(;
AB[mb][kc][lc][mc][pc][rc][nd][od]
AW[nb][ob][hc][ic][nc][jd][kd][ld][md]
C[White plays.

Source:
    Qi Jing Zhong Miao #337, an ancient collection of mostly kyu level life and death problems.
Analysis:
    Myron Souris]
(;
W[la]
(;
B[jb];W[jc]
(;
B[ma];W[kb]
)
    (;
    B[kb];W[ib];B[pb];W[ma];B[oc];W[ja];B[oa];W[na]
    )
)
    (;
    B[kb]
    (;
    W[ma]
    C[Correct.  Now White can atari from the left side.];
    B[jb];W[ib];B[pb];W[ja];B[oc];W[ka]
    )
        (;
        W[jb]
        C[Approaches from the wrong side.];
        B[ma];W[jc];B[pb];W[ka];B[oc]
        )
    )
    (;
    B[ma];W[kb]
    (;
    B[pb];W[jc]
    )
        (;
        B[jb];W[jc]
        )
    )
    (;
    B[pb];W[kb]
    )
)
    (;
    W[kb]
    C[Bad timing];
    B[jb]
    C[Black now has time to capture the White stone for an internal eye.]
    (;
    W[jc];B[ka];W[ma];B[lb];W[na];B[la];W[ia];B[ib];W[hb];B[pb];W[ha];B[oc]
    )
        (;
        W[la];B[lb];W[ma];B[ka];W[na];B[jc];W[ib];B[pb];W[ia];B[oc]
        )
    )
    (;
    W[jc]
    C[Fails];
    B[kb]
    (;
    W[jb];B[la]
    C[White loses the semeai because Black now has an internal eye.]
    )
        (;
        W[la];B[ma];W[jb];B[pb];W[ka];B[oc]
        C[With a shortage of liberties, White loses the semeai.]
        )
    )
)

