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 Bill Murphy
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(This post is part of the Genuinely Approachable Sudoku (GAS) series.)
Channel Tarzan as you enjoy swinging from thermo to thermo in this
thermometer jun...
3 hours ago