Five in a row on a 15×15 board
Gomoku online
Play Gomoku online with a friend or against a bot. Five in a row on a 15×15 board — tic tac toe grown up, free and in your browser.
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Lethal Card · Every game against a person counts toward your Lethal Card — one ELO for every game.
The board is far too large to calculate, so Gomoku is played on threats instead: build two open threes at once and you have won, because your opponent can only answer one of them.
Players2 players
Game length5 minutes
How to play
- The board has 15×15 intersections. Players place stones on empty points.
- Player one moves first.
- The first player to line up five or more stones in any direction wins.
- A completely full board is a draw, though it almost never happens.
Strategy
- Play near existing stones. A stone far from the action is a wasted move.
- An open three is a threat, an open four is a win. Two open threes at once cannot be defended.
- Watch your opponent’s twos. A three must be blocked; a two can still be outraced.
- A run blocked at both ends is worth nothing at all.
Frequently asked
How is Gomoku different from Tic Tac Toe?
Tic Tac Toe is 3×3 with three in a row and always draws. Gomoku is 15×15 with five in a row, which makes it incomparably deeper.
Does Black have an advantage?
Yes — in free-style Gomoku the first player has a proven win. Tournament play uses Renju rules that forbid Black certain shapes.
What is an open four?
Four stones in a row with an empty point at both ends. Only one end can be blocked, so the other wins next move.
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