(;
AB[sr][rq][rp][qp][pq][oq][np][mp][mo][oo][on][om][ol]
AW[no][pp][op][po][qn][ql][pl][qq][qr][rr][ok]
PL[W]
C[White plays.

Source:
    "Tesuji", James Davies]
(;
W[qo]
C[Too slow.];
B[pr];W[rs];B[ps]
C[White loses the liberty race by a move.]
)
    (;
    W[or]
    C[White can gain a liberty with this tesuji.];
    B[nq];W[pr]
    C[After Black retreats, White can gain an extra liberty over Black's corner stones, but White ends in gote and ...];
    B[rm]
    C[... Black now gains a liberty himself!];
    W[qm];B[rn];W[qo];B[ro];W[rl];B[nr]
    C[Black wins the liberty race.  The reader can work out the details.]
    )
    (;
    W[nq]
    C[Correct tesuji.];
    B[nr];W[or]
    C[White sacrifices a stone in order to ...];
    B[mq];W[pr]
    C[... gain a liberty in sente.];
    B[nq];W[qo]
    C[Now White wins the liberty race by a move.]
    )
)

