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

Author: Dann Corbit

Date: 20:20:21 03/06/06

Go up one level in this thread


On March 06, 2006 at 23:04:24, Dann Corbit wrote:

>*** Problem   Solution(s): Nxd5 (bm)
>[D] r1q2rk1/p3bppb/3p1n1p/2nPp3/1p2P1P1/6NP/PP2QPB1/R1BNK2R b KQ - bm Nxd5
>*** Problem   Solution(s): Nxd5 (bm)
>BR ** BQ ** -- BR BK **
>BP -- ** -- BB BP BP BB
>-- ** -- BP -- BN -- BP
>** -- BN WP BP -- ** --
>-- BP -- ** WP ** WP **
>** -- ** -- ** -- WN WP
>WP WP -- ** WQ WP WB **
>WR -- WB WN WK -- ** WR
>mv 1 stage 0, black to move, computer plays black
>hash=3a81fdded6269e62
>pawnhash=2466670e8a77b5de
>Alpha=-111 Beta=689 Maxdepth=9999999 MaxTime=1000
>Ply/Max Mv   Score   Time Nodes PV
> 1/ 6>f6e4 689  0.00       45 f6e4
> 1/ 6 c8d8 1117  0.01      124 c8d8
> 2/ 6 c8d7 981  0.01      256 c8d7
> 3/ 9<c8d7 580  0.02     1136 c8d7 c1d2
> 3/ 9 c8d7 537  0.03     2049 c8d7 b2b3
> 4/10 c8d7 636  0.07     4563 c8d7 g4g5 h6g5 c1g5
> 5/13 c8d8 762  0.17    13572 c8d8 g4g5 f6d7
> 6/19 c8c7 681  0.71    59228 c8c7 g4g5 h6g5 c1d2 a8b8 d2g5
> 7/19 c8a6 602  2.45   206288 c8a6 e2a6 c5a6 c1d2 a8b8 mtmt
> 8/23 c8d8 688  4.37   375249 c8d8 f2f3 a8c8 c1d2
> 9/25 Tc8d8  508 10.01   855040 c8d8 e1g1 a8c8 g1h2 g8h8 f2f3
>nps=85410 h/p/q=27.00%/97.00%/0.00% q=80.0% bc=47%
>br=3.59mp=1921/3040/-2129/-1311
>pawnx=9340 recapx=5270 qcheckx=0 checkx=10159 qfutilx=224976 onereplyx=272
>mthrx=246 futilx=0 bmx=0
>c8d8 e1g1 a8c8 g1h2 g8h8 f2f3 - 10.00/24.60 0% 0/5 bf=2.58
>h/p/q=27.80%/98.00%/0.00% 50.07 5432343 1086469/10/108499
>34809/18912/738/120154/1064146/6169/0/2714
>
>There is something very intersting here.  You have a large positive score for
>the queen move.  The best move (according to most programs) is the knight sac,
>which leads, after a convoluted exchange, to an advantage of less than one pawn.
> Perhaps you have discovered something interesting here.

Is your score reported in millipawns?  If not, then something does not make
sense with your scores up above.  Or perhaps I am reading the output wrong.

Interesting that Aristarch like c8d7 for a while:

Analysis from E:\bust.epd
3/6/2006 8:05:17 PM Level: Infinite
Analyzing engine: Aristarch 4.50

1) Nxd5;
    Searching move: Nf6xd5
    Best move (Aristarch 4.50): Nf6xd5
    identical moves! Found in: 01:35
      2	00:00	           2	2	-0.42	f6g4 ? e2g4
      2	00:00	          38	38	-3.52	f6g4 e2g4
      2	00:00	          76	76	-3.51	f6e4 !! g3e4
      2	00:00	         113	113	-3.32	f6e4 g2e4
      2	00:00	         150	150	-3.31	f6d5 !! e4d5
      2	00:00	         186	186	-3.11	f6d5 !! e4d5
      2	00:00	         222	222	-2.85	f6d5 e4d5
      2	00:00	         268	268	-2.84	a7a5 !! c1h6
      2	00:00	         303	303	-2.64	a7a5 !! c1h6
      2	00:00	         341	341	+0.11	a7a5 g3f5
      2	00:00	         387	387	+0.12	b4b3 !! a2b3
      2	00:00	         424	424	+0.18	b4b3 g3f5
      2	00:00	         530	530	+0.19	h7g6 !! g3f5
      2	00:00	         566	566	+0.24	h7g6 g3f5
      3	00:00	         705	705	+0.32	h7g6 g3f5 c8d7
      3	00:00	         903	903	+0.33	c8b7 !! g3f5 a8c8
      3	00:00	       1.090	1.090	+0.33	c8b7 g4g5 h6g5
      3	00:00	       1.153	1.153	+0.34	c8d7 !! g3f5 a8c8
      3	00:00	       1.309	1.309	+0.41	c8d7 g4g5 h6g5
      4	00:00	       3.046	152.300	+0.08	c8d7 c1d2 a7a5 a1c1
      4	00:00	       3.233	161.650	+0.09	c8b7 !! g4g5 h6g5 c1g5
      4	00:00	       3.717	185.850	+0.26	c8b7 e1g1 a8c8 g3f5
      5	00:00	      10.930	546.500	+0.14	c8b7 f2f4 e5f4 c1f4 a8c8 g3f5
      5	00:00	      11.895	594.750	+0.15	c8d7 !! c1d2 a7a5 a1c1 a8c8
      5	00:00	      13.702	456.733	+0.35	c8d7 !! c1d2 a7a5 a1c1 a8c8
      5	00:00	      18.092	603.066	+0.44	c8d7 c1d2 a7a5 a2a3 d7a4
      6	00:00	      40.018	666.966	+0.28	c8d7 c1d2 b4b3 e2c4 b3a2 b2b4 d7a4
      6	00:00	      51.968	649.600	+0.29	c8b7 !! f2f4 e5f4 c1f4 g7g5 f4c1 a8c8
      6	00:00	      62.322	692.466	+0.40	c8b7 f2f4 e5f4 c1f4 g7g5 f4d2 a8c8
      7	00:00	     176.309	705.236	-0.02	c8b7 ? h3h4 b7d7 g4g5 f6g4 f2f3 h6g5
      7	00:00	     188.594	698.496	-0.02	c8b7 h3h4 b4b3 g4g5 f6d7 g5h6 a8c8
      7	00:00	     195.383	697.796	-0.01	c8d7 !! c1d2 b4b3 e2c4 b3a2 b2b4 d7a4
b4c5
      7	00:00	     207.649	692.163	+0.19	c8d7 !! c1d2 b4b3 e2c4 b3a2 b2b4 d7a4
b4c5
      7	00:00	     261.244	725.677	+0.43	c8d7 c1d2 a7a5 g3f5 a8c8 a1c1 h7g6
      7	00:00	     306.316	729.323	+0.44	f6d5 !! e4d5 c5d3 e1d2 d3f4 e2f3 c8c2
d2e1 f4d3 e1f1
      7	00:00	     320.513	728.438	+0.64	f6d5 !! e4d5 c5d3 e1d2 d3f4 e2f3 c8c2
d2e1 f4d3 e1f1
      7	00:01	     414.511	753.656	+0.97	f6d5 g3f5 h7f5 g4f5 d5f6 c1d2 c8b7 f2f3
      8	00:01	     516.011	747.842	+0.68	f6d5 g3f5 h7f5 e4f5 c8b7 e2c4 e5e4 g2e4
c5e4
      9	00:01	     808.025	784.490	+0.89	f6d5 g3f5 h7f5 e4f5 c8b7 e2c4 e5e4 e1g1
d5f6 d1e3
     10	00:02	   1.346.429	826.030	+0.85	f6d5 g3f5 h7f5 e4f5 c8b7 e1g1 a8d8 e2c4
d5b6 c4b4 d6d5
     11	00:03	   2.503.074	848.499	+0.67	f6d5 g3f5 h7f5 e4f5 c8b7 e1g1 a8c8 e2c4
e5e4 g2e4
     12	00:05	   4.658.176	846.941	+0.25	f6d5 ? g3f5 h7f5 e4f5 c8b7 e2c4 e5e4
g2e4 c5e4 c4e4 b7b5 d1e3 d5e3 f2e3
     12	00:06	   5.760.049	853.340	+0.22	f6d5 g3f5 h7f5 e4f5 c8b7 e2c4 e5e4 g2e4
c5e4 c4e4 a8c8 d1e3 c8c5 e1g1
     12	00:08	   7.184.824	845.273	+0.23	c8d7 !! g3f5 b4b3
     12	00:18	  14.912.697	795.343	+0.43	c8d7 !! g3f5 a8c8
     12	00:29	  22.597.382	779.220	+0.38	c8d7 e1g1 f8c8 b2b3 a7a5 d1b2 e7d8 b2c4
h6h5 g3f5 h7f5 e4f5 a5a4
     13	01:12	  56.881.398	790.019	+0.47	c8d7 g4g5 h6g5 c1d2
     13	01:35	  76.500.639	805.269	+0.48	f6d5 !! e4d5 c5d3 e1d2 d3f4 e2f3 c8c2
d2e1 f4d3 e1f1
     13	01:39	  80.309.833	811.210	+0.52	f6d5 g3f5 h7f5 e4f5 c8b7 e1g1 a8d8 f1e1
b4b3 d1e3 d5f4 g2b7
     14	02:06	 102.082.343	810.177	+0.72	f6d5 g3f5
     15	04:43	 225.280.866	796.045	+1.05	f6d5 e4d5
   3/6/2006 8:15:34 PM, Time for this analysis: 00:05:00, Rated time: 01:35

1 of 1 matching moves
3/6/2006 8:15:35 PM, Total time: 12:10:18 AM
Rated time: 01:35 = 95 Seconds




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

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