The complete move list must appear in the text of the article, since not everyone will be able to view the animation.Only users who explicitly choose to install the Gadget will be able to view the animation.This will be a Gadget, not a change to MediaWiki:Common.js. (The current options are to include an animated GIF, a static image, or a movie, but nothing in Wikipedia right now allows the user to control the chess game interactively.) This is already working on the Hebrew Wikipedia but needs consensus to be brought over to English Wikipedia. The proposal is to use a Javascript viewer so the user can view the chess game one move at a time, moving forwards and backwards by pressing buttons. PGN is a standard format to record chess games. In any case, it is important that the full list of moves be spelled out explicitly in the article text. If the gadget is disabled something simple will be shown instead, likely a static image or animated GIF of the board. If the gadget is enabled the user will be able to step through the chess game move by move. We are going to adapt קיפודנחש (aka kipod)'s PGN Chess Viewer into a WP:Gadget.

Pgn chess viewer