I think it really depends on the size. Often the 5x5 feels like a breeze, but then 6x6 is a lot tougher. Probably there is some mathematical reason for this rel

I think it really depends on the size. Often the 5x5 feels like a breeze, but then 6x6 is a lot tougher. Probably there is some mathematical reason for this related to the divisibility of the grid side length.