About Logic9

Logic9 is a version of the popular puzzle Sudoko, which is a craze around the world.

It appears daily in Today paper (as SudokuPlus) and MyPaper (as Logic9).

The puzzle contains 81 squares arranged in 9 X 9. You have to fill in the blanks with the numbers 1 to 9, so that it does not repeat in any row, column or box (3X3 squares). The numbers do not have to be in sequential order.
The game has several levels of difficulty. You can start at the "very easy" level and progress to the higher levels.

Logic9 is suitable for people of all ages. It trains children in mathematics, logic and patterns. It helps seniors to exercise their mind (and keep away dementia).

Logic9 is created by Tan Kin Lian. He wrote a computer programme to generate the puzzles that are used in this website. Apart from using numbers, the game can be played with pictures and colours.