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3
8
2
9
4
6
8
5
1
7
1
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8
9
8
1
3
5
8
4
3
9
6
2
1
5
7
6
1
4
2024-10-05(Intermediate) Puzzles
Logic-driven puzzles for step-up solving
Compare candidates to find the best order.
Tips for Solving Sudoku
- Start with squares with fewer numbers: Begin with rows, columns, or blocks that already have more numbers filled; fewer candidates make it easier to solve.
- Pencil marks (notes): For beginners, write possible numbers in small font in empty squares for reference.
- Review: If stuck, check for duplicate numbers or rule violations.
- Basic rule: Do not repeat the same number in the same row, column, or 3x3 block.