Latest Posts(2) See All Blue Prince: How To Solve The Parlor Game (Three Boxes Puzzle) Blue box: There are two true boxes.White box: There are two empty boxes.Black box: This box is empty.C: Black box Post by SuperSahama 0Upvoted 0Replies View Blue Prince: How To Solve The Parlor Game (Three Boxes Puzzle) Blue Box: This box contains the gems.White box: This box does not contain the gems.Black Box: The other two boxes are true.C: Black box Post by SuperSahama 4Upvoted 2Replies View