I couldn't find any design details online for how this was built. I'd love to read more technical details. Since this is purely mechanical, it is probably ext

I couldn't find any design details online for how this was built. I'd love to read more technical details. Since this is purely mechanical, it is probably extremely simple in design. I suspect that there are two relays (representing 2 bits) under each square's reed switch, encoding the number of "left turns" to make upon entering that square. The whiskers probably trigger a simple incrementer for each square to keep track of the number of left turns to make. When the mouse is dropped in a space, it probably turns left to reorient itself, but then knows the direction to walk once it reaches a point in the path where it has solved before because the number of left turns it needs to make in that space is already solved.