Author: Matthew Hull
Date: 09:19:37 03/02/05
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On March 02, 2005 at 10:26:35, Tord Romstad wrote: >Hi Paul, > >Gothmog is my old engine, which has been in development for several years. >It is big, horrendously complicated, and very buggy. The source code is >ugly and almost completely unreadable. During last year I finally resigned >myself to the fact that the program was far beyond salvation, and that to >continue working on it would be a waste of time. > >Glaurung is a completely new project, started early in the autumn last year. >The current version is still a very basic and minimalistic chess program. >It is designed to be simple, clear, and compact. I have made an effort to >keep the code and data size small, even when there is an expense in terms >of speed. I also try to keep the code and data structures sufficiently >general to handle board shapes and sizes different from the rectangular 8x8 >board. There is a (not yet public) version of Glaurung which plays Glinski's >hexagonal chess. > >Unlike Gothmog, Glaurung is an open source program. > >On March 01, 2005 at 14:53:29, paul bedrey wrote: > >>I know they are both UCI. > >Yes. Gothmog also supports xboard/Winboard, while Glaurung is UCI only. > >>I assume Gothmog is stronger since it has been around longer although I've seen >>a list that reports Glaurung as about 2550 which is where Gothmog was. > >At fast time controls, Glaurung is definitely stronger. At slow time controls, >there is some evidence that Gothmog might still have an edge, although there is >not yet enough data to be entirely sure. I hope the next Glaurung version will >be clearly stronger at all time controls. > >The two programs have somewhat different strengths and weaknesses. Glaurung >is tactically faster, but has much less chess knowledge (especially in the >endgame). > >>My question concerns style. Does Glaurung play the same aggressive style as >>Gothmog? > >I definitely want Glaurung to play the same aggressive style as Gothmog, but >the very low popularity of Glaurung compared to Gothmog indicates that I >have not quite reached this goal yet. The reason is probably that Glaurung >still lacks too much chess knowledge. > >To some extent, it is possible to tune Glaurung's aggressiveness by modifying >the "King safety weight" parameter. Higher values should result in more >aggressive play. By the way, I am not at all sure that the default value >of this parameter is the strongest. Does Glaurung use the same search strategy as Gothmog? IIRC Gothmog uses MTD(f), or is this incorrect? Thanks, > >Tord
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