As the layout of the coffin lids is random at the start there is no set solution to the problem but try and get the lids into a symmetrical layout as this makes it easier to close them all. The idea of this puzzle is to turn the cards over, you can only turn over cards that lie adjacent to each other either vertically or horizontally or that are separated by a space. One point to note is that a card already face up can be classed as a space. There are two layouts of cards and the solutions to the two layouts are below. The knight puzzle is similar to the bishop puzzle in that the white knights must replace the black knights and vice versa.
Knights can only move in an 'L' shape of two squares by one.
One way of getting the knights across the board is by moving the knights on the following squares in sequence. The squares are lettered from left to right and numbered from top to bottom. The idea of this puzzle is to turn the coins over, you can only turn over coins that lie adjacent to each other either vertically or horizontally or that are separated by a space. One point to note is that a coin already face up can be classed as a space. There are two layouts of coins and the solutions to the two layouts are below.