Installing the pv in the hashtable

[Cardoso]

Hi,
When we install the pv in the hashtable should we care about the score and type of bounds of each entry?
Should the entry type be EXACT?
What about the score? In a negamax formulation should we flip the sign of the score as we flip sides while installing the pv in the hash?

Thanks in advance,
Alvaro

[bob]

Hi,
When we install the pv in the hashtable should we care about the score and type of bounds of each entry?
Should the entry type be EXACT?
What about the score? In a negamax formulation should we flip the sign of the score as we flip sides while installing the pv in the hash?

Thanks in advance,
Alvaro

You certainly have a score and draft, so use those. And yes, you have to invert the score every other ply or the sign will be wrong. EXACT is what you should put in if you want to include the score.