Gomoku
Take turns placing stones with the computer. The first to line up five in a row wins.

- Stones on board
- 0
- Wins (Medium)
- 0
Your move.
Click a point to place a stone, or move with the arrow keys and press Enter. Your win count is saved on this device.
How to use it
- Pick a level and whether you play black, who moves first, or white.
- Click an intersection to place a stone. On a touch screen, tap to move the marker and tap again or press Place stone.
- Make five in a row, across, down or diagonally, before the computer does.
Questions
What are the rules?
Black and white alternate turns on a 15 by 15 board. Five or more stones in an unbroken line win. There are no forbidden moves for black.
Why does black have an advantage?
Moving first is a real edge in Gomoku. Choosing white lets the computer open, which makes the game harder.
Can I take a move back?
Twice per game. Undo removes your last stone and the computer's reply. A game where you used undo is not counted in your win total.
How does the computer decide its move?
It wins at once if it can, blocks your four if it must, and otherwise searches a few moves ahead around the stones on the board. Easy mode only looks at the best few points.
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