How do I embed chess games from PGN files in markdown format?
Well, on this site, you can use the 'replayer'. Basically, you just paste the PGN as a code block; for more details, see Can we implement a replayer for chess analysis on the site?.
For example, the following code will display the first three moves of the Ruy Lopez opening:
[FEN ""] 1. e4 e5 2. Nf3 Nc6 3. Bb5
(it doesn't work right here because of the <pre> block in the post source)
Sometimes when I found interesting articles, I copy it to my notepad2-mod, that allows me some simple syntax highlighting, and that has moved me to adopt the following practices with chess articles with games interspersed.
1) For every pair of moves, supress the dot.
2) To avoid markdown processor interpreting incorrectly the pgn header, place the game between '~~~', before and after the game. This way, the block is treated as a block.
3) Add the text as you please, following the markdown conventions.
For the time being, it is not possible to assign a chess font to the move section, due to the document model followed by markdown. A document, does not change fonts on every paragraph; instead asign fonts to specific parts of the document, like title, tables and text.