(;
AB[oq][mq][lq][qp][op][kp][qo][oo][lo][ln][pm][om][ml][ll][nk][pj][oj][nj][ri]
AW[qq][pq][rp][mp][ro][no][mo][nn][qm][nm][rl][pl][nl][ok][mk][mj][ni][mi][ph][rg]
C[Black plays.

Source:
    From Susuki Tamejiro 8P's tsumego book from 1920.];
B[ol]
C[Black's only chance to save the 5 side stones above is to cut off White's 6 center stones.];
W[pk];B[qj]
C[Black maximizes this group's liberties.];
W[on];B[pn]
(;
W[po]
C[White's most obvious try may be to squeeze these stones.];
B[pp];W[qn];B[po];W[nq]
C[This semeai is a one-way street.];
B[or];W[nr];B[qr];W[rq];B[ns]
C[A clever tesuji to take advantage of White's liberty shortage.];
W[ms];B[np];W[os];B[pr]
C[Black wins the semeai by one move.]
)
    (;
    W[nq]
    C[White's other try is to run out first.];
    B[po];W[nr];B[or];W[np];B[ql]
    C[But now Black can squeeze the side stones.];
    W[qk];B[rk];W[ql];B[rn];W[sk];B[rj]
    C[White cannot save the right side stones.];
    W[sm]
    C[For example ...];
    B[rm];W[sn];B[qn];W[sl];B[sj]
    )
)

