Alot like the mastermind with the hats in a mini edition.
four guys are convicted to lifetime prison for stealing candy from the Queen of England (yea i know, but i didn't make it up
)
The four guys are all given a hat of either white or black(two blacks, two white) they don't know the color of their own hat. if one of them can guess the color of their own hat all of them will go free.
i'll make i little drawing here with numbers xD
1 2 3 4
guy 1 can see 2 and 3
guy 2 can see 3
guy 3 and 4 can see no one
they can't talk or communicate in anyway.
who guesses it ?
the answer isn't something dumb.