(;
GM[1]FF[4]VW[]AP[Many Faces of Go:10.0]
SZ[13]
HA[0]
ST[1]
PB[Bronyslaw Przybyla's program]
PW[Richard Granville's program]
PC[Computer Go Championship. Acornsoft, London.]
KM[6.0]
RE[B+14]
SO[BGJ61. March 1984. Page 23.]

C[Copyright British Go Association 1984,1999 

];B[ck]
C[The world's first Computer Go tournament was held in January
at the Covent Garden officesof Acornsoft Ltd.  Games were played
on 13*13 boards, and the programs all ran on BBC microcomputers
(no peripheral memory was allowed). 

The winner of the £1000 first prize was Bronyslaw Przbyla, from
Swindon.  Most of the eight programs competing played something
looking quite like 25 kyu human play, but his was the best at
avoiding worthless moves. 

The final game is given below, with brief comments by Matthew
Macfadyen, who was one of the referees at the tournament.  
];W[jk];B[kc];W[cd];B[gk];W[ek];B[ej];W[dj]
;B[dk];W[el];B[di];W[dl];B[cl];W[fj];B[ei];W[fk];B[gl]
C[Black 17 creates a very tense situation - neither program explicitly
recognises eyes, so one of the groups on the side is likely to
die.  
];W[cg]
C[White 18: White has no idea that his group is in trouble.  
]
;B[gi]
C[Black 19: Przybyla's program looks for ways in which groups can
extend towards the centre, and finds 19 because it was the only
way for white to extend.  Having played here, however, it loses
interest until the group is down to 2 or 3 liberties.  
];W[fi];B[fh];W[eh];B[cj]
C[Black 23: He knows about ladders, and spots that white 8(A) can't
be killed in one any more.  

]LB[dj:A]
;W[gj];B[gh];W[dh];B[hj];W[eg]
;B[ch]
C[Black 29:  Lucky.  As long as black 31(A) has not been played,
the three stones 7, 11 and 15 have only two liberties and Black
will not 'see' that the big white group has only three.  After
31, though, he can 'see' white's danger, and adds another stone
at 33(B), so that he can prove that white is dead.  
]LB[ci:A][ej:7][di:11][ei:15][fl:B]
;W[bh];B[ci];W[fg];B[fl]
C[Black 33-43:  Having played 33, Black can handle the fight up
to 43.  The game was by no means over after 43, but Black's advantage
was clear.  
];W[bi];B[bj];W[hi];B[ii];W[hk]
;B[hh];W[hl];B[dm];W[gm];B[em]
C[Black 33-43:  Having played 33, Black can handle the fight up
to 43.  The game was by no means over after 43, but Black's advantage
was clear.  
];W[ki];B[ik];W[il];B[fm];W[hm]
;B[ij];W[jl];B[jj];W[kj];B[gc];W[ec];B[ic]
(;W[kk]
C[White 56 is more or less the losing move.  Both of these programs
explicitly recognise ladders, and neither would cut at 56, but
Richard's program does not make the one extra step needed to
avoid protecting against it.  

];B[kg];W[ke];B[je];W[jf];B[kf];W[if];B[le];W[ld]
C[White 64 is an example of a blunder several of the programs made
trying to make good shape from dead stones.  The shape of 58,
60 and 64 is good, but white is not 'strong enough' to use it
properly.  This is one of the trickier problems with using simple
minded definitions of good shape.  
]LB[ke:58][jf:60]

;B[kd];W[lc];B[lb];W[me];B[mb];W[ie];B[lf]
C[Black 71 is a wasted move, but many of the programs would have
wasted two moves by capturing 64 and 66 completely.  
]LB[ld:64][lc:66]
;W[bg];B[jg];W[ee]
;B[gg];W[ff];B[gf];W[aj];B[id];W[he];B[hd];W[ge];B[ig];W[ak]
;B[bl];W[al];B[fb]
C[Black 87 has been the biggest point for some time - if white
had taken this point instead of 86 he might still have had a
chance.  From here until 105, black's yose is almost perfect.

];W[bm];B[eb];W[dc];B[db];W[cb];B[lh];W[li]
;B[ca];W[ba];B[da];W[bb];B[mi];W[mj];B[mh];W[fc];B[ji];W[fd]
;B[kh];W[gb];B[hb];W[fa];B[ga];W[mk];B[cm];W[am];B[gd];W[mf]
;B[bk];W[ai];B[hg];W[be];B[hf];W[fe];B[ea];W[cf];B[mc];W[df]
;B[md];W[bc];B[mg];W[ll];B[tt]
C[Pass 
];W[jb];B[jc];W[ib];B[kb];W[ka]
;B[ia];W[la];B[ma];W[km];B[ja];W[af]
C[Black wins by 14 points.  

Note that the tournament was played on the basis of Chinese counting,
so that the many extra stones White played inside his own territory
at the end cost no points, and the stones Black played to capture
White's dead stones were necessary according to the rules.  
])
(;W[kf]
C[Variation by sgb. Not in BGJ.  
];B[kk]
C[Black would not cut at 2 because the ladder does not work.  
];W[lk];B[kl];W[km];B[ll];W[ml];B[lm];W[mm]))
