Author: Jeremiah Penery
Date: 08:25:49 10/17/99
Go up one level in this thread
On October 17, 1999 at 02:50:14, Ratko V Tomic wrote:
>>> 1. d4 d5 2. c4 e6 3. cxd5 exd5 4. Bf4 Bb4+ 5. Nc3 Nf6 6. e3 Nc6 7. Bb5
>>
>> 9-> 16.35
>>10-> 46.00 (EBF from 9->10 = 2.81)
>>11-> 2:46 (EBF from 10->11 = 3.61)
>>12-> 9:39 (EBF from 11->12 = 3.49)
>>Average EBF is 3.30333...
>>
>>Jeremiah
>
>Now I see that Fritz UI shows total nodes (for all iterations to a given depth).
>So I subtracted total nodes (and total times) shown for successive depths to get
>nodes evaluated at given depth setting, and here are the figures I get with
>Crafty 16.6 (on Celeron 400Mhz, 64Mb hash):
>
> Depth Tot.kN Delta.kN BF Time[s] kN/s
> --------------------------------------------
> 8 2243 .... .... 11 ...
> 9 4705 2462 5.13 23 205
> 10 11557 6852 4.83 57 202
> 11 38582 27025 4.74 189 205
> 12 119442 80860 4.56 579 207
> --------------------------------------------
>
>So the branching factors are 4.6-5.1, a bit larger spread than the earlier one
>(because now I included 8->9 which is the largest here, the others didn't change
>much). So it seems we get quite different BF. What version is your Crafty and
>does it show total nodes evaluated? Could you provide the node figures? I have
>used all default settings.
I can do this. :) I'm using a modified Crafty 16.19 on a PII-300.
Depth Tot.kN Delta.kN BF Time[s] kN/s
--------------------------------------------
8 1044 .... .... 9.5 110
9 2121 1123 .... 18.5 115
10 5782 3661 .... 47.75 121
11 15431 9649 .... 124 124
12 62174 46743 .... 495 125
--------------------------------------------
(Since you're calculating BF differently, I left these blank.
>Now that I was at it, I also tested Fritz 5.32, Hiarcs 7.32 and Rebel 10c on the
>same position. For Hiarcs & Rebel I didn't do depth 12, since 11-ply already
>took too long. Rebel and Hiarcs selected Bd3 move while Fritz and Crafty
>selected Bb5 (which was my move in the game), at all levels for all programs.
> Rebel 10c:
>
> Depth Tot.kN Delta.kN BF Time[s] kN/s
> --------------------------------------------
> 8 3243 .... .... 22 ...
> 9 6353 3110 5.26 45 135
> 10 18652 12209 5.11 135 136
> 11 56967 38405 4.89 410 140
> --------------------------------------------
>
>
>So none is getting BF close to 3.
Isn't the Effective Branching Factor equal to the time it takes for ply N
divided by the time it took for ply N-1? I see that I may be calculating this
differently than you are. I'll use your Rebel table above to show what I did.
> Rebel 10c:
>
> Depth Tot.kN Delta.kN BF Time[s] kN/s
> --------------------------------------------
> 8 3243 .... .... 22 ...
^^
Is this the total time up to that ply, or the time for just that ply, after
subtracting the ply 7 search?
> 9 6353 3110 5.26 45 135
By the time between ply 9 and 10 (45s to 135s), I would put the branching factor
at 3.
> 10 18652 12209 5.11 135 136
^^^^^
12209/3110 is not 5.11. Neither is 135s/45s. . . . How are you getting 5.11 for
this Branching Factor?
Jeremiah
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