Long castle notation -> Lichess lowercases the text

Enter the notation symbol for long castle – "O-O-O" – into a chat window in an analysis board, and Lichess will accidentally lowercase all the text, because it thinks you shout.

Notice, "O-O-O", not "0-0-0". The first is the symbol for long castling, the second is the symbol for a perfect game, according to Lichess Stockfish Analysis.

You need to enter it twice, in two different chat texts. Example (open it):

"the second is the symbol for a perfect game, according to Lichess Stockfish Analysis"

Actually, more like according to those gullible enough to believe that it's "perfect." ;)

OwO

We can put O-O but not O-O-O in tournament chat

Both are triple zeros. Sometimes three losses in a row in a tournament are called „long castling“...

The great thing about standards is that there are so many to choose from...

> The main differences from standard Algebraic are that there is both a dot and a space after each move number, and an upper case "O" is used instead of a zero in the notation for castling.
Burgess, Graham (2000) [1997], The Mammoth Book of Chess, Carroll & Graph, p. 517, ISBN 0-7867-0725-9

> 8.2.3.3: Basic SAN move construction
> ... SAN kingside castling is indicated by the sequence "O-O"; queenside castling is indicated by the sequence "O-O-O". Note that the upper case letter "O" is used, not the digit zero. The use of a zero character is not only incompatible with traditional text practices, but it can also confuse parsing algorithms which also have to understand about move numbers and game termination markers. Also note that the use of the letter "O" is consistent with the practice of having all chess move symbols start with a letter; also, it follows the convention that all non-pwn move symbols start with an upper case letter.
opensource.apple.com/source/Chess/Chess-103.0.3/Documentation/PGN-Standard.txt.auto.html

> Castling is represented by the King move, like e1g1, except in Chess960, where O-O and O-O-O are used (oh, not zero!).
http://hgm.nubati.net/newspecs.html

> A.20 For castling, the king's starting position and ending position are recorded: for white, 5131 (queen-side) and 5171 (king-side); for black, 5838 (queen-side) and 5878 (king-side).
webfiles.iccf.com/rules/2021/THE%20ICCF%20LAWS%20OF%20CORRESPONDENCE%20CHESS%20-%20updated%201-28-21.pdf

Yes, per PGN Standard it is the big letter "O". I just tested with Scid and ChessBase, both accept "0-0-0" or "O-O-O" as input. Both output "O-O-O".

Here is a specific link: http://www.saremba.de/chessgml/standards/pgn/pgn-complete.htm#AEN237

Edit: Ups, @Toadofsky quoted it already.