computer-go: Multiple sekis...

[Tom Johnson <tom@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>]

Hi All,
  In light of the recent discussion about tsumego.  I was wondering how 
people deal with neighboring seki's.  I'm thinking in particular of a game 
I observed on IGS a while back.  Unfortunately, I don't seem to have a 
reference for who the players were. (Anyone know?)  But below is the 
final state of the board.  How good are the different computer go players 
at analyzing the life/death statuses on this board?  Is this a more 
challenging problem than the more usual seki?  There's no "outside".  
Every group on the board is locked into one big seki.  If, say, white 
misses it and lets one group get captured, ALL of white's stones are 
captured.

   A B C D E F G H J K L M N O P Q R S T
19 O . X X X O O O O . O . X O O O . O . 
18 . O O X X X X O O O X X X X O . O X X
17 X O X X . X O O O O O O O X O O O O X
16 X X O O X X O X X O X X O X O X X X X
15 X X O O O O X X X X . X O X X . X O X
14 . X X O . X X X O O X X O X O X X O O
13 O X O O O O O O O X X O O O O O X X O
12 O O X X X O X . O O X X O . O O X O O
11 O O X X X O O O O X X . X O O X O O X
10 O . O X X O X O X X X X X O O X . . X
 9 O O O X X X X X O X O X X O X X X X X
 8 X O X . X X O O O O O O X X O O O O O
 7 X X X X X O O O O X . O O X O . . X O
 6 X X O O X O O X X X O O X O O X X X X
 5 X O O . X O O O X X O O X X X O O O O
 4 X X O X X O X O O X . O O X . O X O .
 3 X O O X O X X X X X O O X X O O X O O
 2 X X O O O X X X O X O . O X X O X X X
 1 X O O . O X . X O O O O O X . X . . .

I'll also attach an sgf file since this is quite a bit to look at in 
ascii (also in case I made an error above in transcribing).

-Tom
(;GM[1]FF[3]
SZ[19]KM[5.5]
PW[Bitecat*]
WR[5d]
PB[Bluesky*]
BR[5d]
DT[2000-05-24]
SY[Cgoban 1.9.2];B[pd];W[dd];B[dp];W[pp];B[nq];W[lq];B[no];W[lo];B[pn]
;W[on];B[oo];W[po];B[qn];W[nn];B[mn];W[mm];B[mo];W[ln];B[or];W[pr];
B[lr];W[kr];B[mq];W[mp];B[np];W[lp];B[qr];W[pq];B[ps];W[rq];B[qq];
W[rp];B[rm];W[ro];B[nm];W[om];B[nl];W[ol];B[ok];W[pl];B[pk];W[ql];
B[qk];W[nk];B[ml];W[lm];B[mk];W[rl];B[rk];W[sm];B[sn];W[sl];B[rn];
W[so];B[sk];W[qo];B[rr];W[mr];B[nr];W[ls];B[sr];W[sq];B[fc];W[cg];
B[cl];W[gd];B[fd];W[fe];B[ge];W[gc];B[gb];W[hb];B[eb];W[ga];B[fb];
W[ic];B[id];W[kc];B[he];W[hc];B[kd];W[lc];B[ff];W[ee];B[dc];W[bc];
B[bd];W[cd];B[cc];W[bb];B[be];W[cb];B[ed];W[de];B[db];W[fg];B[cf];
W[dg];B[bg];W[bh];B[ch];W[ag];B[bf];W[bi];B[ci];W[cj];B[eh];W[eg];
B[dj];W[ck];B[dk];W[bl];B[bj];W[bk];B[aj];W[ak];B[bm];W[ai];B[cm];
W[hg];B[gh];W[fh];B[di];W[gg];B[jg];W[da];B[ea];W[aa];B[ac];W[ad];
B[ca];W[ha];B[da];W[fa];B[ae];W[df];B[ad];W[ce];B[am];W[ah];B[bj];
W[aj];B[al];W[nj];B[mj];W[ni];B[mi];W[mh];B[lh];W[mg];B[ki];W[me];
B[lf];W[mf];B[ld];W[md];B[nc];W[mc];B[mb];W[jf];B[kf];W[if];B[ie];
W[jh];B[kh];W[ih];B[ij];W[hj];B[hk];W[ik];B[jk];W[il];B[ji];W[ii];
B[jj];W[jl];B[gj];W[hi];B[fk];W[gi];B[gf];W[fj];B[gk];W[kk];B[lj];
W[ll];B[kj];W[ke];B[le];W[jd];B[je];W[jc];B[ej];W[fi];B[kg];W[qi];
B[pi];W[ph];B[qh];W[ri];B[pj];W[oh];B[qg];W[fp];B[qe];W[rf];B[qf];
W[rh];B[rg];W[sg];B[si];W[re];B[rd];W[sf];B[sj];W[sh];B[sd];W[oi];
B[se];W[oj];B[fq];W[ob];B[nb];W[qc];B[qd];W[oc];B[nd];W[pc];B[oa];
W[pa];B[rb];W[rc];B[sc];W[qb];B[ne];W[ra];B[sb];W[na];B[lb];W[od];
B[oe];W[of];B[nf];W[ng];B[pf];W[og];B[ja];W[ka];B[kb];W[jb];B[ia];
W[eq];B[ep];W[gq];B[fr];W[er];B[gp];W[fo];B[gr];W[cq];B[hq];W[fm];
B[en];W[fn];B[hn];W[cp];B[em];W[hm];B[gm];W[gl];B[fl];W[gn];B[in];
W[dl];B[ek];W[ir];B[jq];W[ho];B[jr];W[js];B[io];W[hp];B[iq];W[ip];
B[jp];W[go];B[jm];W[im];B[jn];W[kq];B[eo];W[gm];B[hs];W[is];B[lk];
W[kl];B[dq];W[dr];B[br];W[cr];B[ao];W[ap];B[bp];W[bq];B[aq];W[bo];
B[ap];W[cn];B[bn];W[co];B[dm];W[ar];B[as];W[cs];B[an];W[es];B[ns];
W[ms];B[fs];W[ks];B[hr];W[ko];B[jo];W[oq];B[qp];W[ib];B[ja];W[ia];
B[ma];W[pg];B[hd];W[oa];B[ei];W[ig];B[dh];W[lg];B[hf];W[kn];B[el];
W[hl];B[gq];W[bs];B[ar];W[dn]
)