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Subject: Re: How long to do 10 full plys? Why is 1. e4 e6 so popular?

Author: Richard A. Fowell (fowell@netcom.com)

Date: 22:30:57 02/25/99

Go up one level in this thread


On February 25, 1999 at 12:57:43, James Robertson wrote:

>On February 25, 1999 at 06:21:14, Larry Griffiths wrote:
>
>>On February 25, 1999 at 06:15:17, Andrew Williams wrote:
>>
>>>On February 24, 1999 at 17:48:23, Larry Griffiths wrote:
>>>
>>>>Greetings CCC Chess Programmers!
>>>>
>>>>How long does it take your chess programs to go 10 full plys
>>>>from whites opening move of E2-E4?
>>>>
>>>>Thanks in advance.
>>>>
>>>>Larry   :-}
>>>
>>>Hi,
>>>
>>>PostModernist completes 10 plys in 38 seconds on a Celeron 333A:
>>>
>>> 5>   -37     0      4425   e7-e5
>>> 5b   -33     0      5397   d7-d5  e4xd5  d8xd5  d2-d4
>>> 5=   -29     0      5940   d7-d5  e4xd5  d8xd5  d2-d4
>>> 6>   -29     0      7465   d7-d5
>>> 6=   -14     0     20393   d7-d5  e4xd5  d8xd5  d2-d4  d5-e4  c1-e3  e7-e5
>>> 7>   -14     0     30274   d7-d5
>>> 7=   -12     1     43681   d7-d5  d2-d3  e7-e5  e4xd5  d8xd5  b1-c3  f8-b4
>>> 8>   -12     1     77140   d7-d5
>>> 8b    -9     3    153581   e7-e5  d2-d3  d7-d6  b1-c3  g8-f6  c1-d2  c8-g4
>>> 8=    -5     5    229628   e7-e5  g1-f3  g8-f6  b1-c3  b8-c6  d2-d4  d7-d6
>>> 9>   -22    17    714347   e7-e6
>>> 9=   -16    21    878256   e7-e6  d2-d4  d7-d5  b1-c3  d5xe4  c3xe4  b8-c6
>>>10>   -16    25   1042626   e7-e6
>>>10=   -16    38   1589890   e7-e6  d2-d4  d7-d5  b1-c3  d5xe4  c3xe4  b8-c6
>>>
>>>I think it is hard to compare times because of hardware differences. I often
>>>find it is more interesting to compare the number of nodes searched in reaching
>>>a given depth.
>>>
>>>Andrew
>>
>>Well, At least my program is picking e7-e6 also.
>>Thanks for the post.
>>
>>Larry   :-)
>
>My program picks 1. ... e6 too. I wonder what about that move makes it so
>"computer-friendly".
>
>James

Hmmm ... MacChess picks 1. ... e6 as well - that's four programs.
But, I don't know what's computer-attractive about it.


  1. e4

02/01|00:00:00|          53|   -6| Nc6 d3
03/01|00:00:00|         218|   +1| Nc6 d3 Nf6
03/04|00:00:00|         428|   +2| e6 d3 Bc5
04/01|00:00:00|        1078|   -5| e6 Nf3 Bc5 d3
05/01|00:00:00|        4597|   +1| e6 d3 Nc6 Bf4 Bc5
06/01|00:00:00|       20171|   -5| e6 Nf3 Nc6 Nc3 Bb4 Bc4
07/01|00:00:01|       68769|   +1| e6 Nf3 Nc6 d3 Nf6 Bf4 Bc5
08/01|00:00:03|      261550|   -4| e6 Nf3 Nc6 Nc3 Bb4 a3 Bxc3 dxc3 Nf6
09/01|00:00:08|      902877|   +0| e6 Nf3 Nf6 Nc3 Nc6 e5 Ng4 d4 Be7
10/01|00:00:37|     4168059|   -1| e6 Nf3 Nc6 d4 d5 exd5 exd5 Bf4 Nf6 Bb5 Bd7
   ( 45 seconds to complete examining the other alternatives. )
11/01|00:01:43|    11442184|   -1| e6 Nf3 Be7 Nc3 d6 Bc4 Nf6 d3 Nc6 Bf4 Bd7

  1. ...       e6

Richard A. Fowell (fowell@netcom.com)



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