jomapil wrote:
Yes. It is my conviction that one of the two cages is wrong. But my doubt is that situation is always incorrect because it would take at two solutions, isn't it?
It is in fact the case that as soon as you see a "double pair" like that,
you know they can't both be there. Often that is a useful clue.
(let's say you have cages 2- and 10+ in a 6x6 (side by side),
so for the 10+ you have 6,4, and say for the 2- you have 6,4 and 5,3 as candidates,
then you'd know the 2- has to have 5,3)