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[gnugo-devel] nasty shape values


From: Paul Pogonyshev
Subject: [gnugo-devel] nasty shape values
Date: Sat, 22 Feb 2003 18:32:34 +0200
User-agent: KMail/1.4.3

shape values can sometimes give really strange results. in the
game below at move 203 gnu go (black) chose a move which is 6-7
points worse than the obvious one. the mistake was caused by
CB328 pattern with shape value of +10.

Paul

(;GM[1]FF[3]
RU[Japanese]SZ[19]HA[0]KM[5.5]
PW[Paul]
PB[GNU Go 3.3.16]
DT[2003-02-22]
RE[W+40.5]
;B[pd];W[pp];B[dd];W[dq];B[co];W[ep];B[dm];W[fc];B[pn];W[np];B[pj];
W[jq];B[qp];W[qq];B[qo];W[rq];B[fd];W[gd];B[fe];W[ec];B[dc];W[jc];
B[df];W[dk];B[ci];W[cl];B[cm];W[fk];B[bq];W[fn];B[nn];W[lo];B[lm];
W[qf];B[pf];W[qe];B[pe];W[qd];B[jn];W[io];B[nc];W[ld];B[lb];W[qi];
B[qj];W[ri];B[jl];W[di];B[dh];W[ei];B[pi];W[cj];B[bi];W[ge];B[qh];
W[rh];B[qg];W[rg];B[kh];W[lf];B[mg];W[eh];B[dg];W[pc];B[oc];W[pb];
B[ij];W[jg];B[cr];W[dr];B[db];W[ff];B[ga];W[hi];B[gc];W[gb];B[hc];
W[hb];B[gf];W[hf];B[he];W[gg];B[hd];W[ic];B[gf];W[ge];B[ob];W[kb];
B[pa];W[qb];B[ie];W[fa];B[kc];W[lc];B[kd];W[ke];B[jd];W[je];B[id];
W[if];B[gd];W[jb];B[mb];W[eb];B[rl];W[cq];B[br];W[cp];B[bp];W[do];
B[bn];W[da];B[cb];W[ji];B[lj];W[jj];B[ik];W[jk];B[hm];W[kl];B[ho];
W[in];B[im];W[hn];B[kk];W[mf];B[km];W[ng];B[nf];W[ne];B[nd];W[of];
B[og];W[oh];B[pg];W[mh];B[ph];W[li];B[mj];W[jo];B[rp];W[bj];B[aj];
W[ak];B[ai];W[bl];B[ko];W[kp];B[kn];W[mo];B[sq];W[sr];B[sp];W[rs];
B[ds];W[es];B[cs];W[fr];B[ca];W[ea];B[kj];W[ki];B[dn];W[en];B[ed];
W[ha];B[qa];W[ra];B[oa];W[rc];B[ni];W[nh];B[oo];W[op];B[oe];W[nf];
B[rj];W[hj];B[gm];W[gn];B[ef];W[fg];B[bm];W[sj];B[sk];W[si];B[oi];
W[md];B[mn];W[ii];B[hk];W[gk];B[gl];W[el];B[ka];W[ja];B[la];W[am];
B[an];W[al];B[gf];W[il];B[ll];W[hl];B[ge];W[em];B[po];W[no];B[dl];
W[mi];B[mc];W[eg];B[ln];W[fl];B[jm];W[fm];B[tt];W[tt];
TW[ga][ia][sa][fb][ib][rb][sb][qc][sc][rd][sd][le][me][re][se][jf][kf][rf][sf][hg][ig][kg][lg][mg][sg][fh][gh][hh][ih][jh][kh][lh][sh][fi][gi][dj][ej][fj][gj][ij][bk][ck][ek][hk][ik][eo][fo][go][ho][dp][fp][gp][hp][ip][jp][lp][mp][eq][fq][gq][hq][iq][kq][lq][mq][nq][oq][pq][er][gr][hr][ir][jr][kr][lr][mr][nr][or][pr][qr][rr][fs][gs][hs][is][js][ks][ls][ms][ns][os][ps][qs][ss]
TB[aa][ba][ma][na][ab][bb][nb][ac][bc][cc][ad][bd][cd][od][ae][be][ce][de][ee][af][bf][cf][ag][bg][cg][ah][bh][ch][nj][oj][lk][mk][nk][ok][pk][qk][rk][kl][ml][nl][ol][pl][ql][sl][mm][nm][om][pm][qm][rm][sm][cn][on][qn][rn][sn][ao][bo][ro][so][ap][aq][ar][as][bs]
C[The game is over.  Final score:
   White = 94 territory + 10 captures + 5.5 komi = 109.5
   Black = 65 territory + 4 captures = 69
White wins by 40.5.
]
)





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