Kakuro puzzles are number puzzles solved in a crossword style grid.A number above the diagonal line in a grey square represents the total of the numbers in the white squares to the right of it, similarly, a number below the diagonal line is the total sum of the digits in the white squares below it. The white squares can contain any of the digits 1 to 9, however, these digits cannot be repeated more than once in any vertical column or horizontal line to make the target number. For example, if the total number in the black square is 4 and there are 2 white squares, the digits must be 1 and 3, they cannot be 2 and 2.Features:6 x 9 inches formatPremium glossy cover200 puzzles ready to be solvedSolutions includedKws: kakuro puzzle books adults, kakuro puzzle, kakuro puzzle book, kakuro puzzle books for adults, kakuro puzzles, kakuro books, kokoro book, mensa kakuro, mensa puzzle book