This talk explains how to build web-based board games without JavaScript but only with Ruby. Web programmers are forced to write front-end code using JavaScript. And interaction with the client-side and server-side grows increasingly complex. Board game which has rich UI and communicate in real-time is one of the applications which needs such requirements. Opal is a compiler converts from Ruby to JavaScript. I created some gems for Opal as follow as. Virtual DOM Isomorphic web programming framework dRuby implementation on browser I show you a web- board game demonstration using these gems.