Another rare Nikoli type. Paint some empty cells black. Black cells strictly form squares. Unpainted cells are orthogonally contiguous. Clue cells share side(s) with at least one painted square. If the clue contains a number, that is the total area of orthogonally adjacent black squares. (Rules, example here)
Quadruples Sudoku by Philip Newman
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(This post is part of the Genuinely Approachable Sudoku (GAS) series.) If
you’re feeling nostalgic for traipsing around the quad in college, you can
reli...
16 hours ago

2 comments:
Was always too lazy to look for English rules for these, but seems to be a fun puzzle type, and I thank you for the easy introduction to the type.
Nice puzzle type.
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