(;GM[1]FF[4]CA[UTF-8]AP[CGoban:3]ST[2]
RU[Japanese]SZ[19]KM[0.00]
PW[Morikawa Masao]PB[Izumitani Minoru]WR[4p]BR[5p]DT[24.10.1963]EV[Oteai, 1963]SO[BiGo Assistant Full Edition]US[BiGo Assistant Full Edition]RE[B+Resign]
;B[ce]
;W[dc]
;B[fd]
;W[de]
;B[dd]
;W[ed]
;B[cd]
;W[ec]
;B[ee]
;W[df]
;B[cc]
;W[fc]
;B[ef]
;W[dg]
;B[eg]
;W[dh]
;B[gd]
;W[gc]
;B[eh]
;W[di]
;B[hc]
;W[hb]
;B[ib]
;W[cb]
;B[bb]
;W[hd]
;B[ic]
;W[ba]
;B[gb]
;W[fb]
;B[db]
;W[da]
;B[ca]C[Till now it's a joseki]
(;W[he]C[The losing move! -]
;B[fa]C[Correct punishment!]
;W[ga]
;B[eb]
;W[ea]
;B[fa]
;W[ea]
;B[gf]C[Black won ko fight in sente and answered the ko threat. Few moves later White resigned]
;W[hf]
;B[gg]
;W[hg]
;B[ei])
(;W[fe]
;B[ge]
;W[cb]C[This is the right ko threat]))
