Here’s a Heyawake. I used to hate Heyawake, but after making the first one (doubled with TLSI) I quite like them now.
(click for full-sized image)
- A region’s clue tells exactly how many shaded cells it contains. Unclued regions may have any number of shaded cells (including zero).
- Two shaded cells may not share an edge.
- The unshaded cells must form a single, continuous polyomino.
- No continuous line of unshaded cells may pass over two or more region borders.