Numerichains are puzzles of logical and numerical deduction. The goal is to
determinine the location of every number in a grid of squares. The numbers
form a chain. 1 will be next to 2, 2 will be next to 3, and
so on (diagonals dont count).
In the example at right there are ten rows and ten columns, so the chain uses the numbers 1 through 100. In the puzzle you are not shown the numbers in each box; thats what you are trying to figure out. Instead, you are shown the blue areas and are told which numbers are in them. The tricky part is that you arent told the order of those numbers. For example, youre told that the blue area near the left of the middle row contains 43, 93, 98, and 99, but its up to you to figure out which goes where.
You can get more information by making additional queries (more blue areas). But the goal is to solve the puzzle with as few queries as you can. Believe it or not, the eight queries in the puzzle shown are enough to solve it. No other number chain can fit the information given.