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Subject: Re: Question? how to read Deep Blue logs

Author: Eugene Nalimov

Date: 21:47:04 01/26/02

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11(6) means 11 plies in software, plus 6 more in the hardware. That was
discussed here and on r.g.c.c. several times.

Eugene

On January 27, 2002 at 00:43:12, Vincent Diepeveen wrote:

>On January 26, 2002 at 20:01:22, Vine Smith wrote:
>
>>On January 26, 2002 at 08:43:41, K. Burcham wrote:
>>
>>>
>>>
>>>could you please explain     15/89
>>>    is this the same as todays programs.   is the 15 a depth value?
>>>is the 89  also a depth value, but for selected extensions that are searched
>>>deeper?
>>>
>>>what is the :24       24 minutes     24 seconds
>>>
>>>dont think it is   depth 15    with  the 89  meaning 89 minutes.
>>>
>>>
>>>another question. look at line 11 under move 25.  [TIMEOUT]
>>>wonder what the time control was set to. where they letting
>>>the deep blue operators force a move, could they do a "move now"?
>>>"timeout" referring to what, does this mean deep blue has decided
>>>to move and stop thinking for a better eval in this position?
>>>
>>>another question.  what are the ( ) values.   example (43).
>>>
>>>
>>>---------------------------------------
>>>-->  25.   Rca1 <-- 15/89:24
>>>---------------------------------------
>>>hash guess Qc7d8,Guessing Qd8
>>> 8(4) #[f4](30)[f4](30) 30^ T=0
>>>pf2f4 Pe5f4p be3f4P Nh7f6 qe2f2 Pa6a5 pb4a5P
>>> 8(6) #[f4](43)######################################### 43  T=2
>>>pf2f4 Pe5f4p be3f4P Nh7f6 qe2f2 Pa6a5 pb4a5P
>>> 9(6) #[f4](43)##<ch> 'qd8'
>>>[221 sec (main.c:1847)][cont]####################################### 43  T=33
>>>pf2f4 Pe5f4p be3f4P Nh7f6 qe2f2 Pa6a5 pb4a5P
>>>10(6) #[f4](41)##################[Kh2](42)#######[Bd1](45)############### 45
>>>T=119
>>>bc2d1 Nh7f6 qe2a2 Ra8b8 pa4b5P Pa6b5p bd1f3 Pg7g6
>>>11(6) #[Bd1](43)#[f4](46)[TIMEOUT] 46  T=234
>>>pf2f4 Pe5f4p be3f4P Rc8b8 bf4e3 Bf8e7 pa4b5P Pa6b5p be3a7 Rb8b7
>>>---------------------------------------
>>>-->  26.   f4 <-- 14/85:39
>>>---------------------------------------
>>>hash guess Pe5f4p,Guessing exf4
>>> 8(4) #[Bxf4](30)[Bxf4](30) 30^ T=1
>>>be3f4P Rc8b8 bf4e3 Bf8e7 pa4b5P Pa6b5p be3a7 Rb8b7
>>> 8(6) #[Bxf4](41)######################################### 41  T=3
>>>be3f4P Rc8b8 bf4e3 Bf8e7 pa4b5P Pa6b5p be3a7 Rb8b7
>>> 9(6) #[Bxf4](45)######################################### 45  T=17
>>>be3f4P Rc8b8 bf4e3 Bf8e7 pa4b5P Pa6b5p be3a7 Rb8b7
>>>10(6) #[Bxf4](39)######################################### 39  T=68
>>>be3f4P Nh7f6 bf4e3 Pa6a5 be3d4 Pa5b4p pc3b4P Pb5a4p bc2a4P Bf8e7
>>>11(6) #[Bxf4](39)##<ch> 'nf6'
>>>---------------------------------------
>>>thanks
>>>kburcham
>>
>>The 15/89:24 is fairly simple -- 15 moves left until next time control, likewise
>>89 minutes, 24 seconds left until next time control. The [TIMEOUT] is, I
>>believe, an internal process of the program, and not the result of operator
>>intervention; I have not read any accounts of Deep Blue operators forcing moves
>>in the manner you suggest.
>>The depth of the search can be determined by adding the two numbers at the
>>beginning of the last line of each move's log, so at move 25, Deep Blue looked
>>17 plies ahead (11+6). I think the first value, 11, is brute force search, and
>>the second value, 6, is a selective search extension of some sort.
>
>11(6) means 11 ply depth.
>
>it is theoretical impossible to search with so little nodes a second
>17 ply fullwidth without hashtables and without pruning, and we know
>that they didn't forward prune, also many comparisions from Uri Blass
>have revealed that Crafty tactical (not exactly a tactical hero)
>at 15 ply sees more than Deep Blue at 17 ply and diep at the same depth
>(because it is using singular extensions) usually sees the same things
>or more.
>
>Best regards,
>Vincent
>
>>Regards,
>>Vine Smith



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