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Subject: Re: Behind Deep Blue: 3rd print with new Hsu afterword

Author: Anthony Cozzie

Date: 07:50:57 05/08/04

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On May 08, 2004 at 07:18:27, Vasik Rajlich wrote:

>On May 08, 2004 at 04:34:40, Sune Fischer wrote:
>
>>
>>>>You are absulutely right.
>>>>It is obvious that humans already solved chess so they know if a move is a
>>>>blunder or not a blunder so you can be sure that all the question marks are
>>>>correct.
>>>>
>>>>It is also obvious that the number of mistakes is what decides the game so if
>>>>your opponent did 2 mistakes you can let yourself to do one mistake like letting
>>>>him to force mate and you are not going to lose.
>>>>
>>>>:_(
>>>>
>>>>Uri
>>>
>>>You know, Uri, I have never seen you do anything but post how other people are
>>>wrong (never with any reasons of course).  Many other people have noticed your
>>>unending flood of negativity.  It is difficult to consider this post as anything
>>>other than a flame.  It appears I am going to have to take off the kid gloves
>>>and dispose of you.
>>
>>Isn't it natural to only post if you disagree?
>>
>>Anyway, I suspect Uri has a point.
>>It's not unusual for computers to play "unatural" moves, just think of the
>>Hedgehog Junior played against Kasparov.
>>
>>All the time the GM's were saying how strange Junior's moves were, how "it
>>showed no understanding of the position" blah blah blah.
>>
>>So please explain why Kasparov suddenly had to fight for a draw after 10
>>questionmark moves from Junior!
>>
>>-S.
>
>I never thought this day would come - but I agree with Uri here. :-)
>
>Sports aren't about beautiful play. Sports are about winning. If someone is
>playing ugly, and winning, then it's your sense of aesthetics which needs to be
>reviewed.
>
>Computers have a long history of winning ugly. In the recent Fritz-Kasparov and
>Junior-Kasparov matches, the machines made many many more "mistakes" (according
>to human opinion) than Kasparov. But - if these mistakes aren't punished - are
>they really mistakes? Is it a mistake to leave Shaq wide open for three point
>shots? (Or send him to the line for "free" throws?) It's impossible to speak
>about objectivity here. You can only look at the results.
>
>Vas

Let's take a look at some of the moves the annotator didn't like:

[D]r2q1rk1/pp1n1ppp/2pbpn2/3p3b/8/1P1PPNPP/PBPN1PB1/R2Q1RK1 b - - 0 10

Zappa plays the obvious 10 ...e5.  Deep Blue played 10 ...h6.  I won't call this
a bad move, but it's clearly a pass move.

1... e6-e5 2. e3-e4 Rf8-e8 3. Rf1-e1 Ra8-c8 4. a2-a4 h7-h6 5. Bb2-c3 Qd8-c7 6.
a4-a5 Bd6-c5 7. Qd1-b1
 = (0.25)       Depth: 12/34    00:01:09.00     41299kN

[D]r4rk1/pp1n1pp1/2pbpn1p/q2p3b/8/PP1PPNPP/1BPN1PB1/R3QRK1 b - - 0 12

Once again Zappa wants e5.  Deep Blue played Bc7, which is a pass move at best,
and I would think the bishop is actually better on D6.

1... e6-e5 2. c2-c4 Qa5-a6 3. d3-d4 e5-e4 4. Nf3-h4 Ra8-e8 5. Nh4-f5 Bd6-c7 6.
Ra1-c1 Nd7-b6 7. c4xd5 Nb6xd5
 = (0.24)       Depth: 11/32    00:00:49.38     30722kN

[D]r4rk1/ppbn1pp1/2p1pn1p/q2p3b/7N/PP1PP1PP/1BPN1PB1/R3QRK1 b - - 0 13

And Zappa is still dying for e5 :)  Deep Blue played g5?, which cannot be
considered anything but a blunder.

1... e6-e5 2. c2-c4 Ra8-d8 3. c4xd5 Nf6xd5 4. d3-d4 f7-f5 5. Nh4xf5 Rf8xf5 6.
e3-e4 Rf5-g5 7. e4xd5 c6xd5
 = (0.26)       Depth: 11/32    00:00:42.90     26529kN

Lets be clear: no one will ever know exactly how strong Deep Blue was.  All we
have are the games, and those are not convincing.

anthony



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