[gnugo-devel] tuning patch

[Paul Pogonyshev]

this patch revises a pattern and adds two more. no regression changes.
it only fixes some mistakes made by gnugo in a game against itself,
version 3.2. the .sgf record follows after the patch. the mistakes
are on the moves 89, 91 and 205. of course, there were more serious
mistakes in the game, but i chose those which were easily fixable with
patterns.

pattern EE7 used to produce wrong moves quite often. i've seen at
least two more in my own games against gnu go. i've also seen "zero
point gote" move at least one more time (in a game 3.3.17 vs 3.2).

i'm somewhat afraid to mark the move in AS7 as an antisuji. instead i
added a large negative shape value (-10). however, M19 in the appended
game is still valued 1.28 points. probably the best solution would be
to revise antisuji moves as non-antisuji if they also have some vital
move reason (e.g. OWL_ATTACK). the same may also hold for large negative
shape values.

Paul


Index: attack.db
===================================================================
RCS file: /cvsroot/gnugo/gnugo/patterns/attack.db,v
retrieving revision 1.10
diff -u -p -r1.10 attack.db
--- attack.db   3 Feb 2003 13:12:50 -0000       1.10
+++ attack.db   12 Apr 2003 23:12:40 -0000
@@ -193,4 +193,20 @@ X*
 :8,A
 
 
+Pattern Attack19
+# pp New pattern (3.3.18)
+
+*.O        May be better to capture indirectly
+O.X
+..O
+
+:8,A
+
+*.O
+O.A
+..O
+
+; lib(A) == 1
+
+
 # END OF FILE
Index: endgame.db
===================================================================
RCS file: /cvsroot/gnugo/gnugo/patterns/endgame.db,v
retrieving revision 1.47
diff -u -p -r1.47 endgame.db
--- endgame.db  24 Mar 2003 11:46:19 -0000      1.47
+++ endgame.db  12 Apr 2003 23:12:42 -0000
@@ -236,14 +236,17 @@ Pattern EE6
 Pattern EE7
 # tm New Pattern (3.1.19)
 #   s classification, in case of ko (see trevorc:180)
+# pp Revised (3.3.18) the pattern to match on edge only.
 
 ?.X?
 O.*.
+----
 
 :8,sOXe,terri(0.75)
 
 ?.X?
 O.*a
+----
 
 ;proper_eye(a) && safe_omove(*)
 
Index: patterns2.db
===================================================================
RCS file: /cvsroot/gnugo/gnugo/patterns/patterns2.db,v
retrieving revision 1.56
diff -u -p -r1.56 patterns2.db
--- patterns2.db        17 Mar 2003 21:57:27 -0000      1.56
+++ patterns2.db        12 Apr 2003 23:12:45 -0000
@@ -1287,6 +1287,28 @@ Pattern AS6
 >replace(a,*);
 
 
+Pattern AS7
+# pp New pattern (3.3.18)
+
+?XX?       don't play stupid zero point gote
+o*.o
+----
+
+# It is shape-penaltized since it can probably be a semeai attack/defense
+# in exceptionally rare cases. But actually it is really an antisuji.
+
+:8,X,shape(-10)
+
+aXXc
+b*ed
+----
+
+; o_alive_somewhere(a,b) && o_alive_somewhere(c,d)
+; && (oplay_attack(*,e,*) || (o_somewhere(c) ? oplay_attack(*,e,c)
+;                                           : oplay_attack(*,e,d)))
+
+
+
 ###########################
 #
 # Shape moves. 



and the game:

(;GM[1]FF[3]
RU[Japanese]SZ[19]HA[2]KM[0.5]
PW[White]
PB[Black]
GN[White (W) vs. Black (B)]
DT[2003-03-31]
SY[Cgoban 1.9.14]TM[-]AB[pd][dp]
RE[W+67.5]
;W[dc];B[pp];W[nc];B[de];W[ee];B[ef];W[ed];B[dg];W[nq];B[lq];W[no];
B[pn];W[nm];B[iq];W[pl];B[lc];W[qc];B[qd];W[pc];B[od];W[nb];B[me];
W[cn];B[ph];W[ic];B[cl];W[cq];B[dq];W[cp];B[do];W[cr];B[dn];W[bn];
B[el];W[ce];B[cf];W[be];B[ke];W[nk];B[dr];W[kn];B[io];W[pr];B[qp];
W[rq];B[ql];W[qk];B[qm];W[rk];B[rp];W[im];B[rl];W[qq];B[pk];W[pj];
B[rn];W[ah];B[ni];W[li];B[mj];W[hn];B[lj];W[ki];B[fo];W[kl];B[mh];
W[gd];B[gl];W[kj];B[lh];W[ds];B[es];W[cs];B[fr];W[ri];B[rg];W[hk];
B[rc];W[rb];B[jg];W[rd];B[re];W[sc];B[sq];W[sr];B[sp];W[mr];B[lr];
W[ok];B[ei];W[ne];B[nd];W[kb];B[lb];W[ka];B[kc];W[jc];B[jd];W[gi];
B[fi];W[bi];B[lk];W[ii];B[rr];W[rh];B[qr];W[pq];B[ss];W[qg];B[rf];
W[pg];B[og];W[qh];B[gh];W[gj];B[ih];W[ll];B[oc];W[ob];B[oh];W[qf];
B[qe];W[mi];B[nj];W[bk];B[bl];W[qs];B[pf];W[he];B[fj];W[kh];B[kg];
W[hl];B[ff];W[gm];B[gk];W[go];B[fm];W[gp];B[hp];W[hi];B[hh];W[gq];
B[gr];W[ck];B[dk];W[op];B[co];W[bo];B[oo];W[on];B[ak];W[aj];B[al];
W[po];B[qo];W[cj];B[pm];W[om];B[dj];W[ci];B[bf];W[af];B[dd];W[cd];
B[df];W[ms];B[kk];W[jk];B[ji];W[jj];B[jh];W[hq];B[kp];W[hr];B[hs];
W[ir];B[jr];W[is];B[hf];W[ie];B[if];W[fe];B[id];W[hd];B[je];W[fq];
B[mb];W[fn];B[en];W[gn];B[gs];W[fp];B[sh];W[si];B[sk];W[sj];B[sl];
W[sg];B[dh];W[mk];B[eo];W[pi];B[gf];W[la];B[mc];W[eq];B[er];W[oo];
B[ma];W[jb];B[na];W[pb];B[oa];W[cm];B[pa];W[qa];B[dm];W[bg];B[oi];
W[ch];B[an];W[am];B[bm];W[ap];B[am];W[oj];B[of];W[sf];B[se];W[sh];
B[sd];W[rc];B[di];W[ao];B[dl];W[ar];B[ge];W[fc];B[cg];W[ep];B[sr];
W[ps];B[rs];W[tt];B[tt];
TW[aa][ba][ca][da][ea][fa][ga][ha][ia][ja][ra][sa][ab][bb][cb][db][eb][fb][gb][hb][ib][qb][sb][ac][bc][cc][ec][gc][hc][ad][bd][fd][ae][ag][bh][ai][qi][bj][hj][ij][qj][rj][ik][pk][il][jl][ml][nl][ol][hm][jm][km][lm][mm][in][jn][ln][mn][nn][ho][io][jo][ko][lo][mo][bp][hp][ip][jp][kp][lp][mp][np][aq][bq][iq][jq][kq][lq][mq][oq][br][jr][kr][lr][nr][or][as][bs][js][ks][ls][ns][os]
TB[kd][ld][md][le][ne][oe][pe][jf][kf][lf][mf][nf][eg][fg][gg][hg][ig][lg][mg][ng][eh][fh][nh][ej][ek][fk][fl][em][rm][sm][qn][sn][ro][so][fs]
C[The game is over.  Final score:
   White = 94 territory + 11 captures + 0.5 komi = 105.5
   Black = 35 territory + 3 captures = 38
White wins by 67.5.
]
)