(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[6.50]
PW[Cho Chikun]PB[Sato Masaharu]WR[9p]BR[9p]DT[2008-03-10]EV[17th Ryusei tournament block-C]RE[W+Resign]
;B[pd]C[This is the game from the 17th Japanese Ryusei tournament. Black is Sato Masaharu, 9-dan. White is Cho Chikun, 9-dan]
;W[dc]
;B[dq]
;W[pp]
;B[de]
;W[ce]
;B[cf]
;W[cd]
(;B[gf]C[A rare idea -]
;W[gc]
;B[nq]
;W[lq]
;B[no]
;W[pn]
(;B[ip]LB[kp:A]C[Black may think about pressing at A -]
;W[oq]
;B[nr]
;W[lo]
;B[nm]
;W[pl]
;B[kp]LB[np:A]C[It's probably better to skip this exchange. It makes the weakness at A bigger]
;W[lp]
;B[op]C[Now Black has to defend]
;W[pq]C[White is happy to answer. The invasion at san-san is not possible anymore]
;B[lm]
;W[jo]LB[kn:A]C[Kosumi at A is another option]
;B[kq]
;W[ko]
;B[lr]
;W[km]
;B[ll]
;W[hn]
;B[hp]
;W[mr]C[A clever probe]
;B[mq]LB[kr:A][or:B]C[Black can defend at A, but he wants to prevent the sente block at B]
;W[oo]
;B[np]
;W[gp]
;B[jr]C[White's plan is successful]
;W[do]
;B[gn]C[A brave move]
;W[hm]
;B[go]
;W[cq]
;B[cr]
;W[cp]
;B[hk]C[Black is behind on territory, so he wants to fight]
;W[gm]
;B[en]
;W[cm]
;B[dl]
;W[fl]
;B[dm]
;W[cl]
;B[ck]
;W[dn]
;B[eo]
;W[ep]
;B[dk]
;W[eq]C[A brave move, typical for Cho Chikun, 9-dan. He is sure, that he can save the center]
;B[il]LB[fj:A][fk:B]C[It's probably better to block at A or B]
;W[em]
;B[gq]
;W[fj]
;B[dh]
;W[gi]
;B[hi]LB[hd:B][bf:A]C[The straight attack is not working. It's probably better to start at A or B]
;W[hh]
;B[gh]C[An overplay]
;W[hj]
;B[ii]
;W[ij]
;B[gk]
;W[gj]
;B[fk]C[A new overplay. Black cannot cut here]
;W[fo]
(;B[fn]C[This is the fatal mistake -]
;W[ek]
;B[dr]
;W[br]
;B[dp]
;W[bn]
;B[ej]
;W[el]LB[dj:A][jk:B]C[A and B are miai]
;B[jm]
;W[dj]
;B[ei]
;W[cj]TR[gi][fj][gj][hj][ij]C[Black lost a lot of points here and the marked stones are still alive]
;B[bk]
;W[bj]
;B[ih]LB[kl:A]C[Black can only defend at A]
;W[jk]
;B[kl]
;W[ik]
;B[hl]
;W[jl]C[Sato Masaharu, 9-dan resigned here, because he cannot save the central stones.])
(;B[ih]
;W[fn]
;B[ek]C[Black can continue this game, if he kills some stones in the center]))
(;B[kp]
;W[kq]
;B[jp]
;W[lp]
;B[lo]
;W[jq]
;B[ip]
;W[hq]
;B[hp]
;W[gq]
;B[gp]
;W[fq]
;B[fp]C[His wall would be perfect]))
(;B[dg]
;W[fc]
;B[cl]C[This is the standard plan]))

