The principle of zero-sum game is as follows:

When two people play chess, one will win and the other will lose. If the winner is calculated as 1 minute, the loser is-1 minute. Then if A wins N times, B must lose N times. If the number of times A fails is m, then the number of times B wins must be m ... In this way, the total score of A is (N-M) and the total score of B is (M-N). Obviously, (N-M)+(M-N)=0, which is the mathematical expression of zero-sum game.

Zero-sum game, also known as zero-sum game, is a concept of game theory and a non-cooperative game, as opposed to non-zero-sum game. Refers to all parties involved in the game. Under the strict competition, the gains of one party will inevitably mean the losses of the other party. The sum of the gains and losses of all parties in the game is always "zero", and there is no possibility of cooperation between the two sides.