PSQT for move ordering ?

[MahmoudUthman]

*Where can I find them ? & why isn't it used more , is it not worth it ?

[elpapa]

Where can I find them

Well, you have to write the code. It's not something you find in a box in the garage.

Do you mean what values to use? I use the same tables as in the evaluation function.

psq[piecetype][to_sq] - psq[piecetype][from_sq]

That's it. I use it only for moves with no history score. Probably doesn't add much strength, if any.

[MahmoudUthman]

Where can I find them

Well, you have to write the code. It's not something you find in a box in the garage.

Do you mean what values to use? I use the same tables as in the evaluation function.

psq[piecetype][to_sq] - psq[piecetype][from_sq]

That's it. I use it only for moves with no history score. Probably doesn't add much strength, if any.

I meant values , & I thought they were supposed to be different :
http://www.top-5000.nl/authors/rebel/ch ... 20ORDERING

[elpapa]

I don't know why they should be different. That example with the knight is pretty close to typical values for a normal psqt, I think.

[jdart]

Most of the move ordering methods I have tried (except history, which is standard) have been ELO losers, but your mileage may vary.

--Jon