(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[6.50]TM[6000]OT[5x60 byo-yomi]DT[2013-06-08]PC[The KGS Go Server at http://www.gokgs.com/];B[pd];W[dp];B[pq];W[ce];B[fq]LB[dc:A]C[approach this stone because locally it's better for making territory];W[dn](;B[ip]C[black has to play a higher stone, otherwise his formation would be flat];W[ee]C[why does white plays at the fifth line ? because the left is developable and black has a territory opening so it's better to reduce black](;B[fc]C[black can play the chineese formation ];W[dc];B[id];W[qo];B[pl](;W[ko]C[white reduce black first];B[po]C[if black defend the bottom, he would be flat when white extend];W[kq](;B[jq];W[pp]C[only move for white to attack black without heavy group];B[op];W[qp];B[qq];W[qm];B[ql](;W[om];B[oo];W[pm];B[ol];W[nm];B[mk];W[lm]C[white stones are connected. What is black benefit ? he lost the bottom corner but has a potential at the top right];B[kr];W[lq];B[nq];W[lr];B[pf];W[kc]C[approach near the weakest stones](;B[ke]C[to keep the center potential];W[pc];B[oc]C[black wants to keep pressure on white (hane the other side will help white to settle his group];W[ob](;B[qc];W[pb](;B[od];W[qb];B[rc];W[mc];B[nc];W[nb];B[md];W[ld];B[le];W[me];B[nd]C[white get a stone on opponent moyo. What shoud white do ? develop or reduce ?];W[rq]C[forcing move];B[rr];W[rp];B[sr];W[dr]C[protect the corner and pressure black group];B[cj]LB[ck:A]C[with A, it would be difficult for white to choose a good move to defend top and bottom];W[hq];B[hp];W[gq];B[gp];W[fr];B[eq];W[er];B[fn];W[cl](;B[cg];W[kk];B[kd]C[forcing moves to get stronger];W[lc];B[jc];W[jb];B[ib];W[kb];B[fl]C[good move because white can split black stones but a two space extension would be better];W[dj];B[di];W[dk]C[better nobi : when you attack, don't leave stones alone (separated from strong group)];B[fj];W[ei];B[dh];W[fi];B[bf];W[hc]C[white does not need to defend the corner right now because it's not that weak];B[ic];W[gj];B[gk];W[bj];B[bi];W[ci];B[ch];W[bk];B[be];W[bd];B[bc];W[ad];B[ae];W[cc];B[ag];W[hj];B[il];W[in];B[hn];W[mi];B[ml]C[black can't defend his territory calmly because he will lost all of his points];W[pj];B[oj];W[oi](;B[rl];W[mm];B[li];W[pg];B[qi];W[pi];B[qh];W[qg];B[ph];W[og];B[nf];W[ng];B[lh];W[qe];B[qd];W[of];B[mf];W[ok];B[nj];W[nl];B[nk];W[ni];B[lj];W[qj];B[rj];W[rk];B[qk];W[ri];B[sk];W[rh];B[pk];W[im]C[white won the game. Black does not have enough territory])(;B[mm];W[rl];B[rk];W[rn];B[sl];W[rm]C[white is alive]))(;B[cf]C[black uses forcing move to live (better choice)];W[df];B[cg];W[be];B[dg];W[eg];B[eh]))(;B[nc];W[qd];B[qe];W[rd];B[rc];W[od];B[pe];W[nb];B[mc]C[black gained more outside]))(;B[pb];W[qc];B[qb];W[od];B[nc];W[qd];B[pe];W[nb];B[rb];W[mc];B[nd];W[le];B[kf];W[ne];B[oe];W[md];B[od];W[nf]C[good for white (black left group is not safe yet)]))(;B[mc]C[wrong direction for black];W[ke];B[if];W[kg];B[ih];W[ki];B[jc];W[qc]))(;W[oo];B[pn];W[oq];B[np];W[pm];B[on];W[om];B[nn];W[nq];B[qn];W[rn];B[rm];W[ro];B[rl];W[rq];B[rr];W[sr];B[qr];W[or];B[sp];W[sq];B[sn];W[rp];B[sm];W[so];B[ss];W[rs];B[qs]C[Ko fight but black takes first])(;W[pn];B[oo];W[on];B[nn];W[om]C[very painful for white]))(;B[qp];W[ir];B[hq];W[eq]C[very good for white]))(;W[no];B[oo];W[on];B[op];W[pn];B[nn];W[nm];B[mn];W[ol];B[pj]TR[ip]C[marked stone is useful])(;W[oo];B[np];W[qq];B[qr];W[rq];B[pp];W[po];B[qm];W[no];B[mp]C[painful for white])(;W[pn];B[oo](;W[on];B[no];W[nn];B[mo])(;W[qq];B[qr];W[pp];B[oq];W[op];B[np];W[nq];B[rq];W[qp];B[or];W[nr];B[os]C[white has two weak groups])))(;B[ec];W[fc]C[white can't take the corner (san san) because black extend and have a better benefit. Usually we don't play contact move because opponent become stronger but to squeeze black here, this move is the best];B[fb];W[fd];B[gb];W[db];B[eb];W[dc];B[hd];W[jd]C[black is really heavy (seems good for white)]))(;B[jp];W[ho]C[black does not have to worry about that];B[po];W[hq];B[cq]))