Longest individual notation?

so maybe e7xQd8=R#?

or Pe7xQd8=R#?

or maybe (if you could capture during castling) then maybe a double disambiguated capture long castle unaccepted draw check/mate? (while also capturing a double disambiguated queen)

so a1RO-O-Oxc1Q=#?

Are you having some trouble with notating in chess?

Bc8xe6#

I think bxa8=Q# is the longest possible notation.

Qg2xd5# and things in that format is probably longest. I can't think of anything longer because the only extension to notations are +, # and x and x and (# or +) can come together plus one piece then a square than x than the square it moves to then + or #.

I thought f7xRg8=Q# would be the longest, since that is 9 characters without any ? or ! but I could be completely wrong

It might be e5xd6ep#. The move e5 indicates that the pawn started at e5. The notation xd6 shows that the pawn captured an opponent’s piece and landed on d6. The "ep" signifies that the pawn took the opponent's piece en passant. Also, the hashtag indicates Checkmate. And the Notation has 8 Characters.

ep is not mandatory and dosent show up on chess.com if you try exd6# (there is no 5 because no two pawns on the same file can move to the same square) and # is possible. Here is my best demonstration.

it just shows the information symbol (ℹ️)