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Subject: Questions to Dr. Ernst A. Heinz about move ordering

Author: Pham Minh Tri

Date: 17:01:31 10/24/00


Hi,

In the book "Scalable Search in Computer Chess" you listed the move-ordering
scheme as following:
1. hashed move
2. good capture moves
3. killer moves
4. history moves,
5. statically pre-sorted remaining moves
6. bad capture moves.

My question are:
1. How about pv move? Do you install them into hash table? If yes, what is
benefit (I think if we keep separating pv and hashed moves, we will have more
good moves for searching first).
2. How do you divide good and bad capture moves? Are the bad capture moves
really "bad" therefore you listed them in the end (I mean they would be higher
order)?
3. Could you explain more details about statically pre-sorted remaining moves?
Thank you in advance,
Pham



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