Author: Ulysses Omycron
Date: 10:50:52 01/03/05
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On January 03, 2005 at 07:36:58, chandler yergin wrote: >>If 0.50 meant neither side has advantage, then an engine could pick any move at >>random as long as it doesn't goes below/avobe the 0.50 margin to give the enemy >>advantage. They wouln't since they'd lose, just try it in CB's friendly mode in >>where choosing 0.50 has this effect, 1.00 is just slightly better than 0.99, > >Slightly better, means that with a 1.0 one player IS NOW a full pawn ahead. Uri already explained why I should not bother to reply, but I have a spirit similar at yours, that wants to prove himself right. To reply at the last sentence, there programs that can be tweaked so a pawn is not worth 100. It can be 90 as an example (This value is used by Prodeo's GrandMaster's personalities and it seems very good). So a 0.90 means one player IS NOW one pawn ahead. Also, programs tend to evaluate a pawn differently depending if it's position, if it's backwards, passed, connected, etc. So you cannot define a full pawn, and so you cannot say 1.00 is a full pawn. >No game is won or lost by "hundredths" of a pawn. You may change the programs' behavior so it forfeits once it gets a -0.99 score, so your statement is theorically wrong. In real life, grandmasters have forfeited in won positions, so it doesn't matter who is winning and by how much, we are just talking that a draw means no advantage for either side. >No game is Won by a "Partial" piece either. >A Bishop, or Knight is evaluated at 3.0 Pawns; Rook at 5 pawns >until the eval is 3.0 or better, no player is a full piece ahead. Let's suppose you're right. So when is a game won? When the program forfeits on a lost position like -7.50 and the interface adjudicates a win for the winning side? No? Then it is won by checkmate? Let's suppose the king is worth 100.00 so when you checkmated it, your score is 100.0 since all the other pieces you captured don't matter, you've won. Then 100.0 is the only score that matters because no game is won by a full piece either, so a score of -19.00 (A queen and two rooks) is not a game won, and thus it's a draw since noside has an advantage. (I'm just multiplying your statement by 100 and it seems to not make sense, you have to say when is the game won and when a side has an advantage, on pawn ahead is as good as 0.99 score ahead). I'm doing just what you're doing so you can see how you look posting stuff like that on a forum. Take care, and don't write to strangers on a forum ;o
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