Stone on Stone

As you might have noticed by now, I love the various cell-shading puzzles. Today, we’re taking a look at another Nikoli creation – Stostone. In English, it’s generally known as Stone on Stone. Like Heyawake, you must shade cells according to the numbers in the regions, but there are a few unique requirements.

Today, we’re stacking rocks! Stone on Stone is a cell-shading puzzle, in which your goal is to find hidden blocks of contiguous cells.