.

How do you win a game of Nine Men's Morris?

You win in two ways. Take enemy pieces until your rival has only two left on the board, or trap your rival so they have pieces but no legal move. Both wins come from mills, the lines of three that let you remove one enemy piece each time you complete one.

What is a mill, and what does it do?

A mill is three of your pieces in one unbroken line along the printed lines of the board. Completing a mill lets you remove one enemy piece of your choice from the board. A mill that is opened and closed again on a later turn counts again and takes another piece.

Can you take a piece out of a mill?

Normally no. A piece inside a completed mill is protected and cannot be removed. The one exception is when every piece your rival has left sits inside a mill. In that case all of those pieces can be taken. The game rings every legal target in red, so the rule is always clear on screen.

What does flying mean in Nine Men's Morris?

Flying is the last phase of the game. When a side is down to exactly three pieces, those pieces no longer slide step by step. They may fly to any empty point on the board. Flying makes a weak side very hard to trap, and it is why a three-piece side can still win.

Can two people play on this page?

Yes. Choose 2 Players on the menu and both sides are played by hand on the same device, purple first and gold second. The match score keeps running between games, and Undo takes back one move at a time so a mis-tap never has to stand.

Last updated: November 8, 2026