click to fill in cells. option + click to mark squares pink.
numbers above correspond to columns, left to rows.
numerical value indicates contiguously shaded cells.
for example, '10' indicates a group of 10 shaded cells.
two or more values indicates groups of shaded cells.
for example, '3 3' indicates two groups of 3 shaded.
the amount of contiguous empty cells is not given.
therefore, consider all configurations for that value.
for example, '4 4' has three potential configurations.
one:[xxxx--xxxx], two:[-xxxx-xxxx], three:[xxxx-xxxx-].
logically, shaded cells overlap at points of certainty.
we deduce that the cells [-xxx--xxx-] must be shaded.
to solve, continue deducing until all values satisfied.