(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[NZ]SZ[19]KM[7.00]TM[1800]OT[5x30 byo-yomi]DT[2013-06-09]PC[The KGS Go Server at http://www.gokgs.com/];B[dp];W[pd];B[dc];W[pq];B[po];W[pl];B[mp];W[oo];B[on];W[no];B[pp];W[nq](;B[nn];W[mo];B[qq];W[pr](;B[rp];W[iq];B[di](;W[qm]C[bad exchange for white who would like to play the keima instead later];B[qn];W[pi]C[white shoud extend directly (without the kosumi)])(;W[qn];B[pn];W[qm]C[black is not alive yet](;B[qo];W[rr])(;B[qr];W[ro])(;B[rr];W[qo];B[qp];W[sq])))(;B[qr];W[pn];B[pm];W[qn];B[qm];W[ro];B[rp];W[rm];B[ql];W[rl];B[qk];W[rk];B[qj];W[ri]LB[mo:A]C[black has an influence but because of the forcing move, white has an annoying stone at A.]))(;B[qq](;W[oq];B[nn];W[pn]C[white does not need to push now];B[pm];W[qn];B[qm];W[ro];B[rp];W[rm];B[ql];W[rl];B[qk];W[rk];B[qj];W[ri];B[mo](;W[lr];B[rr])(;W[rr]C[if white wants to kill the corner](;B[qr];W[lr])(;B[mq]C[black would enclose him and his influence would be efficient];W[qr];B[nr];W[or];B[np];W[op];B[os];W[pr];B[qi])))(;W[pr](;B[qn];W[qr];B[rq];W[jp]LB[jq:A]C[A is also possible];B[rl]LB[nn:A][mo:B]C[black is alive and does not need to push at A. maybe later, black can play B.])(;B[nn]C[useless now];W[mo];B[qn]LB[rp:C][oq:B][pr:A]C[in this case white haven't played B (slower than A). prevent the cut is better than the small corner];W[qr];B[rq];W[jq];AE[nn][mo];B[rl]LB[nn:A][mo:B]TR[rl][qn][po][pp][qq][rq]C[black does not need to push in fact because he is alive without]))))