some EGTB's do not have nbb and nbw files?

Endgame analysis using tablebases, EGTB generation, exchange, sharing, discussions, etc..
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Darrell
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some EGTB's do not have nbb and nbw files?

Post by Darrell »

Hi all

Just joined today and I hope to be able to contribute in some way.

I have 89Gb of six man bases on my pc and am looking to increase that fiqure however, I will start with a quick question which is probably straight forward answer for you guys.

Why some bases do not have a nbw and a nbb file? I have noticed that these seem to be when black and white have same pieces ie kpp v kpp. Is it that somehow the tablebase is mirrored? and therefore is correct to have only one file sometimes.

Regards
Darrell
guyhaw
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Symmetric endgames ==> no .nbb files

Post by guyhaw »

Where the endgame is symmetric, there is no need for the usual btm .nbb files. Only .nbw files need be consulted. g
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