Gomoku Unblocked

Gomoku is what happens when you take the simple idea of “get a line” and give it a big enough board to become serious. Players drop stones where the lines of a 15x15 grid cross, nothing ever moves or gets captured, and the first unbroken line of five wins. Because the board keeps getting fuller, every stone you place either builds toward something or quietly blocks your opponent. This unblocked version from Christopher Müller’s PaperGames collection plays freestyle rules against a three-level computer or a friend on one screen.

Placing Stones and Making Five

Black goes first, then the turns alternate. On your turn, choose any empty intersection and place one stone there. From then on it never moves.

You are after a straight run of at least five stones in your color. It can run horizontally, vertically or along either diagonal. The moment someone completes such a line, the game ends. If the whole board fills without one, it is a draw, though in practice that is rare.

Against the computer, take black for the first move or white to answer, then set the level to Easy, Medium or Hard. Undo removes your most recent stone and the computer’s answer to it.

Gomoku controls

To do this	Keyboard	Mouse	Touch
Put a stone on the board	Arrow keys to move between points, Enter to place	Click an empty intersection	Tap an empty intersection
Play a friend on this device	—	Click "2 Player (local)"	Tap "2 Player (local)"
Set up a computer game	—	Click "vs Computer", pick a color and level, then click "New game"	Tap "vs Computer", pick a color and level, then tap "New game"
Remove your last stone	—	Click "Undo"	Tap "Undo"
Give up this game	—	Click "Resign"	Tap "Resign"

The Language of Threats

Strong Gomoku players think in patterns, and learning a few names makes the game much clearer.

Open three. Three of your stones in a row with empty points at both ends. If ignored, it becomes an open four.

Open four. Four in a row with both ends empty. This cannot be stopped, since your opponent can only block one end.

Closed four. Four in a row with one end blocked. It still threatens to win and must be answered right away.

With those in mind, the main plan becomes clear:

1. Start near the center, where a line can stretch out any way it likes.
2. Block any open three your opponent makes immediately, before it turns into an open four.
3. Look for a single stone that creates two threats at once, for example a pair of open threes, or a four together with an open three. That is usually the winning move.
4. Use broken shapes like stone, stone, gap, stone. They are harder to notice and still grow into five.
5. Count the open ends of every line, not only the stones in it. A blocked four can be weaker than an open three.

When Gomoku Is the Right Pick

Gomoku suits players who like clear rules and sharp tactics. A game against the computer usually takes a few minutes, and the Hard level is strong enough to punish a missed open three. Options for larger text, stronger contrast, extra spacing and a slower or faster computer help on small screens.

If you enjoy stone games, Go shares the same kind of grid but asks you to surround territory instead of making lines. For a quicker cousin with gravity, try Four in a Row.