In this series of videos Prof. Patterson develops a web application version of Reversi (aka Othello) using HTML, CSS, Javascript and jQuery. The infrastructure is managed by Github and Heroku. By watching these videos and following along on a computer, you should be able to build the same application on your own. This is the third in a sub-sequence of tutorials in the series that focuses on building the playing board interaction for connecting players to each other. This video introduces the board update message from the server and then implements the redraw on the client side so that two clients playing the game can see a consistent board. This video is used in courses taught by Prof. Donald J Patterson (@djp3) at UC Irvine and Westmont College.