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A Futoshiki is a Japanese logic puzzle with a square board in which, similar to Sudoku, numbers must be sorted according to certain rules. Do you want to know how it works? Here is a step-by-step explanation. 00:00 Intro 00:29 What is a Futoshiki? 01:48 Tricks 02:42 4x4 Futoshiki 05:26 5x5 Futoshiki