Author: Vincent Setterholm
Date: 14:18:06 06/11/00
Go up one level in this thread
On June 11, 2000 at 17:16:30, Vincent Setterholm wrote: >On June 11, 2000 at 06:51:09, Enrique Irazoqui wrote: > >>On June 11, 2000 at 05:12:03, Vincent Setterholm wrote: >> >>>On June 11, 2000 at 03:44:10, Vincent Setterholm wrote: >>> >>>>I was running Chessbase 7 with Fritz 6a running analysis. I have the Endgame >>>>Turbo CD's installed on my harddrive. I ran into a three piece endgame position >>>>where Fritz gave really messed up analysis. >>>> >>>>Black king on c1. White king on C3. White rook on a5. White to move. Ra1 is >>>>mate. >>>> >>>>Fritz called that position a mate in three. The move before this one Fritz >>>>correctly called a mate in 2, but once the proper moves were made, its analysis >>>>got all goofy. >>>> >>>>When I go directly into Fritz (not in Chessbase) I cannot duplicate this >>>>problem. It sees Ra1 right away. >>>> >>>>Any ideas as to what is going on? >>>> >>>>Thanks! >>> >>>I was incorrect when I stated that Fritz called the above position Mate in 3. >>>It calls the possition a mate in 2, when if you follow it's suggested move, it >>>is actually a mate in 3. >>> >>>But it gets worse. The following is a transcript of a variation I played out, >>>following Fritz's best reccommendation for moves: >>> >>>1. Rb5 Kd1. >>>2. Re5 Kc1. >>>3. Rd5 Kb1. >>>4. Ra5 Kc1. >>>5. Rb5 Kd1. >>>6. Re5 Kc1. >>>7. Rd5 Kb1. >>>8. Ra5 Kc1. >>>9. Rb5 Kd1. >>>10. Re5 Kc1. >>>11. Rd5 Kb1. >>>12. Ra5 Kc1. >>>13. Rb5 Kd1. >>>14. Re5 Kc1. >>>15. Rd5 Kb1. >>>16. Ra5 Kc1. >>> >>>Fritz NEVER went in for the kill. It just kept seeing mates 2 moves out. >>> >>>Black can draw by threefold repetition or by the 50 move rule! >>> >>>Anyone have ideas as to what's happening here? >>> >>>>Vince. >> >>With your same setup (CB7, Turbo CDs and F6a), I can't reproduce your problem. I >>get +-(Mate in 1) 1.Ra1# (0:00:00) depth 2/2. >> >>Enrique > >What seems to be happening to me is that Fritz' analysis while playing one side >is correct, where when it becomes the next players turn, the analysis is >incorrect. I just analyzed another game where White could draw by perpetual >check. Fritz saw white's potential for draw when it was White to play, and >correctly evaluated the position as =0.00, but when it became black's turn, the >eval shifted to -2.22 even though white had played the correct move. Once black >makes his best move, the analysis shifted back to =0.00. Any ideas on that one? Just to clarify, all of these problems are only happening when I am running Fritz within Chessbase. Fritz alone solves the positions correctly.
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