(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to play]AW[dp][ep][fp][gp][bq][dq][gq][cr][dr][er][gr][hs]AB[co][do][eo][fo][go][cp][hp][cq][hq][br][hr][ir][cs][ds][is]C[This is the problem position.
Black to play.]
(;B[gs]C[Trying to take the eyes away is not fast enough.]
;W[ar]
;B[bs]
;W[es]C[Black gets captured in the corner.])
(;B[fs]
;W[ar]
;B[bs]
;W[es]C[Still not fast enough])
(;B[bs]C[This looks a good defence for black.]
;W[es]
;B[aq]
;W[gs]C[But white has time to make 2 eyes and live.])
(;B[aq]C[This seems too slow.]
;W[es]
;B[gs]
;W[bs]
;B[bp]
;W[cs]C[White gets two eyes.])
(;B[as]C[Playing the 1-1 is the correct move.]
(;W[es]
;B[gs]
;W[bs]
;B[cs]C[White now cannot capture the corner]
(;W[fs]
;B[fq]C[And can only make one eye on the side.])
(;W[ds]
;B[bp]
;W[bs]
;B[aq]
;W[ar]
;B[bq]C[The corner is full of false eyes.]))
(;W[fq]
;B[fs]
;W[es]
;B[gs]
;W[bs]
;B[cs])
(;W[gs]
;B[fq]
;W[es]
;B[fr]
;W[bs]
;B[cs])))
