Move the board up, down, left or right before placing your circle or cross. Win by lining up three matching marks vertically, horizontally or diagonally inside the board. Unlike ordinary tic-tac-toe, marks that end up outside the board do not disappear.
Play link and confirmed rules
Play the official free browser game. Published October 27, 2026, it has an estimated session length of three minutes and uses mouse clicks. Circles and crosses are placed alternately, but the board must be moved before placing a mark.
| Situation | Rule |
|---|---|
| Victory | Three matching marks in a line inside the board |
| Before placing | Slide up, down, left or right |
| Outside marks | Remain instead of being erased |
| Blocked slide | No empty cell in the destination direction |
Plan each turn
- Inspect both players' marks, including those outside the current board.
- Compare the four directions and imagine where your marks would be after moving.
- If there is no empty cell in the direction you want, that slide is unavailable.
- After sliding, check the open cells again and click the place that helps complete a line of three.
- If the other side has two marks aligned, check whether moving the board changes the threat before placing yours.
FAQ and mistakes
Why won't the board move? The destination needs an empty cell. Do off-board marks vanish? No. Does a line outside count? The published victory condition specifies inside the board. Is the center a guaranteed winning move? No such strategy has been verified for a moving board. Draw handling, board size, opponent control and a forced-win sequence are not established by the public instructions. The canvas could not be played through a text browser, so this is a rule-based approach, not a claimed personal victory.
Bottom line: plan the slide first and the placement second. Tic-tac-toe becomes trickier when the board itself goes for a walk.
Source: official game and instructions, checked October 27, 2026 (JST).
