Popup Chess is a free Chrome add-on developed by Maxim Collingwood. This handy tool provides users with a drag-and-drop chessboard conveniently located in a popup window. With Popup Chess, you can easily explore different chess openings, practice puzzles, play against a friend locally, and study endgames.

The instructions for using Popup Chess are straightforward. To move a piece, simply drag and drop it to the desired location on the board. If you need to remove a piece, drag it outside the board and drop it. To reset the board, you can close and reopen the extension.

Whether you're a chess enthusiast looking to improve your skills or simply enjoy a quick game of chess during your browsing sessions, Popup Chess offers a convenient and accessible solution. Give it a try and enhance your chess experience on Chrome.