Most beginners looking for grading help have circulated coins, and fortunately circulated coins are the easiest for the novice to grade. It helps to have a Mint State specimen of the coin type under consideration to make comparisons to, but this isn't a requirement.
1 Player 2 Players 3D Action Adventure Advert Games Animal Army Ball Basketball Billiards Blood Bomberman Buy Equipment Upgrades Car Cat Dress Up Fighting Food Football Fun Funny Girl Guns Mario Matching Motorcycle Puzzle Racing Shooting Skateboard Soccer Stick War Zombies.
What is a two person constant sum game? I read that a two-person constant-sum game is a two-player game in which, for any choice of both players strategies, the row player's reward and the column player's reward add up to a constant value c. However I am not sure how to use this definition to determine whether a game is constant-sum.