How to Play Nine Men's Morris
Nine Men's Morris is a medieval strategy game played on a board of 24 points arranged in three concentric squares. The game has three phases. First, players alternate placing their nine men on empty points. Once all men are placed, players move a man each turn to an adjacent empty point along a board line. When a player is reduced to exactly three men, those men may fly to any empty point on the board.
Whenever you line up three of your own men along a marked line, you form a mill and immediately remove one opponent man of your choice - though men sitting inside an opponent's mill are safe unless nothing else is available. You win by reducing your opponent below three men or by blocking every move they have. On PlayVersusAI you play the white men against a dark-pieced AI, or challenge a friend in real-time multiplayer.
Strategy Tips
- Take the crossroads first - the four points where the middle square meets the connector lines each touch four neighbors. Controlling them gives you the most moves later and chokes your opponent's mobility.
- Placement decides the game - most games are won or lost before the moving phase begins. Place men to build two mill threats at once, forcing your opponent to leave one open.
- Build a swinging mill - two adjacent mills sharing a movable man let you break and re-form a mill every turn, removing an enemy man each time. It is the most powerful structure in the game.
- Don't rush your first mill - an early mill feels good, but spending placements on one line often concedes board control. Position beats a single capture.
- Block by counting moves - before every move, check which points would complete an opponent mill next turn and make sure you occupy or cover the critical one.
- Use flying aggressively - at three men you can land anywhere, so threaten mills on opposite sides of the board and force awkward defensive shuffles.
Read the full Nine Men's Morris guide →
Playing Nine Men's Morris on PlayVersusAI
A medieval board game played in three distinct phases. First, both players place their nine pieces one at a time onto the board's 24 points. Then they slide pieces along the marked lines to adjacent empty points. Finally, once a player is down to three pieces, those pieces may "fly" to any empty point on the board.
Throughout all three phases the goal is the mill: three of your pieces in a row along a marked line. Forming one lets you remove an opposing piece from the board. The subtlety that catches people out is the "running mill" — a configuration where sliding one piece out of a mill and back again re-forms it every other turn, removing one of your pieces each time. The AI builds these deliberately.
What's on This Page
- Four difficulty levels — switch between Easy, Medium, Hard and AI Training at any time, including mid-game.
- Online multiplayer — play a friend in real time using a private room code, or take on a stranger from the public lobby.
- Tracked results — wins count toward your profile statistics and the site leaderboard.
- No account required — the full game is playable as a guest, on desktop, tablet or phone.
Easy forms mills when they are obvious and misses running-mill setups. Medium blocks your mills reliably. Hard builds double configurations where blocking one mill allows another. AI Training plans the placement phase around the mobility it will need later, which is where most games are actually decided.
Mistakes That Lose Games
- Placing pieces only to form mills. The placement phase decides how much room you have to move later. A board full of your own pieces with nowhere to slide is a lost game.
- Ignoring a near-mill because you are building your own. Removal is powerful enough that letting a mill form to gain tempo rarely pays.
- Failing to spot a running mill. If your opponent can open and close the same mill repeatedly, you lose a piece every other turn and must break the pattern immediately.
- Removing the wrong piece. When you take a piece off, take the one that unblocks your own plans or breaks up their structure, not just whichever is easiest to reach.
Nine Men's Morris Questions
What does "flying" mean?
When a player is reduced to exactly three pieces, those pieces may move to any vacant point rather than only to adjacent ones. It is a comeback mechanic that makes a three-piece position much harder to finish off than it looks.
Can I remove a piece that is part of a mill?
Only if no other pieces are available. The standard rule protects pieces inside mills until every piece outside a mill has already been taken.
What happens if a player cannot move?
A player with no legal move loses. Locking your opponent in place is a legitimate and sometimes the fastest route to victory, which is why mobility matters as much as material.
For the complete rules, the deeper strategy and the history of the game, read the full Nine Men's Morris guide, or browse guides for all 20 games.