Author: Ed Schröder
Date: 01:39:45 06/24/98
Go up one level in this thread
>Posted by Don Dailey on June 23, 1998 at 17:45:56: >In Reply to: Re: Rebel's anti-GM option posted by Ed Schröder on June 23, >1998 at 14:36:49: >On June 23, 1998 at 14:36:49, Ed Schröder wrote: >>>Posted by blass uri on June 23, 1998 at 10:27:58: >>>your descreption in your homepage: >>>"In Other words Rebel(using anti-GM) does not need to know the sacrifice >>>is 100% correct for this position, Rebel smells the chance of an attack >>>and goes for it" >>>the example shows Rebel10(not using anti-GM) can miss Rxe6 >>>assuming I do not have a long time >>>Uri >>Yes and no, it depends. The anti-GM style is not about tactics. The given >>position from my home page is just an example to show what anti-GM is able >>to. To pick a "good" example a tactical position is usually much more >>self-explaining than a quiet position. >>An example of a more quiet position... >>r2qkbnr/pp1n1ppp/2p5/4p3/3pP3/5BNP/PPPP1PP1/R1BQ1RK1 b >>BR .. .. BQ BK BB BN BR >>BP BP .. BN .. BP BP BP >>.. .. BP .. .. .. .. .. >>.. .. .. .. BP .. .. .. >>.. .. .. BP WP .. .. .. >>.. .. .. .. .. WB WN WP >>WP WP WP WP .. WP WP .. >>WR .. WB WQ .. WR WK .. >>01:26 09.36 0.00 g8-f6 d2-d3 d7-c5 f3-g4 d8-b6 (R10) >>00:48 09.36 0.07 d4-d3 b2-b3 d3-c2 d1-c2 d7-c5 (R10 + anti-GM) >>The above is a game fragment of one of Rebel's games at Aegon 1989. >>Rebel then played the (IMO) ugly 1..d3 Of course the move has advantages >>but personally I clearly prefer the quiet 1..Nf6 (do not attack while >>you are behind in development) >>Rebel since 1989 has always been in love with this 1..d3 move. Only after >>a deeper search Rebel switches to 1..Nf6 However Rebel10 using anti-GM >>will deepen its love for 1..d3 even more and never will switch to 1..Nf6 >>as it fits in the principals of the anti-GM style. >>I guess I have to live with it. I am curious what other programs play. >>- Ed - >Hi Ed, >Can you tell me what the anti-GM principles are? Are they general >to anti-human or they aimed specifically at Grandmasters? Hi Don, I would say both see my comments about Aegon in another posting. I found some patterns how GM's play against computers known as anti-COMP play and now I like to shoot back with anti-GM :) The anti-GM option is NOT the 7th world wonder (yet?!). It's a new development and like every new development (learning comes to mind) it will take years to improve. Since it's my intention to organize such matches once a year the anti-GM principals will have my further attention and will be improved for the future as otherwise you have no chance at all against giants like Anand. >Here are a couple anti-human algorithms I have used, I don't know >how useful they are but they seem to help slightly: > 1. Computer gets bonus for 1st and 2nd pawn exchanges (to get > active play) > 2. Computer gets anti-trade-down bonus to encourage pieces to > stay on the board. > 3. Computer gets penalty for pawn rams (pawns butting heads) Thanks for hints :) >Both must be pretty small so as to not encourage stupid moves >but only give a general direction to "break ties." >I have not thought deeply about others. I am interested in yours >if you can share them, or others people may have. >I view all of these algorithms as very slightly weakening the play >of the computer, if I considered them optimum then the program >would always use these algorithms. The idea is to change the style >slightly to favor open positions again people. >- Don >P.S. Cilkchess seems to like Ngf6 in your example from 3 ply on. > It never considers d6. I don't consider this as having any > real significant and I would trust Rebel's positional feel > more than Cilkchess. It is unclear to me which is better, > I kind of like d6 myself! What actually happened in the > Aegon game? Did d6 prove to be a good move? As far as I remember it was an Aegon 1989 (or 1990) game against Lex Jongsma (dutch journalist of the Telegraaf). Lex always playing his favorite anti-COMP opening 1.Nc3 I remember Rebel played on a slow Archimedes RISC computer at 8 Mhz. I forgot about the end result of the game. All I remembered I disliked 1..d3 very much so I put it in my database and I fear it has to stay there for a few more years :) - Ed -
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