How to fix wrong information in CPW?

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Nevsor
Posts: 3
Joined: Sun Aug 15, 2021 8:35 pm
Full name: Sven Stegemann

How to fix wrong information in CPW?

Post by Nevsor »

I found an error in the Chess Programming Wiki. I did not however manage to find a recommended way to contact the editors of CPW to fix it.

The error is in https://www.chessprogramming.org/BMI2:
Ronald de Man's generator for Syzygy Bases can take profit of PDEP and PEXT instructions, or to use their serial implementations to further reduce the size of his already compact endgame tablebases [19].

In the linked thread Ronald de Man however clearly states, that his tablebases only use PEXT in the move generator to reduce the size of the attack tables, not the size of the generated tables.
tmokonen
Posts: 1296
Joined: Sun Mar 12, 2006 6:46 pm
Location: Kelowna
Full name: Tony Mokonen

Re: How to fix wrong information in CPW?

Post by tmokonen »

Nevsor wrote: Sat Aug 21, 2021 4:02 pm I found an error in the Chess Programming Wiki. I did not however manage to find a recommended way to contact the editors of CPW to fix it.

The error is in https://www.chessprogramming.org/BMI2:
Ronald de Man's generator for Syzygy Bases can take profit of PDEP and PEXT instructions, or to use their serial implementations to further reduce the size of his already compact endgame tablebases [19].

In the linked thread Ronald de Man however clearly states, that his tablebases only use PEXT in the move generator to reduce the size of the attack tables, not the size of the generated tables.
Maybe send a PM to Gerd Isenberg or phhnguyen. Both of them post fairly frequently here.