How to play
- Place one queen in every row, every column and every colored region.
- Queens can’t touch each other, not even at a corner.
- Tap a square once for ×, twice for a queen. Drag to mark × on several squares.
Keyboard: arrows move, space cycles, q queen, x cross out, backspace clears, h hint, Ctrl+Z undo, Ctrl+Shift+Z redo.
Learn the logic behind itAbout unlimited Queens
Small boards are quick warm-ups. The 9×9 grids need the harder moves, like two regions that sit inside the same two rows. Your progress on the current puzzle is saved on this device, so you can close the tab and come back.