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Oases (167)
Other names: Oasis
Instruction:
Blacken some cells (leaving the other cells white) so that the unshaded cells are all connected along edges. Blackened cells cannot touch each other along edges. Cells with circles cannot be blackened. No 2×2 group of cells can be entirely unshaded. Each circled number represents the number of other circles that can be reached from that circle by only going (along edges) through empty (unshaded and uncircled) cells. (A circle that can be reached by more than one path still only counts as one circle for counting purposes.)