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Subject: Re: Huge Bug in Fritz 9 (Engine)

Author: Rick Hagen

Date: 12:46:04 10/18/05

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On October 18, 2005 at 14:49:41, chandler yergin wrote:

>On October 18, 2005 at 12:11:56, Drexel,Michael wrote:
>
>>[D]1n1r3k/1p1n4/2p5/8/3B4/8/4K3/R7 b - - 0 1
>>
>
>It's not, and it's not a Bug.
>Right click in your analysis window, you will get a menu
>One of the selections is 'scroll main line'
>If this is checkmarked you will get what you posted.
>Click on 'scroll main line again', this deactivates it, and you will see the
>normal PV Analysis.
>
>>

It is a bug for sure Chandler.
New game, Blitz:5' Netherlands
1n1r3k/1p1n4/2p5/8/3B4/8/4K3/R7 b - - 0 1

Analysis by Fritz 8: (20 sec)

1. -+ (-4.50): 1...Kh7 2.Kd3 b5 3.Rh1+ Kg6 4.Kc2 c5 5.Be3 Kf5 6.Rf1+ Ke4 7.Re1
Kd5
2. -+ (-4.47): 1...Kg8 2.Ra7 b5 3.Be3 Kf7 4.Kd2 Ke6 5.Kc2 Kd5 6.Bg5 Rg8 7.Be3
3. ³ (-0.43): 1...Ne5 2.Bxe5+ Kh7 3.Ra7 Nd7 4.Rxb7 Kg6 5.Bc3 Kf5 6.Rb1 Ke4
7.Rb4+ Kd5 8.Kd2

New game, Blitz:5' Netherlands
1n1r3k/1p1n4/2p5/8/3B4/8/4K3/R7 b - - 0 1

Analysis by Fritz 9: (20 sec)

1. ³ (-0.40): 1...Kg8 2.Rb1 b5 3.Bg1 Ne5 4.Be3 Re8 5.Ba7 Nd3+ 6.Kd2 Re1 7.Rb3
Re2+ 8.Kd1 Nd7
2. ³ (-0.40): 1...Kh7 2.Rb1 b5 3.Bg1 Ne5 4.Be3 Nbd7 5.Rh1+ Kg6 6.Rg1+ Kf5 7.Rb1
Nd3 8.Kd2
3. ³ (-0.39): 1...Ne5 2.Bc3(#?$) b5 3.Rb1 Kg7 4.Ba1 Na6

Has nothing to do with 'scroll new move' deactivated or not:

New game, Blitz:5' Netherlands
1n1r3k/1p1n4/2p5/8/3B4/8/4K3/R7 b - - 0 1

Analysis by Fritz 9: (after 20 sec)
(Scroll main line deactivated)
1...Ne5 2.Bc3 b5 3.Rb1 Kg7 4.Rb3 Kg6 5.Rb1 Na6
³  (-0.40)    Depth: 12/28   00:00:03  3620kN

Fritz9 gives this result both in chessprogram8 and cp9

Good find Michael!

Rick




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