I dimly remember a movie that had a Jewish (?) WWII prisioner (in Germany, most likely) that used bread to build chess pieces. At one point he played his guard / interogator (German, most likely), and surprised him with a special move that had the guard / interogator completely baffled.
That's about all I remember, aside from the conditions of that game being highly emotional (the prisioner facing execution, deportation or somesuch?).
The chess move might have been called "Grünfeld Gambit" or something like that, but I might mis-remember that.
I watched that movie on TV a long time ago (try 20+ years), and the memory has a feel to it as if it was already old at that time. Probably a German production, somewhere between the 50's and the 70's perhaps. (Black & white? Possibly. Likely, even.)
The movie worked on the premise that the audience knew about the holocaust, and pictured the prisioner as quite likeable, which rules out any wartime / late 1940's production.
Can you identify that movie?