Nice quiz

[Mercury]

There is one prisoner in a prison. This man is sentenced  to death by electrocution. But one day, he got a very big favor. The prison manager took this guy and told him:

"This is your only chance to live. Here is a chamber with 2 doors and 2 guards. One door leads directly to electric chair and the other directly to freedom. One guard speaks ONLY truth and the other tell ONLY lies. You do not know which door leads where. In each door stands a guard. You do not know who is who, who tells the truth and who tells lies. You have ONE AND ONLY ONE question to make to ONE ONLY guard. From his answer you must understand which door leads to freedom and pass it. Speak the question"

What is the question?
Remember that he does not know which guard is in front of which door and he only have one question to make to one only guard. 

It is not very easy... 

[Andre]

"where would you go to save your self" ?
 

[Mercury]

if he ask the lier, he would show him the electric chair ... 

[kam]

Does the guards know which door they guard?

[methos]

Of course they must know.
If they do not, how will they give a clear answer?

[Andre]

He would ask
"Which door would the lier send me for freedom?"
 

[SiEger]

Come on say the answer...

[kam]

He would ask
"Which door would the lier send me for freedom?"
 

This answer suits me fine...

[Erkeli]

where is this mercury guy to answer?

[Mercury]

He would ask
"Which door would the lier send me for freedom?"
 

Andre this is great. I know one answer that goes like:

"If you where the other guard, which door would you suggest me for freedom?"

But your answer leads also to freedom.

You impress me! I think this is also a correct answer! And i thought only the one that i know was correct