(;GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[White]PB[Black]AW[mn][lo][no][lp][mp][np][op][jq][kq][pq][jr][mr][pr][js]AB[kl][lm][nm][kn][nn][pn][ip][jp][kp][pp][qp][iq][nq][oq][qq][ir][or][qr][is][ks]C[White to live.]PL[W]
(;W[nr]CR[nr]C[correct.]
(;B[kr]CR[kr]
;W[lq]CR[lq]
;B[ln]CR[ln]
;W[ns]CR[ns]
;B[ps]CR[ps]C[Black needs to take since white can link back with a move at Q1.]
;W[ls]LB[ln:4][lq:3][kr:2][nr:1][ls:7][ns:5][ps:6]C[White has two eyes.])
(;B[ps]CR[ps]C[variation.]
;W[lq]CR[lq]
;B[ln]CR[ln]
;W[ls]CR[ls]LB[kr:A][ns:B]C[White can get two eyes by playing at A or B next.]))
(;W[mq]CR[mq]C[not good.]
;B[kr]CR[kr]
;W[lq]CR[lq]
;B[ln]CR[ln]
;W[nr]CR[nr]
;B[ps]CR[ps]C[White can not make two eyes.])
(;W[lq]CR[lq]C[not good.]
;B[ln]CR[ln]
;W[nr]CR[nr]
;B[ns]CR[ns]C[can not make two eyes.])
(;W[lr]CR[lr]C[not good.]
;B[mq]CR[mq]
;W[lq]CR[lq]
;B[ln]CR[ln]
;W[ns]CR[ns]
;B[ps]CR[ps]LB[nr:A][ls:B]C[White needs both A and B to live.])
(;W[ns]CR[ns]C[not good.]
;B[lq]CR[lq]
;W[mq]CR[mq]
;B[kr]CR[kr]
;W[ps]CR[ps]
;B[qs]CR[qs]
;W[os]CR[os]
;B[ln]CR[ln]C[White only has one eye.]))