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

This Sudoku Puzzle has 58 steps and it is solved using Hidden Single, Locked Candidates Type 2 (Claiming), Naked Pair, Naked Single, Full House techniques.

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

Solution Steps:

  1. Row 4 / Column 7 → 8 (Hidden Single)
  2. Row 3 / Column 2 → 2 (Hidden Single)
  3. Row 6 / Column 1 → 6 (Hidden Single)
  4. Row 7 / Column 5 → 2 (Hidden Single)
  5. Row 8 / Column 7 → 2 (Hidden Single)
  6. Locked Candidates Type 2 (Claiming): 3 in c5 => r123c4,r23c6<>3
  7. Naked Pair: 3,9 in r1c25 => r1c18<>3, r1c148<>9
  8. Row 1 / Column 4 → 6 (Naked Single)
  9. Row 7 / Column 8 → 6 (Hidden Single)
  10. Row 3 / Column 9 → 6 (Hidden Single)
  11. Row 8 / Column 6 → 6 (Hidden Single)
  12. Row 7 / Column 7 → 7 (Hidden Single)
  13. Row 2 / Column 7 → 9 (Naked Single)
  14. Row 3 / Column 7 → 5 (Naked Single)
  15. Row 6 / Column 7 → 4 (Full House)
  16. Row 1 / Column 8 → 7 (Naked Single)
  17. Row 2 / Column 9 → 3 (Full House)
  18. Row 1 / Column 1 → 5 (Naked Single)
  19. Row 8 / Column 9 → 5 (Hidden Single)
  20. Row 9 / Column 8 → 9 (Naked Single)
  21. Row 9 / Column 9 → 4 (Full House)
  22. Row 9 / Column 5 → 1 (Naked Single)
  23. Row 9 / Column 2 → 8 (Naked Single)
  24. Row 9 / Column 6 → 5 (Full House)
  25. Row 7 / Column 3 → 4 (Hidden Single)
  26. Row 6 / Column 3 → 5 (Hidden Single)
  27. Row 5 / Column 4 → 4 (Hidden Single)
  28. Row 5 / Column 8 → 5 (Hidden Single)
  29. Row 5 / Column 1 → 8 (Hidden Single)
  30. Row 8 / Column 4 → 8 (Hidden Single)
  31. Row 2 / Column 6 → 8 (Hidden Single)
  32. Row 4 / Column 2 → 4 (Hidden Single)
  33. Row 7 / Column 1 → 1 (Hidden Single)
  34. Row 2 / Column 1 → 7 (Naked Single)
  35. Row 2 / Column 3 → 1 (Naked Single)
  36. Row 2 / Column 4 → 2 (Full House)
  37. Row 6 / Column 9 → 7 (Hidden Single)
  38. Row 4 / Column 6 → 2 (Hidden Single)
  39. Row 4 / Column 8 → 3 (Naked Single)
  40. Row 6 / Column 8 → 2 (Full House)
  41. Row 4 / Column 1 → 9 (Naked Single)
  42. Row 8 / Column 1 → 3 (Full House)
  43. Row 8 / Column 3 → 9 (Full House)
  44. Row 4 / Column 3 → 7 (Naked Single)
  45. Row 4 / Column 9 → 1 (Full House)
  46. Row 3 / Column 3 → 3 (Full House)
  47. Row 5 / Column 9 → 9 (Full House)
  48. Row 1 / Column 2 → 9 (Full House)
  49. Row 1 / Column 5 → 3 (Full House)
  50. Row 3 / Column 5 → 9 (Full House)
  51. Row 6 / Column 2 → 3 (Naked Single)
  52. Row 5 / Column 2 → 1 (Full House)
  53. Row 5 / Column 6 → 3 (Full House)
  54. Row 6 / Column 4 → 9 (Full House)
  55. Row 3 / Column 4 → 1 (Naked Single)
  56. Row 3 / Column 6 → 7 (Full House)
  57. Row 7 / Column 6 → 9 (Full House)
  58. Row 7 / Column 4 → 3 (Full House)
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