hoshi911: Black to play.
It seems to me that there is an alternative correct solution (for one
branch) which is currently labeled as incorrect.
After the sequence
b N6, w N2, b N5, w L2, b M1, w L1 only b M4 is allowed. But if instead b K4, white is also dead due to similar reasons. A possible continuation after b K4 could be: w N1, b M4.
Ivan Detkov: I agree. After M1 all stones are dead. There are too many continuations after L1. One of the best is H3 for example. I decided to cut the sequence at M1.
Added the refutations