45th Honinbo Title Match, Game 4: Cho Chikun 趙 治勲 (B) v. Kobayashi Koichi 小林 光一 (W) (19th June 1990) W + Resign Komi 05.5

(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2] RU[Japanese]SZ[19]KM[5.50] GN[Cho Chikun v. Kobayashi Koichi (June 1990)]PW[Kobayashi Koichi,小林 光一]PB[Cho Chikun,趙 治勲]WR[9d]BR[9d]DT[1990-06-19,20]EV[45th Honinbo Title Match]RO[4]PC[Japan]WT[Challenger]BT[Honinbo]SO[Mainichi Shimbun]RE[W+Resign]ID[45/4] ;B[pd] ;W[dd] ;B[pq] ;W[cp] ;B[eq] ;W[po] ;B[dn] ;W[ep] ;B[dp] ;W[do] ;B[dq] ;W[co] ;B[eo] ;W[fp] ;B[cq] ;W[cn] ;B[dm] ;W[fo] ;B[en] ;W[cm] ;B[fn] ;W[fq] ;B[cl] ;W[bl] ;B[go] ;W[fr] ;B[bp] ;W[ck] ;B[dl] ;W[bj] ;B[ip] ;W[br] ;B[bq] ;W[es] ;B[er] ;W[ds] ;B[gr] ;W[gq] ;B[hr] ;W[hq] ;B[iq] ;W[cr] ;B[bm] ;W[bn] ;B[ar] ;W[dr] ;B[bs] ;W[am] ;B[qm] ;W[on] ;B[om] ;W[qq] ;B[qp] ;W[pp] ;B[rq] ;W[qr] ;B[pr] ;W[nm] ;B[qo] ;W[pm] ;B[ql] ;W[nq] ;B[rr] ;W[ol] ;B[cc] ;W[dc] ;B[cd] ;W[ce] ;B[be] ;W[bf] ;B[db] ;W[eb] ;B[ec] ;W[de] ;B[fb] ;W[cb] ;B[ea] ;W[bb] ;B[no] ;W[mo] ;B[mn] ;W[lo] ;B[nn] ;W[km] ;B[np] ;W[mq] ;B[hp] ;W[fs] ;B[gp] ;W[ir] ;B[jr] ;W[bo] ;B[mp] ;W[lp] ;B[lq] ;W[op] ;B[oq] ;W[nr])