Put a bookmark in your bookmark toolbar with the address below (copy and paste it).
Then if you are viewing a game that has a URL ending in &nmove=...,
clicking the bookmark will advance to the next move.

<P>
<P>
<b>
javascript: (function(){var s = window.location + ""; var i = s.search("&amp;nmove=") + 7; 
var 
mn = parseInt(s.substring(i)) + 1; window.location = s.substring(0, i) + mn;})()
</b>