(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to kill]AW[rq][sq][nr][or][qr][ns]AB[op][pp][qp][rp][mq][nq][mr][ms]
(;B[rs]C[Playing on the inside does not stop two white eyes.]
;W[pr]
;B[qs]
;W[ps]
;B[sr]
;W[rr])
(;B[pr]C[Black must start here.]
;W[pq]
;B[ps]
;W[qs]
(;B[qq]
;W[os]
;B[pr]C[When Black plays 7 where 1 was played, White cannot secure the eye.])
(;B[oq]C[This play is wrong.]
;W[os]
;B[pr]
;W[qq]
;B[ps]
;W[or]C[After the capture of four white stones, White can play 10 "under the stones" to secure a second eye.])))
