100 Futoshiki Puzzles is an interesting collection of 100 Futoshiki passtimes, of differeing sizes and difficulties: from the most basic 4x4 to the biggest 9x9. All the Futoshiki puzzles are presented in PDF format, are completely free and can be freely distributed.The objective of Futoshiki passtimes is to place the numbers 1 to 5 in each row and column. Some numbers are already inserted at the start, and also some constants are specified in some table cells.