OK, I ran this one for my group once. It's essentially a dungeon level, and the goal is to manipulate levers that open and close secret doors until you can find your way to the stairs down. Each lever is connected to 3 of the secret doors. When you move the lever, the doors open if they are closed, and close if they are open. A switch could open 2 doors and close the third, etc..., depending on what their current configuration is. There is a switch in the middle of the puzzle that resets it, closing all the doors so you can start over.
The secret doors are lettered A, B, C, E, F, G, H (I forgot D)
The switches are numbered 1, 2, 3, 4
These are the doors that open/close when you hit the switches:
Switch 1: Doors B, E, G
Switch 2: Doors A, E, F
Switch 3: Doors A, H, F
Switch 4: Doors C, E, G
So what order do you need to hit the switches in order to get to the southern room? Keep in mind that some switches are in rooms that can get closed off by secret doors, so a switch you hit previously might not be currently available.
Here is the map: