analyzing number of lines in ? to deduce a line


analyzing number of lines in ? to deduce two crosses

Can't update post, the second image should be:

analyzing number of lines in ? to deduce two crosses

To me, one of the most important patterns in general has been this pattern. We're all familiar with it from square Slitherlink, and it works in all variants, too:



All yellow circles can be deduced. In general, this works any time a single line can only continue adjacent to a 1.