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In how many ways can 9 cells of a6×6 grid be painted black such that no two black cells share a corner or an edge with each other?

In how many ways can 9 cells of a6×6 grid be painted black such that no two black cells share a corner or an edge with each other?
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In how many ways can 9 cells of a6×6 grid be painted black such that no two black cells share a corner or an edge with each other?

User BlinkingCahill
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1 Answer

1 vote

I'm not sure, so I won't answer it, in case you get it wrong

User Rebelshrug
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