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

This Sudoku Puzzle has 59 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, Empty Rectangle techniques.

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

Solution Steps:

  1. Row 2 / Column 5 → 7 (Hidden Single)
  2. Row 4 / Column 1 → 8 (Hidden Single)
  3. Row 8 / Column 9 → 8 (Hidden Single)
  4. Row 1 / Column 5 → 2 (Hidden Single)
  5. Row 2 / Column 7 → 9 (Hidden Single)
  6. Row 6 / Column 1 → 9 (Hidden Single)
  7. Row 6 / Column 7 → 2 (Hidden Single)
  8. Row 6 / Column 6 → 7 (Hidden Single)
  9. Row 5 / Column 2 → 2 (Hidden Single)
  10. Row 2 / Column 3 → 2 (Hidden Single)
  11. Row 7 / Column 4 → 7 (Hidden Single)
  12. Row 3 / Column 8 → 2 (Hidden Single)
  13. Row 5 / Column 1 → 7 (Hidden Single)
  14. Row 9 / Column 9 → 2 (Hidden Single)
  15. Row 8 / Column 3 → 6 (Hidden Single)
  16. Row 8 / Column 2 → 7 (Hidden Single)
  17. Row 7 / Column 3 → 1 (Hidden Single)
  18. Row 8 / Column 7 → 1 (Hidden Single)
  19. Row 1 / Column 7 → 4 (Naked Single)
  20. Row 4 / Column 7 → 3 (Full House)
  21. Row 4 / Column 3 → 4 (Naked Single)
  22. Row 6 / Column 3 → 3 (Full House)
  23. Row 5 / Column 6 → 3 (Hidden Single)
  24. Locked Candidates Type 1 (Pointing): 4 in b2 => r3c12<>4
  25. Naked Triple: 3,4,9 in r7c6,r89c5 => r9c46<>4, r9c46<>9
  26. Row 1 / Column 4 → 9 (Hidden Single)
  27. Empty Rectangle: 4 in b8 (r67c9) => r6c5<>4
  28. Row 6 / Column 5 → 5 (Naked Single)
  29. Row 4 / Column 5 → 9 (Naked Single)
  30. Row 4 / Column 6 → 1 (Naked Single)
  31. Row 4 / Column 9 → 5 (Full House)
  32. Row 5 / Column 4 → 4 (Full House)
  33. Row 5 / Column 8 → 1 (Full House)
  34. Row 9 / Column 6 → 6 (Naked Single)
  35. Row 7 / Column 9 → 4 (Naked Single)
  36. Row 3 / Column 4 → 6 (Naked Single)
  37. Row 9 / Column 4 → 1 (Full House)
  38. Row 1 / Column 6 → 8 (Naked Single)
  39. Row 3 / Column 6 → 4 (Full House)
  40. Row 7 / Column 6 → 9 (Full House)
  41. Row 6 / Column 9 → 6 (Naked Single)
  42. Row 2 / Column 9 → 1 (Full House)
  43. Row 6 / Column 8 → 4 (Full House)
  44. Row 3 / Column 1 → 3 (Naked Single)
  45. Row 3 / Column 2 → 8 (Full House)
  46. Row 1 / Column 2 → 5 (Naked Single)
  47. Row 1 / Column 8 → 6 (Naked Single)
  48. Row 1 / Column 1 → 1 (Full House)
  49. Row 2 / Column 8 → 8 (Full House)
  50. Row 8 / Column 1 → 4 (Naked Single)
  51. Row 8 / Column 5 → 3 (Full House)
  52. Row 9 / Column 5 → 4 (Full House)
  53. Row 2 / Column 2 → 4 (Naked Single)
  54. Row 2 / Column 1 → 6 (Full House)
  55. Row 9 / Column 1 → 5 (Full House)
  56. Row 7 / Column 2 → 3 (Naked Single)
  57. Row 7 / Column 8 → 5 (Full House)
  58. Row 9 / Column 8 → 3 (Full House)
  59. Row 9 / Column 2 → 9 (Full House)
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