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Subject: What makes Fruit so strong?

Author: Steve Maughan

Date: 11:49:28 03/12/04

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Amazing!

I'm amazed at Fruit's score.  I've downloaded it and it seems like a robust
engine but I note that it's quite slow and according to the author has little
knowedge above and beyond piece tables.  Monarch is my engine.  It's nowhere
near as strong as Fruit - I'd estimate Fruit is +200 ELO stronger than Monarch.
Like Fruit, Monarch also has just piece tables and I believe that Monarch is
probably even a little faster than Fruit.  Like Fruit Monarch also has Null
move, check extensions and hash table (2 probes) i.e. on paper they seem to be
close in spec.  So the question is what makes Fruit so strong?

a) Fewer bugs - quite possible!
b) ETC - Monarch doesn't have this - Fruit does
c) No PV cut-off's in Fruit
d) Better piece square tables
e) Combination of b, c & d
f) ?

Of course another explanation is that Fruit is much more sophisticated than the
author claims but I see no reason to think this.

Any thoughts?

Steve



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