The Castle of Dr. Brain/Robotics room

Beyond the Logic Hall is the Robotics room. When you enter this room, you will be greeted by three robot heads. Each of them will give you two statements about himself or the other robots. The first is Propeller Head, who alternates between obeying and doing the opposite. The second is Iron Face, who always follows directions. The third is Saucer Head, who always does the opposite of what he is told.

The room itself has four main components: The shelf in the back holds these robot heads as well as different kinds of arms; The robot body in the upper left part where these components fit; The covered maze containing components you will need for later puzzles; and the computer on the right side where the cards that the robots read can be programmed using the programmable magnetic data card.

The goal of this puzzle is to use the computer to program the robots to retrieve objects from within the glass case. To do this, you must choose a head and an arm and place them on the blank robot. Insert the data card into the computer, which will bring up the computer's programming menu that thankfully includes a diagram of the inside of the case. In this screen, use the red arrow keys and buttons to add commands to the list. Depending on the head you have, the robot will either follow the directions exactly, will do the opposite of the given directions, or will alternately follow directions and do the opposite. The arm chosen will dictate which item needs to be grabbed; each arm can only grab a specific item. The magnet arm will grab the iron plaque, the rubber dart gun will grab the plastic clue sheet, and the green fork hand will grab the blue book. The object is to program the robot to pick up each of the items, using "on", and deposit them, using "off", in the semicircle in the top right corner.

On Intermediate and Expert difficulties, after one or more uses of a head, it will break and you will have to use another head. Otherwise, the maze, location of objects, and programming strategy will be the same. The diagram shown in the computing screen is not exactly to scale, so it may take some trial and error to get it right. If the robot is told to do an illegal move, say move into a wall, or the program ends before the object is dropped, the arm will return the object to its spot before retracting so the initial setup will never change.

For each of the objects, the simplest program to retrieve the objects is shown below. These instructions work for Iron Face, who always follows directions, and will need to be modified accordingly for the other two robot heads.

Possible solutions to this puzzle are as follows:

When each of the objects is retrieved, the door to the back will open, revealing the second elevator maze.