Michael is spot on with everything. He is the first author in the market that mention about this topic. These two words summarizes everything, SKILL+ LUCK. There is is typical saying that runs like this: The skillful player have plenty of luck. This is identical to what Michael said in his book. MORE SKILL means MORE LUCK. I am an avid sportsman myself and through my years of experience, in playing golf and tennis,and chess, this is 100% applicable. There is always something unpredictable which can be attributed to luck. Very good book Michael, this should be an eye opener to all sportsperson and business people who wants to be successful in their endeavor. I am writing a book about predictor of success, and I will include your theory (success equation) as one of the predictor of success.