Author: James T. Walker
Date: 05:19:57 04/01/99
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On April 01, 1999 at 06:24:43, Sylvain Renard wrote: >On March 31, 1999 at 18:01:28, James T. Walker wrote: > >>Hello again Sylvain, >>Obviously you know more about these things than I do. As I said in an earlier >>post I'm not a programmer or even a good chess player. But I still keep coming >>back to the CD ROM as the problem. I don't know if Fritz uses Ken Thompsons >>database or what. Fritz does not do a normal "search" on this move. Fritz >>seems to read the CD ROM and then make the wrong move. The info which shows up >>in the move window indicates Fritz has incorrect information about the value of >>the moves in the move list. Where do these values come from? All moves have a >>score of draw so it does not matter which one it plays. Evidently the first >>move "generated" or looked at is f8=B and it plays that move. > Hello again, >when reading the databases, if the position reached is not found, Fritz has to >assume it is a draw. What else could it do? I think they did not think >it was useful to include all the files resulting from an underpromotion. > > >>Fritz 5.32 with >>the Fritz 5.32 CD ROM does not play that move. It correctly has the score as >>(8) 1.f8=R. Why does Fritz play the move correctly with the new CD ROM but >>incorrectly with the old CD ROM? > ?? I must have the old CD ROM because my Fritz 5.32 shows 0 as the score >after f8=R. Could you look at the files in the root directory of your CD >and tell me if the file Rr_r.g is present on your CD? Thank you. > >> Fritz does not go back to a regular search >>routine untill after the f8=B move. > This is a bug on my Fritz5.32 because it has the file Rb_r.g on the CD >and does not use it when you enter a corresponding position. > > Best regards, > Sylvain Hello again Sylvain, Have you updated to the "March SP1" at Chessbase/Germany? Anyway here is a list of all endgame files on my CD ROM. Pq_q.g Pr_r.g Q_pr.g Qr_q.g Qr_r.g Rb_r.g Rn_r.g So the Rr_r.g is not on the endgame CD. As I have said I don't see where this is necessary since when you get to this position any program can win from there. Since Fritz only searches the CD at the root you would have to already be into this endgame before Fritz would search the CD and at that point it is not necessary. Fritz must make the proper decision of promotion before exiting the Pr_r.g file. It is still a KRP vs KR untill after the promotion in my opinion and this file must have the correct info for this to work. Jim Walker
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