[gnugo-devel] 4 stones 9x9

[Wolfgang Manner]

Evan Daniels had the bright idea to look at 4 stone games at the 9x9 board.
First i thought this is impossible, but finally it turned out to be
easier than i thought. Usually already the very first move played by
gnugo is "the losing move". maybe not in the sense that it is really bad,
but then the follow up gets too difficult for gnugo.

Eventually i forced gnugo to play 2 moves. after that i was unable to win.
of course this doesnt mean anything, but i would like to challenge
people to load this "fuseki" and see if they can win after that.
i suspect it is still possible, but it would be nice to see it.
You are welcome to criticise  my game, i can see various moves which were
HEAVY.

good luck
wolfgang


here are the games:


The first black move E3 is not really bad, but then A2 gets gnugo into trouble


(;GM[1]FF[3]
SZ[9]
GN[GNU Go 3.4 Random Seed 1071941284 level 10]
DT[2003-12-20]
KM[0]AP[GNU Go:3.4]RU[Japanese]HA[4]AB[cc][gc][cg][gg]
RE[W+24.0]
;W[eh];B[eg];W[ce];B[bd];W[bh];B[bg];W[ch];B[ah];W[dg];B[df];W[dh];
B[fg];W[cf];B[bf];W[be];B[ae];W[de];B[ef];W[ee];B[fh];W[dc];B[db];
W[cd];B[bb];W[eb];B[ec];W[ed];B[af];W[fc];B[gb];W[da];B[cb];W[gd];
B[hd];W[ge];B[he];W[hf];B[gf];W[hg];B[fe];W[fd];B[ei];W[bi];B[fb];
W[hh];B[di];W[gh];B[fi];W[gi];B[ea];W[fa];B[ga];W[ff];B[ea];W[ad];
B[ac];W[fa];B[fe];W[hc];B[hb];W[ff];B[ie];W[if];B[fe];W[id];B[ag];
W[ff];B[ea];W[ci];B[ec];W[ai];B[ad];W[eb];B[fa];W[ec];B[ib];W[ic];
B[tt];W[tt];B[tt]
)

Here G5 and D5 are maybe ok, in the middle black passes !


(;GM[1]FF[3]
SZ[9]
GN[GNU Go 3.4 Random Seed 1072007341 level 10]
DT[2003-12-21]
KM[0]AP[GNU Go:3.4]RU[Japanese]HA[4]AB[cc][gc][cg][gg]
RE[W+15.0]
;W[eg];B[ge];W[be];B[de];W[bh];B[cf];W[ch];B[bf];W[af];B[ag];W[ae];
B[bg];W[ce];B[dg];W[dh];B[ah];W[ee];B[dd];W[ff];B[df];W[gf];B[hf];
W[he];B[hd];W[hg];B[hh];W[if];B[fh];W[eh];B[fd];W[ed];B[ec];W[fe];
B[gh];W[gd];B[hc];W[fc];B[fb];W[fd];B[db];W[ih];B[id];W[ie];B[bi];
W[ci];B[ai];W[bc];B[ef];W[fg];B[tt];W[ac];B[cd];W[cb];B[bd];W[ad];
B[dc];W[gb];B[ea];W[hb];B[ga];W[ha];B[bb];W[fa];B[ab];W[eb];B[da];
W[fb];B[tt];W[tt];B[tt]
)

Here E4 is no good, it is too agressive


(;GM[1]FF[3]
SZ[9]
GN[GNU Go 3.4 Random Seed 1071586744 level 10]
DT[2003-12-16]
KM[0]AP[GNU Go:3.4]RU[Japanese]HA[4]AB[cc][gc][cg][gg]
RE[W+8.0]
;W[eg];B[ef];W[ce];B[eh];W[ge];B[fd];W[bh];B[bg];W[ch];B[fg];W[dg];
B[dh];W[df];B[bf];W[bc];B[bb];W[bd];B[ac];W[ee];B[ff];W[fe];B[ed];
W[dd];B[hd];W[dc];B[cb];W[fc];B[ec];W[eb];B[fb];W[gd];B[ad];W[fc];
B[gb];W[be];B[ah];W[bi];B[ag];W[ae];B[di];W[fh];B[gh];W[cf];B[he];
W[hf];B[gf];W[ca];B[ea];W[da];B[fa];W[db];B[fi];W[af];B[ci];W[ai];
B[tt];W[tt];B[tt]
)




(;GM[1]FF[3]
SZ[9]
GN[GNU Go 3.4 Random Seed 1072459002 level 10]
DT[2003-12-26]
KM[0]AP[GNU Go:3.4]RU[Japanese]HA[4]AB[cc][gc][cg][gg]
RE[W+14.0]
;W[eh];B[eg];W[ce];B[bd];W[bh];B[bg];W[ch];B[ah];W[dg];B[df];W[dh];
B[fg];W[cf];B[bf];W[fd];B[gd];W[fc];B[ee];W[de];B[ef];W[dd];B[ed];
W[dc];B[ec];W[db];B[cb];W[be];B[ae];W[eb];B[gb];W[fb];B[ab];W[fe];
B[ba];W[ge];B[he];W[ga];B[hb];W[hf];B[id];W[hg];B[hh];W[gf];B[gh];
W[ih];B[ha];W[fh];B[fa];W[fi];B[af];W[gi];B[if];W[hi];B[ie];W[bc];
B[ig];W[ff];B[hc];W[ea];B[ga];W[ca];B[cd];W[ac];B[da];W[ic];B[ib];
W[ca];B[ad];W[bi];B[ag];W[da];B[bb];W[ai];B[tt];W[tt];B[tt]
)


Here gnugo plays tengen. i guess this is a good move.


(;GM[1]FF[3]
SZ[9]
GN[GNU Go 3.4 Random Seed 1072693155 level 10]
DT[2003-12-29]
KM[0]AP[GNU Go:3.4]RU[Japanese]HA[4]AB[cc][gc][cg][gg]
RE[W+13.0]
;W[eg];B[ee];W[ce];B[be];W[eb];B[cb];W[bd];B[cd];W[bf];B[bg];W[cf];
B[af];W[ae];B[ag];W[ef];B[df];W[de];B[dg];W[ed];B[fe];W[dd];B[bc];
W[dh];B[ad];W[ac];B[fb];W[ch];B[ec];W[dc];B[db];W[fd];B[gd];W[ff];
B[ge];W[fc];B[ea];W[bh];B[ab];W[gb];B[fa];W[gf];B[hf];W[he];B[eh];
W[ah];B[hd];W[hg];B[ie];W[gh];B[ig];W[hh];B[ih];W[hi];B[ad];W[ga];
B[da];W[ac];B[ec];W[ad];B[if];W[eb];B[hb];W[ec];B[ii];W[tt];B[tt]
)


(;GM[1]FF[3]
SZ[9]
GN[GNU Go 3.4 Random Seed 1073842079 level 10]
DT[2004-01-11]
KM[0]AP[GNU Go:3.4]RU[Japanese]HA[4]AB[cc][gc][cg][gg]
RE[W+7.0]
;W[eg];B[ge];W[ce];B[dh];W[fd];B[gd];W[ff];B[bd];W[gf];B[hf];W[bh];
B[fe];W[ee];B[df];W[ef];B[dg];W[de];B[bf];W[be];B[ed];W[bg];B[ae];
W[cf];B[af];W[eh];B[dd];W[di];B[fh];W[fi];B[gh];W[gi];B[hi];W[ei];
B[hh];W[cd];B[bc];W[ad];B[ac];W[ag];B[ad];W[dc];B[ec];W[db];B[eb];
W[cb];B[da];W[ba];B[fg];W[ch];B[ea];W[bb];B[ca];W[tt];B[tt]
)


Now the forced "fuseki" . please let me know, how you won that one.


(;GM[1]FF[4]
SZ[9]
GN[GNU Go 3.4 Random Seed 1073928397 level 10]
DT[2004-01-12]
KM[0.0]AP[GNU Go:3.4]RU[Japanese]HA[4]AB[cc][gc][cg][gg]
;W[eg]
;B[he]C[forced];W[ce]
;B[eb]C[forced])