Sudoku is a popular puzzle game to hone your logical thinking skills. The rule of the game is as simple as placing the digits from 1 to 9 in a 9x9 grid so that each row, each column, and each 3x3 sub-grid contains digits 1 through 9.
If you like this type of logic game but with a mathematical transliteration of crossword, then this logic game Kakuro fills the bill.
Kakuro, originally called Cross Sums, is an abbreviation of Japanese kasan kurosu, which means "addition cross". The rule of the game is simple as well. To complete an entry of consecutive cells, put the digits within the range from 1 to 9 so that they sum up to the clue number given on the top or to the left of the entry, in which no digits may appear more than once.
In Kakuro, a clue number ranges from 3 to 49, and the number of consecutive cells ranges from 2 to 9. A typical shorthand for referring to an entry is "(a clue number)-in-(the number of consecutive cells, spelled out).
For example, 3-in-two. It means the clue number 3 sums up in two consecutive cells, in which the solutions are 1 and 2.
Play Kakuro in a web browser by heading to KakuroConquest, which offers free online kakuro puzzles in different grid sizes and difficulty levels. Or try this excellent mobile app Real Kakuro for free, available on Android and iOS platforms.
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This article is maintained by volunteer editor Jojo Yee. Registered members can contact the editor with comments or suggestions by clicking here.