Author: Uri Blass
Date: 11:12:58 12/29/05
Go up one level in this thread
On December 29, 2005 at 13:52:49, Stuart Cracraft wrote: >On December 29, 2005 at 05:58:50, Uri Blass wrote: > >>On December 29, 2005 at 05:56:33, Uri Blass wrote: >> >>>On December 29, 2005 at 05:02:36, Tord Romstad wrote: >>> >>>>On December 29, 2005 at 04:49:09, Gian-Carlo Pascutto wrote: >>>> >>>>>On December 28, 2005 at 16:04:28, Tord Romstad wrote: >>>>> >>>>>>Perhaps you can even omit some >>>>>>piece types. I don't evaluate pawn or king mobility at all (in my >>>>>>experience, there are better ways to evaluate king activity), and I >>>>>>have never seen any measurable difference in strength when I >>>>>>switch queen mobility on or off. >>>>> >>>>>What about knights? >>>> >>>>Good question. I have never tried disabling knight mobility, but >>>>it is perfectly possible that a piece square table with high values >>>>for central squares would work just as well as pseudo-legal >>>>mobility for knights. >>>> >>>>Tord >>> >>>My mobility for the knight is legal mobility. >>>Knight that is pinned get no bonus. >>> >>>Uri >> >>When I think more about it I will need to give it negative score when I change >>my mobility evaluation because today I give every side bonus based on the number >>of all moves and I plan to change it to bonus based on the number of all moves >>relative to material(similiar to fruit) >> >>Uri > >By "all moves relative to material" what do you mean? > >Stuart I will give example for mobility of rooks in fruit in the opening. In fruit the formula of opening mobility for rooks is 0.02*(R-7) when R is the number of moves of the rook. It means that if you have one rook and it has 8 moves you get bonus of +0.02 pawns but if you have 2 rooks that every one of them has 4 moves you get bonus of 0.02*(4-7) for every rook or in other word panelty of 0.12 pawns You can see that the same number of moves for rooks(8 moves) can give bonus or panelty depending on the question if the side has one rook or 2 rooks. Uri
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