  Three different quantum cards which are non-orthogonal quantum bits are sent
to two different players, Alice and Bob, randomly. Alice receives one of the
three cards, and Bob receives the remaining two cards. We find that Bob could
know better than Alice does on guessing Alice's card, no matter what Bob
chooses to measure his two cards collectively or separately. We also find that
Bob's best strategy for guessing Alice's card is to measure his two cards
collectively.
