Sashigane

Game Rules: Sashigane

Divide the grid into L shapes one cell wide. A circle marks a bend, a number gives area, and an arrow points from an arm's end towards its bend.

Divide every cell into one-cell-wide L-shaped regions with two nonempty arms. A circle marks a bend; a number in it gives the whole region’s area. An empty circle does not fix the area. An arrow marks an arm’s endpoint and points toward the bend. Regions may have no clues; straight bars are not allowed. Tap an internal edge to add or erase a wall. Hold an edge to add or erase an optional X meaning no wall; drag to paint the chosen edge state. With a mouse, right-click instead of holding.