Queens
HomeOne queen per row, column and color. Queens cannot touch, even at corners.
One queen per row, column and color. Queens cannot touch, even at corners.
Standalone Queens shows the colored regions from the start. Place one queen in each row, column and region without neighboring queens, including corner contact.
A queen at row 1, column 1 rules out row 2, column 2 because the two squares touch at a corner. Row 3, column 3 is farther away and is not ruled out by that queen’s touching rule alone. It still has to satisfy its own row, column and colored-region constraints. The diagram shows only this distance rule, not a solved board.
The bank includes 10,010 puzzles at 9×9, ten at 16×16, and one at 32×32. The 32×32 puzzle has nine starting queens and 23 to place. Hints are optional unranked practice.
Every outlined colored region needs exactly one queen, as does every row and column. If all remaining candidates in one region lie in the same row, its queen must use that row, so other regions cannot put a queen there. Look for a region or row with only one available square after applying all constraints.
No. These are colored-region logic puzzles. Queens cannot share a row, column or region and cannot touch, even diagonally. Unlike chess N-Queens, a long diagonal is allowed when the queens are not adjacent.
X is your own note that a square is excluded, not an automatic proof. Click once for X, again for a queen, and again to clear your entry. A red queen conflicts with another queen or a fixed clue under a row, column, region or touching rule. You can correct it without restarting; fixed gold clues cannot be removed.