💡📝Sam Trenholme wrote on Sat, Sep 26, 2009 05:41 PM UTC:
H.G.Muller wrote:
Sam: The most obvious difference is that Joker80 likes c2-c4 quite a lot, while ChessV thinks it a pretty poor move.
Well, lets look at the ChessV 0.9.0 + Human tweaking opening book 1. c3, 1. Nd3, 1. e4, and 1. f4; I will probably do black responses to 1. Ng3 tonight.
And compare it with Joker80’s 12-ply opening book, where it thinks White’s five best moves are: 1. e4 (PV +.05 pawns), 1. c4 (+.05 pawns), 1. c3 (PV +.04 pawns), 1. g4 (PV +.02 pawns), and 1. f3 (PV +.01 pawns). Observe that there are no Knight openings in Joker’s list, and that it thinks 1. f3 (+.01 PV) is better than 1. f4 (+.00 PV, or equality). In addition, Joker80 likes 1. g4 more than ChessV does.
So, there are some significant differences between the openings Joker80 likes and the openings ChessV likes. Both opening books look reasonable; Capa variants have a somewhat higher branching factor than FIDE chess (after White and Black move once in FIDE chess, there are 400 possible positions; in the Schoolbook Capa setup, that number is 784), so I would not be surprised if there are more reasonable openings than in FIDE Chess.
I retract my statement that there is no value in setups where we randomly advance pawns for both sides one square (if we advance White’s c pawn, we advance Black’s c pawn, for example). In FIDE chess, it increases the number of openings by 256; with Capa arrays, it increases the number of openings by 1024 and computer analysis can tell us if certain pawn advancements make for usable opening setups.
Again, I will finish up my ChessV 0.9.0 analysis of the Schoolbook opening setup over the next few days and should have a final opening list up soon.
Sam: The most obvious difference is that Joker80 likes c2-c4 quite a lot, while ChessV thinks it a pretty poor move.
Well, lets look at the ChessV 0.9.0 + Human tweaking opening book 1. c3, 1. Nd3, 1. e4, and 1. f4; I will probably do black responses to 1. Ng3 tonight.
Here is the opening book I have so far:
1. c3 Ng6
1. c3 e5
1. c3 e6
1. Nd3 f5
1. Nd3 Nd6
1. Nd3 Ng6
1. e4 e5
1. e4 Ng6
1. e4 d5
1. f4 f5
1. f4 Nd6
1. f4 c6
And compare it with Joker80’s 12-ply opening book, where it thinks White’s five best moves are: 1. e4 (PV +.05 pawns), 1. c4 (+.05 pawns), 1. c3 (PV +.04 pawns), 1. g4 (PV +.02 pawns), and 1. f3 (PV +.01 pawns). Observe that there are no Knight openings in Joker’s list, and that it thinks 1. f3 (+.01 PV) is better than 1. f4 (+.00 PV, or equality). In addition, Joker80 likes 1. g4 more than ChessV does.
So, there are some significant differences between the openings Joker80 likes and the openings ChessV likes. Both opening books look reasonable; Capa variants have a somewhat higher branching factor than FIDE chess (after White and Black move once in FIDE chess, there are 400 possible positions; in the Schoolbook Capa setup, that number is 784), so I would not be surprised if there are more reasonable openings than in FIDE Chess.
I retract my statement that there is no value in setups where we randomly advance pawns for both sides one square (if we advance White’s c pawn, we advance Black’s c pawn, for example). In FIDE chess, it increases the number of openings by 256; with Capa arrays, it increases the number of openings by 1024 and computer analysis can tell us if certain pawn advancements make for usable opening setups.
Again, I will finish up my ChessV 0.9.0 analysis of the Schoolbook opening setup over the next few days and should have a final opening list up soon.
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