Author: Uri Blass
Date: 23:28:32 04/05/04
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On April 05, 2004 at 17:09:29, Dieter Buerssner wrote: >On April 05, 2004 at 10:51:06, Tim Foden wrote: > >>I've used multi-variate linear regression to generate a set of evaluation >>values, but I have some bugs in the implementation (as pointed out by Dave >>Gomboc when I spoke to him in Graz), and I haven't tested the values at all. I >>still plan to pursue this some more when I have the time and the inclination. > >How are you doing the fitting technically. As I understand it, the values are >not linear independent. For example, you would get the same result, if you gave >knight material 0.5 less, and all knight mobility values 0.5 more. >If I recall, how this was done, in one step there is an inversion (half way) of >a matrix. >Using the Gauss Jordan method, this will leave you with a zero pivot element. >Or are you using some more sophisticated methods like SVD decomposition? > >> "knight material value" 3.567 3.1712 3.1393 3.0996 >> "bishop material value" 4.1172 3.533 3.3734 3.2835 > >> "queen material value" 7.1422 9.5802 9.4663 9.1281 > ^^^^^^ > >Can this be correct? Q less than N+B in he opening. > >Regards, >Dieter I guess that it is dependent on more positional scores. I can imagine that it is possible that practically the queen get a big positional bonus in the opening thanks to other factors. Uri
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