(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]
PW[Yo Kagen]PB[Cho Chikun]WR[9p]BR[9p]DT[2008-03-03]EV[4th Toyota  & Denso Cup the last preliminary tournament of Japan]RE[B+0.50]
;B[qd]C[This is the game from the last Japanese preliminary tournament of the 4th Toyota & Denso Cup. Black is Cho Chikun, 9-dan. White is Yo Kagen, 9-dan]
;W[qp]
;B[cp]
;W[dd]
;B[oq]
;W[oc]
;B[pn]
;W[op]
;B[pp]
;W[po]
;B[pq]
;W[qo]
;B[oo]
;W[np]
;B[qq]
;W[qn]
;B[pm]C[A rare pattern]
;W[no]
;B[on]
;W[qm]
;B[nn]
;W[nq]
;B[ql]
;W[rl]
(;B[rk]C[A joseki, but this result is not interesting for Black -]
;W[rq]
;B[rr]
;W[rp]
;B[nr]
;W[mr]
;B[or]
;W[qk]
;B[pl]
;W[rj]
;B[mo]LB[pk:A]C[Atari at A is possible, but it's better to keep it in reserve]
(;W[lp]LB[hq:A]C[Usually White plays at A directly -]
;B[mp]
;W[hq]
;B[lq]
;W[eq]TR[lp][mp]C[It's hard to say that the marked exchange is good for White]
;B[fc]
;W[hc]
;B[cc]C[Black is thick, so he can play more actively]
;W[dc]
;B[cd]
;W[de]
;B[db]
;W[eb]
;B[cb]
;W[ec]
;B[cf]TR[pl][ql][pm][nn][on][pn][mo][oo][mp][lq]C[Black's position on the left is low and we cannot say that the marked wall is working]
;W[cr]C[A very solid move]
;B[ep]
;W[fq]
;B[cm]LB[dl:A]C[I would prefer to extend at A. The move in the real game looks too passive]
;W[eg]
;B[kc]TR[qd]C[It's hard for Black to invade here, because the marked stone is weak]
;W[qb]C[Now it's a promising game for White]
;B[mc]
;W[oe]
;B[qf]
;W[nc]LB[pb:A]C[A good move, which prevents an attachment at A]
;B[me]
;W[pg]
;B[rh]
;W[rc]C[A key point]
;B[qi]
;W[qj]
;B[pi]
;W[jd]LB[jb:A]TR[kc][mc][me]C[Is it the best way of attacking the marked group? White can start from keima at A as well]
;B[ib]
;W[hb]
;B[qc]
;W[rb]
;B[ng]
;W[ke]LB[pf:A]C[The connection at A is probably better]
;B[pf]C[A very thick move]
;W[kg]LB[bf:B][cg:A]C[White forgot to make the A-B exchange]
;B[ic]
;W[id]
;B[mb]
;W[nb]
;B[cg]C[Black saved his group in sente. Now the position looks equal]
;W[dl]LB[ck:A]C[White may also think about invading at A]
;B[cl]
;W[dj]
;B[iq]
;W[hp]
;B[ip]
;W[io]
;B[ho]
;W[in]
;B[hr]
;W[go]C[White got a wall, but lost a lot of points on the sides]
;B[el]C[A nice tesuji]
;W[dm]
;B[dk]
;W[ek]
;B[ck]
;W[dn]
;B[ej]
;W[fk]
;B[cn]
;W[ei]
;B[fn]
;W[gn]
;B[fl]
;W[gk]
;B[gl]
;W[hk]
;B[gq]
;W[gp]
;B[gr]
;W[eo]
;B[dp]
;W[fp]
;B[en]
;W[hl]
;B[do]C[Now Black is slightly ahead]
;W[mg]
;B[nf]
;W[mj]LB[lk:A]C[Is it better to defend at A?]
;B[jo]LB[lk:A]C[The wrong direction. First of all Black has to reduce the moyo around A]
;W[jn]
;B[ko]
;W[lm]C[White got a lot of points in the center. The position is close again]
;B[di]
;W[fj]
;B[ci]
;W[bq]
;B[ml]
;W[ll]
;B[kn]
;W[km]
;B[mh]
;W[lh]
;B[mi]
;W[li]
;B[mk]
;W[lj]
;B[gm]
;W[hm]
;B[fr]
;W[er]
;B[ea]
;W[fa]
;B[da]
(;W[fb]LB[ef:A]C[White has to defend here, because of the attachment at A -]
;B[sr]
;W[oi]
;B[oh]
;W[an]
;B[am]
;W[dh]
;B[ch]
;W[rd]
;B[re]
;W[jc]
;B[jb]
;W[ap]
;B[bo]LB[bn:A]C[Is it the right order? An atari at A looks better]
;W[ao]
;B[bn]
;W[ok]
;B[bp]
;W[aq]
;B[dg]
;W[eh]
;B[rm]
;W[sk]
;B[rn]
;W[ro]
;B[mm]
;W[ln]
;B[lo]
;W[fs]C[Now it's a 0.5 point game. Cho Chikun, 9-dan was more lucky finally.]
;B[mf]
;W[lg]
;B[cq]
;W[br]
;B[sq]
;W[sm]
;B[df]
;W[ef]
;B[ni]
;W[oj]
;B[pc]
;W[pb]
;B[na]
;W[oa]
;B[ma]
;W[of]
;B[og]
;W[se]
;B[sf]
;W[sd]
;B[ol]
;W[ce]
;B[be]
;W[nj]
;B[nh]
;W[qg]
;B[rf]
;W[rg]
;B[sg]
;W[nd]
;B[md]
;W[qe]
;B[pe]
;W[pd]
;B[od]
;W[bd]
;B[bf]
;W[pd]
;B[ne]
;W[qe]
;B[od]
;W[qd]
;B[lk]
;W[kk]
;B[ir]
;W[dq]
;B[gs]
;W[es]
;B[lf]
;W[kf]
;B[sp]
;W[sn]
;B[kb]
;W[ia]
;B[ja]
;W[ha]
;B[oe]
;W[fo]
;B[kd]
;W[le]
;B[ld]
;W[cj]
;B[bj]
;W[ej]
;B[pc]
;W[ob]
;B[ri]
;W[si]
;B[mn]
;W[nk]
;B[nl])
(;W[ia]
;B[fb]
;W[ga]
;B[ef]
;W[df]
;B[dg]
;W[fg]
;B[ee]C[White would be in trouble]))
(;W[hq]
;B[lq]
;W[eq]C[This is the normal way]))
(;B[mo]
;W[nr]
;B[rp]
;W[qk]
;B[pl]
;W[rm]
;B[kp]C[This pattern is more attractive]))