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by jws 4140 days ago
Ojoo!

25638 phone. I'm slightly saddened that 0hh1 only includes some of the possible deductions. I generally play 8x8 and I've not found a case where a RBR----R type of row requires a deduction about where the R can not be because it would match an existing row. These come up where you have three unknowns in a row, but I think never for four.