TheAppealOfTesujisVolume2/Attempts

Problem 1, White to play, one star  

at 1, taking ko first.

Problem 49, Black to play, three stars  

The key point. W cannot connect at a due to damezumari. If b, c catches W in connect-and-die. If c, B b; W e; B d, W above e, B a.

Problem 100, Black to play, two stars  

If at either 'a', B at the other. Not exactly miai because of the other interesting local possibilities. I'm pretty sure this works though.