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Subject: Question about mobility from attack boards

Author: Ryan B.

Date: 08:41:25 05/06/05


Using the idea of having a White attack board and Black attack board (WB and BB)
from http://members.home.nl/matador/chess840.htm I assume mobility is taken by
simply counting the squares each piece you are counting mobility for attacks.
Once you have the date in WB and BB this seems very fast and simple to implement
however I see a huge problem with bishops using this method I have not been able
to find a cost effective answer for yet.  If you have 2 bishops you will need to
know how mobile each bishop is to determine individually if the bishop is weak
or strong. (I need to color square of the strong bishop for other parts of the
eval.) Simply counting the squares attacked by bishops does nothing to tell you
what color the squares are that are being attacked.  Does anyone have a cost
effective way of implementing strong/weak bishops using this method of mobility
or have I simply misunderstood how mobility should be done with this data?
Thanks,
Ryan



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