Puzzle

1. Put exactly one queen in every row, every column and every colour region.
2. Tap a cell once for a ✕ (a cell you have ruled out), tap again for a queen.
3. Two queens may never touch — not even diagonally.

Mouse click cycles empty → cross → queen, right-click (or ctrl-click) cycles the other way, drag to paint crosses. Keyboard arrows move, Space cycles, X cross, Q queen, Del erase, H hint, C check, R clear, Ctrl+Z undo. Outside the board: N/P next and previous, T today, D theme.

Every board here is generated offline and machine-checked to have exactly one solution, so a puzzle can always be finished with logic alone — guessing is never required. Region sizes vary on purpose: the only promise the clues make is one queen per row, column and region.