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

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

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

Solution Steps:

  1. Row 1 / Column 8 → 1 (Hidden Single)
  2. Row 2 / Column 2 → 7 (Hidden Single)
  3. Row 2 / Column 1 → 5 (Hidden Single)
  4. Row 7 / Column 5 → 1 (Hidden Single)
  5. Row 9 / Column 1 → 1 (Hidden Single)
  6. Row 4 / Column 4 → 1 (Hidden Single)
  7. Row 7 / Column 7 → 3 (Hidden Single)
  8. Row 2 / Column 7 → 2 (Naked Single)
  9. Row 3 / Column 7 → 6 (Naked Single)
  10. Row 1 / Column 9 → 9 (Naked Single)
  11. Row 4 / Column 7 → 5 (Naked Single)
  12. Row 5 / Column 7 → 7 (Full House)
  13. Row 2 / Column 8 → 4 (Naked Single)
  14. Row 2 / Column 9 → 3 (Full House)
  15. Row 8 / Column 2 → 3 (Hidden Single)
  16. Row 9 / Column 8 → 5 (Hidden Single)
  17. Row 1 / Column 5 → 4 (Hidden Single)
  18. Row 8 / Column 3 → 4 (Hidden Single)
  19. Row 6 / Column 2 → 4 (Hidden Single)
  20. Row 5 / Column 6 → 4 (Hidden Single)
  21. Locked Candidates Type 1 (Pointing): 8 in b1 => r3c45<>8
  22. Locked Candidates Type 1 (Pointing): 9 in b1 => r3c45<>9
  23. Locked Candidates Type 1 (Pointing): 2 in b2 => r3c2<>2
  24. Naked Pair: 8,9 in r39c2 => r4c2<>9
  25. Locked Candidates Type 1 (Pointing): 9 in b4 => r5c45<>9
  26. Naked Pair: 8,9 in r27c6 => r48c6<>8, r48c6<>9
  27. Row 4 / Column 5 → 9 (Hidden Single)
  28. Row 9 / Column 2 → 9 (Hidden Single)
  29. Row 3 / Column 2 → 8 (Naked Single)
  30. Row 8 / Column 1 → 6 (Naked Single)
  31. Row 7 / Column 3 → 8 (Full House)
  32. Row 3 / Column 3 → 9 (Naked Single)
  33. Row 1 / Column 1 → 2 (Naked Single)
  34. Row 1 / Column 2 → 6 (Full House)
  35. Row 5 / Column 1 → 9 (Full House)
  36. Row 4 / Column 2 → 2 (Full House)
  37. Row 7 / Column 6 → 9 (Naked Single)
  38. Row 7 / Column 8 → 6 (Full House)
  39. Row 4 / Column 6 → 6 (Naked Single)
  40. Row 4 / Column 8 → 8 (Full House)
  41. Row 2 / Column 6 → 8 (Naked Single)
  42. Row 2 / Column 4 → 9 (Full House)
  43. Row 6 / Column 8 → 2 (Naked Single)
  44. Row 5 / Column 9 → 6 (Full House)
  45. Row 8 / Column 8 → 9 (Full House)
  46. Row 6 / Column 6 → 7 (Naked Single)
  47. Row 8 / Column 6 → 2 (Full House)
  48. Row 5 / Column 3 → 5 (Naked Single)
  49. Row 6 / Column 3 → 6 (Full House)
  50. Row 6 / Column 5 → 3 (Naked Single)
  51. Row 6 / Column 4 → 5 (Full House)
  52. Row 8 / Column 4 → 8 (Naked Single)
  53. Row 8 / Column 9 → 7 (Full House)
  54. Row 9 / Column 5 → 7 (Full House)
  55. Row 9 / Column 9 → 8 (Full House)
  56. Row 3 / Column 5 → 2 (Naked Single)
  57. Row 3 / Column 4 → 3 (Full House)
  58. Row 5 / Column 4 → 2 (Full House)
  59. Row 5 / Column 5 → 8 (Full House)
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