Select a suspect, weapon and room and then click Submit.

Colonel Mustard Candlestick Hall
Miss Scarlett Revolver Lounge
Professor Plum Poison Dining Room
Mrs. Peacock Bust Kitchen
Reverend Green Rope Ballroom
Mrs. White Nail File Conservatory
        Billiard Room
        Library
        Study

Stuck ? If you give up, the link to the solution is here (only to be used as a last resort or if your browser doesn't support Javascript).