countermove heuristic

[flok]

Hi,

I'm looking at the countermove heuristic (http://chessprogramming.wikispaces.com/ ... +Heuristic).

A question: this table, for what period is it valid? only while searching the current move? or maybe only for the pv it is in?
To say it differently: when must it be cleared?

[cdani]

I have several types of countermove lists and refutation lists, and I clear them on ucinewgame or at the start of the search, but the ones I clear at the start of the search probably is not worth it.

[D Sceviour]

Hi,

I'm looking at the countermove heuristic (http://chessprogramming.wikispaces.com/ ... +Heuristic).

A question: this table, for what period is it valid? only while searching the current move? or maybe only for the pv it is in?
To say it differently: when must it be cleared?

One thing I found with the 6x64 array is that it too small for today’s depths. The array quickly becomes saturated and worthless. Maybe it should be cleared frequently.