About

The Mind Lock is a 3-dimensional sliding piece puzzle. It is closely related to such puzzles as Peter's Black Hole and the Varikon Box. This puzzle is essentially a 2×2×3 sliding cube puzzle which has been flattened along the third axis. It has a flat square frame with four square windows on both sides. Inside these windows are 11 tiles in three 2×2 layers with one gap. Tiles can move around by sliding into that gap. The main difference between this puzzle and the others is that it is not possible to slide tiles in the middle layer directly. You can only push them through to the front or back layers. If your browser supports it, you can click on the link below to play with a Javascript version of Mind Lock.