About Greater Grid
Greater Grid is a number logic puzzle known in Japan as Futoshiki, which means not equal. Like sudoku, every row and every column holds each number exactly once. But instead of lots of starting numbers, the clues are less-than and greater-than signs between neighbouring squares.
The open side of a sign always faces the bigger number, across and up and down. Those little signs are surprisingly powerful: a square that is smaller than its neighbour can never be the biggest number, and a chain of signs can pin a whole row in place. There are 60 puzzles from 4 by 4 up to 7 by 7, every one with exactly one answer.
It is great practice for comparing numbers and logical thinking. Repeated numbers and broken signs turn red, pencil notes keep track of possibilities, and hints help when you are stuck. Solving without hints wins 3 stars. A robot checked every sign and every answer.
Best for ages 8+
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