QueensPlace one queen in every row, every column and every color.Step by step

Tap a cell once: it marks an X (no queen goes there).

Tap again: it becomes a queen. Once more: it clears.

Two queens can never touch, not even diagonally.

When every row, column and color has its queen, you win.

Tips

Start with the color that has the fewest cells.

Drag your finger to mark many X at once. With "Auto X", the X around each queen appear by themselves.

Every puzzle has a single solution, reachable without guessing.