I finally won against sigma chess!
Finally! I was reading Loomis's blog post about greek gifts (http://blog.chess.com/Loomis/two-more-greek-gifts) and liked the idea of putting the knight on g5 and then planting my queen on h7 for the win. This idea lead me to my first win against Sigma Chess, which has been the bane of my newbie chess existence for quite sometime now.