This puzzle is part of the Monthly Topic Challenge #7: Board games.
On a cold December night in 1992, several guests have arrived at a mansion in Beverly, Massachusetts.
An hour later, the body of the host is found in the cellar.
You have been asked to solve the crime.
All you have is a map of the mansion showing some rooms and halls of white and orange tile. Unfortunately, it is inaccurate! Exactly 8 white tiles should be orange instead.
Who murdered the host? Where? And with what?