Katrielle and the Millionaires' Conspiracy walkthrough
Puzzle Location: Grand entrance hall (The picture in the left)
Here we have nine people, some 'good guys' and some 'bad guys'.
If the good guys have a bad guy next to them, they will point at them, otherwise they will fold their arms.
Whereas the bad buys always point at someone, whether that person is good or bad.
Touch a person to mark him as a bad guy.
Touch again to remove the mark.
Place markers on the two bad guys hiding in the group.
Knowing that there are two bad guys, you can be sure that in a group of three or more who are all pointing at the same person, at least one of the group must be a good buy.
Continuing on from hint one...
There are five people all pointing at the centre guy.
Even if both bad guys were among those five, it would still leave three people pointing at the centre.
So the person in the centre must be a bad guy.
Continuing on from hint two...
There's one bad guy left to find.
It's one of the two remaining people being pointing at by two others: either the top-centre, or top-right person.
Consider each in turn and determine which doesn't fit with the stipulated conditions of the puzzle.
Continuing on from hint three...
If the top-right person were the remaining bad guy, it would mean that anyone pointing at the top-centre person is a pointing at a good guy, which results in two more bad guys.
Since that doesn't satisfy the conditions of the puzzle, it can't be right.
The answer is as follows.
top-center and central.