Hard Math Puzzles For Adults: Sujiken Puzzles – The Best Stress Relief Puzzles: 5 (Brain Games For Adults)

Sujiken (from Japanese «sujikai», literally «diagonal») is a variation of Sudoku, invented by George Heineman (USA). 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.

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Editorial ‏ : ‎ Independently published; Large type / Large print edición (1 septiembre 2018)
Idioma ‏ : ‎ Inglés
Tapa blanda ‏ : ‎ 115 páginas
ISBN-10 ‏ : ‎ 1720012911
ISBN-13 ‏ : ‎ 978-1720012917
Peso del producto ‏ : ‎ 181 g
Dimensiones ‏ : ‎ 15.24 x 0.74 x 22.86 cm