How to play
Fill every open cell with a circle (maru) or a cross (peke).
- Three of the same mark may never sit in a line: across, down or diagonally.
- Black cells are blocked. They hold no mark and break up a line.
- Marks already shown are fixed and cannot be changed.
Controls
- Tap a cell to cycle: empty → circle → cross → empty.
- Drag to paint a run of cells at once.
- Red marks three alike in a line.
- Hint points at a cell you can deduce and says why; press it again to clear it.
- Solution shows the answer over your marks; the board is locked until you press it again.
- The + button makes a new board.
- The title opens a menu of the other puzzles.