(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]RU[Japanese]SZ[19]KM[0.00]PW[blanc]PB[noir](;B[pd](;AW[dd][qk][cn][qn][dp]AB[qi][jp][qp][fq][pq]LB[dd:4][pd:1][qi:11][qk:10][cn:6][qn:8][dp:2][jp:7][qp:9][fq:5][pq:3](;W[ri]LB[qf:A]C[not a good attach : invasion at A is not possible after this attach];B[rh];W[rj];B[qh];W[nc];B[pc]C[corner becomes black territory])(;W[ok];B[oi]C[even if black jumps too, it's not black territory yet]))(;AW[cc][fc][dd][qo][pq]AB[hc][bd][cf][ci][dp]LB[cc:8][fc:6][hc:11][bd:7][dd:2][pd:1][cf:5][ci:9][qo:10][dp:3][pq:4](;W[hb]C[makes black strong on the right side and it's good for black because he has a stone at the hoshi])(;W[bc];B[fb]C[but this attach is good because white is alive on the left];W[gb];B[gc];W[eb];B[fd];W[ec];B[hb]C[black has something outside]))(;W[dd](;B[cp]C[1 Dan players];W[pp];B[fq];W[nc];B[kd];W[qf];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[gc];W[cf];B[db];W[jd];B[jc];W[ic];B[kc];W[cc];B[ge];W[id];B[kf];W[if];B[gg];W[ih];B[gi];W[kg];B[lg];W[jf];B[lf];W[ij];B[ch](;W[bh]C[not a good move];B[bi];W[bg];B[ci];W[jp];B[qn];W[ro];B[qo];W[qp];B[rn];W[rp];B[qk];W[fo];B[hk];W[jl];B[im];W[ho];B[jm];W[kl];B[km];W[ll];B[lm]LB[bh:A]C[now white is on danger on the center and the bottom group is not alive yet. Black can also choose to invade the bottom. IT was all due to the A exchange, black had a good moyo])(;W[cb];B[bf]C[good for black];W[bg];B[cg];W[be];B[df];W[ce];B[bh])(;W[fd]C[white counter attack];B[gd];W[ff];B[gf](;W[eh]C[difficult for black to stop white from coming out](;B[ei];W[fh])(;B[ck];W[ej]C[there's no moyo anymore and white is attacking black group])(;B[eg](;W[dg];B[dh];W[fg];B[ei];W[fh])(;W[fg]C[does not help white];B[fh](;W[dg];B[ei];W[dh];B[di])(;W[ei];B[dg](;W[ek];B[ee];W[fe];B[ed];W[fc];B[ec])(;W[ef];B[cj]C[situation is not clear for both])))))(;W[dh];B[di];W[eh]C[depends on reading if white can come out or not])))(;B[pq]C[1 kyu players];W[dp];B[cn];W[fq];B[bp];W[cq];B[ck];W[po];B[pl](;W[qq];B[qr];W[qp];B[or];W[no];B[lq]LB[mp:C][mq:B][nq:A]C[black will not play at A as when white jumps first, he will play B or C];W[qm];B[ql];W[rm];B[rl];W[qf];B[qh];W[ph];B[qi];W[qc];B[qd];W[pc];B[od];W[rd];B[re];W[rc];B[qe];W[nc](;B[fc];W[cf];B[db];W[cc];B[ic];W[nd];B[ne];W[me](;B[nf];W[nh]C[white is jalous about black territory but it's overplay];B[mf];W[lc]C[white defend an alive group. He should play another tobi on the center to make his overplay from before a better stone];B[ch];W[cb];B[hq];W[bq];B[lh];W[mi];B[li];W[mk](;B[oi]C[not the right thing to do (too small). Black should want to play outside and keep white groups separated];W[sl]C[useless : white should connect his groups with a tobi for example];B[pm];W[pn];B[mm];W[lj];B[nj];W[mj];B[rr];W[rq];B[sk];W[sm];B[rj]C[black should be sure to have this sente because white would escape if the bottom group is already alive](;W[ro]C[white is too soft];B[jj]C[better move to attack. Hane would be pointless because white move out and black does not gain something on the center];W[jk];B[ik];W[jl];B[kj];W[lm](;B[ml];W[ll];B[kk];W[mn];B[nk];W[nm];B[nl];W[lk];B[ln];W[lo];B[kn];W[jm];B[ko];W[hl];B[fr]C[very good attach move];W[er];B[fp]C[even if white connect directly, black did not loose something but had a stone on the outside to attack white center group];W[gr];B[gq];W[eq];B[eo];W[go];B[hn];W[hk];B[ij];W[hm];B[gn];W[fm];B[fk];W[hj];B[gm]C[black thinks it's engouh to take this stone];W[fj];B[ek];W[gi]LB[hh:A]C[too slow : tobi would be better. black would not peep because it will help white to escape];B[bf];W[be];B[df];W[bg];B[cg];W[ce];B[hh];W[eg](;B[eh];W[fh];B[fg];W[ei];B[dh];W[gg];B[ff];W[gh];B[le];W[gf];B[fe];W[ih];B[md];W[mc];B[bh];W[af];B[hr];W[fs];B[lp];W[ii])(;B[fg]LB[ef:A][eh:B]C[A and B are miai]))(;B[ll];W[ml];B[ln];W[km];B[kk];W[nm];B[mn]LB[nl:A][nn:B]C[white has two cutting points]))(;W[nq];B[nr];W[jj];B[ro];W[mq];B[mr];W[lp];B[kq];W[rn];B[qo];W[pp];B[so];W[qn]C[difficult to kill white]))(;B[mm];W[lj];B[pm]C[good for black : two weak groups to attack]))(;B[mf]C[nobi is fine here but double hane is possible];W[le];B[lf]C[push white on the left because black has some stones there and white is not making points as black]))(;B[pm];W[ro];B[qn];W[rn];B[rq];W[rp];B[rr];W[pn];B[sm]C[white is not alive on the corner yet]))(;W[no];B[nq];W[qq];B[qr];W[pi]C[if white tries to live, it's good for black because white is too pacific]))))(;B[qd];W[dd];B[pq];W[dp];B[fc];W[cf];B[kc];W[po];B[pl];W[mp];B[oo];W[on];B[no];W[pp];B[nq];W[qq];B[oq];W[nn](;B[mn]C[trick move](;W[pm]C[white proteck his weakness and black does not have any good continuation];B[mo]C[if black connects];W[ql]C[too good for white])(;W[qr];B[pn];W[pm];B[qn];W[qm];B[ro];W[qo];B[rn];W[rm];B[rp];W[qp];B[om];W[nm];B[ol]LB[ml:A][rl:B]C[A and B are miai : game over];W[mm];B[rl];W[mo];B[mq];W[ln];B[kq];W[iq];B[ir]C[it's not a good attach move because black does not have to worry about the life and death race on the corner](;W[hr];B[jr];W[hq]C[white is strong on the left])(;W[pr];B[or];W[rq];B[pe])))(;B[mo];W[qr];B[pn];W[pm];B[qn];W[qm];B[ro];W[qo];B[rn];W[rm];B[rp];W[qp];B[om]C[ladder works for white and black has a severe ladder breaker];W[rk];B[de];W[df]C[white still want to fight])))