Author: Vincent Diepeveen
Date: 19:51:20 10/27/03
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On October 27, 2003 at 21:29:54, Dann Corbit wrote: >Rather than a conspiracy, I suspect that there is still a small degree of >randomness in opening book lines. What a nonsense are you assuming here? Which conspiracy have you invented now? I ask just a single question. That's all. Then some Uri blass goes spit all kind of a nonsense and after a lot of weird replies Jeroen decides that the replies contained too much foolishness. >Will Diep play the exact same line over and over again given the same sequence >of opponent moves? If you play 1.e4 against Kure in world champs , with 100% sureness you'll get Najdorf. If you play black against DIEP world champs 2003 with 100% sureness you'll get 1.d4 Like most i have a special 'tournament mode' which i just use in tournaments, don't you? >I guess not. Wrong guess. Only search is parallel so not predictable 100%, though usually the same move comes out. It might be different a few seconds. If you have a very well prepared opening, even the strongest GMs on the planet cannot avoid playing that line over and over again. Kramnik has at most 2 openings which he plays really a lot at the highest level. Surprises happen very little. He won't answer caro-kann just like that, to give an example after 1.e4. If you study the world top computerchess games, you will see that Noomen is the person who surprises most. The other opening book makers have a lot less surprises and simply prepare their lines very well. I hope you realize that i do not say whether that is GOOD or BAD. I am neutral in that. If arturo says: "and we go play 1.h3 against movei because a losing move wins against this engine", then we go 1.h3 against movei. >Probably, it is something like this: > >if (r=(rand()%32117) <= 22481) 1. e4 >else if (r <= 29000) 1. d4 >else if (r <= 30000) 1. Nf3 >else 1. c4 nothing is above 100% in my book. And in the chesspartner book that isn't the case either in tournament book. No randomness. not at all. There is at most 2 choices or so in certain lines in Jeroen's book or so. >Or something of that nature. > >But if I were to write a chess database connected to a chess program, I would >most definitely do a lookup for the weakness of the opponent and open with that >(whatever it was). If I did not have enough games for a statisically >significant answer, I would probably do something like the above. No tournament book of commercial programs are using random books of course. The CAP book which gets crushed like peanut, the very old PGN generated diep book which was crushed like peanut and so on, they all proved that very clearly in the past. It is entirely hand created those tournament books. Random Statistics do not apply therefore. >Of course, I might throw in 1. b4 just for fun. When was the last time you won a game playing random moves in the world champs? Best regards, Vincent
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