mekriff:
in the second resistance, the problem seems to freeze up with no result anytime the O1-wM2-Q1 combination gets played, even though it should be marked as correct

verebgabor:
After C18-E18-C17-D17 A18 should also work. If B19 then A17 and we have a three point nakade,if A17 then A16,and the 3 stones cannot be ataried from either side.

posetcay:
On the correct path, T3 at T2 also works.

posetcay:
C19-E19-C17-D17-A17-A18-B19-A16-F19 also works

Djab:
it seems that there is another variation : R2 P1 R3 and then the opponent can try to defend with Q3 (instead of S1). The killing move remains T3. If the opponent still tries to defend with T2, the answer is O1 (shortage of liberties) - Am I right ?

Shinkenjoe:
As the opponents answer at D19 is covered in the next problem, you could look at the e19 here.