What is pgn4web?
pgn4web is a full-featured and powerful chess viewer that allows you to view PGN games on Chessgames. Unlike the other PGN viewers, pgn4web does not use Java, making it the ideal choice for platforms that are not able to run Java. It is the default viewer for iPhones, iPads, Androids, and other mobile devices.How do I watch a game?
The simplest way to view a game is to press the autplay button (the one that looks like a "+"). That will step you through the game at the rate of 2 seconds per half-move. If you prefer a slower or faster rate, simply press a number--for example, if you press "6" then it will pause 6 seconds for each half-move.How do I flip the board, so Black is on the bottom?
Pressing the f key on your keyboard will flip the board. If you are on a mobile device, pressing the d7 square will do the same thing. There are other shortcut keys which you should know about:For More Information
More information is available at the Official Website.