THINKING AND CALCULATING WITH SODUKU

Sifu found one of the best way to relax and filling up the travel time and to improve the thinking and calculating ability with logic that could help chess players is to try the soduku method.

Fill the grid so that every column, every row and every 3x3 box contains the digits 1 to 9. The digits within the cells joined by dotted lines add up to the printed top left-hand figure. Within each dotted-line “shape”, a digit CANNOT be repeated.

2585 Easy

2586 Difficult

Source: The Times Online