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

This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Hidden Single, Full House, Naked Pair, undefined techniques.

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

Solution Steps:

  1. Row 2 / Column 7 → 2 (Naked Single)
  2. Row 3 / Column 7 → 9 (Naked Single)
  3. Row 8 / Column 7 → 1 (Hidden Single)
  4. Row 1 / Column 3 → 2 (Hidden Single)
  5. Row 4 / Column 9 → 2 (Hidden Single)
  6. Row 8 / Column 8 → 3 (Hidden Single)
  7. Row 1 / Column 2 → 9 (Hidden Single)
  8. Row 4 / Column 5 → 4 (Hidden Single)
  9. Row 4 / Column 3 → 7 (Hidden Single)
  10. Row 2 / Column 3 → 6 (Naked Single)
  11. Row 2 / Column 1 → 3 (Naked Single)
  12. Row 4 / Column 1 → 5 (Naked Single)
  13. Row 4 / Column 7 → 3 (Full House)
  14. Row 6 / Column 7 → 5 (Full House)
  15. Row 3 / Column 1 → 1 (Naked Single)
  16. Row 3 / Column 3 → 5 (Naked Single)
  17. Row 6 / Column 1 → 9 (Naked Single)
  18. Row 5 / Column 2 → 3 (Hidden Single)
  19. Row 5 / Column 8 → 9 (Hidden Single)
  20. Row 8 / Column 3 → 9 (Hidden Single)
  21. Row 9 / Column 9 → 9 (Hidden Single)
  22. Row 7 / Column 9 → 5 (Naked Single)
  23. Row 8 / Column 9 → 7 (Naked Single)
  24. Row 5 / Column 3 → 8 (Hidden Single)
  25. Row 6 / Column 3 → 1 (Full House)
  26. Row 7 / Column 5 → 9 (Hidden Single)
  27. Row 5 / Column 5 → 1 (Hidden Single)
  28. Naked Pair: 2,6 in r9c18 => r9c46<>2, r9c46<>6
  29. W-Wing: 7/4 in r1c8,r3c2 connected by 4 in r2c29 => r3c8<>7
  30. Row 1 / Column 8 → 7 (Hidden Single)
  31. Row 1 / Column 5 → 5 (Naked Single)
  32. Row 1 / Column 6 → 3 (Naked Single)
  33. Row 1 / Column 4 → 4 (Full House)
  34. Row 6 / Column 4 → 3 (Hidden Single)
  35. W-Wing: 6/7 in r3c4,r6c6 connected by 7 in r9c46 => r3c6<>6
  36. Row 3 / Column 4 → 6 (Hidden Single)
  37. Row 9 / Column 4 → 7 (Hidden Single)
  38. Row 9 / Column 6 → 5 (Naked Single)
  39. Row 5 / Column 6 → 2 (Naked Single)
  40. Row 5 / Column 4 → 5 (Full House)
  41. Row 8 / Column 4 → 2 (Naked Single)
  42. Row 7 / Column 4 → 1 (Full House)
  43. Row 9 / Column 2 → 1 (Naked Single)
  44. Row 8 / Column 1 → 6 (Naked Single)
  45. Row 9 / Column 1 → 2 (Full House)
  46. Row 9 / Column 8 → 6 (Full House)
  47. Row 7 / Column 8 → 2 (Full House)
  48. Row 7 / Column 2 → 8 (Naked Single)
  49. Row 7 / Column 6 → 6 (Full House)
  50. Row 8 / Column 5 → 8 (Full House)
  51. Row 8 / Column 2 → 5 (Full House)
  52. Row 6 / Column 6 → 7 (Naked Single)
  53. Row 3 / Column 6 → 8 (Full House)
  54. Row 2 / Column 5 → 7 (Full House)
  55. Row 6 / Column 5 → 6 (Full House)
  56. Row 3 / Column 8 → 4 (Naked Single)
  57. Row 2 / Column 9 → 8 (Full House)
  58. Row 2 / Column 2 → 4 (Full House)
  59. Row 3 / Column 2 → 7 (Full House)
  60. Row 6 / Column 8 → 8 (Full House)
  61. Row 6 / Column 9 → 4 (Full House)
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