I've been trying to implement a nice diagram and have no idea how.
Based on Is it possible to make little changes to the FEN diagram I tried
[FEN ""] 1k1r3r/pPbn4/4p3/8/3Pp1B1/2q3pP/2P1Q1P1/R3K2R w KQ -
Which doesn't work. I looked at the Help and there are no instructions. To attract new users I think you all should strongly consider either adding it to the FAQ, Help, or possibly an extra button on the WYSIWIG Editor so people like me can figure out how to post games.