(;SZ[19]AW[ri]AW[rj]AW[sj]AW[rk]AW[sl]AW[rm]AW[rn]AW[sn]AW[ro]AW[qp]AW[rp]AW[lq]AW[mq]AW[nq]AW[pq]AW[or]AW[pr]AB[qh]AB[rh]AB[sh]AB[qi]AB[qj]AB[ql]AB[rl]AB[qm]AB[qn]AB[qo]AB[lp]AB[mp]AB[op]AB[pp]AB[qq]AB[rq]AB[qr]C[Black to get the best result.]GM[1]FF[4]CA[UTF-8]AP[CGoban:2]ST[2]RU[Japanese]KM[6.50]PW[Blanc]PB[Noir]
(;B[sp]
(;W[sr]C[White is very stubborn, show how Black wins.CHOICE]
(;B[sq]
(;W[qs];B[rs]TR[so]TR[sm]C[Correct, White can't approach.RIGHT])
(;W[rs]
(;B[so];W[qs]C[Don't be nice to White.])
(;B[qs]C[Correct, White can't approach.RIGHT]TR[so]TR[sm])))
(;B[qs];W[sq]C[Black loses the corner.])
(;B[rs];W[sq]
(;B[qk];W[ps];B[qs];W[so];B[si];W[ss];B[sk];W[rr]C[Black loses the corner.])
(;B[si];W[ps];B[qs];W[so];B[qk];W[ss];B[sk];W[rr]C[Black loses the corner.])
(;B[rr];W[so]C[Black loses the corner.]))
(;B[rr];W[qs];B[rs];W[sq]
(;B[ss];W[sq];B[ps];W[os];B[sr];W[qs]C[oops])
(;B[ps];W[so]C[oops])))
(;W[rs];B[qs];W[sr];B[sq]C[RIGHT]))
(;B[sq];W[sp]C[This is what happened in the real game ...];B[qk];W[sr]
(;B[si];W[qs]C[Black loses the corner, he can only eat the S10 group.])
(;B[qs];W[rs]C[Black loses the corner, he can only eat the S10 group.]))
(;B[sr];W[rs]
(;B[qs];W[sp];B[qk];W[ps];B[si];W[sq];B[sk];W[rr]C[Black loses the corner.])
(;B[sp];W[qs];B[qk];W[rr];B[sq];W[ps];B[si];W[ss];B[sk];W[so]C[Black loses the corner.]))
(;B[rs];W[sr]
(;B[sp];W[sq]
(;B[qk];W[ps];B[qs];W[so];B[si];W[ss];B[sk];W[rr]C[Black loses the corner.])
(;B[si];W[ps];B[qs];W[so];B[qk];W[ss];B[sk];W[rr]C[Black loses the corner.])
(;B[rr];W[so]C[Black loses the corner.]))
(;B[sq];W[sp];B[qk];W[ps]
(;B[si];W[qs];B[sk];W[rr]C[Black loses the corner.])
(;B[qs];W[rr];B[ss];W[rr];B[sr];W[rr]C[Black loses the corner.]))))
karmaGfa