How to use the Chess.com Diagram Editor - Chess.com
What is the maximum number of pieces that can be on a chessboard in a reachable position such that neither player can achieve checkmate (not even a helpmate)? - Quora
I made a mobile app to scan chess diagrams from prints and digital sources. More in the comments : r/chess
Animated Chess Diagram | Apronus.com
Science on the Squares: My Excel "FEN to Diagram" Tool