Sudoku Sujikai - 200 Easy to Master Puzzles (Volume 2) in Bloomington, MN

Sujikai
(literally "
diagonal
") is a variation of Sudoku. The puzzle consists of a triangular grid of cells containing digits from
1 to 9
. The objective is to fill a grid with digits so that each cell contains a digit and no digit is repeated in any column, row and diagonal in any direction. Also, no digit occurs twice in any of the three larger
3 x 3
square regions and any of the three larger triangular regions enclosed by thick borders.