(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[White]PB[Black to play and rescue three stones]AW[nn][po][np][qp][lq][oq][pq][qq][mr][nr][rr][sr][rs]AB[qn][mo][qo][ro][mp][rp][mq][nq][rq][or][pr][qr]
(;B[op]C[This is double atari but...]
;W[pp]C[... White runs away]
(;B[oo]
;W[pn])
(;B[pn]
;W[oo]
(;B[on]
;W[no])
(;B[no]
;W[on])))
(;B[oo]C[This looks like a good point as it stops the bamboo joint connection for White.]
;W[pn]C[However White just pushes out and is not short of liberties.]
(;B[op]
;W[pp])
(;B[pp]
;W[op]
;B[no]
;W[pp]
;B[pm]
;W[on]))
(;B[no]C[If Black plays here White must not play the bamboo joint.]
(;W[oo]
;B[on]
;W[pn]
;B[op]C[Now White is short of liberties.])
(;W[pn]C[However White can just push out here and escape]
;B[pp]
;W[op]
;B[oo]
;W[pp]
;B[pm]
;W[on]))
(;B[pn]
(;W[oo]C[This time the bamboo joint is correct.]
;B[no]
;W[on]
;B[op]
;W[pp])
(;W[no]C[This is wrong for White because of shortage of liberties.]
;B[op]))
(;B[on]C[This is the correct answer - the only move that traps White.]
(;W[no]C[This leaves White short of liberties.]
;B[op]
;W[pp]
;B[oo])
(;W[oo]C[The bamboo joint also now leaves a liberty shortage.]
;B[no]
;W[pn]
;B[op])
(;W[pn]C[White can try to push but again Black captures.]
;B[pm]
;W[oo]
;B[no]
;W[om]
;B[op]C[White is again short of liberties.]
)))
