This tsumego was given in the Teaching Ladder room on KGS for fun. Nobody could figure it out, even amongst the single digit kyu players, so I worked on it for like an hour until I ‘think’ I got the answer. Move numbers 1-32 here are unimportant, I was only recreating the shape, the first move here starts with 33. Note that the O5 / N4 exchange, and the R7 / R8 exchange are both necessary responses for white- there’s no choice in the matter. I can’t see any response to black’s S8 afterward that doesn’t end in black being able to live. The various images I’ve posted here are examples of the sequences in which black lives based on where white #38 is played.

Of course even if this is the correct answer to the problem (and I’m 99% sure that it was, unless there’s something I’m just not seeing), it’s impossible for me to solve something like this in the middle of a game. It’s good reading practice though.