"Thorp had decided to take the reins himself once again.  He'd developed a strategy that looked promising. (What was it? Thorp wasn't talking.) In early 2008, he started running about $36 million with the strategy.  By the end of 2008, the strategy - which he called System X to outsiders - had gained 18 percent, with no leverage. 

...Ed Thorp was back in the game."

System X