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Evil · Puzzle #544
7
4
5
9
2
1
3
5
3
4
2
7
2
9
8
7
2
1
6
8
7
4
4
8
1
3
"I have added these principles to the law: get the knights into action before both bishops are developed." — José Raúl Capablanca
"I have added these principles to the law: get the knights into action before both bishops are developed." — José Raúl Capablanca
There are Sudoku variants with extra constraints: Killer Sudoku (cage sums), Diagonal Sudoku, and even 3D Sudoku.
There are Sudoku variants with extra constraints: Killer Sudoku (cage sums), Diagonal Sudoku, and even 3D Sudoku.