(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to play and kill]
AW[po][ro][op][pp][qp][pr][rr]AB[nn][pn][qn][rn][oo][qo][np][oq][mr][or]
(;B[qq]C[This looks like a key point in White's shape.]
;W[pq]
;B[ps]
;W[qr]C[However White easily makes eye shape.])
(;B[pq]C[Pushing through looks good.]
;W[qq]
;B[ps]
;W[qs]C[However White can make a ko shape.])
(;B[ps]C[Simply playing the hane first is the killing move.]
(;W[qs]
;B[qq]C[Then this is a tesuji.]
;W[pq]
;B[rp]C[White's eyes disappear.])
(;W[qr]
;B[pq]C[If White plays this way this is the follow up.]
;W[rp]
;B[qq]
;W[rq]
;B[qs]
;W[rs]
;B[so]C[There is only room for one eye.])
(;W[rq]
;B[pq]C[Still only one eye.])
(;W[so]
;B[qq]C[White still cannot make two eyes.])))
