(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
GN[The 28th WAGC Round6]PW[Victor Guang Chow]PB[Cristian Pop]WR[6d]BR[6d]PC[Tokyo NihonKiin]AN[Alexander Dinerchtein]RE[B+10.50]
;B[pd]C[This is the game from the World Amateur Go Championship-2007. Black is Cristian Pop, 6-dan (Romania). White is Victor Guang Chow, 6-dan (South Africa)]
;W[fd]
;B[pp]
;W[eo]C[The opening is weird, but it's typical for Victor Guang Chow. He has an 8-dan account on IGS and beat lot of professionals by playing such openings]
;B[cd]
;W[cc]
;B[dc]
;W[dd]
;B[db]
;W[cb]
;B[bb]
;W[bc]
(;B[ed]C[Nowadays this joseki is popular -]
;W[de]
;B[ee]
(;W[ec]C[White is playing for influence -]
;B[eb]
;W[fc]
;B[bd]
;W[ef]
;B[ca]
;W[fe]C[The result is equal. White's shape is extra-thick, but it's not easy to use it for making territory, because of open skirts from the both sides]
(;B[jp]C[The best place -]
;W[fq]
;B[pn]LB[mp:A][nq:B]C[Black may also defend at A or B]
(;W[lq]C[The invasion looks natural -]
;B[ko]C[The right answer]
;W[nq]LB[pq:A]C[It looks heavy. It's better to think about an attachment at A]
;B[mp]C[The vital point]
;W[pq]
;B[qq]
;W[qr]C[It's not easy for White to create a good shape here]
(;B[pr]C[A sharp plan -]
;W[oq]
;B[rr]
;W[qp]
;B[qs]
;W[rq]
;B[qr]
;W[no]LB[po:A]C[It's probably better to start from the atari at A, getting more sente moves]
;B[qo]
;W[lp]LB[nm:A]C[Is it better to jump at A?]
;B[km]
;W[nm]C[White is one step slow]
;B[mn]
;W[nn]
;B[mo]
;W[mq]
;B[jq]C[A sharp move]
;W[nk]C[White's group is weak, so he cannot play actively]
;B[ml]
;W[nl]
;B[lj]TR[ec][dd][fd][de][fe][ef]C[Black's group is getting stronger, so the marked wall is getting less and less attractive]
;W[ql]LB[ni:A]C[It's probably better to jump at A]
;B[co]
;W[cq]
;B[dm]LB[cl:A]C[The low extension at A is normal here]
;W[ck]LB[qf:A][em:B]C[A good move, but it's better to start from the kakari at A. Later White can attach at B, separating Black's groups]
;B[fn]
;W[qf]
;B[ni]C[A very thick move]
;W[pi]C[White has no choice. He has to defend]
;B[nc]
;W[rd]C[Too passive]
;B[qc]LB[kc:A]C[Black may think about extending at A]
;W[do]
;B[cp]
;W[dq]
;B[bq]
;W[br]
;B[dk]
;W[dj]
;B[ek]
(;W[cm]TR[co][cp][bq]C[I would prefer to cut off the marked stones -]
;B[cn]
;W[cl]
;B[dn]C[Now Black's shape is just ideal]
;W[go]C[It's already slow]
;B[cf]C[A huge move]
;W[ej]C[White is making his opponent stronger by pushing like this]
;B[fj]
;W[fi]
;B[gj]
;W[gi]
;B[hi]
;W[hh]
;B[hj]TR[ec][fc][dd][fd][de][fe][ef]C[Black is happy to connect his groups. 
We may see that the marked wall is exactly useless]
;W[ih]
;B[ch]
;W[ci]LB[ei:A]C[There is a big weakness at A, so White has to defend it]
;B[dh]
;W[ei]
;B[kc]C[Black ends in sente. Now he has a clear lead on territory]
;W[rc]
;B[ph]
;W[qh]
;B[qi]C[An aggressive idea. Actually it was not necessary to fight like this]
(;W[oh]C[It's not easy for White to find the answer -]
;B[pg]
;W[qg]
;B[pj]
;W[oi]
;B[pl]C[A good move]
;W[pk]
;B[qk]
;W[pm]
;B[oj]
;W[nj]
;B[rl]LB[nh:A]C[Black may start from the atari at A]
;W[ol]
;B[rm]
;W[mi]C[The result is successful for Black. He destroyed lot of points in sente]
;B[gn]LB[nh:A]C[Black can run at A, but it's not necessary for him]
;W[io]
;B[gp]
;W[fo]
;B[ho]C[A nice tesuji]
;W[hp]
;B[hn]
;W[ip]
;B[hq]
;W[iq]
;B[ir]
;W[hr]
;B[in]
;W[gq]
;B[jo]C[Black's shape becomes very thick]
;W[fp]
;B[ji]LB[nh:A]C[Black can still run at A, but he is trying to keep the game simple]
;W[ri]
;B[qj]
;W[nh]
;B[hc]TR[ec][fc][dd][fd][de][fe][ef]C[Black got the last important place. Now he has a clear 15 points lead on the board.

We can say, that White lost this game, because he did not use the marked thickness at all.]
;W[rj]
;B[rk]
;W[rb]
;B[he]
;W[hf]
;B[if]
;W[ge]
;B[hd]
;W[oe]
;B[pe]
;W[pf]
;B[ne]
;W[nf]
;B[od]
;W[me]
;B[of]
;W[ng]
;B[md]
;W[gb]
;B[hb]
;W[ha]
;B[ia]
;W[ga]
;B[jb]
;W[jr]
;B[hg]
;W[gf]
;B[ig]
;W[jh]
;B[gg]
;W[fg]
;B[ki]
;W[le]
;B[kf]
;W[kg]
;B[ke]
;W[ld]
;B[lc]
;W[pb]
;B[lg]
;W[lf]
;B[kd]
;W[mf]
;B[lh]
;W[gh]
;B[eh]
;W[fh]
;B[bi]
;W[bj]
;B[di]
;W[cj]
;B[qb]
;W[qa]
;B[ob]
;W[pc]
;B[qd]
;W[mm]
;B[lm]
;W[lo]
;B[ln]
;W[bp]
;B[bo]
;W[aq]
;B[oc]
;W[pa]
;B[oa]
;W[ra]
;B[mk]
;W[kq]
;B[bh]
;W[bm]
;B[or]
;W[nr]
;B[qm]
;W[ii]
;B[ij]
;W[jf]
;B[ie]
;W[li]
;B[kh]
;W[jg]
;B[ce]
;W[mj]
;B[kk]
;W[dg]
;B[ai]
;W[cg]
;B[bg]
;W[oo]
;B[po]
;W[aj]
;B[pl]
;W[dl]
;B[el]
;W[ql]
;B[fb]
;W[gc]
;B[fa]
;W[je]
;B[jd]
;W[os]
;B[pl]
;W[en]
;B[em]
;W[ql]
;B[oe]
;W[og]
;B[pl]
;W[rp]
;B[ro]
;W[ql]
;B[rh]
;W[rg]
;B[pl]
;W[sr]
;B[sp]
;W[ql]
;B[sj]
;W[sh]
;B[pl]
;W[ac]
;B[ad]
;W[ql]
;B[qe]
;W[re]
;B[pl]
;W[bf]
;B[af]
;W[ql]
;B[ao]
;W[pl]
;B[ap]
;W[bq]
;B[dp]
;W[ep]
;B[am]
;W[al]
;B[an]
;W[on]
;B[sk]
;W[si]
;B[sq]
;W[mh]
;B[ps]
;W[ns]
;B[jl])
(;W[pj]
;B[qe]
;W[rf]
;B[qg]
;W[rh]
;B[pf]
;W[rg]C[This is probably the best way for White]))
(;W[cn]
;B[cm]
;W[bn]
;B[cj]
;W[lc]C[White can take some territory and keep sente]))
(;B[oq]
;W[pr]
;B[np]
;W[or]
;B[op]
;W[qi]
;B[mq]
;W[rq]
;B[qg]
;W[ql]
;B[co]
;W[cq]
;B[cl]C[This is the most simple strategy]))
(;W[qi]
;B[qk]
;W[qf]
;B[qe]
;W[pf]
;B[nc]
;W[oi]
;B[co]
;W[cq]
;B[cl]C[It would be hard for White to use the thickness by playing classic moves]))
(;B[mc]
;W[mp]
;B[pn]
;W[mm]C[This is the wrong direction. White's moyo would be really deep]))
(;W[ce]
;B[fc]
;W[ef]
;B[fe]
;W[dg]C[It's a joseki too]))
(;B[bd]
;W[ab]
;B[ba]
;W[ca]
;B[fb]
;W[de]
;B[ad]
;W[ce]
;B[ac]
;W[aa]
;B[bb]C[It's an old fashion. The result considered to be slightly favorable for White]))