Subtraction game
= Subtraction game
A subtraction game has a heap of <nonnegative integer> size. A legal move subtracts an allowed positive amount without making the size negative; normal play declares an empty move set losing.
= Subtraction game
A subtraction game has a heap of <nonnegative integer> size. A legal move subtracts an allowed positive amount without making the size negative; normal play declares an empty move set losing.