Abundance of castling vs en passant rights

[Kirill Kryukov]

Just in case if you were curious: In chess endgames castling is more abundant with up to 8 pieces, en passant - with 9 pieces or more.

Details are available on the NULP pages (link to relevant results section).

(BTW, this has nothing to do with the frequency of observing castling nor en passant in actual games).

[Astatos]

Thanks mate, this is some cool stuff! Keep them coming.

[Kirill Kryukov]

Thanks mate, this is some cool stuff! Keep them coming.

Welcome, and thanks!