From WPC unofficial wiki


Oasis Example.png Oasis Example Solution.png

Shade some cells in the grid. Shaded cells cannot touch each other orthogonally. All unshaded cells must be orthogonally interconnected. Unshaded cells cannot form a 2x2 square. Cells with circles cannot be shaded.

A number indicates how many other numbers or circles can be reached from that cell by passing only orthogonally through empty unshaded cells (it cannot pass through a shaded cell nor a cell with a number/circle).

(Rules and example from WPC 2016 IB)

History of the puzzle[edit]

First appeared on WPC 2016/Round 11, an "innovative" round. The author of the puzzle was Matej Uher (Slovakia).

Appearances in the past WPCs[edit]