Srivastava and Schmidhuber have recently written about their first experiences with Power Play. Power Play is a selfmodifying general problem solver that uses algorithmic complexity theory and ideas similar to Levin Search and AIQ/AIXI (see [1], [2], and [3]) to find novel solutions to problems and invent new “interesting” problems. I was more interested in Hutter‘s approximations to AIXI mainly because it was easy to understand the results when it was applied to the simple games (1d-maze, Cheese Maze, Tiger, TicTacToe, Biased Rock-Paper-Scissor, Kuhn Poker, and Partially Observable Pacman), but I look forward to future papers on Power Play.