Nice fitness and energy for the brain.Futoshiki. This is a logical puzzle with numbers. The game field is a square grid; some cells may have numbers; between the cells may be present characters ,"" which show the relationship established between adjacent numbers. It is necessary to fill the free cells with numbers so that in each row and in each column each digit would meet only once. Futishiki logic puzzles with the names: "Hutoshiki," "Unequal." Hitori. This is a logical puzzle. Cross out repeating numbers so that none of them appear in one row or column more often than once. The crossed out cells can touch each other only with angles, but not sides. Unsolved cells should constitute a continuous "white" space, that is, none of them should be isolated from the others.200 Futoshiki sudoku puzzles 9x9 easy levels.200 Hitori logic puzzles 10x10.- unique puzzles+ 250 sudokus difficult level that can be downloaded and printed.+ 250 maze puzzles that can be downloaded and printed.- only 1 verified solution.- all answers are at the end of the book.- exclusive puzzles.- a link to the surprise is at the end of the book.An excellent book for free time and mind exploration.I hope you enjoy the book.Best regards, Basford Holmes