[Computer-go] An unusual seki

Aja Huang ajahuang at gmail.com
Wed Aug 15 09:31:21 PDT 2012


This seki can be easily handled by forbidding White's self-atari at T9 and
S10, which are apparently bad moves because Black's S11 group has a solid
real eye at R16.

Aja

2012/8/15 Nick Wedd <nick at maproom.co.uk>

> Yesterday, a KGS game between Blubbel 3d and AyaBot4 2k, SGF file
> below, ended with an unusual kind of seki.  AyaBot4 marked its
> opponent's stones in the seki as dead, and was eventually booted
> by an admin for mis-marking stones (as a way of getting the game
> to end).  As all eleven AyaBots use the same IP address, they all
> got booted - and an hour later, all simultaneously tried to log in again.
>
> I mention this, both to explain to Hiroshi what happened to his
> bots, and because it is an interesting seki, of I type I had never
> seen before.
>
> Nick
>
>
> (;GM[1]FF[4]CA[UTF-8]AP[**CGoban:3]ST[2]
> RU[Chinese]SZ[19]HA[5]KM[0.50]**TM[600]OT[5x30 byo-yomi]
> PW[Blubbel]PB[AyaBot4]WR[3d]**BR[2k]DT[2012-08-14]PC[The KGS Go Server at
> http://www.gokgs.com/]C[**AyaBot4 <http://www.gokgs.com/%5DC%5BAyaBot4>[2k\]: GTP Engine for AyaBot4 (black): Aya version 7.42e : If you pass,
> AyaMC will pass. When AyaMC does not, please remove all dead stones.
> ]
> ;B[dd]BL[599.599]
> ;B[pd]BL[599.278]
> ;B[jj]BL[598.935]
> ;B[dp]BL[598.654]
> ;B[pp]BL[598.306]
> ;W[qn]WL[599.421]
> ;B[np]BL[596.887]
> ;W[qk]WL[598.258]
> ;B[ip]BL[595.687]
> ;W[lp]WL[596.32]
> ;B[kp]BL[594.405]
> ;W[lo]WL[594.002]
> ;B[lq]BL[593.188]
> ;W[mq]WL[592.372]
> ;B[mp]BL[592.019]
> ;W[kq]WL[590.811]
> ;B[lr]BL[591.069]
> ;W[jp]WL[585.719]
> ;B[ko]BL[589.498]
> ;W[jq]WL[576.457]
> ;B[jo]BL[588.011]
> ;W[mr]WL[573.518]
> ;B[ln]BL[586.867]
> ;W[mo]WL[572.06]
> ;B[mn]BL[585.458]
> ;W[no]WL[570.908]
> ;B[pn]BL[584.089]
> ;W[oo]WL[567.413]
> ;B[nn]BL[582.669]
> ;W[on]WL[560.432]
> ;B[om]BL[581.529]
> ;W[po]WL[558.796]
> ;B[kr]BL[580.282]
> ;W[jr]WL[555.794]
> ;B[pm]BL[578.814]
> ;W[qp]WL[548.661]
> ;B[qm]BL[577.793]
> ;W[qh]WL[544.178]
> ;B[qf]BL[576.209]
> ;W[io]WL[542.633]
> ;B[op]BL[574.787]
> ;W[qo]WL[540.749]
> ;B[rn]BL[573.321]
> ;W[ro]WL[538.87]
> ;B[ok]BL[572.134]
> ;W[in]WL[536.543]
> ;B[jm]BL[570.967]
> ;W[im]WL[534.421]
> ;B[il]BL[569.256]
> ;W[jl]WL[531.868]
> ;B[kl]BL[568.191]
> ;W[jn]WL[530.255]
> ;B[kn]BL[566.682]
> ;W[km]WL[529.03]
> ;B[ll]BL[565.35]
> ;W[oh]WL[521.982]
> ;B[nh]BL[563.782]
> ;W[og]WL[517.447]
> ;B[oi]BL[562.486]
> ;W[ng]WL[515.359]
> ;B[mg]BL[560.699]
> ;W[ni]WL[492.114]
> ;B[mh]BL[559.487]
> ;W[oj]WL[491.532]
> ;B[nj]BL[557.992]
> ;W[pi]WL[488.699]
> ;B[mi]BL[556.682]
> ;W[ik]WL[483.385]
> ;B[hl]BL[555.199]
> ;W[jk]WL[482.036]
> ;B[ij]BL[553.922]
> ;W[hk]WL[480.04]
> ;B[gl]BL[552.906]
> ;W[gk]WL[478.407]
> ;B[fk]BL[551.907]
> ;W[fl]WL[477.029]
> ;B[el]BL[550.55]
> ;W[fm]WL[475.577]
> ;B[em]BL[549.052]
> ;W[ek]WL[471.261]
> ;B[dk]BL[547.847]
> ;W[fj]WL[469.645]
> ;B[dj]BL[546.643]
> ;W[dq]WL[460.631]
> ;B[cq]BL[545.725]
> ;W[eq]WL[459.109]
> ;B[ep]BL[544.085]
> ;W[cr]WL[457.3]
> ;B[fp]BL[542.883]
> ;W[bq]WL[455.966]
> ;B[cp]BL[541.802]
> ;W[bp]WL[454.973]
> ;B[bo]BL[540.752]
> ;W[gr]WL[452.575]
> ;B[fn]BL[539.465]
> ;W[gn]WL[448.989]
> ;B[hp]BL[537.808]
> ;W[cf]WL[440.015]
> ;B[fc]BL[536.774]
> ;W[bd]WL[436.824]
> ;B[cc]BL[535.065]
> ;W[ci]WL[435.404]
> ;B[di]BL[534.013]
> ;W[bj]WL[432.975]
> ;B[gi]BL[532.818]
> ;W[fi]WL[416.985]
> ;B[fh]BL[531.688]
> ;W[gh]WL[416.032]
> ;B[hi]BL[530.258]
> ;W[eh]WL[415.031]
> ;B[fg]BL[529.417]
> ;W[ei]WL[414.198]
> ;B[dh]BL[528.432]
> ;W[eg]WL[412.854]
> ;B[gg]BL[527.023]
> ;W[ef]WL[409.783]
> ;B[cg]BL[525.867]
> ;W[bg]WL[408.034]
> ;B[bf]BL[524.529]
> ;W[bh]WL[403.186]
> ;B[ce]BL[522.728]
> ;W[df]WL[401.938]
> ;B[be]BL[521.808]
> ;W[cl]WL[398.665]
> ;B[dl]BL[520.422]
> ;W[cm]WL[396.907]
> ;B[dn]BL[519.207]
> ;W[fo]WL[395.097]
> ;B[en]BL[517.69]
> ;W[go]WL[393.291]
> ;B[br]BL[516.515]
> ;W[ar]WL[390.882]
> ;B[dr]BL[515.561]
> ;W[bs]WL[389.785]
> ;B[fq]BL[514.28]
> ;W[er]WL[388.674]
> ;B[fr]BL[513.124]
> ;W[ds]WL[387.87]
> ;B[cn]BL[511.635]
> ;W[gf]WL[375.574]
> ;B[bm]BL[510.575]
> ;W[bl]WL[373.001]
> ;B[am]BL[509.227]
> ;W[ai]WL[370.334]
> ;B[ap]BL[508.188]
> ;W[hg]WL[366.581]
> ;B[hh]BL[507.345]
> ;W[ff]WL[365.669]
> ;B[gh]BL[506.196]
> ;W[hf]WL[364.546]
> ;B[jh]BL[505.012]
> ;W[nc]WL[360.721]
> ;B[nd]BL[503.949]
> ;W[pc]WL[357.991]
> ;B[qc]BL[502.79]
> ;W[od]WL[355.262]
> ;B[oe]BL[501.996]
> ;W[oc]WL[354.415]
> ;B[md]BL[500.741]
> ;W[qd]WL[352.886]
> ;B[pe]BL[499.497]
> ;W[qb]WL[349.04]
> ;B[rc]BL[498.683]
> ;W[rb]WL[348.013]
> ;B[rd]BL[498.045]
> ;W[mc]WL[346.436]
> ;B[lc]BL[496.798]
> ;W[lb]WL[342.547]
> ;B[kc]BL[495.94]
> ;W[kb]WL[341.515]
> ;B[jc]BL[494.859]
> ;W[jb]WL[340.477]
> ;B[hc]BL[493.773]
> ;W[ic]WL[339.257]
> ;B[id]BL[492.944]
> ;W[ib]WL[338.293]
> ;B[jf]BL[491.682]
> ;W[hb]WL[335.898]
> ;B[gc]BL[490.451]
> ;W[gp]WL[332.161]
> ;B[gq]BL[489.594]
> ;W[ho]WL[328.497]
> ;B[hq]BL[488.663]
> ;W[ed]WL[318.979]
> ;B[hm]BL[487.378]
> ;W[ec]WL[311.079]
> ;B[fd]BL[486.128]
> ;W[db]WL[306.977]
> ;B[ee]BL[484.995]
> ;W[de]WL[304.243]
> ;B[cd]BL[483.928]
> ;W[fe]WL[301.373]
> ;B[cb]BL[482.932]
> ;W[fb]WL[300.273]
> ;B[pj]BL[482.07]
> ;W[oi]WL[289.406]
> ;B[pk]BL[481.069]
> ;W[qj]WL[287.968]
> ;B[rl]BL[480.173]
> ;W[rg]WL[283.271]
> ;B[ri]BL[479.029]
> ;W[rk]WL[275.974]
> ;B[pg]BL[477.947]
> ;W[rf]WL[270.285]
> ;B[re]BL[477.137]
> ;W[ne]WL[266.608]
> ;B[si]BL[476.159]
> ;W[of]WL[262.968]
> ;B[qi]BL[474.813]
> ;W[pf]WL[249.576]
> ;B[qe]BL[473.974]
> ;W[qg]WL[247.622]
> ;B[sf]BL[472.933]
> ;W[se]WL[239.677]
> ;B[sd]BL[471.819]
> ;W[sh]WL[236.271]
> ;B[rh]BL[470.766]
> ;W[sj]WL[230.812]
> ;B[sg]BL[469.929]
> ;W[ph]WL[229.406]
> ;B[ql]BL[469.325]
> ;W[mf]WL[218.345]
> ;B[ld]BL[468.416]
> ;W[mj]WL[216.358]
> ;B[nk]BL[467.321]
> ;W[kf]WL[215.548]
> ;B[kg]BL[466.438]
> ;W[lg]WL[203.023]
> ;B[lh]BL[465.742]
> ;W[lf]WL[199.749]
> ;B[je]BL[464.829]
> ;W[ki]WL[195.301]
> ;B[kh]BL[463.915]
> ;W[bb]WL[187.03]
> ;B[ba]BL[462.807]
> ;W[hr]WL[180.697]
> ;B[ir]BL[461.859]
> ;W[ks]WL[175.853]
> ;B[is]BL[460.556]
> ;W[kk]WL[170.667]
> ;B[lj]BL[459.258]
> ;W[kj]WL[167.172]
> ;B[ig]BL[458.371]
> ;W[sn]WL[161.129]
> ;B[sl]BL[457.498]
> ;W[da]WL[141.864]
> ;B[ca]BL[456.265]
> ;W[hd]WL[138.08]
> ;B[he]BL[455.64]
> ;W[ge]WL[134.377]
> ;B[gd]BL[455.014]
> ;W[gb]WL[133.418]
> ;B[hd]BL[454.396]
> ;W[if]WL[132.188]
> ;B[iq]BL[453.561]
> ;W[ls]WL[128.83]
> ;B[lk]BL[452.66]
> ;W[ji]WL[122.634]
> ;B[ii]BL[452.007]
> ;W[jd]WL[113.621]
> ;B[ie]BL[450.954]
> ;W[li]WL[107.351]
> ;B[ih]BL[450.032]
> ;W[ke]WL[100.091]
> ;B[kd]BL[449.426]
> ;W[lm]WL[94.731]
> ;B[nm]BL[448.706]
> ;W[ml]WL[92.034]
> ;B[mk]BL[448.065]
> ;W[mm]WL[90.273]
> ;B[fs]BL[447.205]
> ;W[es]WL[87.396]
> ;B[rm]BL[446.128]
> ;W[nl]WL[82.344]
> ;B[sb]BL[445.355]
> ;W[ol]WL[80.245]
> ;B[ag]BL[444.26]
> ;W[ra]WL[75.323]
> ;B[ch]BL[443.3]
> ;W[cj]WL[72.378]
> ;B[al]BL[442.403]
> ;W[ak]WL[70.849]
> ;B[ck]BL[441.264]
> ;W[bk]WL[69.86]
> ;B[dc]BL[440.587]
> ;W[ah]WL[67.088]
> ;B[ae]BL[439.879]
> ;W[af]WL[60.155]
> ;B[bc]BL[439.062]
> ;W[eo]WL[52.911]
> ;B[do]BL[438.337]
> ;W[ej]WL[45.856]
> ;B[gj]BL[437.658]
> ;W[pb]WL[38.279]
> ;B[dm]BL[436.922]
> ;W[ag]WL[32.972]
> ;B[dg]BL[436.278]
> ;W[aq]WL[30.263]
> ;B[ao]BL[435.619]
> ;W[js]WL[29.115]
> ;B[ab]BL[434.626]
> ;W[sa]WL[27.09]
> ;B[sc]BL[433.797]
> ;W[so]WL[23.959]
> ;B[sm]BL[432.924]
> ;W[jm]WL[17.358]
> ;B[pl]BL[432.229]
> ;W[hj]WL[3.861]
> ;B[lq]BL[431.429]
> ;W[lr]WL[1.668]
> ;B[qq]BL[430.674]
> ;W[rq]WL[30]OW[5]
> ;B[sp]BL[429.788]
> ;W[qr]WL[30]OW[5]
> ;B[nr]BL[428.871]
> ;W[pq]WL[30]OW[5]
> ;B[nq]BL[428.1]
> (;W[me]WL[30]OW[5]
> ;B[ac]BL[427.303]
> ;W[nf]WL[30]OW[5]
> ;B[gs]BL[426.632]
> ;W[]WL[30]OW[5]
> ;B[se]BL[425.863]
> ;W[]WL[30]OW[5]
> ;B[jd]BL[425.075]
> ;W[]WL[30]OW[5]
> ;B[mj]BL[424.25]
> ;W[]WL[30]OW[5]
> ;B[jg]BL[423.532]
> ;W[]WL[30]OW[5]
> ;B[sh]BL[422.716]
> ;W[]WL[30]OW[5]
> ;B[hs]BL[421.857]
> ;W[]WL[30]OW[5]
> ;B[ad]BL[421.223]
> ;W[]WL[30]OW[5]
> ;B[aa]BL[420.329]
> ;W[]WL[30]OW[5]
> ;B[bn]BL[419.603]
> ;W[]WL[30]OW[5]
> ;B[ps]BL[418.821]
> ;W[qs]WL[30]OW[5]
> ;B[hr]BL[418.008]
> ;W[]WL[30]OW[5]
> ;B[mb]BL[417.115]
> ;W[nb]WL[30]OW[5]
> ;B[oa]BL[416.353]
> ;W[ma]WL[30]OW[5]
> ;B[eb]BL[415.73]
> ;W[ea]WL[30]OW[5]
> ;B[ga]BL[414.872]
> ;W[fa]WL[30]OW[5]
> ;B[sr]BL[414.112]
> ;W[sq]WL[30]OW[5]
> ;B[rs]BL[413.454]
> ;W[rr]WL[30]OW[5]
> ;B[pr]BL[412.687]
> ;W[or]WL[30]OW[5]
> ;B[ns]BL[412.117]
> ;W[os]WL[30]OW[5]
> ;B[ms]BL[411.561]
> ;W[oq]WL[30]OW[5]
> ;B[np]BL[410.873]
> ;W[ss]WL[30]OW[5]
> ;B[nr]BL[410.247]
> ;W[nq]WL[30]OW[5]
> ;B[op]BL[409.601]
> ;W[ns]WL[30]OW[5]
> ;B[ka]BL[408.981]
> ;W[ja]WL[30]OW[5]
> ;B[ha]BL[408.452]
> ;W[ia]WL[30]OW[5]
> ;B[na]BL[407.777]
> ;W[pa]WL[30]OW[5]
> ;B[gm]BL[407.053]
> ;W[hn]WL[30]OW[5]
> ;B[hl]BL[406.531]
> ;W[gl]WL[30]OW[5]
> ;B[hm]BL[405.876]
> ;W[gm]WL[30]OW[5]
> ;B[mp]BL[405.157]
> ;W[pp]WL[30]OW[5]
> ;B[np]BL[404.5]
> ;W[op]WL[30]OW[5]
> ;B[ga]BL[403.96]
> ;W[ha]WL[30]OW[5]
> ;B[]BL[403.958]
> (;W[ob]WL[30]OW[5]
> ;B[oa]BL[403.469]
> ;W[na]WL[30]OW[5]
> ;B[]BL[403.468]
> (;W[rp]WL[30]OW[5]
> ;B[pr]BL[402.879]
> ;W[ps]WL[30]OW[5]
> ;B[]BL[402.877]
> ;W[mp]WL[30]OW[5]
> ;B[]BL[402.876]
> ;W[la]WL[30]OW[5]
> ;B[]BL[402.876]
> ;W[il]WL[30]OW[5]
> ;B[hl]BL[400.542]
> ;W[hm]WL[30]OW[5]
> ;B[]BL[400.541]
> (;W[]WL[30]OW[5]TW[ga][ka][oa]**[qa][eb][mb][ee][bi][aj][fk][**
> hl][np][sp][lq][qq][br][dr][**kr][nr][pr][sr][as][cs][ms][**
> rs]TB[bb][bd][qd][ke][le][me][**ne][kf][lf][mf][nf][of][pf][**
> rf][lg][ng][og][pg][qg][rg][**oh][ph][qh][ni][oi][pi][oj][**
> qj][rj][sj][qk][rk][sk][an][**co][gr])
> (;W[]WL[30]OW[5]TW[ga][ka][oa]**[qa][eb][mb][ee][bi][aj][fk][**
> hl][np][sp][lq][qq][br][dr][**kr][nr][pr][sr][as][cs][ms][**
> rs]TB[bb][bd][qd][ke][le][me][**ne][kf][lf][mf][nf][of][pf][**
> rf][lg][ng][og][pg][qg][rg][**oh][ph][qh][ni][oi][pi][oj][**
> qj][rj][sj][qk][rk][sk][an][**co][gr])
> (;W[]WL[30]OW[5]TW[ga][ka][oa]**[qa][eb][mb][ee][bi][aj][fk][**
> hl][np][sp][lq][qq][br][dr][**kr][nr][pr][sr][as][cs][ms][**
> rs]TB[bb][bd][qd][ke][le][me][**ne][kf][lf][mf][nf][of][pf][**
> rf][lg][ng][og][pg][qg][rg][**oh][ph][qh][ni][oi][pi][oj][**
> qj][rj][sj][qk][rk][sk][an][**co][gr])
> (;W[]WL[30]OW[5]TW[ga][ka][oa]**[qa][eb][mb][ee][bi][aj][fk][**
> hl][np][sp][lq][qq][br][dr][**kr][nr][pr][sr][as][cs][ms][**
> rs]TB[bb][bd][qd][ke][le][me][**ne][kf][lf][mf][nf][of][pf][**
> rf][lg][ng][og][pg][qg][rg][**oh][ph][qh][ni][oi][pi][oj][**
> qj][rj][sj][qk][rk][sk][an][**co][gr])
> (;W[]WL[30]OW[5]TW[ga][ka][oa]**[qa][eb][mb][sb][fc][gc][hc][**
> jc][kc][lc][qc][rc][sc][fd][**gd][hd][id][jd][kd][ld][md][**
> nd][pd][qd][rd][sd][ee][he][**ie][je][ke][le][me][ne][oe][**
> pe][qe][re][se][jf][kf][lf][**mf][nf][of][pf][qf][rf][sf][**
> fg][gg][ig][jg][kg][lg][mg][**ng][og][pg][qg][rg][sg][fh][**
> gh][hh][ih][jh][kh][lh][mh][**nh][oh][ph][qh][rh][sh][bi][**
> gi][hi][ii][mi][ni][oi][pi][**qi][ri][si][aj][gj][ij][jj][**
> lj][mj][nj][oj][pj][qj][rj][**sj][fk][lk][mk][nk][ok][pk][**
> qk][rk][sk][hl][kl][ll][pl][**ql][rl][sl][nm][om][pm][qm][**
> rm][sm][kn][ln][mn][nn][pn][**rn][jo][ko][kp][np][sp][lq][**
> qq][br][dr][kr][nr][pr][sr][**as][cs][ms][rs]TB[bb][bd][an][**co][gr]C[AyaBot4
> [2k\]: You and the engine seem to disagree about which stones are dead. To
> solve this problem, you can press "undo", play until all dead stones are
> removed from the board, then score again.
> ]))
> (;W[]WL[30]OW[5]TW[ga][ka][la]**[oa][qa][eb][mb][ee][bi][aj][**
> fk][hl][il][hm][br][dr][as][**cs]TB[bb][bd][qd][ke][le][me][**
> ne][kf][lf][mf][nf][of][pf][**rf][lg][ng][og][pg][qg][rg][**
> oh][ph][qh][ni][oi][pi][oj][**qj][rj][sj][qk][rk][sk][an][**
> on][qn][sn][co][lo][mo][no][**oo][po][qo][ro][so][jp][lp][**
> mp][op][pp][qp][rp][jq][kq][**lq][mq][nq][oq][pq][qq][rq][**
> sq][gr][jr][kr][lr][mr][nr][**or][pr][qr][rr][sr][js][ks][**
> ls][ms][ns][os][ps][qs][rs][**ss]C[AyaBot4 [2k\]: You and the engine seem
> to disagree about which stones are dead. To solve this problem, you can
> press "undo", play until all dead stones are removed from the board, then
> score again.
> Blubbel [3d\]: SEKI
> ]))
> (;W[]WL[30]OW[5]TW[ga][ka][la]**[na][oa][qa][eb][mb][ob][ee][**
> bi][aj][fk][hl][il][hm][mp][**np][rp][sp][lq][qq][br][dr][**
> kr][nr][pr][sr][as][cs][ms][**ps][rs]TB[bb][bd][qd][ke][le][**
> me][ne][kf][lf][mf][nf][of][**pf][rf][lg][ng][og][pg][qg][**
> rg][oh][ph][qh][ni][oi][pi][**oj][qj][rj][sj][qk][rk][sk][**an][co][gr]C[Blubbel
> [3d\]: why doesn't it see the seki?
> Blubbel [3d\]: fuck...
> AyaBot4 [2k\]: You and the engine seem to disagree about which stones are
> dead. To solve this problem, you can press "undo", play until all dead
> stones are removed from the board, then score again.
> ]))
> (;W[]WL[30]OW[5]
> ;B[]BL[428.099]TW[ea][fa][ga][**ha][ia][ja][ka][la][ma][na][**
> oa][pa][qa][eb][mb][nb][ob][**ee][bi][aj][fk][gl][hl][il][**
> gm][hm][hn][mp][np][op][pp][**rp][sp][lq][nq][oq][qq][sq][**
> br][dr][kr][nr][or][pr][rr][**sr][as][cs][ms][ns][os][ps][**
> qs][rs][ss]TB[aa][bb][ac][ad][**bd][jd][qd][ke][le][me][ne][**
> se][kf][lf][mf][nf][of][pf][**rf][jg][lg][ng][og][pg][qg][**
> rg][oh][ph][qh][sh][ni][oi][**pi][mj][oj][qj][rj][sj][qk][**
> rk][sk][an][bn][co][gr][hr][**gs][hs]))
>
> --
> Nick Wedd
> nick at maproom.co.uk
> ______________________________**_________________
> Computer-go mailing list
> Computer-go at dvandva.org
> http://dvandva.org/cgi-bin/**mailman/listinfo/computer-go<http://dvandva.org/cgi-bin/mailman/listinfo/computer-go>
>
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