(;AB[rp]AB[sp]AB[qo]AB[po]AB[on]AB[nn]AB[mn]AB[ln]AB[lo]AB[lp]AW[so]AW[ro]AW[qn]AW[pn]AW[nm]AW[lm]AW[mm]AW[no]AW[rn]AB[mq]AB[mr]AB[nr]AB[ns]AW[kn]AW[ko]AW[kp]AW[lq]AW[lr]AW[ls]AW[ms]AW[kq]AB[om]AB[pm]AW[ol]AW[pl]AW[ql]AW[qm]AB[pq]AW[oo]TR[oo]C[Black to play effectively against the white cut]AP[goproblems]
(;B[mp];W[qp]
(;B[pp];W[qq]
(;B[rq];W[qr]
(;B[pr];W[rr])
(;B[rr];W[pr]
(;B[or];W[oq])
(;B[qs];W[oq])
(;B[oq];W[rs]C[]
(;B[qs];W[sr];B[ss];W[ps]
(;B[sq];W[rs]C[ko])
(;B[or];W[rs]))
(;B[sr]C[Had the opportunity arisen white's moves would have been used as ko threats.RIGHT])
(;B[or];W[sr]))
(;B[op];W[rs]
(;B[qs];W[sr];B[ss]C[ko])
(;B[sr]C[RIGHT])
(;B[or];W[sr]))
(;B[np];W[rs]
(;B[sr]C[RIGHT])
(;B[qs];W[sr];B[ss];W[ps]
(;B[or];W[rs])
(;B[sq];W[rs]C[ko]))
(;B[or];W[sr]))
(;B[nq];W[oq]))
(;B[qs];W[rr]))
(;B[sr];W[rr]
(;B[qr];W[rq])
(;B[sq];W[rq])
(;B[rs];W[sq];B[rq];W[sq]))
(;B[qr];W[rq]))
(;B[qq];W[pp]C[White gets more than expected]))
(;B[op];W[mp])
(;B[np];W[mp])
(;B[pp];W[mp])
(;B[qp];W[mp])
(;B[oq];W[mp])
(;B[qq];W[mp]))
