(;
AB[ia][nb][qb][rb][kc][nc][id][jd][nd][rd][ke][le][me][qe][jf][nf][of][oa][na]
AW[ha][gb][ib][ob][gc][ic][jc][lc][oc][pc][qc][hd][kd][ld][md][od][ne][oe][pa][pb]
C[Black plays.

Source:
Based on problem #350 from Qi Jing Zhong Miao, an ancient collection of mostly kyu level life and death problems.

Analysis:
    Myron Souris]
(;
B[lb]
C[Squeezing White might seem like a good idea, ...];
W[kb];B[mc];W[kc];B[ma];W[ka]
C[... but Black quickly runs out of steam.  White captures Black's stones.]
)
    (;
    B[kb]
    C[The only move that doesn't quickly lead to a Black collapse.];
    W[lb]
    (;
    B[la]
    C[Another natural looking move ... that fails!];
    W[ka]
    C[White has this unpleasant throw-in.];
    B[ja];W[jb]
    C[And White wins the semeai.]
    )
        (;
        B[ka]
        C[A counter-intuitive move that saves Black!]
        (;
        W[la]
        C[White seems to be OK, but ...];
        B[rc]
        C[... in an almost comical situation, White must first capture the 3 stones on the left, before filling up the liberties of the 5 stones on the right.

But Black is ahead of this semeai by one move!];
        W[jb]
        C[For example ...];
        B[qd];W[ja];B[qa]
        C[... Black wins the semeai.]
        )
            (;
            W[ja]
            C[Also fails.];
            B[la];W[jb];B[ma]
            C[Now with this temporary "seki", White is helpless against Black filling up the remaining liberties of the White group to the right.]
            )
        )
    )
)

