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Article #5445Transposition tables in Gnuchess 4.0
From: Kong Sian
Date: Thu, 15 Jul 1993 06:14
Date: Thu, 15 Jul 1993 06:14
7 lines
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1172 bytes
I have an observation to make regarding the transposition table in Gnuchess 4.0 pl62. The codes in ProbeTTable() and PutInTTable() uses a value of 0 in the depth field to indicate whether the entry in the table is empty of not. However, as far as I can make out, it is possible for the search to save the position, score and move into the table when depth=0. There is thus an ambiguity with the use of 0 to indicate if an entry is empty. A 0 entry could also mean an entry with depth=0. This doesn't really affect the strength of gnu by much, but hey, lets work towards good code. Kong Sian
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10d71d,3a5221bd32ac7fe0,start X-Google-Attributes: gid10d71d,public X-Google-ArrivalTime: 1993-07-15 00:13:58 PST Path: arc1-ca.pugleaf.net!gmd.de!newsserver.jvnc.net!newsserver.technet.sg!nuscc.nus.sg!kongsian From: kongsian@nsrc.nus.sg (Kong Sian) Newsgroups: gnu.chess Subject: Transposition tables in Gnuchess 4.0 Date: 15 Jul 1993 06:14:07 GMT Organization: National University of Singapore Lines: 7 Message-ID: <222sjf$el8@nuscc.nus.sg> NNTP-Posting-Host: aba.nsrc.nus.sg X-Newsreader: TIN [version 1.2 PL0]