(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PB[Black to play]AW[hn][in][do][eo][fo][go][jo][lo][bp][cp][fp][jp][kp][fq][hq][lq][br][dr][fr][ir][lr]AB[cm][bo][co][ho][io][dp][ep][gp][ip][eq][gq][iq][jq][kq][er][gr][kr][fs]C[This is the problem position. Black to play.]
(;B[hr]C[If black tries this move it looks like two eyes..]
;W[dq]
;B[es]
;W[is]C[After this move black will lose part of the group]
;B[js]
;W[gs]
;B[hs]
;W[ds]
;B[hp]
;W[gs]C[Is there a better way to live?])
(;B[hs]C[The diagonal move is the shape move.
This is the correct answer.]
;W[hr]C[If white connects to try and make a dead shape...]
;B[js]C[... then black here makes a seki shape, so all the 
black stones aree alive]
;W[dq]
;B[es]
;W[ds]
;B[gs]C[If white tries to atari the left half he destroys the seki
and black lives with territory.]
(;W[hp]
;B[is]
;W[ls]
;B[jr])
(;W[is]
;B[hp]
;W[ls]
;B[jr])
(;W[ls]C[If white drops here...]
(;B[ks]C[.. then this connection is a mistake.]
;W[hp]C[White can now atari and black is short of liberties.])
(;B[is]C[This is the answer that keeps the seki. ]
;W[ks]C[This is just a dame point.]))))
