Queens Solver
Copy the colored regions from today's puzzle into the grid, tap Solve, and the crowns fall into place.
Grid size
Pick a color, then tap or drag over the cells
64 cells still need a color.
How to read the result
Copy the puzzle’s colored regions into the grid. The solver places one crown in every row, column and color region so that no two crowns touch — the same rules as the game.
Dragging a finger paints several cells at once. Pick the eraser to undo a cell.
How the solver thinks
It goes row by row, tries each column that is still free, skips any cell whose color already has a crown or that would touch the crown above, and backs up the moment a row has no legal cell left. On an 11×11 grid that is over before you lift your finger. It keeps going just long enough to check that there is no second solution.
The strategy works by hand too: look for a region that fits inside a single row or column. Its crown has to go there, which rules out that whole row or column for everyone else.
Questions people ask
What are the rules of Queens?
Place exactly one crown in every row, every column and every color region, so that no two crowns touch, not even at the corners. Each puzzle has exactly one solution.
Do I have to copy the whole grid?
Yes, every cell needs a color before the solver can run, because the regions are the whole puzzle. Pick a color, then drag across the cells; a full grid takes about a minute.
It says there's more than one solution. What went wrong?
A real Queens grid has exactly one, so a region is probably off by a cell. Compare the borders between regions with the puzzle, especially where a region snakes around a corner.
Does this connect to LinkedIn?
No. It never reads your account or the puzzle page. You copy the grid by hand and the solver works on your copy, right here in your browser.