GPW(Game Programming Workshop) was held 10th-12th November 2006 in Hakone, Japan. And Youhei Yano reported the maximum number of strings in 19x19 is 277.
19 O . O X O . O X O . O X O . O X O . O 18 X O X . X O X . X O X . X O X . X O X 17 . X O X O . O X . X O X O . O X O X . 16 X O . O X . X O X O . O X O X O . O X 15 O X . X O X O . O X O X . X . X O X . 14 . O X O . O X O X . X O X O X . X O X 13 O X O . O X . X O X O . O . O X O . O 12 X . X O X O X O . O X O X . X O X . X 11 O X O X . . O X O X . X O X O . O X O 10 . O . O X O X . X O X O . O X O X O . 9 O X O X . X O X O . O X O X . X . X O 8 X . X O X O . O X O X . X O X O . O X 7 O X O . O X O X . X O X O . O X O X . 6 . O X O X . X O X O . O X O X . X O X 5 O X . X O X O . O X O X . X O X O . O 4 X O . O . O X O X . X O X O . O . O X 3 . X O X O X . X O X O . . X O X O X . 2 X O X . X O X O . O X O X O X . X O X 1 O . O X O . O X . X . X O . O X O . O A B C D E F G H J K L M N O P Q R S T I tested some strong Go programs. And there was no Go program that could handle this position :-) Some crashed, and some could not load. I tested Gnugo, KCC(Ginsei Igo5), Go4++(Tsuyoi Igo4), Handtalk(ShudanTaikyoku3), Many Faces(AI Igo2004), Haruka, and FunGo. (I don't know whether it is because of GUI or engine.) Hiroshi Yamashita (;GM[1]SZ[19] ;B[da];W[aa];B[ha];W[ca];B[la];W[ea];B[pa];W[ga];B[ab];W[ia];B[cb];W[ka] ;B[eb];W[ma];B[gb];W[oa];B[ib];W[qa];B[kb];W[sa];B[mb];W[bb];B[ob];W[fb] ;B[qb];W[jb];B[sb];W[nb];B[bc];W[rb];B[dc];W[cc];B[hc];W[ec];B[jc];W[gc] ;B[lc];W[kc];B[pc];W[mc];B[rc];W[oc];B[ad];W[qc];B[ed];W[bd];B[gd];W[dd] ;B[id];W[hd];B[md];W[jd];B[od];W[ld];B[sd];W[nd];B[be];W[pd];B[de];W[rd] ;B[fe];W[ae];B[je];W[ee];B[le];W[ge];B[ne];W[ie];B[pe];W[ke];B[re];W[qe] ;B[cf];W[bf];B[gf];W[df];B[if];W[ff];B[kf];W[hf];B[mf];W[lf];B[of];W[nf] ;B[qf];W[rf];B[sf];W[ag];B[bg];W[cg];B[fg];W[eg];B[hg];W[ig];B[jg];W[kg] ;B[pg];W[mg];B[ah];W[og];B[ch];W[qg];B[eh];W[sg];B[gh];W[dh];B[kh];W[fh] ;B[mh];W[hh];B[oh];W[jh];B[qh];W[lh];B[sh];W[ph];B[bi];W[ai];B[di];W[ci] ;B[hi];W[gi];B[ji];W[ii];B[li];W[mi];B[ni];W[oi];B[ri];W[qi];B[ej];W[si] ;B[gj];W[bj];B[ij];W[dj];B[kj];W[fj];B[oj];W[jj];B[qj];W[lj];B[bk];W[nj] ;B[dk];W[pj];B[fk];W[rj];B[hk];W[ak];B[lk];W[ck];B[nk];W[gk];B[pk];W[ik] ;B[rk];W[kk];B[al];W[mk];B[cl];W[sk];B[el];W[dl];B[il];W[fl];B[kl];W[hl] ;B[ml];W[jl];B[ol];W[nl];B[sl];W[pl];B[bm];W[rl];B[fm];W[am];B[hm];W[cm] ;B[jm];W[em];B[lm];W[gm];B[pm];W[km];B[rm];W[mm];B[cn];W[om];B[en];W[qm] ;B[gn];W[bn];B[in];W[dn];B[mn];W[hn];B[on];W[jn];B[qn];W[ln];B[sn];W[nn] ;B[bo];W[rn];B[do];W[ao];B[fo];W[eo];B[jo];W[go];B[lo];W[io];B[no];W[ko] ;B[po];W[oo];B[ap];W[qo];B[gp];W[so];B[ip];W[bp];B[kp];W[dp];B[mp];W[fp] ;B[sp];W[hp];B[bq];W[lp];B[dq];W[np];B[fq];W[pp];B[hq];W[rp];B[jq];W[cq] ;B[nq];W[eq];B[pq];W[iq];B[rq];W[kq];B[ar];W[oq];B[cr];W[qq];B[er];W[br] ;B[gr];W[fr];B[kr];W[hr];B[mr];W[jr];B[or];W[lr];B[qr];W[nr];B[sr];W[rr] ;B[ds];W[as];B[hs];W[cs];B[js];W[es];B[ls];W[gs];B[ps];W[ms];B[tt];W[os] ;B[tt];W[qs];B[tt];W[ss]) _______________________________________________ computer-go mailing list computer-go@computer-go.org http://www.computer-go.org/mailman/listinfo/computer-go/
