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Subject: Re: Question for Prof. Hyatt

Author: Stuart Cracraft

Date: 22:04:26 02/24/06

Go up one level in this thread


[D]8/7p/5k2/5p2/p1p2P2/Pr1pPK2/1P1R3P/8 b - -

On February 22, 2006 at 15:38:43, Robert Hyatt wrote:
>
>
>It is less about depth and more about time.  It is getting this in 10 seconds
>using a single PIV 2.8 processor.  Part of the delay is caused by having to
>escape the white checks with the black king, part probably caused by forward
>pruning...

A monster bug in my pawn hash table implementation screwed me up royally
on this position. It's now solving. WAC #2 finally. This is with the
connected passed pawns term reward set to zero also.

position file? [wac.epd] wac.epd
# of test positions to test? 1
maxtime = 18000
Interrupt current ply and return move at timeout
Testsuite: Tests/wac.epd 1 positions
*** Problem   Solution(s): Rxb2 (bm)
-- ** -- ** -- ** -- **
** -- ** -- ** -- ** BP
-- ** -- ** -- BK -- **
** -- ** -- ** BP ** --
BP ** BP ** -- WP -- **
WP BR ** BP WP WK ** --
-- WP -- WR -- ** -- WP
** -- ** -- ** -- ** --
mv 1 stage 0, black to move, computer plays black
hash=359a65d864d93847
pawnhash=3e87fdd09deedce8
0 0 0 0 0 0
Alpha=2148 Beta=2949 Maxdepth=9999999 MaxTime=18000 xboard=0
Itr/Max Mv   Score   Time Nodes PV
 1/ 1> b3b2 2949  0.00        2 b3b2
 1/ 2  b3b2 6786  0.00       20 b3b2 d2b2
 2/ 3< b3b2 6385  0.00       42 b3b2 d2b2
 2/ 3  b3a3 2904  0.00      114 b3a3 b2a3
 3/ 4> b3a3 3304  0.00      139 b3a3 b2a3 c4c3
 3/ 5  b3b2 3304  0.00      215 b3b2
 4/ 5> b3b2 3704  0.00      284 b3b2 d2b2 c4c3
 4/ 9  c4c3 6658  0.04      777 c4c3 b2c3 b3c3
 5/ 9> c4c3 7058  0.04      967 c4c3 b2c3 b3c3 d2d3 c3d3 h2h4
 5/11  b3a3 7059  0.04     1336 b3a3 d2d3 c4d3 h2h4 a3a2
 6/11< b3a3 6658  0.06     2397 b3a3 d2d3 c4d3 h2h4 a3a2
 6/11  b3b2 6658  0.06     3189 b3b2 d2d3 c4d3 h2h4
 7/12> b3b2 7058  0.07     3669 b3b2 d2d3 c4d3 h2h4 f6e6
 7/17  b3b2 11035  0.11     9527 b3b2 d2d3 c4d3 e3e4 f5e4 f3e4 d3d2 e4f3 d2d1Q
f3g3
 8/17> b3b2 11435  0.14    13101 b3b2 d2d3 c4d3 e3e4 f5e4 f3e4 b2h2 e4f3 mtmt
 8/17  b3b2 11435  0.17    18160 b3b2 d2d3 c4d3 e3e4 b2h2 e4e5 f6e6 mtmt
 9/22> b3b2 11835  0.25    28837 b3b2 d2d3 c4d3 e3e4 b2h2 e4e5 f6e6 f3e3 d3d2
e3d4
 9/22  b3b2 11835  0.41    49090 b3b2 d2d3 c4d3 e3e4 f5e4 f3e3 b2e2 e3d4 e2h2
d4c4 f6f5
10/28  b3b2 11435  0.80   101551 b3b2 d2b2 c4c3 b2b5 h7h6 b5f5 f6f5 e3e4 f5e6
f4f5 e6e5 f3e3 d3d2
11/31  b3b2 11035  2.70   338466 b3b2 d2b2 c4c3 b2b5 d3d2 b5f5 f6f5 e3e4 f5f6
e4e5 f6e6 f3e4 c3c2 h2h4 e6d7 e5e6 d7e6
12/31< b3b2 10634  5.13   645304 b3b2 d2b2 c4c3 b2b5 d3d2 b5f5 f6f5 e3e4 f5f6
e4e5 f6f5
12/31  b3b2 10634  6.08   765294 b3b2 d2b2 c4c3 b2b8 d3d2 h2h4
13/37< b3b2 10233 53.21  6289004 b3b2 d2b2 c4c3 b2e2 d3d2 e2d2 c3d2 f3e2 h7h6
e2d2 f6e6 e3e4
13/37  b3b2 10232 59.07  7046041 b3b2 d2b2 c4c3 b2b6 f6f7 b6d6 d3d2 d6d2
14/40  b3b2 9833 97.81 11813884 b3b2 d2b2 c4c3 b2b6 f6g7 e3e4 f5e4 f3e3 h7h6
mtmt
15/43>Tb3b2  10233 180.00 20487181 b3b2 d2b2 c4c3 b2b6 f6g7 b6b7 g7g6 e3e4 d3d2
f3e2 h7h5 h2h4
nps=113815 h/p=8.00%/99.00% q=71.0% bc=63% br=2.87% mp=1690304512<>1087014880
pawnx=185779 recapx=23092 qcheckx=0 checkx=1384077 qfutilx=844878
onereplyx=61341 mthrx=0 futilx=0 bmx=171519
b3b2 d2b2 c4c3 b2b6 f6g7 b6b7 g7g6 e3e4 d3d2 f3e2 h7h5 h2h4
+ 15.00/43.00 100% 1/1 bf=2.87 h/p=8.00%/99.00% 180.01 20487180
20487180/180/113814 185779/23092/0/1384077/844878/61341/
pawnx/recapx/mthrx/checkx/qfutilx/onereplyx/futilx/bmx
--------------------------------
Missed:
maxtime = 18000
.

Stuart







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