(;C[White to live on the side - the first move is the key.]SZ[19]AW[eo]AW[io]AW[jo]AW[ep]AW[fp]AW[gp]AW[eq]AW[hq]AW[iq]AW[jq]AW[er]AW[kr]AW[js]AB[fl]AB[fm]AB[im]AB[en]AB[fn]AB[kn]AB[co]AB[do]AB[go]AB[ho]AB[ko]AB[bp]AB[hp]AB[op]AB[bq]AB[dq]AB[gq]AB[kq]AB[mq]AB[oq]AB[br]AB[dr]AB[gr]AB[hr]AB[lr]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[0.00]
(;W[fs]
(;B[ir]C[CHOICE];W[jr];B[ip];W[jp]C[White wins the semeaiRIGHT])
(;B[gs]C[CHOICE]
(;W[ir];B[ls]
(;W[ks];B[is]C[Ko - white could have done better])
(;W[is];B[ks]C[White is dead])
(;W[hs]C[];B[ks]
(;W[jr];B[is]
(;W[fr]C[RIGHT])
(;W[fq]C[RIGHT]))
(;W[fr];B[jr]C[Ko. White does not need these complications.];W[fq];B[gr];W[kr]C[Ko - white could have done better])
(;W[fq];B[jr]C[Ko. White does not need these complications.];W[fr];B[gr];W[kr]C[Ko - white could have done better]))
(;W[fr];B[ks]
(;W[jr];B[hs]C[White is dead])
(;W[hs];B[jr];W[fq];B[gr];W[kr]C[Ko - white could have done better]))
(;W[fq];B[ks];W[hs];B[jr];W[fr];B[gr];W[kr]C[Ko - white could have done better]))
(;W[is]C[White wins he semeaiRIGHT])))
(;W[ir];B[fs]
(;W[es];B[hs]
(;W[is];B[dp];W[fr];B[ds]C[Ko for life - white could have done better])
(;W[fr];B[dp];W[gs];B[ds]
(;W[is];B[fs]C[Ko - white could have done better])
(;W[fq];B[fs]C[Ko - and to make it even worse Black takes first !])))
(;W[is];B[es]C[An easy kill for black]))
(;W[hs];B[gs]
(;W[es];B[ir];W[jr];B[is]C[Black wins the semeai])
(;W[ir];B[es];W[fs];B[fr];W[fq];B[is]C[Ko - white could have done better]))
(;W[gs];B[fs];W[fr];B[hs];W[es];B[ds]C[Ko - white could have done better])
(;W[es];B[hs]C[White wins]))