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

Author: Uri Blass

Date: 12:41:07 05/08/04

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On May 08, 2004 at 13:10:10, Sune Fischer wrote:

>On May 08, 2004 at 12:39:03, Anthony Cozzie wrote:
>
>>
>>As I said before, the first two moves are "pass" moves.  I don't think they are
>>actively bad, they just do nothing.  GMs do not play pass moves.  Current top
>>programs rarely play them.  Deep Blue played 3 or 4 in a row ;)
>
>I think that depends on the position.
>Take a look at the Fritz/Junior games against Kramnik and Kasparov, I think they
>had plenty of pass moves from both programs, the Hedgehog just being one of
>them.
>
>>>Ruffian 1.0.5  UCI1 15 MB:
>>> 6   00:00 -0,01   Qa5c5 Ra1c1 Bc7d6 b3b4 Qc5b5 Nh4f3
>>> 7   00:00 -0,05   Qa5c5 Ra1c1 e6e5 g3g4 Bh5g6 Nh4xg6 f7xg6 Kg1h1
>>> 8   00:01  0,00   Qa5c5 Ra1c1 Qc5e7 Rc1a1 Qe7d6 Nh4f3 Qd6c5 Ra1c1 e6e5
>>> 8   00:02  0,03   g7g5 Nh4f3 g5g4 b3b4 Qa5a4 Nf3d4 g4xh3 Bg2xh3 Nf6g4
>>> 9   00:02  0,04   g7g5 Nh4f3 g5g4 h3xg4 Nf6xg4 b3b4 Qa5a4 Nd2b3 Nd7e5 Nf3xe5
>>>10   00:04  0,05   g7g5 Nh4f3 g5g4 h3xg4 Nf6xg4 Nf3d4 c6c5 Nd4e2 Bc7e5 Bb2xe5
>>>Nd7xe5 Ne2f4
>>>11   00:08 -0,04   g7g5 Nh4f3 g5g4 h3xg4 Nf6xg4 c2c4 d5xc4 Nd2xc4 Qa5f5 e3e4
>>>Qf5c5 Kg1h1
>>>11   00:16 -0,02   Qa5c5 Ra1c1 g7g5 Nh4f3 g5g4 d3d4 Qc5b5 c2c4 d5xc4 h3xg4
>>>Nf6xg4 Rc1xc4
>>>
>>>How deep is the fail-low for Zappa on g5?
>>>A "blunder" should be >1 pawn, IMO.
>>
>>Ruffian plays g5 for all of 8 seconds :)  Deep Blue had 3 minutes to think.
>
>Here is a bit longer analysis, it switches back:
>
>Ruffian 1.0.5  UCI1 62 MB:
> 7   00:00 -0,05   Qa5c5 Ra1c1 e6e5 g3g4 Bh5g6 Nh4xg6 f7xg6 Kg1h1
> 8   00:01  0,00   Qa5c5 Ra1c1 Qc5e7 Rc1a1 Qe7d6 Nh4f3 Qd6c5 Ra1c1 e6e5
> 8   00:02  0,03   g7g5 Nh4f3 g5g4 b3b4 Qa5a4 Nf3d4 g4xh3 Bg2xh3 Nf6g4
> 9   00:03  0,04   g7g5 Nh4f3 g5g4 h3xg4 Nf6xg4 b3b4 Qa5a4 Nd2b3 Nd7e5 Nf3xe5
>10   00:04  0,05   g7g5 Nh4f3 g5g4 h3xg4 Nf6xg4 Nf3d4 c6c5 Nd4e2 Bc7e5 Bb2xe5
>Nd7xe5 Ne2f4
>11   00:09 -0,04   g7g5 Nh4f3 g5g4 h3xg4 Nf6xg4 c2c4 d5xc4 Nd2xc4 Qa5f5 e3e4
>Qf5c5 Kg1h1
>11   00:16 -0,02   Qa5c5 Ra1c1 g7g5 Nh4f3 g5g4 d3d4 Qc5b5 c2c4 d5xc4 h3xg4
>Nf6xg4 Rc1xc4
>12   00:38 -0,04   Qa5c5 g3g4 Bh5g6 Ra1c1 Bg6h7 Kg1h1 e6e5 Nh4f5 Bh7xf5 g4xf5
>g7g6 f5xg6 f7xg6 Rf1g1
>12   00:48  0,01   g7g5 Nh4f3 g5g4 h3xg4 Bh5xg4 d3d4 Qa5b5 a3a4 Qb5b6 e3e4 d5xe4
>Nf3h2 Bg4f5 Nd2xe4
>13   01:38 -0,02   g7g5 Nh4f3 g5g4 h3xg4 Nf6xg4 Nf3d4 Qa5b6 f2f3 Ng4f6 g3g4
>Bh5g6 Kg1h1 c6c5 Nd4e2
>14   04:02  0,03   g7g5 Nh4f3 g5g4 h3xg4 Nf6xg4 e3e4 e6e5 e4xd5 c6xd5 c2c4 Ra8e8
>Nf3h4 Nd7f6 c4xd5 Nf6xd5 Nh4f5

I can add that movei likes g5 as the best move for black so I do not believe
that it is a blunder.

The people who claim that it is a blunder did not show how to beat chess program
after this blunder so I cannot take their analysis as serious.

I will take analysis of GM's as serious if after claiming that a move is a
blunder they will give a game to show how they beat chess programs after the
blunder.

Uri



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