A region-placement puzzle. Place exactly one star in every row, every column and every coloured region — and make sure no two stars ever touch, not even at a corner.
Rules
Click a cell once to place a star, again to mark it with a dot (ruled out), again to clear it.
Every row, every column and every coloured region needs exactly one star.
No two stars may be adjacent, including diagonally — a red star means it's clashing with another.
The puzzle is solved the instant every row, column and region holds exactly one star with no clashes.
Tips
Mark cells you've ruled out with a dot rather than leaving them blank — once a region, row or column has only one un-marked cell left, that's where its star has to go.