How about another cool riddle?

Three opponents, Aand C, have agreed to a truel with pistols. You are A, and you are a poor shooter: you are only able to hit your target once out of every three tries. is better, he can hit the target two out of every three tries. never misses.

In the interest of fairness, you are allowed to shoot first, firing one shot, then (if still alive) fires one shot, then (if still alive) fires one shot, and the turns continue until only one remains alive.

Clearly you have made a bad decision agreeing to this contest. Now the question is, where should you fire your first shot in order to maximize your chances for survival?

Simon Singh: “Fermats Enigma – 
The Epic Quest to Solve the World’s Greatest Mathematical Problem”, Anchor Books USA, 1998.

Hint: Click here to find out what you shouldn’t do.

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