(;
AB[qo][qp][rp][sp][rq][rn][qm][pm][om][on][op][oo][oq][or][nr]
AW[sr][sq][rr][pr][ps][pq][pp][po][pn][qn]
C[Black plays.

Taken from a photo, in the AGA E-Journal Vol. 11, #13, 2010-03-22, of a go demo board in Myungwan Kim 9p's workshop.  This problem is a slight variant of a dan level problem from a Korean life and death collection.

Analysis:
    Myron Souris]
(;
B[os]
C[The only move!  The O2 stone is a red herring!  Sometimes forming an empty triangle is a good thing!]
(;
W[qq];B[qs];W[qr];B[rs]
C[Black destroys White's eye-space while staying ahead in the semeai.]
)
    (;
    W[rs];B[qr]
    C[White loses the semeai.]
    )
    (;
    W[so];B[qr];W[qs];B[rs]
    C[White falls to the classic double snapback.]
    )
)
    (;
    B[rs]
    C[Bad timing!];
    W[qq];B[os];W[so];B[ro];W[rm]
    C[White wins the semeai.]
    )
)

