Normal sudoku rules apply. Every 5 in the grid must have a 1 directly above it or a 9 directly below it. It may have both, but it doesn't need both. A camel’s move in fairy chess is a jump of three squares horizontally and one square vertically or three squares vertically and one square horizontally. Any cell a camel’s move away from a camel cell has to contain a digit that is either consecutive or in a 2:1 ratio with the digit in the camel cell. There are exactly seven camel cells in the grid. Two of them are shown; the others are hidden. All the hidden camels are in odd-numbered boxes and contain the digit of the box that they live in. The 3x3 boxes are numbered in normal reading order.