(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[7.50]PW[郑斗镐]PB[Liu Yuanbo(MilanMilan)]WR[一段]BR[二段]DT[2013-05-23]EV[1st Mlily Cup, preliminary]PC[The KGS Go Server at http://www.gokgs.com/]SO[Go4Go.net]RE[黑胜白](;B[pd];W[dp];B[pq];W[dd];B[fq];W[cn];B[ip](;W[pn];B[qo](;W[qf];B[pi]C[best answer to punish white (pincer to use black moyo)](;W[nc]C[which stone should black attach ?](;B[pf]C[attach the strong stone is usually correct but in this situation, white would get a big corner (see variations) or black pincer stone would not be efficient];W[pg];B[of](;W[qd];B[qe];W[re];B[pe];W[rg];B[qc];W[rd];B[og];W[jd];B[ph](;W[pc](;B[qg];W[oc];B[rf];W[rc];B[nn]C[black has more potential. It means that white should have take the san san point to let black with a useless wall](;W[po]C[white can't sacrifice his stone because right side would be huge for black];B[pp];W[qn];B[ro];W[pk](;B[nm](;W[rn];B[ol];W[rj];B[ri];W[pj];B[pl];W[ql];B[rl]C[very good tessuji](;W[op];B[oo];W[np];B[rq]C[vital point];W[kq];B[jq];W[jo];B[jp]C[move to fight (if white blocks, black cuts). If black defend, white would get moves to move outside];W[no];B[lo];W[lp];B[mo];W[on]C[white is connected but there's still trouble];B[qk];W[qm];B[rk];W[jr];B[kp];W[mq];B[lr]C[if black atari, white can have a ko fight];W[kr];B[ir];W[or];B[oq];W[nr];B[pr];W[ls];B[ms];W[js];B[ks];W[ko];B[mp];W[lq];B[nq];W[hq]C[white can live on the bottom but black can kakari at the corner in sente];B[hr];W[hp];B[io];W[iq];B[gq];W[ho];B[in];W[hn];B[im];W[hm];B[dr];W[hl];B[cq];W[cf];B[cl]C[black has a fighting style !];W[eq];B[er];W[cj];B[kn];W[ls]C[white should have left the bottom group to build a moyo playing a tobi and an ogeima];B[dj];W[di];B[hj];W[ij];B[em];W[eo];B[fo];W[fn];B[en];W[fp];B[do];W[cp];B[ep];W[qj];B[sj];W[eo];B[ik];W[hk];B[ep];W[ln];B[jn];W[eo];B[ii];W[jj]LB[eb:A]C[white can't leave the ponuki because black can invade at the top or kill bottom group];B[ep];W[ko];B[mn];W[eo];B[ji];W[hi];B[gj];W[il];B[ep];W[dk];B[gp];W[dl];B[ej];W[fk];B[ck];W[fj];B[ei];W[ci];B[ek];W[el];B[fl];W[dm];B[gk]C[white resigned];W[fi]C[black can leave those stones ];B[gi];W[eh];B[hh])(;W[qk];B[nj];W[rm];B[sl]LB[sj:B][pm:A]C[A and B are miai, white is dead])(;W[rk];B[qm];W[qk];B[rm];W[pm];B[nj]C[white is dead];W[sj];B[sl];W[sn];B[sm];W[sk];B[rm];W[oo];B[nq];W[rq];B[qp];W[so];B[qr]))(;W[nk]C[dangerouis for white];B[ol];W[ok];B[pl];W[ql];B[qk];W[qj];B[rk];W[rj];B[rl];W[qm];B[rm]))(;B[nk];W[no];B[oo];W[on];B[op];W[nm];B[mn];W[nl]C[good for white]))(;W[oq];B[op];W[np];B[pp];W[kq]C[white can live])(;W[kq];B[jq];W[ko];B[nl]C[right side is really big])(;W[qk];B[rm];W[ok];B[mk];W[nj];B[mj];W[ni];B[lh]))(;B[oc]C[if black wants to destroy white top side territory];W[pb];B[ob];W[qb]TR[qj][qk]C[it will be difficult for black to attack the single stone because white has marked space in sente]))(;W[qg]LB[ri:A][qj:B]C[sometimes white skip this exchange to play at A or B];B[ri];W[pc];B[oc];W[pb];B[ob];W[qb]TR[oh][qj]C[white is alive and black is not very solid but black is sente to attack white single stone]))(;W[qe]C[much popular but difficult];B[qd];W[og];B[nd];W[md];B[ng];W[od];B[pe];W[qh];B[ne])(;W[qc]C[if white wants to play san san , he should not hane before];B[qe];W[pc];B[rf]C[most of the professionals think that this joseki is good for black because he has a powerful shape];AE[pc][qc][qe][of][rf][pg];W[qc](;B[qe];W[pc];B[]C[if black tenuki];W[qg];B[pg];W[re])(;B[pc]C[black can choose this side];W[qd];B[qe];W[re];B[pe];W[rg];B[qg];W[rf];B[qh]C[white lives smaller];W[jd]C[but black wall is not useful])))(;AE[pi]AB[pj]LB[qj:A]TR[pj]C[if black pincer was further (A is the same)](;B[nd];W[md];B[ne];W[qc](;B[oc];W[qd];B[mc]C[black is solid on the top but black pincer stone is not efficient])(;B[qd];W[pc]C[white has a huge corner]))(;B[pf];W[pg];B[of];W[qd];B[qe];W[re];B[pe];W[rg];B[qc];W[rd];B[og];W[ph];B[oh];W[jd]C[white is better])))(;W[of];B[nc];W[rd](;B[qc];W[ri]C[old joseki];B[po];W[]C[later];B[pg];W[pf];B[rh];W[qh];B[qi];W[rg];B[rj];W[sh]C[black can have a powerful shape on the right])(;B[pg]C[this is possible (if black wants to keep the lower side)];W[pf];B[rg];W[qg];B[qh];W[rf];B[qc];W[rh];B[ri];W[sg]C[but white is already alive])))(;W[qn];B[po];W[on];B[pj]C[is it good for white ?];W[oo];B[nq]C[black has lot of points and white is heavy and not alive])(;W[po](;B[qp];W[qn];B[nq];W[qj]TR[ip][fq]C[black gets big corner, white looks comfortable and black marked stones does not seems efficient])(;B[qn]C[better choice for black (to start a fight)];W[pp];B[qp];W[oq];B[pm]C[a fight begins but it's not good for white because black already has some stones on the left])(;B[pp];W[qn];B[ro];W[mo];B[rn];W[ql]TR[ip][fq]C[this is locally joseki but marked stones are useless]))(;W[qj]LB[qf:C][qg:B][qn:A][kq:E][oq:D]C[A and B (or C) are miai and later, white can invade at E or D])(;W[pj];B[qn];W[qf];B[nc]LB[qj:A][pl:B]C[same as A extension (for white). but white can take the san san later or jump at B to save his stone])(;W[qi];B[po]LB[rm:B][qn:A]C[A or B for black is also possible. But this shape is the solid move];W[qf];B[qe];W[pf];B[nc]LB[fc:D][kq:C]C[now white can take the shimari at D or invade at C]))(;W[po]C[what is the problem ?](;B[pl]C[(pincer is not the best answer)](;W[no];B[nq];W[lo];B[lq];W[qq];B[qr];W[qj]C[white is solid to attack black stone])(;AE[ip]AB[jp](;W[no];B[nq];W[lo];B[mp];W[mo];B[pi]C[white thickness is useless])(;W[mp];B[oo];W[on];B[no];W[pp](;B[nq];W[qq];B[oq];W[nn];B[mo];W[rp]LB[ip:B][iq:A]C[white is alive on the corner and black formation has weakness])(;B[oq]C[black plays this joseki because he has some stones on the left];W[qq];B[qr];W[op];B[np];W[nq]C[ladder is good for white];B[mo]C[but black can fight because he has some stones on the left]))))(;B[oo](;W[on];B[op];W[pm];B[nn];W[nm];B[mm];W[mn];B[no];W[nl];B[ml];W[nk];B[ln]TR[ip]C[black has a solid shape and marked stone is well placed (instead of the hoshi)])(;W[qq];B[pp];W[qp];B[pn];W[qo];B[qn];W[pr];B[or];W[on];B[no];W[qr];B[nq]C[useally it's a good fight for black])))(;W[qn]C[can white plays this kakari];B[po];W[rp];B[ql];W[pn];B[qo];W[ro];B[qq];W[rm];B[on];W[pl];B[om];W[pk](;B[ko]C[black has excellent shape with many points])(;AE[ip]AB[jp]C[If black stone was at Hoshi];B[fo];W[lq];B[lp];W[mp];B[lo];W[jq];B[iq];W[kr];B[ir];W[or]LB[oq:A]C[sometimes white plays A, but black can't kill white])))(;B[pd];W[dd];B[qp];W[dp];B[fq];W[cn];B[op];W[jp];B[lq];W[eq];B[fp];W[hp];B[fm];W[im];B[dm];W[dn];B[en];W[el];B[em];W[bl];B[ej];W[qf];B[qi];W[nd];B[pf];W[qc];B[qe];W[pc];B[rd];W[kc];B[ko];W[km];B[mn];W[ml];B[in];W[pq];B[oq];W[hn];B[jn];W[gm];B[gl];W[jm];B[ep];W[dq];B[gn];W[hm];B[ho];W[fr];B[gr];W[go];B[io];W[fn];B[fo];W[gp];B[gn];W[pi];B[qh];W[fn];B[er];W[gn];B[dr];W[cr];B[dl];W[pj];B[nf];W[rc];B[pl];W[qj];B[nk];W[pn];B[qn];W[qm];B[pm];W[ql];B[on];W[rn];B[po];W[ro];B[rk];W[qk];B[rj];W[rp];B[rq];W[rl];B[jj];W[lo];B[kp];W[ln];B[lj];W[mq];B[mr];W[hk];B[sm];W[qq];B[rr];W[ph];B[pg];W[nh];B[md];W[mc];B[ld];W[nc];B[gj];W[gk];B[hj];W[fk];B[fl];W[ek];B[dk];W[fj];B[fi];W[no];B[hl];W[pp];B[pr];W[ik];B[il];W[jk];B[jl];W[kk];B[kl];W[lk];B[mm];W[qo];B[oo];W[ll];B[lm];W[nl];B[ei];W[lr];B[kr];W[kn];B[jo]C[Paek Seongho, 9p (B) vs Kim Miri 2p];W[gi];B[gh];W[hi];B[hh];W[ii];B[ih];W[jh];B[fc];W[fe];B[jc];W[fh];B[ji];W[ij];B[fg];W[eh];B[de];W[dh];B[ee];W[hr];B[bk];W[nr];B[ls];W[nn];B[nm];W[mo];B[om];W[nq];B[or];W[ns];B[ip];W[hq];B[np];W[mp];B[qr]))