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Subject: Fine 70 hashing litmus test (was Re: Rehashing)

Author: Stuart Cracraft

Date: 10:01:15 01/23/98

Go up one level in this thread


On January 23, 1998 at 03:04:43, Bruce Moreland wrote:

My litmus test for hashing has always been that if Fine 70 gets Kb1 in a
second or so, you're probably OK, but if you stall out at around ply 18,
 you have something horrible going wrong.  Fine 70:

8/k/3p/p2P1p/P2P1P/16/K w - - 0 1

The key is Kb1 and you should see a score jump of around a pawn at some
point, and if you get a PV you should eventually see a "Kxf5" in it
somewhere.

Okay, here is my output. Kb1 is found in a second. No stall at ply 18.
Kxf5 appears at ply 19 and persists for a few plys but is not around at
the higher plys (28, 29...)

How's it look to you?

K2 1/18/98 0.20
Type ? for help.
Transposition table:  Entries=100K Size=6400K
Pawn transposition table:  Entries=31K Size=3000K
? ? ? ? 30 seconds per problem.
fine70
Kb1

white
. . . . . . . .
k . . . . . . .
. . . p . . . .
p . . P . p . .
P . . P . P . .
. . . . . . . .
. . . . . . . .
K . . . . . . .

Phase = Endgame, Target search time = 30 sec, Root score = 146
 1&    0.0    152         1      Kb1
 1.    0.0    152         3      Kb1
 2-    0.0     54        19      Kb1
 2.    0.0    146        25      Kb1 Ka6
 3&    0.0    152        49      Kb1 Kb6 Kc2
 3&    0.0    156       104      Kb2 Kb6 Kc3
 3.    0.0    156       104      Kb2 Kb6 Kc3
 4-    0.0     54       196      Kb2
 4.    0.0    146       229      Kb2 Kb6 Kc3 Ka6
 5&    0.1    172       345      Kb2 Kb6 Kc3 Kc7 Kd3
 5.    0.1    172       368      Kb2 Kb6 Kc3 Kc7 Kd3
 6-    0.1     54       737      Kb2
 6.    0.1    146       806      Kb2 Kb6 Kc3 Kc7 Kd3 Kb6
 7&    0.1    165      1066      Kb2 Kb6 Kc3 Kc7 Kd3 Kd7 Ke3
 7.    0.1    165      1096      Kb2 Kb6 Kc3 Kc7 Kd3 Kd7 Ke3
 8-    0.1     54      1672      Kb2
 8.    0.1    146      1809      Kb2 Kb6 Kc3 Kc7 Kd3 Kd7 Ke3 Kc7
 9&    0.1    173      2386      Kb2 Kb6 Kc3 Kc7 Kc4 Kb6 Kd3 Kc7 Ke3
 9.    0.1    173      2409      Kb2 Kb6 Kc3 Kc7 Kc4 Kb6 Kd3 Kc7 Ke3
10-    0.1     54      3519      Kb2
10.    0.1    146      3747      Kb2 Kb6 Kc3 Kc7 Kc4 Kb6 Kd3 Kc7 Ke3 Kd7
11&    0.2    165      4633      Kb2 Kb6 Kc3 Kc7 Kc4 Kb6 Kd3 Kc7 Ke2 Kd7
Ke3
                                 Kc7 Ke2
11.    0.2    165      4656      Kb2 Kb6 Kc3 Kc7 Kc4 Kb6 Kd3 Kc7 Ke2 Kd7
Ke3
                                 Kc7 Ke2
12-    0.2     54      6781      Kb2
12.    0.2    146      7147      Kb2 Kb6 Kc3 Kc7 Kc4 Kb6 Kd3 Kc7 Ke2 Kd7
Ke3
                                 Kc7 Ke2
13&    0.2    163      8489      Kb2 Kb6 Kc3 Kc7 Kc4 Kb6 Kd3 Kc7 Ke2 Kd7
Kf2
                                 Ke7 Ke3 Kf6 Kd3 Ke7 Kc4 Kf6
13.    0.2    163      8512      Kb2 Kb6 Kc3 Kc7 Kc4 Kb6 Kd3 Kc7 Ke2 Kd7
Kf2
                                 Ke7 Ke3 Kf6 Kd3 Ke7 Kc4 Kf6
14-    0.3     54     13871      Kb2
14.    0.4    146     14520      Kb2 Kb6 Kc3 Ka6 Kd3 Kb6 Kc4 Ka6 Kb3 Kb6
Kc2
                                 Kc7 Kc1 Kd7 Kd1 Ke7 Kc1 Kf6 Kc2 Ke7 Kd3
Kf7
                                 Kc4 Kf6 Kb5 Ke7 Kxa5 Kf6 Kb4 Ke7
15&    0.4    152     17854      Kb2 Kb6 Kc3 Ka6 Kd3 Kb6 Kd2 Kb7 Ke2 Kc8
Kf2
                                 Kd7 Kg3 Ke7 Kh4
15.    0.4    152     17877      Kb2 Kb6 Kc3 Ka6 Kd3 Kb6 Kd2 Kb7 Ke2 Kc8
Kf2
                                 Kd7 Kg3 Ke7 Kh4
16-    0.6     54     27966      Kb2
16.    0.6    146     28541      Kb2 Kb6 Kc3 Ka6 Kd3 Kb6 Kd2 Kb7 Ke2 Kc8
Kf2
                                 Kd7 Kg3 Ke7 Kh4 Kd7
17&    0.8    153     34529      Kb2 Kb6 Kc3 Ka6 Kd3 Kb6 Ke2 Kc7 Kf2 Kd7
Kg3
                                 Ke7 Kh4 Kf6 Kh5 Ke7 Kg5
17.    0.8    153     34552      Kb2 Kb6 Kc3 Ka6 Kd3 Kb6 Ke2 Kc7 Kf2 Kd7
Kg3
                                 Ke7 Kh4 Kf6 Kh5 Ke7 Kg5
18&    1.1    153     51687      Kb2 Kb6 Kc3 Kb7 Kd3 Kc7 Kc4 Kb6 Kd3 Kc7
18.    1.1    153     51710      Kb2 Kb6 Kc3 Kb7 Kd3 Kc7 Kc4 Kb6 Kd3 Kc7
19&    1.6    153     71780      Kb2 Kb6 Kc3 Kb7 Kd3 Kc7 Ke2 Kd7 Ke3 Kc7
Kf2
                                 Kd7 Kg3 Ke7 Kh4 Kf6 Kh5 Ke7 Kg5 Kd7
Kxf5 Kc7
                                 Ke4
19.    1.6    153     71803      Kb2 Kb6 Kc3 Kb7 Kd3 Kc7 Ke2 Kd7 Ke3 Kc7
Kf2
                                 Kd7 Kg3 Ke7 Kh4 Kf6 Kh5 Ke7 Kg5 Kd7
Kxf5 Kc7
                                 Ke4
20&    2.9    153    136635      Kb2 Ka8 Kc3 Kb7 Kc2 Kb8 Kc3 Ka7 Kd3 Kb6
Ke2
                                 Kc7 Kf2 Kd7 Kg3 Ke7 Kh4 Kf6 Kh5 Ke7 Kg5
Kd7
                                 Kxf5 Kc7
20.    2.9    153    138224      Kb2 Ka8 Kc3 Kb7 Kc2 Kb8 Kc3 Ka7 Kd3 Kb6
Ke2
                                 Kc7 Kf2 Kd7 Kg3 Ke7 Kh4 Kf6 Kh5 Ke7 Kg5
Kd7
                                 Kxf5 Kc7
21&    3.2    153    148051      Kb2 Ka8 Kc3 Kb7 Kc2 Kb8 Kd3 Kc7 Kc4 Kb6
Kb3
                                 Kc7 Ka3 Kd7 Ka2 Kc7 Kb3 Kb7 Kc3 Ka6 Kd3
Kb6
                                 Ke2 Kc7 Kf2 Kd7 Kg3 Ke7 Kh4 Kf6 Kh5 Ke7
Kg5
                                 Kd7 Kxf5 Kc7 Ke4
21+    3.2    246    149158      Kb1
21.    4.2    178    188213      Kb1 Kb7 Kc1 Kc7 Kd1 Kd7 Kc2 Kc8 Kd2 Kc7
Kd3
                                 Kb7 Ke2 Kc8 Kf2 Kd7 Kg3 Ke7 Kh4 Kf6 Kh5
Ke7
                                 Kg5 Kd7 Kxf5 Kc7 Ke4 Kb7 Kd3
22&    4.7    153    214896      Kb1 Kb7 Kc1 Kc7 Kd2 Kc8 Ke2 Kd7 Kd3 Kc7
Kc4
                                 Kb6 Kc3 Kb7 Kc2 Kb8 Kd2 Kc8
22.    4.7    153    215184      Kb1 Kb7 Kc1 Kc7 Kd2 Kc8 Ke2 Kd7 Kd3 Kc7
Kc4
                                 Kb6 Kc3 Kb7 Kc2 Kb8 Kd2 Kc8
23+   14.6    244    681891      Kb1
23.   15.8    178    724316      Kb1 Kb7 Kc1 Kc7 Kd1 Kd7 Kc2 Kc8 Kd2 Kc7
Kd3
                                 Kb7 Ke2 Kc8 Kf2 Kd7 Kg3 Ke7 Kh4 Kf6 Kh5
Ke7
                                 Kg5 Kd7 Kxf5 Kc7 Ke4 Kb7 Kd3 Kb6 Ke2
24&   17.7    246    818110      Kb1 Kb7 Kc1 Kc7 Kd1 Kb7 Ke2 Kb6 Kf2 Kc7
Kg3
                                 Kd7 Kh4 Ke7 Kg5 Kf7 Kxf5 Ke7 Ke4 Kd7
Kd3 Kc7
                                 Ke2 Kb7
24.   17.7    246    818233      Kb1 Kb7 Kc1 Kc7 Kd1 Kb7 Ke2 Kb6 Kf2 Kc7
Kg3
                                 Kd7 Kh4 Ke7 Kg5 Kf7 Kxf5 Ke7 Ke4 Kd7
Kd3 Kc7
                                 Ke2 Kb7
25&   21.6    237    948226      Kb1 Kb7 Kc1 Kc7 Kd1 Kc8 Kd2 Kd7 Kc3 Kc7
Kd3
                                 Kb7 Kc3 Kc7
25.   21.6    237    948344      Kb1 Kb7 Kc1 Kc7 Kd1 Kc8 Kd2 Kd7 Kc3 Kc7
Kd3
                                 Kb7 Kc3 Kc7
26&   22.9    237   1010685      Kb1 Kb7 Kc1 Kc7 Kd1 Kc8 Kd2 Kd7 Kc3 Kc7
Kd3
                                 Kb7 Kc3 Kc7
26.   22.9    237   1010803      Kb1 Kb7 Kc1 Kc7 Kd1 Kc8 Kd2 Kd7 Kc3 Kc7
Kd3
                                 Kb7 Kc3 Kc7
27&   23.4    237   1033465      Kb1 Kb7 Kc1 Kc7 Kd1 Kc8 Kd2 Kd7 Kc3 Kc7
Kd3
                                 Kb7 Kc3 Kc7
27.   23.4    237   1033583      Kb1 Kb7 Kc1 Kc7 Kd1 Kc8 Kd2 Kd7 Kc3 Kc7
Kd3
                                 Kb7 Kc3 Kc7
28&   24.1    237   1062168      Kb1 Kb7 Kc1 Kc7 Kd1 Kc8 Kd2 Kd7 Kc3 Kc7
Kd3
                                 Kb7 Kc3 Kc7
28.   24.1    237   1062286      Kb1 Kb7 Kc1 Kc7 Kd1 Kc8 Kd2 Kd7 Kc3 Kc7
Kd3
                                 Kb7 Kc3 Kc7
29.   30.0    237   1211110      Kb1 Kb7 Kc1 Kc7 Kd1 Kc8 Kd2 Kd7 Kc3 Kc7
Kd3
                                 Kb7 Kc3 Kc7

My move is : Kb1
Time = 30.0 Rate=40322 Nodes=[1196402/14708/1211110]
Eval=177292 RptCnt=19091 NullCut=1704
Extensions: Check=4512 Recapture=139 Pawn=0 PassedPawn=0
            OneMove=0 Threat=0 DeepSearch=0 Mate=0
Material=[400/300] Worst=[46/-668]
Hash: Success=98% Collision=95%
Hash Counts: ReadHits=916615, ReadProbes=934112, WriteColl=485994,
WriteTries=50
6524
Pawn Hash: Success=99% Collision=0%
Pawn Counts: ReadHits=354171, ReadProbes=354517, WriteColl=0,
WriteTries=346

black
. . . . . . . .
k . . . . . . .
. . . p . . . .
p . . P . p . .
P . . P . P . .
. . . . . . . .
. . . . . . . .
. K . . . . . .

+++  Kb1 Kb1

Correct so far: 1 Total problems: 1 Percent: 100%

********* Grand totals **********
Time = 30.0 Rate=40323 Nodes=[1196402/14708/1211110]
EvalCnt=177292 RptCnt=19091 NullCut=1704
Extensions: Check=4512 Recapture=139 Pawn=0 PassedPawn=0
            OneMove=0 Threat=0 DeepSearch=0 Mate=0
Hash: Success=98% Collision=95%
Pawn Hash: Success=99% Collision=0%
?



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