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Subject: Re: Chess program improvement project (copy at Winboard::Programming)

Author: Dann Corbit

Date: 00:47:06 03/07/06

Go up one level in this thread


On March 07, 2006 at 03:02:17, Uri Blass wrote:

>On March 07, 2006 at 00:46:27, Dann Corbit wrote:
>
>>On March 07, 2006 at 00:41:55, Dann Corbit wrote:
>>
>>>On March 07, 2006 at 00:34:48, Stuart Cracraft wrote:
>>>
>>>>On March 07, 2006 at 00:31:45, Dann Corbit wrote:
>>>>
>>>>>On March 07, 2006 at 00:27:43, Stuart Cracraft wrote:
>>>>>[snip]
>>>>>>Very interesting indeed. A clever test.
>>>>>>
>>>>>>If one's results do not rotate approximately as described
>>>>>>for the four positions and you say the evaluation is an
>>>>>>issue, what kinds of evaluation issues have you seen that
>>>>>>could explain it?!?
>>>>>
>>>>>The most common thing that I see is something that is good for white being
>>>>>counted as positive for black also on the evaluation.  Often, when we are
>>>>>writing the eval, we are thinking from the perspective of white. And so if we
>>>>>are not very careful, we may invert the sign of some evaluation component and
>>>>>count something that is good for white as something that is good for black (or
>>>>>vice versa, though the reverse is seen less often for some reason).
>>>>>
>>>>>There are, of course, many other possible causes besides that.
>>>>
>>>>A good point. I try to avoid that by always doing things from the
>>>>side on move, almost always. There are a few in there however with
>>>>respect to white and black specifically, but they are then folded
>>>>together with the stm variable and stm^1 which translate to white/black
>>>>or black/white depending on who's on move. I could try this: rerun
>>>>your rotation test with successively less in the evaluation table
>>>>until nothing but material and see what happens.
>>>
>>>Right.  If you have divided off the eval components, you could binary search
>>>until you find the problem component.
>>>
>>>Now, we do not know for sure that it is an eval sign problem.  However, the fact
>>>that the records are similar in pairs makes it very suspicious.
>>
>>I guess that when you have gotten your eval symmetrical, you will miss less than
>>ten problems on WAC.
>
>I think that you are wrong here.
>Stuart may have evaluation bugs but his main problem is the search.

I think it likely that it is both.

Given:
5rk1/2p4p/2p4r/3P4/4p1b1/1Q2NqPp/PP3P1K/R4R2 b - - bm Qg2+; id "-rotXTDa.1";
1kr5/p4p2/r4p2/4P3/1b1p4/pPqN2Q1/K1P3PP/2R4R b - - bm Qb2+; id "-rotXTDg.1";
r4r2/pp3p1k/1q2nQpP/4P1B1/3p4/2P4R/2P4P/5RK1 w - - bm Qg7+; id "-rotXTDc.8";
2r4r/k1p3pp/PpQn2q1/1B1P4/4p3/R4P2/P4P2/1KR5 w - - bm Qb7+; id "-rotXTDe.8";

When I changed to material only eval, here is the result:

st 5
ts
position file? [wac.epd] rot.epd
# of test positions to test? 4
maxtime = 500
Interrupt current ply and return move at timeout
Testsuite: rot.epd 4 positions
*** Problem   Solution(s): Qg2+ (bm)
[D] 5rk1/2p4p/2p4r/3P4/4p1b1/1Q2NqPp/PP3P1K/R4R2 b - - bm Qg2+
*** Problem   Solution(s): Qg2+ (bm)
-- ** -- ** -- BR BK **
** -- BP -- ** -- ** BP
-- ** BP ** -- ** -- BR
** -- ** WP ** -- ** --
-- ** -- ** BP ** BB **
** WQ ** -- WN BQ WP BP
WP WP -- ** -- WP -- WK
WR -- ** -- ** WR ** --
mv 1 stage 0, black to move, computer plays black
hash=62305c813f5fad4
pawnhash=3da7edf6c1ba87ea
0 0 0 0 0 0
Alpha=-400 Beta=400 Maxdepth=9999999 MaxTime=500 xboard=1
Ply Score Time  Nodes PV
1.  40     3 12 c6d5 e3d5
1.  900     5 74 f3g2 e3g2
2.  860     6 343 f3g2 e3g2 h3g2 h2g1 g2f1R a1f1
2.  800     8 717 f3g3 h2g3 f8f3 g3h2
3.  900    11 1410 f3g2 e3g2 h6e6 g2f4
3.  900    13 1632 f3g2 e3g2 h6e6 g2f4
4.  940    14 2675 f3g2 e3g2 h6e6 g2f4 g4f3 h2g1
4.  1075    17 4846 f3g2 e3g2 h3g2 h2g2 f8f2 f1f2 g4f3 g2g1
5.  1035    22 9203 f3g2 e3g2 h3g2 h2g2 f8f2 f1f2 g4f3 g2g1 h6h1
5.  1000    25 10969 f3g2 e3g2 h3g2 h2g2 f8f2 f1f2 g4f3 g2g1 h6h1
6.  960    33 28940 f3g2 e3g2 h3g2 h2g2 g4f3 b3f3 e4f3 g2g1 c6d5 mtmt
6.  975    36 28969 f3g2 e3g2 h3g2 h2g2 g4f3 b3f3 e4f3 g2g1 c6d5 mtmt
7.  935    52 82634 f3g2 e3g2 h3g2 h2g2 g4f3 b3f3 e4f3 g2g1 c6d5 a1d1 h6f6 d1d5
7.  675   144 440273 f3g2 e3g2 h3g2 h2g2 h6e6 b3f3 g4h3
8.  635   486 1803798 f3g2 e3g2 h3g2 h2g2 h6e6 b3f3 g4h3 g2g1 c6d5
8.  635   513 1887770 f3g2 e3g2 h3g2 h2g2 h6e6 b3f3 g4h3 g2g1 c6d5
9.  595 516 1889280 f3g2 e3g2 h3g2 h2g2 h6e6 b3f3 g4h3 g2g1 c6d5 a1d1 e4f3 d1d5
h3f1
nps=366140 h/p/q=9.00%/0.00%/0.00% q=77.0% bc=22% br=2.07mp=0/0/0/0
pawnx=45057 recapx=6831 qcheckx=0 checkx=107736 qfutilx=104157 onereplyx=13658
mthrx=34 futilx=0 bmx=23858
f3g2 e3g2 h3g2 h2g2 h6e6 b3f3 g4h3 g2g1 c6d5 a1d1 e4f3 d1d5 h3f1 + 9.00/23.00
100% 1/1 bf=2.07 h/p/q=9.00%/0.00%/0.00% 5.16 1889280 1889280/5/366140 45057/
6831/34/107736/104157/13658/0/23858
*** Problem   Solution(s): Qb2+ (bm)
[D] 1kr5/p4p2/r4p2/4P3/1b1p4/pPqN2Q1/K1P3PP/2R4R b - - bm Qb2+
*** Problem   Solution(s): Qb2+ (bm)
-- BK BR ** -- ** -- **
BP -- ** -- ** BP ** --
BR ** -- ** -- BP -- **
** -- ** -- WP -- ** --
-- BB -- BP -- ** -- **
BP WP BQ WN ** -- WQ --
WK ** WP ** -- ** WP WP
** -- WR -- ** -- ** WR
mv 1 stage 0, black to move, computer plays black
hash=51088962b6bb2764
pawnhash=804f834da0b35d60
0 0 0 0 0 0
Alpha=-400 Beta=400 Maxdepth=9999999 MaxTime=500 xboard=1
Ply Score Time  Nodes PV
1.  40     5 12 f6e5 d3e5
1.  900     6 103 c3a1 c1a1
2.  860     6 369 c3a1 c1a1 c8c2 a2b1
2.  900    10 373 c3a1 c1a1 c8c2 a2b1
3.  900    11 1591 c3b2 d3b2 a6d6 a2b1
4.  940    14 2836 c3b2 d3b2 a6d6 a2b1 a3b2 e5d6
4.  1075    16 3970 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 c8c2 b2a1
5.  1035    24 13845 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 b4a3 b2a1 a3b2 a1b1 c8e8 h1e1
5.  1075    28 13872 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 b4a3 b2a1 a3b2 a1b1 c8e8 h1e1
6.  1075    39 48637 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 c8c2 b2a1 b4c3 a1b1 c2b2 b1a1
b2d2 a1b1 c3b2 h1e1
7.  1035    71 170421 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 c8c2 b2a1 b4c3 a1b1 c2b2
b1a1 b2d2 a1b1 a7a6
7.  1075    75 170473 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 c8c2 b2a1 b4c3 a1b1 c2b2
b1a1 b2d2 a1b1 a7a6
8.  1035   158 525876 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 c8c2 b2a1 b4c3 a1b1 c2b2
b1a1 b2d2 a1b1 d2b2 b1a1 b2d2 a1b1 d2b2 b1a1 b2d2 a1b1 d2b2
8.  1075   164 525891 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 c8c2 b2a1 b4c3 a1b1 c2b2
b1a1 b2d2 a1b1 d2b2 b1a1 b2d2 a1b1 d2b2 b1a1 b2d2 a1b1 d2b2
9.  1035   358 1369801 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 c8c2 b2a1 b4c3 a1b1 c2b2
b1a1 b2d2 c1c3 a7a5
9.  975   691 2745589 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 c8c2 b2a1 b4c3 a1b1 c2b2
b1a1 b2d2 c1c3 a7a5
10.  1075 697 2747407 c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 b4d6 c2c3 mtmt
nps=394176 h/p/q=19.00%/0.00%/0.00% q=75.0% bc=25% br=1.71mp=0/0/0/0
pawnx=60532 recapx=8959 qcheckx=0 checkx=151015 qfutilx=208866 onereplyx=17819
mthrx=83 futilx=0 bmx=35859
c3b2 d3b2 a3b2 a2b1 a6a1 b1b2 b4d6 c2c3 + 9.50/24.00 100% 2/2 bf=1.89
h/p/q=14.00%/0.00%/0.00% 12.13 4636687 2318344/6/382250
105589/15790/117/258751/31302
3/31477/0/59717
*** Problem   Solution(s): Qg7+ (bm)
[D] r4r2/pp3p1k/1q2nQpP/4P1B1/3p4/2P4R/2P4P/5RK1 w - - bm Qg7+
*** Problem   Solution(s): Qg7+ (bm)
BR ** -- ** -- BR -- **
BP BP ** -- ** BP ** BK
-- BQ -- ** BN WQ BP WP
** -- ** -- WP -- WB --
-- ** -- BP -- ** -- **
** -- WP -- ** -- ** WR
-- ** WP ** -- ** -- WP
** -- ** -- ** WR WK --
mv 1 stage 0, white to move, computer plays white
hash=c68993bbe41347e7
pawnhash=9880b49e4419005b
0 0 0 0 0 0
Alpha=-400 Beta=400 Maxdepth=9999999 MaxTime=500 xboard=1
Ply Score Time  Nodes PV
1.  40     5 80 c3c4
1.  40     5 122 f6g7 e6g7 mtmt
2.  80     6 136 f6g7 e6g7 h6g7 h7g7 c3d4
2.  900     9 335 f6g7 e6g7 c3c4
3.  940    11 727 f6g7 e6g7 c3c4 g7f5 h3d3
3.  940    12 1148 f6g7 e6g7 c3c4 g7f5 h3d3
4.  980    16 1843 f6g7 e6g7 c3c4 g7f5 h3d3 f5h6
4.  1075    19 3922 f6g7 e6g7 h6g7 h7g7 f1f7 f8f7 c3c4
5.  1115    22 7756 f6g7 e6g7 h6g7 h7g7 f1f7 g7f7 e5e6 f7g8 e6e7 mtmt
5.  1115    27 12930 f6g7 e6g7 h6g7 h7g7 f1f7 g7f7 e5e6 f7g8 e6e7 mtmt
6.  1075    34 36178 f6g7 e6g7 h6g7 h7g7 f1f7 g7f7 e5e6 f7g8 e6e7 d4c3 g1h1
6.  1075    37 36217 f6g7 e6g7 h6g7 h7g7 f1f7 g7f7 e5e6 f7g8 e6e7 d4c3 g1h1
7.  1035    52 86116 f6g7 e6g7 h6g7 h7g7 f1f7 g7f7 e5e6 b6e6 h3h7 f7e8 h7e7 e8d8
e7d7 d8c8 d7d4
7.  1035    58 86243 f6g7 e6g7 h6g7 h7g7 f1f7 g7f7 e5e6 b6e6 h3h7 f7e8 h7e7 e8d8
e7d7 d8c8 d7d4
8.  995   289 1077323 f6g7 e6g7 h6g7 h7g8 h3h8 g8g7 h8h7 g7h7 c3c4 d4d3
8.  995   294 1078268 f6g7 e6g7 h6g7 h7g8 h3h8 g8g7 h8h7 g7h7 c3c4 d4d3 g5e3
b6e3
9.  955   870 3692420 f6g7 e6g7 h6g7 h7g8 h3h8 g8g7 h8h7 g7h7 c3c4 d4d3 g5e3
b6e3
9.  955   877 3693411 f6g7 e6g7 h6g7 h7g8 h3h8 g8g7 h8h7 g7h7 c3c4 d4d3 g5e3
b6e3
10.  915 883 3694592 f6g7 e6g7 h6g7 h7g8 h3h8 g8g7 h8h7 g7h7 c3c4 d4d3 g5e3 b6e3
nps=418414 h/p/q=10.00%/0.00%/0.00% q=65.0% bc=42% br=1.85mp=0/0/0/0
pawnx=73316 recapx=17014 qcheckx=0 checkx=189776 qfutilx=1233926 onereplyx=20220
mthrx=94 futilx=0 bmx=45724
f6g7 e6g7 h6g7 h7g8 h3h8 g8g7 h8h7 g7h7 c3c4 d4d3 g5e3 b6e3 + 9.67/24.33 100%
3/3 bf=1.88 h/p/q=12.67%/0.00%/0.00% 20.96 8331279 2777093/7/397485 178905/32
804/211/448527/1546949/51697/0/105441
*** Problem   Solution(s): Qb7+ (bm)
[D] 2r4r/k1p3pp/PpQn2q1/1B1P4/4p3/R4P2/P4P2/1KR5 w - - bm Qb7+
*** Problem   Solution(s): Qb7+ (bm)
-- ** BR ** -- ** -- BR
BK -- BP -- ** -- BP BP
WP BP WQ BN -- ** BQ **
** WB ** WP ** -- ** --
-- ** -- ** BP ** -- **
WR -- ** -- ** WP ** --
WP ** -- ** -- WP -- **
** WK WR -- ** -- ** --
mv 1 stage 0, white to move, computer plays white
hash=7e637ae2516b5379
pawnhash=fa47e106c8a09dce
0 0 0 0 0 0
Alpha=-400 Beta=400 Maxdepth=9999999 MaxTime=500 xboard=1
Ply Score Time  Nodes PV
1.  40     3 87 c1c2
1.  40     4 130 c6b7 d6b7 mtmt
2.  80     6 144 c6b7 d6b7 a6b7 a7b7 f3e4
2.  900     7 359 c6b7 d6b7 f3f4
3.  940     9 760 c6b7 d6b7 f3f4 b7c5 a3e3
3.  940    12 1181 c6b7 d6b7 f3f4 b7c5 a3e3
4.  980    15 1892 c6b7 d6b7 f3f4 b7c5 a3e3 c5a6
4.  1075    17 4042 c6b7 d6b7 a6b7 a7b7 c1c7 c8c7 f3f4
5.  1115    22 7863 c6b7 d6b7 a6b7 a7b7 c1c7 b7c7 d5d6 c7b8 d6d7 mtmt
5.  1115    25 12335 c6b7 d6b7 a6b7 a7b7 c1c7 b7c7 d5d6 c7b8 d6d7 mtmt
6.  1075    34 35510 c6b7 d6b7 a6b7 a7b7 c1c7 b7c7 d5d6 c7b8 d6d7 e4f3 b1a1
6.  1075    37 35547 c6b7 d6b7 a6b7 a7b7 c1c7 b7c7 d5d6 c7b8 d6d7 e4f3 b1a1
7.  1035    51 83840 c6b7 d6b7 a6b7 a7b7 c1c7 b7c7 d5d6 g6d6 a3a7 c7d8 a7d7 d8e8
d7e7 e8f8 e7e4
7.  1035    57 84002 c6b7 d6b7 a6b7 a7b7 c1c7 b7c7 d5d6 g6d6 a3a7 c7d8 a7d7 d8e8
d7e7 e8f8 e7e4
8.  995   261 936267 c6b7 d6b7 a6b7 a7b8 a3a8 b8b7 a8a7 b7a7 f3f4 e4e3
8.  995   265 937147 c6b7 d6b7 a6b7 a7b8 a3a8 b8b7 a8a7 b7a7 f3f4 e4e3
9.  955   917 3950220 c6b7 d6b7 a6b7 a7b8 a3a8 b8b7 a8a7 b7a7 f3f4 e4e3
9.  -1075 920 3950600 c6b7 d6b7 a6b7 a7b8 a3a8 b8b7 a8a7 b7a7 f3f4 e4e3
nps=429413 h/p/q=9.00%/0.00%/0.00% q=65.0% bc=42% br=2.11mp=0/0/0/0
pawnx=78599 recapx=17514 qcheckx=0 checkx=192899 qfutilx=1271535 onereplyx=20313
mthrx=142 futilx=0 bmx=46542
c6b7 d6b7 a6b7 a7b8 a3a8 b8b7 a8a7 b7a7 f3f4 e4e3 + 9.50/24.75 100% 4/4 bf=1.93
h/p/q=11.75%/0.00%/0.00% 30.16 12281879 3070470/8/407224 257504/50318/353/6
41426/2818484/72010/0/151983
pawnx/recapx/mthrx/checkx/qfutilx/onereplyx/futilx/bmx
--------------------------------
Missed:
maxtime = 500



And here is the result with full evaluation:

st 5
ts
position file? [wac.epd] rot.epd
# of test positions to test? 4
maxtime = 500
Interrupt current ply and return move at timeout
Testsuite: rot.epd 4 positions
*** Problem   Solution(s): Qg2+ (bm)
[D] 5rk1/2p4p/2p4r/3P4/4p1b1/1Q2NqPp/PP3P1K/R4R2 b - - bm Qg2+
*** Problem   Solution(s): Qg2+ (bm)
-- ** -- ** -- BR BK **
** -- BP -- ** -- ** BP
-- ** BP ** -- ** -- BR
** -- ** WP ** -- ** --
-- ** -- ** BP ** BB **
** WQ ** -- WN BQ WP BP
WP WP -- ** -- WP -- WK
WR -- ** -- ** WR ** --
mv 1 stage 0, black to move, computer plays black
hash=1c919179132b7b3
pawnhash=8a0a74bcb776acca
0 0 0 0 0 0
Alpha=-269 Beta=531 Maxdepth=9999999 MaxTime=500 xboard=1
Ply Score Time  Nodes PV
1.  53     3 32 c6d5 b3d5
1.  55     5 291 g8f7
2.  95     6 403 g8f7 e3g4
2.  96     8 752 g4c8
3.  135     9 2349 c6d5 b3d5 g4e6
4.  95    12 4412 c6d5 b3d5 g4e6 d5d2 h6h5
4.  -6    17 8704 c6d5 b3d5 g4e6 d5g5 h6g6 g5e7
5.  2    23 15857 c6d5 b3d5 g4e6 d5g5 h6g6 g5c5
6.  42    30 19626 c6d5 b3d5 g4e6 d5g5 h6g6 g5c5 e6a2 a1a2
6.  42    44 40280 c6d5 b3d5 g4e6 d5g5 h6g6 g5c5 e6a2 a1a2
7.  2    84 108817 c6d5 b3d5 g4e6 d5g5 h6g6 g5c5 e6a2 a1a2 f3g3 f2g3
7.  -13   161 232543 c6d5 b3d5 f8f7 d5d8 f7f8 d8d5 f8f7 d5d8 f7f8 d8g5 h6g6 g5e7
8.  -5   286 446952 c6d5 b3d5 f8f7 d5d8 g8g7 d8g5 h6g6 g5e5 g7g8 e5e8 f7f8 e8e7
g6g7 e7c5
9.  4   645 1065011 c6d5 b3d5 g4e6 d5g5 h6g6 g5b5 c7c6 b5b7 c6c5
10.  -36 651 1068048 c6d5 b3d5 g4e6 d5g5 h6g6 g5b5 c7c6 b5b7 c6c5 a2a4
nps=164063 h/p/q=28.00%/99.00%/0.00% q=75.0% bc=58%
br=1.69mp=738/1444/-1029/-288
pawnx=12373 recapx=3258 qcheckx=0 checkx=35375 qfutilx=196394 onereplyx=2987
mthrx=0 futilx=0 bmx=24
c6d5 b3d5 g4e6 d5g5 h6g6 g5b5 c7c6 b5b7 c6c5 a2a4 - 10.00/24.00 0% 0/1 bf=1.69
h/p/q=28.00%/99.00%/0.00% 6.51 1068048 1068048/7/164063 12373/3258/0/35375/1
96394/2987/0/24
*** Problem   Solution(s): Qb2+ (bm)
[D] 1kr5/p4p2/r4p2/4P3/1b1p4/pPqN2Q1/K1P3PP/2R4R b - - bm Qb2+
*** Problem   Solution(s): Qb2+ (bm)
-- BK BR ** -- ** -- **
BP -- ** -- ** BP ** --
BR ** -- ** -- BP -- **
** -- ** -- WP -- ** --
-- BB -- BP -- ** -- **
BP WP BQ WN ** -- WQ --
WK ** WP ** -- ** WP WP
** -- WR -- ** -- ** WR
mv 1 stage 0, black to move, computer plays black
hash=71801a12a5920a01
pawnhash=9e083cf738c2028
0 0 0 0 0 0
Alpha=-309 Beta=491 Maxdepth=9999999 MaxTime=500 xboard=1
Ply Score Time  Nodes PV
1.  6     5 228 f6e5 g3e5
2.  46     6 270 f6e5 g3e5 a6d6
2.  48     8 759 b8c7
3.  88     9 1291 b8c7 d3b4 c3b2
3.  139    12 2599 f6e5 g3e5 b4d6 e5e2
4.  99    16 5227 f6e5 g3e5 b8b7 e5e2
4.  -4    22 9691 f6e5 g3e5 b4d6 e5f5
5.  -10    31 23381 a6e6 e5f6 b4d6 g3f3
6.  30    47 42794 a6e6 e5f6 b4d6 g3g4 e6e8
6.  30    59 62346 f6e5 g3e5 b4d6 e5b5 a6b6 b5d7 c3d2 d7f7
7.  -7   125 169904 f6e5 g3e5 b8a8 e5b5 a6b6 b5f5
8.  -11   395 608302 c8c7 e5f6 a6f6 h1e1 b4d6 g3g5 d6h2
9.  29  1014 1647263 f6e5 g3e5 b4d6 e5e1 c3e1 d3e1 c8c7 mtmt
10.  -11 1019 1648640 f6e5 g3e5 b4d6 e5e1 c3e1 d3e1 c8c7 e1f3 d6f4 f3d4
nps=161790 h/p/q=23.00%/99.00%/0.00% q=76.0% bc=58%
br=1.72mp=168/1584/-1410/-1212
pawnx=16613 recapx=5128 qcheckx=0 checkx=53348 qfutilx=334620 onereplyx=4295
mthrx=0 futilx=0 bmx=54
f6e5 g3e5 b4d6 e5e1 c3e1 d3e1 c8c7 e1f3 d6f4 f3d4 - 10.00/24.00 0% 0/2 bf=1.70
h/p/q=25.50%/99.00%/0.00% 16.70 2716688 1358344/8/162676 28986/8386/0/88723/
531014/7282/0/78
*** Problem   Solution(s): Qg7+ (bm)
[D] r4r2/pp3p1k/1q2nQpP/4P1B1/3p4/2P4R/2P4P/5RK1 w - - bm Qg7+
*** Problem   Solution(s): Qg7+ (bm)
BR ** -- ** -- BR -- **
BP BP ** -- ** BP ** BK
-- BQ -- ** BN WQ BP WP
** -- ** -- WP -- WB --
-- ** -- BP -- ** -- **
** -- WP -- ** -- ** WR
-- ** WP ** -- ** -- WP
** -- ** -- ** WR WK --
mv 1 stage 0, white to move, computer plays white
hash=6fcb7ac9dc7a09ab
pawnhash=dd49209bafb21580
0 0 0 0 0 0
Alpha=-248 Beta=552 Maxdepth=9999999 MaxTime=500 xboard=1
Ply Score Time  Nodes PV
1.  55     3 32 c3d4 b6d4
1.  57     5 291 g1f2
2.  97     6 403 g1f2 e6g5
2.  98     8 752 g5c1
3.  137     9 2373 c3d4 b6d4 g5e3
4.  97    13 4583 c3d4 b6d4 g5e3 d4d5 h3h4
4.  -4    19 8881 c3d4 b6d4 g5e3 d4g4 h3g3 g4e2
5.  4    25 15937 c3d4 b6d4 g5e3 d4g4 h3g3 g4c4
6.  44    30 19599 c3d4 b6d4 g5e3 d4g4 h3g3 g4c4 e3a7 a8a7
6.  44    44 40461 c3d4 b6d4 g5e3 d4g4 h3g3 g4c4 e3a7 a8a7
7.  4    81 102052 c3d4 b6d4 g5e3 d4g4 h3g3 g4c4 e3a7 a8a7 f6g6 f7g6
7.  -9   150 211799 c3d4 b6d4 f1f2 d4d1 f2f1 d1d4 f1f2 d4d1 f2f1 d1g4 h3g3 g4e2
8.  31   250 379548 c3d4 b6d4 g5e3 d4b4 h3g3 mtmt
9.  70   492 790165 c3d4 b6d4 g5e3 d4g4 h3g3 g4b4 f1f2 b4b1 g1g2 a8c8 g3h3
10.  31   958 1625779 c3d4 b6d4 g5e3 d4b4 f6f2 a7a5 f2f7 f8f7 g1g2 a8c8
11.  -9 963 1626112 c3d4 b6d4 g5e3 d4b4 f6f2 a7a5 f2f7 f8f7 g1g2 a8c8
nps=168859 h/p/q=31.00%/99.00%/0.00% q=74.0% bc=54% br=1.65mp=144/537/-55/0
pawnx=19715 recapx=4461 qcheckx=0 checkx=51728 qfutilx=279238 onereplyx=4211
mthrx=51 futilx=0 bmx=68
c3d4 b6d4 g5e3 d4b4 f6f2 a7a5 f2f7 f8f7 g1g2 a8c8 - 10.33/24.67 0% 0/3 bf=1.69
h/p/q=27.33%/99.00%/0.00% 26.33 4342800 1447600/9/164937 48701/12847/51/1404
51/810252/11493/0/146
*** Problem   Solution(s): Qb7+ (bm)
[D] 2r4r/k1p3pp/PpQn2q1/1B1P4/4p3/R4P2/P4P2/1KR5 w - - bm Qb7+
*** Problem   Solution(s): Qb7+ (bm)
-- ** BR ** -- ** -- BR
BK -- BP -- ** -- BP BP
WP BP WQ BN -- ** BQ **
** WB ** WP ** -- ** --
-- ** -- ** BP ** -- **
WR -- ** -- ** WP ** --
WP ** -- ** -- WP -- **
** WK WR -- ** -- ** --
mv 1 stage 0, white to move, computer plays white
hash=31a4920ed5f5b3c8
pawnhash=eb744dc31142c6c
0 0 0 0 0 0
Alpha=-288 Beta=512 Maxdepth=9999999 MaxTime=500 xboard=1
Ply Score Time  Nodes PV
1.  8     4 227 f3e4 g6e4
2.  48     7 269 f3e4 g6e4 a3d3
2.  50     8 756 b1c2
3.  90    10 1274 b1c2 d6b5 c6b7
3.  142    11 2539 f3e4 g6e4 b5d3 e4e5
4.  102    15 5097 f3e4 g6e4 b1a1 e4e5
4.  -2    21 10207 f3e4 g6e4 b5d3 e4f4
5.  -8    30 23455 f3e4 g6e4 b5d3 e4b4 a3b3 b4d2
6.  33    35 28610 f3e4 g6e4 b5d3 e4b4 a3b3 b4d2 d3h7 h8h7
6.  33    50 50653 f3e4 g6e4 b5d3 e4b4 a3b3 b4d2 d3h7 h8h7
7.  -0   110 150701 f3e4 g6e4 c1c2 e4e1 c2c1 e1b4 a3b3 b4e4 b5d3 e4f4
8.  -4   244 382387 f3e4 g6e4 b5d3 e4b4 a3b3 b4d4 c6d7 a7b8
9.  36   629 1102675 f3e4 g6e4 b5d3 e4e8 c6c3 d6b5 d3b5 e8b5 c3b3
10.  76 635 1107968 f3e4 g6e4 b5d3 e4e8 c6c3 d6b5 d3b5 e8b5 c3b3 b5b3 a2b3 h8d8
nps=174483 h/p/q=22.00%/99.00%/0.00% q=73.0% bc=54%
br=1.56mp=2093/848/-986/-1196
pawnx=13476 recapx=2770 qcheckx=0 checkx=36257 qfutilx=165810 onereplyx=2860
mthrx=157 futilx=0 bmx=1307
f3e4 g6e4 b5d3 e4e8 c6c3 d6b5 d3b5 e8b5 c3b3 b5b3 a2b3 h8d8 - 10.25/25.50 0% 0/4
bf=1.65 h/p/q=26.00%/99.00%/0.00% 32.68 5450768 1362692/8/166792 62177/156
17/208/176708/976062/14353/0/1453
pawnx/recapx/mthrx/checkx/qfutilx/onereplyx/futilx/bmx
--------------------------------
Missed: 1 2 3 4
maxtime = 500



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Last modified: Thu, 15 Apr 21 08:11:13 -0700

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