Could there be this alternative logic: except in the third column, there cannot be any black sides touching each other in adjacent cells (corners are allowed to touch but not sides), and in the third column all the black sides has to be connected, only option 1 satisfies this.
thorn
@thorn
star First Correct
1 month ago
6, # of sides touched/connected increases by 1 from L - R
Mazureqian
@mazureqian
2 weeks ago
The number of outside touches increases by 1 in every row and column. so its 6
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