10 friends get together to play poker. Each brings $10,000 to the poker table. They play for a year. There are winners and losers but it is certain that there is $100,000 in poker chips at the table always. There will be winners and losers but if one or more hold more than $10,000 after a year, it is certain that at least one must hold less than $10,000. This is an example of a zero-sum game. The total money available for the players is constant at $100,000. After one year th