TsumegoFromGames39/Attempts

Black to live in lower right corner  

Klaus: I guess this sulution is right: once black has taken the key point , she cannot be killed.

another idea  

Klaus: this seems to work as well. I threatens to capture 2 stones at a which would not only saveguard black here, but threaten the base of the right side white group. However, white will answer at a and black still needs to come back to b in order to ensure live.