Your name is John H. Watson. After getting marriage with Miss Morstan you moved out from your friend, Sherlock Holmes. For many days you have no massage from him, but yesterday you got a letter in which he asks you for help in solving another murder mystery. Before you go forth to the next adventure, Sherlock wants to make sure that you didn’t get out of practice. This is why he has prepared for you in the apartment at Baker Street 221b a few puzzles that you have to solve, in order to convince Holmes that he could still count on you. Hurry up, you have to finish in only one hour!