Coronet

Coronet is a logic puzzle game. The grid is divided into colored regions; place exactly one crown in every row, every column, and every colored region, with no two crowns touching, not even diagonally.

Left-click a cell to place or remove a crown, drag a crown to move it, right-click (or long-press on touch) to mark a cell you've deduced can't hold one. Crowns that break a rule are outlined in red.