Queens

Place one piece in every row, every column and every colour region, with no two touching — diagonals included. Unlike chess queens they do not attack along whole lines, only the eight squares around them.

Yes. Unlimited deals a new board whenever you ask, at any size from 5×5 to 12×12 and one of four levels. Each board is generated in your browser and checked to have exactly one solution.

Every board here does. The generator grows each colour region outward from its cat and refuses any cell that would allow a second answer, and boards a solver cannot finish by logic alone are thrown away.

There are two. The Mini is a 6×6 at Steady; the Max is a 10×10 at Hard, and 12×12 on Sundays. Both come from your device's date, so everyone on the same day gets the same board, and solving either keeps your streak.

A hint never places a cat for you. It flags a cat in the wrong place, or highlights the next square that logic forces or rules out, and names the technique — “only one left”, “the squeeze”. Hints are unlimited but counted.

Only two layouts exist where four non-touching pieces sit one per row and column — too few to build fair puzzles. A 5×5 has fourteen, so the grids start at five.