(;
AB[qj][pm][pn][po][qp][rp][rq]
AW[oo][qo][np][pp][pq][jq][qq][rr]
TR[rr]
C[Black's response to the marked hane?]
(;
B[sr]
C[A greedy mistake.];
W[ro];B[qr];W[rs]
C[The classic "tombstone" formation.]
(;
B[qs];W[sp];B[ss];W[rr];B[rs];W[so];B[qn];W[sq]
C[Disaster for Black.]
)
    (;
    B[sq]
    C[No better.];
    W[so]
    C[And the reader can verify that White still wins the semeai.]
    )
)
    (;
    B[ro]
    C[Because of the previous line, Black must pull back, e.g., to here.  Now Black can aim at the hane at A.]
    LB[sr:A]
    )
)

