C4=5 check on move #9/13 would be too hasty, as Black could counter attack with E5+7!
Red’s penultimate move R6-4 in the last example is now not playable. However, there is still a brilliant way to penetrate the Black camp.
This routine takes advantage of the awkward position of the opponent King and puts the discovered check technique to full play.
Red can win in similar fashion as the last example. However, he must not get himself into trouble with the hasty H5+4 on the third move.