(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[7.50]
PW[Iyama Yuta]PB[Chen Shiyuan]WR[9p]BR[8p]DT[2009-12-02]EV[10th Asian New Star Match 3rd round]RE[B+Resign]
;B[dp]C[This is the game from the 10th Asian New Star Match. Black is Chen Shiyuan, 8-dan (Taiwan). White is Iyama Yuta, 9-dan (Japan)]
;W[pd]
;B[cd]
;W[pq]
;B[fc]
;W[cj]
;B[qf]
;W[qh]
;B[qn]
;W[ql]
;B[qq]C[It's not a new strategy. I saw it a lot and I tried it as Black myself]
;W[qp]
;B[pp]
;W[rq]
;B[qr]
;W[po]
;B[op]
;W[qo]
;B[rr]
;W[no]LB[nc:A][pc:B][qc:C]C[It's a common joseki, but it's more active to defend at A, B or C]
;B[oo]
;W[on]
;B[oq]
;W[pn]
;B[ph]C[Now Black has sente for invading the second corner]
;W[pi]
;B[qc]
;W[qd]
;B[pc]
;W[od]
;B[rd]
;W[re]
;B[rc]
;W[qe]
;B[nc]LB[ph:A][pi:B]C[The A-B exchange is a useful probe]
;W[cn]
;B[fp]
;W[me]LB[cf:A]C[A big move, but an extension at A is probably better]
;B[qi]
(;W[qj]C[The best answer -]
;B[ri]
;W[rh]
;B[ch]C[The fuseki looks successful for Black]
;W[ej]
;B[eh]
;W[hq]C[White is losing, so he has to play actively]
;B[lq]
;W[fr]
;B[dn]
(;W[co]C[The sharpest way -]
;B[do]
;W[dm]
;B[em]
;W[cp]
;B[cq]
;W[dl]
;B[dq]C[Black got a thick shape - he has nothing to complain]
;W[fe]
;B[hd]LB[de:A]C[It's probably better to defend at A]
;W[de]LB[ec:B][ce:A]C[A-B are miai]
;B[dd]
;W[ce]
;B[ee]
;W[ef]
;B[ed]
;W[dg]
(;B[ff]C[Black's decision is correct -]
;W[dh]
;B[gf]C[Locally the result is very nice for White, but it's became harder for him to develop the right side moyo]
;W[be]
;B[cm]
;W[bm]
;B[cl]
;W[bl]
;B[jq]C[A key point. By attacking this group Black can reduce White's influence on the right]
;W[ho]
;B[oh]C[Black has no weak points, so he can start the fight]
;W[oi]
;B[nh]
;W[mc]
;B[nd]
;W[ne]
;B[oc]
;W[ni]LB[md:A]C[I would prefer to defend at A]
;B[md]C[It's huge!]
;W[mh]
;B[rf]
;W[se]
;B[mg]
;W[ng]
;B[oe]C[Black's combination is brilliant!]
;W[of]
;B[le]
;W[pe]
;B[lh]
;W[mi]
;B[mf]C[Black got lot of useful moves by sacrificing]
;W[nf]
;B[li]C[Now Black is slightly favorable, but the position is still close]
;W[lj]
;B[kj]
;W[ki]
;B[lg]
;W[lk]
;B[ji]
;W[kk]
;B[jj]
;W[bc]
;B[eg]
;W[df]
;B[ei]
;W[il]LB[cb:B][di:A]C[This move has a bad adji - it's more careful to block at A or defend at B]
;B[di]
;W[ci]
;B[bd]
;W[ad]
;B[cb]
;W[cc]
;B[db]
;W[hj]
;B[hh]
;W[fn]
;B[gn]
;W[go]
;B[fo]
;W[gm]
;B[en]
;W[kp]
;B[lp]
;W[lo]
;B[np]
;W[mo]
;B[jp]
;W[hn]
;B[cg]
;W[ag]C[Black is dead, but White has to add some stones later]
;B[bh]
;W[bi]
;B[ah]
;W[ab]
;B[rp]LB[bp:A]C[Maybe it's bigger to defend at A]
;W[ro]
;B[sq]
;W[ir]
;B[jr]
;W[bq]
;B[br]
;W[bp]
;B[er]
;W[fq]
;B[ar]
;W[eq]
;B[es]C[The right defense]
;W[ko]
;B[so]
(;W[sn]C[This is the losing move!]
;B[rn]C[Now White is in trouble!]
;W[sp]
;B[gp]
;W[hp]
;B[so]
;W[cs]
;B[cr]
;W[sp]
;B[pf]
;W[pg]
;B[so]C[Black has more threats]
;W[kq]
;B[kr]
;W[sp]
;B[sd]
;W[og]
;B[so]
;W[sm]
;B[bf]
;W[ae]
;B[jo]
;W[jn]
;B[rm]
;W[sp]
;B[el]
;W[dk]
;B[so]
;W[mp]
;B[mq]
;W[sp]
;B[sf]
;W[oe]
;B[so]
;W[nq]
;B[nr]
;W[sp]
;B[af]
;W[ac]
;B[so]
;W[or]
;B[pr]
;W[sp]
;B[dc]
;W[cf]
;B[so]
;W[sl]
;B[rl]
;W[sp]
;B[bg]
;W[ai]
;B[so]
;W[sk]
;B[rk]
;W[sp]
;B[bb]
;W[ag]
;B[so]
;W[sj]
;B[nn]
;W[sp]
;B[kn]
;W[mn]
;B[jm]
(;W[rq]C[White has no choice -]
;B[mm]
;W[nm]
;B[ln]
;W[nn]
;B[in]C[As a result White lost more than 10 points in the center.
Later Iyama, 9-dan did not have any chances]
;W[lm]
;B[rp]
;W[fs]
;B[bs]
;W[rq]
;B[gq]
;W[gr]
;B[rp]
;W[so]
;B[fj]
;W[km]
;B[hl]
;W[hm]
;B[ik]
;W[fk]
;B[gj])
(;W[in]
;B[nm]
;W[km]
;B[so]
;W[rj]
;B[pm]
;W[sp]
;B[mm]C[White cannot win the ko]))
(;W[rn]
;B[sn]
;W[sm]
;B[sp]
;W[rm]C[Maybe I am wrong, but I feel that White can win this game by 0.5 point]))
(;B[dh]
;W[fg]
;B[fi]C[Black can run away, but White can close his moyo on the right by attacking]))
(;W[dm]
;B[co]
;W[en]
;B[do]
;W[cm]
;B[dr]C[Black wanted to defend the corner like this]))
(;W[qg]
;B[pj]
;W[oi]
;B[qk]
;W[ri]
;B[rj]C[The adji would be bad]))

