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Monday Mutant 10: Twincognito (domino)

Monday Mutants is a series in which I will attempt to experiment with "mutant" puzzles. These could be existing puzzle types with an unusual change in the rules, hybrids combining elements from multiple puzzle types, or puzzle types neither invented nor popularized by Nikoli.
In this Twincognito puzzle, instead of no two black cells being allowed to share an edge, every black cell must share an edge with EXACTLY ONE other black cell. The rules are otherwise unchanged.
Say, this puzzle looks familiar. . .

2 comments

Jonah said...

Nice! I'd been hoping for a one-grid, two-puzzles creation.

As for the mutant itself, from the description this sounded pretty brutal, but it wasn't so bad in practice. I also like how the new rules reduce how much one can "cheat" by using uniqueness.

Blaine said...

Nice construction. I'd printed this and the prior one out to solve at lunch. I thought I'd made a mistake and printed one twice. :)

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