Sudoku Trivia

There are Sudoku variants with extra constraints: Killer Sudoku (cage sums), Diagonal Sudoku, and even 3D Sudoku.

Sudoku Trivia
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9
5
3
6
2
7
5
4
1
8
4
3
9
1
4
3
5
7
8
1
9
5
7
8
3
2
9
4
2
5
7
6
3
6
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9
4
5
1
8
7
3
8
6
2
Chess Wisdom

"The essence of chess is thinking about what chess is." — David Bronstein

Chess Wisdom