Sudoku
Sudoku is logical game with digits. The name come from abbreviation "suji wa dokushin ni kagiru", meaning "the digits must occur only once".

4 | 7 | 5 | 8 | |||||
3 | 1 | 2 | ||||||
8 | 4 | 3 | ||||||
9 | 8 | 4 | 1 | 3 | 5 | |||
2 | 3 | 9 | 1 | |||||
1 | 6 | 7 | ||||||
9 | 5 | 2 | 4 | |||||
6 | 8 | 1 | 9 | |||||
6 | 8 | 5 |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |


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