Yajikabe he combined Yajilin and Nurikabe puzzles. The goal is to blacken some cells of a grid according to the following rules:
Cells with numbers are always white.
No 2 x 2 cell area within the grid can contain all black cells.
All the black cells form one contiguous region.
A cell containing a number and an arrow represents how many black cells are in the row or column pointed at by the arrow.
Yajikabe he combined Yajilin and Nurikabe puzzles.