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6
9
2
2
1
7
5
9
1
8
6
6
3
5
1
1
7
2
6
1
7
6
3
5
9
7
2
4
7
2
1
2025-04-03(Intermediate) Puzzles
Enjoy reasoning while 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.