Author: Rupesh
Date: 19:14:17 04/21/03
Dear All, I am puzzled about two parameters in deep fritz 7. The futility pruning and selectivity. Are not they one and the same thing? What impact does it have if i increase the selectivity from default(2) to say 6 (which is maximum). What happens if i turn off futility pruning. I have noticed that deep fritz misses many tactical shots esp in blitz (3 + 2) in complex positions. If i turn off futility pruning and put selectivity to 0, it picks up correct moves even in blitz. Surprisingly it does not seem to affect the engine performance as is often warned ( that with selectivity 0, you will have lots of junk sort of stuff). Also does changing futility pruning and selectivity have implications for hash size and contempt value/ draw score. Will be indeed be grateful if somebody can explain the nuances involved here. Chessbase seems to have an official policy of not disclosing the siginficance of these parameters. Regards and Thanks Amitesh
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