The Times Ultimate Su Doku: A bumper book for the Su Doku addict in your life (The Times Su Doku) by Wayne Gould
The ultimate treat for the Su Doku fan, a new collection of 150 puzzles.
The ultimate treat for Su Doku fans : a new collection of 150 unpublished puzzles of all levels.
10 6x6 grids, beginning at Easy
20 Easy puzzles
30 Mild puzzles
40 Difficult puzzles
30 Fiendish puzzles
10 Ultra Fiendish puzzles
10 16x16 grids, beginning at Easy
Su Doku is a number grid consisting of 9 large squares each divided into 9 smaller squares.Between 3 and 4 numbers are already provided in each of the smaller squares.The point is to fill the grid so that every column,every row and every 3x3 box contains the digits 1 to 9.