Place exactly seven radiant crosses on the 7x7 board.

• Each row must contain exactly one cross.
• Each column must contain exactly one cross.
• Each colored region must contain exactly one cross.
• Crosses cannot touch horizontally, vertically, or diagonally.

Controls: Single click or tap a square to mark it with an X. Double click or double tap to place a radiant cross. When you place a cross, the game automatically marks nearby impossible squares with X.