I am not sure if the app is using the right dictionary or if it is broken in Chrome. I used the string "AARGHQQQQQQQQQQQQQQQQQQQQ" to run a search and it returned no results. "aargh" is in the Letterpress dictionary.

I wrote a quick Python script last week that took the board position and returned the unplayed word with the highest point values (with a winning move being worth the max value). I thought about expanding it to look ahead, but it wasn't needed to beat human opponents.

The coup de grace would be to bundle it all up as an app that pulled from the camera roll and spat out a move.