(;AW[ro]AW[qp]AW[sp]AW[qq]AW[qr]AB[rl]AB[qn]AB[rn]AB[qo]AB[pp]AB[pq]AB[pr]C[basic position: black to kill in the best way]SZ[19]GM[1]FF[3]RU[Japanese]HA[0]KM[5.5]PW[White]PB[Black]GN[White (W) vs. Black (B)]DT[1999-07-28]SY[Cgoban 1.9.2]TM[30:00(5x1:00)]
(;B[qs];W[rs]
(;B[sr];W[sq];B[sn];W[rr]
(;B[rp]C[RIGHT])
(;B[so];W[rp]))
(;B[rr];W[sr]C[ko])
(;B[rq];W[rr]
(;B[sq];W[sr])
(;B[sr];W[sq])
(;B[sn];W[sq];B[so];W[rp])
(;B[rp];W[sq]))
(;B[sq];W[sr]
(;B[rq];W[rp])
(;B[sn];W[rq]))
(;B[sn];W[sr]
(;B[rq];W[rp])
(;B[so];W[rp])))
(;B[rr];W[rs]
(;B[sr];W[rq]
(;B[sn];W[so]
(;B[sq];W[ss])
(;B[ps];W[qs]))
(;B[ps];W[sq])
(;B[sq];W[ss]))
(;B[rq];W[sr];B[sn];W[rp]))
(;B[rs];W[qs]
(;B[rr];W[rq]
(;B[sn];W[sr];B[so];W[ss]C[ko])
(;B[sr];W[so]
(;B[sq];W[ss])
(;B[sn];W[sq])))
(;B[sr];W[rr]
(;B[ss];W[sq])
(;B[sq]))
(;B[sq];W[rr]
(;B[sn];W[rq]
(;B[so];W[rp])
(;B[sr];W[ss]))
(;B[sr];W[ss])
(;B[rq];W[sr]))
(;B[rq];W[rr]))
(;B[sq];W[sr]
(;B[rq];W[rr];B[qs];W[rs])
(;B[qs];W[rs]
(;B[rq];W[rp])
(;B[sn];W[rq]))
(;B[rr];W[rq])
(;B[rs];W[qs]
(;B[rq];W[rr])
(;B[rr];W[rq])))
(;B[sr];W[qs]
(;B[rr]C[white dead, but not the best kill: too many liberties inside];W[rq]
(;B[sn]C[RIGHT])
(;B[sq];W[rs]))
(;B[rq];W[rr];B[ss];W[sq])
(;B[rs];W[rr]
(;B[ss];W[sq])
(;B[sq];W[ss]))
(;B[sq];W[rr];B[ss];W[rq];B[sn];W[rs];B[so];W[sr]C[ko])
(;B[sn];W[rr]
(;B[sq];W[rq];B[so];W[ss])
(;B[rq];W[sq])
(;B[ss];W[rp];B[sq]C[dead, but not the best way, because white has more liberties than other ways of killing white, and this can make a difference depending upon the outside.])
(;B[rp];W[rq]
(;B[so];W[ss])
(;B[ss];W[so])))
(;B[rp];W[rq];B[sn];W[rr]
(;B[so];W[ss])
(;B[ss];W[so])))
(;B[rq];W[rr]
(;B[qs];W[rs]
(;B[sq];W[sr])
(;B[sr];W[sq])
(;B[sn];W[sq];B[so];W[rp])
(;B[rp];W[sq]))
(;B[sq];W[sr];B[qs];W[rs])
(;B[sr];W[sq];B[qs];W[ss])))
adum