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

This Sudoku Puzzle has 59 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 2 (Claiming), undefined techniques.

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

Solution Steps:

  1. Row 5 / Column 3 → 1 (Hidden Single)
  2. Row 4 / Column 9 → 2 (Hidden Single)
  3. Row 8 / Column 9 → 6 (Hidden Single)
  4. Row 5 / Column 7 → 6 (Hidden Single)
  5. Row 2 / Column 2 → 4 (Hidden Single)
  6. Row 2 / Column 8 → 8 (Hidden Single)
  7. Row 2 / Column 9 → 9 (Naked Single)
  8. Row 5 / Column 1 → 5 (Hidden Single)
  9. Row 4 / Column 4 → 6 (Hidden Single)
  10. Row 2 / Column 4 → 2 (Naked Single)
  11. Row 2 / Column 6 → 5 (Naked Single)
  12. Row 2 / Column 3 → 6 (Full House)
  13. Row 1 / Column 5 → 6 (Hidden Single)
  14. Row 4 / Column 6 → 1 (Hidden Single)
  15. Row 1 / Column 6 → 7 (Naked Single)
  16. Row 6 / Column 6 → 2 (Hidden Single)
  17. Row 6 / Column 1 → 6 (Hidden Single)
  18. Row 3 / Column 5 → 1 (Hidden Single)
  19. Row 3 / Column 4 → 9 (Full House)
  20. Row 3 / Column 9 → 3 (Naked Single)
  21. Row 1 / Column 9 → 1 (Hidden Single)
  22. Row 8 / Column 4 → 1 (Hidden Single)
  23. Row 1 / Column 8 → 4 (Hidden Single)
  24. Row 5 / Column 9 → 4 (Hidden Single)
  25. Row 8 / Column 8 → 5 (Hidden Single)
  26. Row 7 / Column 3 → 5 (Hidden Single)
  27. Row 3 / Column 2 → 5 (Hidden Single)
  28. Row 3 / Column 7 → 2 (Naked Single)
  29. Row 1 / Column 7 → 5 (Full House)
  30. Row 3 / Column 1 → 7 (Naked Single)
  31. Row 3 / Column 3 → 8 (Full House)
  32. Row 6 / Column 2 → 8 (Hidden Single)
  33. Locked Candidates Type 2 (Claiming): 7 in r8 => r9c3<>7
  34. W-Wing: 3/9 in r8c6,r9c7 connected by 9 in r7c57 => r9c6<>3
  35. Row 8 / Column 6 → 3 (Hidden Single)
  36. Row 8 / Column 2 → 7 (Naked Single)
  37. Row 4 / Column 2 → 3 (Full House)
  38. Row 8 / Column 3 → 9 (Full House)
  39. Row 4 / Column 8 → 7 (Full House)
  40. Row 6 / Column 3 → 7 (Full House)
  41. Row 5 / Column 8 → 9 (Naked Single)
  42. Row 6 / Column 8 → 3 (Full House)
  43. Row 6 / Column 4 → 4 (Naked Single)
  44. Row 6 / Column 5 → 9 (Full House)
  45. Row 7 / Column 4 → 7 (Full House)
  46. Row 5 / Column 6 → 8 (Naked Single)
  47. Row 5 / Column 5 → 7 (Full House)
  48. Row 9 / Column 6 → 9 (Full House)
  49. Row 7 / Column 9 → 8 (Naked Single)
  50. Row 9 / Column 9 → 7 (Full House)
  51. Row 9 / Column 7 → 3 (Naked Single)
  52. Row 7 / Column 7 → 9 (Full House)
  53. Row 7 / Column 5 → 4 (Naked Single)
  54. Row 7 / Column 1 → 3 (Full House)
  55. Row 9 / Column 5 → 8 (Full House)
  56. Row 9 / Column 3 → 2 (Naked Single)
  57. Row 1 / Column 3 → 3 (Full House)
  58. Row 1 / Column 1 → 2 (Full House)
  59. Row 9 / Column 1 → 4 (Full House)
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