Monday Mutant 7: Blackbarrier Jam (multiples of 3)

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 Blackbarrier Jam puzzle, only multiples of 3 are shown. Circles without a number represent a number that isn't a multiple of 3. The rules are otherwise unchanged.

Blog Archive