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

This Sudoku Puzzle has 28 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Naked Pair, Empty Rectangle, Discontinuous Nice Loop, Give Up techniques.

Naked Single Explanation
Hidden Single Explanation
Locked Candidates Explanation
Full House Explanation
Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 6 → 3 (Naked Single)
  2. Row 5 / Column 4 → 4 (Naked Single)
  3. Row 5 / Column 5 → 2 (Naked Single)
  4. Row 1 / Column 3 → 8 (Hidden Single)
  5. Row 2 / Column 4 → 8 (Hidden Single)
  6. Row 5 / Column 9 → 9 (Hidden Single)
  7. Row 3 / Column 9 → 5 (Hidden Single)
  8. Row 3 / Column 3 → 4 (Hidden Single)
  9. Row 2 / Column 8 → 4 (Hidden Single)
  10. Row 7 / Column 5 → 4 (Hidden Single)
  11. Row 3 / Column 4 → 3 (Hidden Single)
  12. Row 6 / Column 7 → 8 (Hidden Single)
  13. Row 6 / Column 1 → 4 (Hidden Single)
  14. Row 8 / Column 2 → 4 (Hidden Single)
  15. Row 6 / Column 5 → 5 (Hidden Single)
  16. Row 6 / Column 4 → 6 (Full House)
  17. Locked Candidates Type 1 (Pointing): 3 in b1 => r2c79<>3
  18. Locked Candidates Type 1 (Pointing): 6 in b1 => r2c59<>6
  19. Locked Candidates Type 1 (Pointing): 7 in b1 => r2c57<>7
  20. Locked Candidates Type 1 (Pointing): 1 in b2 => r9c5<>1
  21. Locked Candidates Type 1 (Pointing): 9 in b2 => r9c5<>9
  22. Locked Candidates Type 1 (Pointing): 6 in b3 => r1c5<>6
  23. Locked Candidates Type 1 (Pointing): 1 in b6 => r4c13<>1
  24. Naked Pair: 2,3 in r4c1,r6c3 => r4c23<>3, r4c3<>2
  25. Empty Rectangle: 2 in b9 (r6c38) => r8c3<>2
  26. Empty Rectangle: 3 in b9 (r6c38) => r7c3<>3
  27. Discontinuous Nice Loop: 7 r8c7 -7- r3c7 -1- r2c9 -2- r2c7 =2= r8c7 => r8c7<>7
  28. Give Up: Don't know how to proceed!
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