(;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[2013-03-23]PC[The KGS Go Server at http://www.gokgs.com/];B[pd];W[dp];B[pq];W[dc];B[de];W[po];B[pl];W[dh];B[np];W[fd];B[fq](;W[no];B[mo](;W[nn];B[op];W[qq]C[If white want to play san-san, he should play before the previous exchange](;B[qr](;W[pp](;B[or];W[qm];B[ql];W[pm];B[ol];W[rq]C[result is good for black];B[fo];W[cn](;B[nc]LB[qd:A][rd:B][re:C][qf:D](;W[pi];B[qg]LB[ri:A]C[If white jump, black would connect with a keima];W[qh];B[pg];W[ni];B[ml]C[hard for white to continue : two weak groups](;W[li];B[lm])(;W[lm];B[ll];W[km];B[li]))(;W[re]C[better choice for white](;B[rd];W[qe];B[qd];W[qh]C[much better for white])(;B[qd];W[qh]))(;W[rd];B[rf];W[qe];B[qc])(;W[qd];B[qe];W[re](;B[rd];W[qc];B[rc];W[pe];B[qf];W[pc];B[od];W[rf];B[rb];W[qg];B[pf];W[og];B[pg];W[ph];B[of];W[nf];B[oe];W[oh]C[white can also connect from diwnstair but there would be less pressure on black three stones];B[qh];W[qi];B[rg];W[rh];B[qg];W[pj]C[result much better for white then the game])(;B[pe](;W[rc];B[rf];W[pc];B[oc];W[pb];B[se])(;W[rf];B[qc];W[rd];B[rc]))(;B[qc];W[rd];B[rc](;W[rf];B[pe])(;W[pe];B[qf];W[rf];B[qg];W[pc];B[od];W[pb])))(;W[qf];B[qe];W[pf];B[qh]))(;B[qf];W[nc];B[lc]))(;B[rq];W[oq]C[If white connect, black double tigger mouth and exchange is not good for white];B[qp];W[mp];B[lp];W[mq];B[nq](;W[mr];B[nr];W[lo];B[mn];W[kp];B[ln];W[ko];B[nm])(;W[lq];B[kp])))(;W[qp]))(;B[oo](;W[on];B[pn];W[pm];B[qn];W[qm];B[ro];W[rn];B[qo];W[ol]TR[qq]C[black take the corner and white the outside])(;W[qp];B[on]TR[nn][no]C[bad exchange for white (two useless stones)])))(;W[qq]C[timming is important. White should play the san-san first like in the chineese opening](;B[qr];W[op];B[oq];W[mp];B[nq];W[nn];B[lo];W[qp];B[rr];W[nl])(;B[pp];W[qp];B[oo];W[pn];B[on];W[fo]LB[nn:A]C[white does not need to play A anymore (like in the game)];B[qr]C[black habe before cutting to see white answer](;W[rr];B[qo])(;W[rn];B[rr];W[qk])))(;W[op];B[oq];W[mp];B[nq];W[nn];B[lo];W[qq]))(;W[nc];B[pf];W[dn];B[fo];W[ne];B[jj]C[Now, it's interesting for black to play Tengen : komi shouldn't be enough for white])(;W[fo];B[on];W[ef]))