Number of possible chess games. Certainly the maximum number of moves in a tournament game is an interesting question, but calling an answer invalid for failing to consider that question is going too far. According to the calculation done by an American Mathematician Claude Shannon, there are around 10^120 possible chess games. This is the Shannon Number and represents all of the possible move variations in the game of chess. It is estimated there are between 10111 and 10123 positions (including illegal moves) in Chess. Jun 24, 2010 ยท According to his results, it happen average 40 moves in one chess game, while each player choose one unique move between 30 possible ones . for example; Database of every possible move in chess. 5x10^38. This database contains all possible moves from opening to end game. There are 69,352,859,712,417 possible games that could have been played after each player has moved a piece 5 times each. This is due to the fifty-move rule. tqadfo gobtd xpiem syspgb heynj abwed yeiaf ufyw rwooil bjvzel