Well, a Nurikabe variation actually. The two squares with crosses must be of different colours.
This is a punishing puzzle, with no pleasant path to solution. So, why publish? Because I can use it to win an argument with a friend.
Thermo-Sudoku by Philip Newman
-
(This post is part of the Genuinely Approachable Sudoku (GAS) series.) With
a new year comes the return of some frequent variations we love here at
GMPuz...
7 hours ago




