Fig. 2: Classical and quantum strategies for the magic square game. | Nature Communications

Fig. 2: Classical and quantum strategies for the magic square game.

From: Playing games with multiple access channels

Fig. 2: Classical and quantum strategies for the magic square game.

a An optimal classical strategy for the magic square game that allows Alice and Bob to win the game for 8 of the 9 possible questions. Filling the bottom right square consistently with the parity constraints for the rows (even) and columns (odd) is impossible. b A perfect quantum strategy defined by measuring the observables in the cells on two maximally entangled states. Note that the observables along each row and column commute pairwise.

Back to article page