(;GM[1]FF[3]
VieW[]
SO[]
EV[]
PC[]
DT[May 16-18, 1842]
RE[]
TM[]KM[0]BR[]WR[]
PB[Shuwa]
PW[Genan]
SZ[19]
PL[1];B[qd];W[oc];B[ec];W[pf];B[od];W[nd];B[oe];W[pc];
B[qe];W[qc];B[qi];W[de];B[cd];W[ce];B[bd];W[mf];B[of];W[gc];B[fc];
W[gd];B[ee];W[do];B[cj];W[di];B[ci];W[dh];B[cm];W[fe];B[ef];W[ff];
B[eg];W[fg];B[eh];W[fh];B[ei];W[dj];B[dk];W[ej];B[fi];W[dl];B[ek];
W[fj];B[gi];W[dd];B[dc];W[ck];B[el];W[bk];B[ch];W[cg];B[dg];W[fl];
B[fk];W[gj];B[bg];W[cf];B[ed];W[dm];B[em];W[dn];B[gl];W[hj];B[hi];
W[ij];B[il];W[jf];B[jh];W[kj];B[gn];W[oi];B[hg];W[qj];B[rj];W[qh];
B[pj];W[pi];B[qk];W[ri];B[ie];W[if];B[hf];W[jd];B[hd];W[hc];B[me];
W[lf];B[ne];W[md];B[le];W[kd];B[kf];W[kg];B[ke];W[je];B[jg];W[kh];
B[rc];W[rb];B[rh];W[qj];B[ld];W[lc];B[qi];W[bh];B[bi];W[qj];B[mc];
W[nc];B[qi];W[bf];B[ah];W[qj];B[kc];W[mb];B[qi];W[af];B[cl];W[bm];
B[ki];W[qj];B[lb];W[mc];B[qi];
C[Now the situation becomes complicated beyond the point of mortal understanding, since in addition to the ko on the right, White is trying to revive his dead stones on the left. If they live, White does not need to worry about eyes in the center.]
W[ag];B[lj];W[qj];B[ic];W[jc];B[qi];W[li];B[ji];W[qj];B[ib];W[id];
B[qi];W[mj];B[lk];W[qj];B[he];W[jb];B[qi];W[mh];B[si];W[oj];B[ok];
W[mk];B[pq];W[jj];B[ll];W[ol];B[eq];W[cq];B[mp];W[bh];B[gp];W[nk];
B[mn];W[gq];B[fq];W[hp];B[hq];W[mq];B[nq];W[lp];
C[As is traditional, the captured stone is removed from the board.]
B[gr];W[nr];B[np];W[kq];B[or];W[lr];B[jr];W[ln];B[lm];W[jq];B[pk];
W[nm];B[lo];W[ko];B[kn];W[jo];B[ns];W[mr];B[pm];W[on];B[pn];W[bc];
B[cc];C[At long last, White takes the chance to eliminate the ko
aji.]
W[ai];B[ir];W[kr];B[cr];W[ad];B[bb];W[br];B[dr];W[ab];B[ac];W[oo];
B[pl];W[bc];B[ca];W[qg];B[og];W[ph];B[rg];W[fb];B[ac];W[op];B[oq];
W[bc];B[eb];W[nn];B[gb];W[hb];B[fa];W[rd];B[re];W[sc];B[cp];W[bp];
B[dp];W[co];B[ip];W[jp];B[in];W[fo];B[fn];W[eo];B[ho];W[ac];B[kk];
W[qf];B[rf];W[jn];B[jm];W[ps];B[os];W[qo];B[po];W[qq];B[pp];W[qr];
B[rn];W[ro];
C[White is dead in the corner. It is unknown whether Genan knew the invasion was doomed, or whether he made a misreading. According to one theory, Genan knew that he was slightly behind and invaded hoping for a Black mistake. Of course, the failed invasion made Black's lead larger, and after a few more moves, Black won by 6 points.]
B[so]PL[2]
(;W[cs];B[ds];W[bs];B[se];W[jk];B[jl];W[gk];B[hk];W[en];B[fm];W[no];
B[mo];W[js];B[is];W[ks];B[sd];W[rc];B[ms];W[ba];B[aa];W[sp];B[qp];
W[ba];B[cb];W[ae])

(;W[sp];B[qp];W[rp];B[sr];W[rr];B[sq];W[ss]PL[2];B[qs])

)