(;
AB[do][eo][fo][cp][gp][cq][gq][cr][gr]
AW[cm][bn][co][bp][dp][ep][fp][bq][dr][fr]
C[Black plays

Source:
    Qi Jing Zhong Miao #345, an ancient collection of mostly kyu level life and death problems.

Analysis:
    Myron Souris]
(;
B[ds]
(;
W[er];B[fs];W[es];B[fq];W[cs];B[eq]
)
    (;
    W[es];B[dq]
    (;
    W[eq];B[fq]
    )
        (;
        W[er];B[fq]
        )
    )
    (;
    W[dq];B[fs]
    )
)
    (;
    B[er]
    C[Fails];
    W[dq]
    LB[eq:a][es:b]
    C[Correct.  If instead, White A or B, Black can connect!];
    B[ds];W[br];B[cs];W[bs];B[es];W[fs]
    )
    (;
    B[cs]
    C[Fails];
    W[br]
    (;
    B[ds];W[er];B[fs];W[es];B[fq];W[bs]
    )
        (;
        B[dq];W[er];B[fs];W[bs]
        )
    )
)

