Logic Puzzle Solver
To solve a puzzle like this you need the following diagram. Fill in a "+"
if you know that something is for sure and a "-" if you know for sure something
is not true.
For example: The Englishman lives in the red house. So at the cross English-Red
write a "+". And on the crosses English-Green,-White,-Yellow,-Blue you write
a "-". Because you know that the Englishman doesn't live in one of the other houses.