Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Fritz 6 repetition bug?!

Author: Uri Blass

Date: 10:10:25 09/09/01

Go up one level in this thread


On September 09, 2001 at 12:26:35, Torstein Hall wrote:

>After the following moves we reach this position:
>
>
>Kasparov,G (2851) - Shirov,A (2751) [C11]
>Fujitsu-Siemens Giants Frankfurt GER (3), 23.06.2000
>[Fritz 6 (180s)]
>
>C11: French: Classical System: 4 e5 and 4 Bg5 dxe4
> 1.e4 e6 2.d4 d5 3.Nc3 Nf6 4.Bg5 dxe4 5.Nxe4 Nbd7 6.Nf3 Be7 7.Nxf6+ Bxf6 8.h4
>0-0 9.Bd3 c5 10.Qe2 cxd4 11.Qe4 g6 12.0-0-0 Qa5 13.Bxf6 Nxf6 14.Qxd4 Nh5 15.a3
>Rd8 16.Qe3 Bd7 17.g4 Nf6 18.Qf4 Nd5 19.Qh6 Nf6 20.Ng5 Bc6 21.Bxg6 hxg6 22.Nxe6
>fxe6 23.Qxg6+ Kh8 24.Qxf6+ Kh7 25.Rhe1 Rxd1+ 26.Rxd1 Qc5 27.g5+- Rf8 28.Qh6+ Kg8
>29.Qxe6+ Kg7 30.Qh6+ Kg8 31.Qg6+ Kh8 32.Qh6+ Kg8
>
>[D]5rk1/pp6/2b4Q/2q3P1/7P/P7/1PP2P2/2KR4 w - - 0 33
>
>When Fritz has the gamescore it wants to play 33.Rd6 whish probably wins, but
>takes a lot longer. If the game score is not given to Fritz it want to play
>33.Qe6+ like Kasparov did. This must be a repetition bug?!

No
This is no bug
Fritz was designed to play games and not to analyze them.

In a game Fritz is not going to miss 30.Rd6 so this problem is not relavent.

note that I know about a repetition bug of Fritz6 and Fritz6a drew a
correspondence game with Steve Ham because of a repetition bug.
Fritz evaluated itself as better but let Steve Ham to get a draw by repetition
because of the bug.

I do not know if Fritz could win without the bug because it had no plan but the
bug helped Steve Ham to get an easy draw.

Uri



This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.