The goal of the game is to break the hidden code
in a maximum of ten attempts. The hidden code
consists of four digits. Each attempt may contain
any digit from 0 to 9, no repetition is allowed.
The two columns on the right indicate respectively
the centered digits and the staggered ones.
The digits placed in the correct position in the
hidden code are centered. The digits present in
the hidden code but placed in the wrong position
The code is broken when all the digits become centered.