At the start of a game of chess, each player has a choice of how many moves?Weegy:
Each player chooses one of 20 first moves available (16 pawn moves; 4 knight moves).
There are 400 different positions possible after each player makes one move apiece.
There are 72,084 positions possible after two moves apiece.
There are 9+ million positions possible after three moves apiece.
There are 288+ billion different possible positions possible after four moves apiece.
There are more 40-move games possible than the number of electrons in our universe.
There are more game-trees of chess than the number of galaxies (100+ billion), and
more openings, defences, gambits, etc. than the number of quarks in our universe!
There are 318,979,564,000 possible ways to play the first four moves of chess.
In addition, America's Foundation for Chess found that there are
169,518,829,100,544,000 x10¹² ways to play the first ten moves of a game of chess.
The Shannon number, 10 to the 120 power (10¹²º), is an estimated lower bound on the game-tree complexity of chess.
As a comparison, the number of atoms in the observable Universe, to which it is often compared, is estimated to be between 4 × 10 to the 79 power and 10 to the 81 power.
http://en.Wikipedia.org/wiki/Shannon_numberAuto Answered|Score 1Weegy:
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