I've tried recently to enter colored squares and arrows in the chess.com pgn readers. As it took some time to figure it out, here're some tips; so to be found easily.

Don't try to copy-paste an existing pgn with arrows from a chess.com reader. At least till now the pgn is somehow doubled in the reader to work, and doesn't work again.
The process should be done manually in the editor or in the text editor. At least this is the way how it worked for me.
The code should be written in the comments of the moves in the pgn. If you're doing it manually, meaning between these brackets {...}.

1. After the move, the position of which you want to comment, for colored squares enter this kind of sentence:

[%csl dc4][%c_square c4;square;c4]

with this the c4 square is colored red.

If you do it manually in the text editor don't forget the comment brackets:
{[%csl dc4][%c_square c4;square;c4]}

In the first part of the sentence the color is declared with 'd' just before c4 [=dc4]. The color letters are a, d, l, s. So dc4 is a red c4, ac4 is blue, lc4 is yellow and sc4 is green. Same for arrows.

2. If you want to enter arrows the sentence is of this kind:

[%cal lf6d5][%c_arrow f6d5;from;f6;to;d5]

this is a red arrow from f6 to d5

For both, if you want to color more arrows or squares you should divide with commas, eg.

[%csl dc7,ac6,sd7,le5][%c_square c7;square;c7,c6;square;c6,d7;square;d7,e5;square;e5]

this is a red c7, a blue c6, a green d7 & a yellow e5

same for arrows:

[%cal ad7b6,sc8b7][%c_arrow d7b6;from;d7;to;b6,c8b7;from;c8;to;b7]

this is a blue arrow from d7 to b6 and a green from c8 to b7.

And of course you can combine arrows and squares with word comments, too; all between these brackets {...}.

No matter how it ended to seem, this is what I copied-pasted from my text editor to the chess.com pgn reader below:

[Event "?"]
[Site "?"]
[Date "2021.10.01"]
[Round "?"]
[White "?"]
[Black "?"]
[Result "1/2-1/2"]
[ECO "B12"]
[Opening "Caro-Kann"]
[Variation "2.d4 d5"]
[TimeControl "1/5400:300"]
[PlyCount "4"]

1. e4 {[%csl de5,sd5][%c_square e5;square;e5,d5;square;d5][%cal dd2d4,ac2c4][%c_arrow d2d4;from;d2;to;d4,c2c4;from;c2;to;c4] red e5, green d5, yellow arrow d2-d4, blue c2-c4} c6 {[%cal lc6d5,lc6b5][%c_arrow c6d5;from;c6;to;d5,c6b5;from;c6;to;b5] red arrows from c6 to d5 and b5} 2. d4 {[%csl dd5][%c_square d5;square;d5][%cal dd4e5,dd4c5][%c_arrow
d4e5;from;d4;to;e5,d4c5;from;d4;to;c5] red d5, yellow arrows d2-d4, blue c2-c4} d5 1/2-1/2

Don't know if there's something else better etc. This is how it worked for me....

post club

Super Admins