Author: David Rasmussen
Date: 12:59:18 01/17/03
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On January 17, 2003 at 14:07:59, Anthony Cozzie wrote: >Last night Zappa played a most annoying game vs sfarrellc: > > >1) is there just a bug here? >2) if you get a mate score from the hash table, what do you do? > >anthony Of course you have to adjust for ply depth when you store, and when you retrieve. If you're like most of us, when encountering a mate during search, you will return mate - ply, that is, how many plys _from the root_ the mate is. When storing it, you should adjust the score so it's _mate_from_here_. And then when retrieveing it, you should convert it back to a _mate from the root_. So if you encounter a mate in 3 at ply 7, that is a mate in 10 from the root. You store this as a mate in 3 from the current positon at ply 7. Then later when you retrieve it at ply 11, you will have mate in 3 from here, and that is mate in 14 from the root etc. /David
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