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

This Sudoku Puzzle has 67 steps and it is solved using Naked Single, Full House, Hidden Single, Skyscraper, Locked Candidates Type 1 (Pointing), Naked Pair, Turbot Fish, undefined techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 9 → 4 (Naked Single)
  2. Row 8 / Column 9 → 6 (Naked Single)
  3. Row 1 / Column 9 → 1 (Naked Single)
  4. Row 7 / Column 8 → 7 (Naked Single)
  5. Row 9 / Column 9 → 8 (Naked Single)
  6. Row 1 / Column 8 → 6 (Naked Single)
  7. Row 9 / Column 8 → 1 (Naked Single)
  8. Row 3 / Column 8 → 2 (Naked Single)
  9. Row 2 / Column 7 → 7 (Full House)
  10. Row 4 / Column 8 → 8 (Naked Single)
  11. Row 5 / Column 8 → 5 (Full House)
  12. Row 9 / Column 7 → 4 (Naked Single)
  13. Row 8 / Column 7 → 5 (Full House)
  14. Row 2 / Column 3 → 3 (Naked Single)
  15. Row 2 / Column 5 → 2 (Naked Single)
  16. Row 2 / Column 4 → 5 (Naked Single)
  17. Row 2 / Column 1 → 8 (Full House)
  18. Row 5 / Column 2 → 8 (Hidden Single)
  19. Row 3 / Column 6 → 1 (Hidden Single)
  20. Row 1 / Column 2 → 5 (Hidden Single)
  21. Row 6 / Column 1 → 5 (Hidden Single)
  22. Row 8 / Column 1 → 2 (Hidden Single)
  23. Row 6 / Column 4 → 8 (Hidden Single)
  24. Row 5 / Column 7 → 1 (Hidden Single)
  25. Row 4 / Column 7 → 6 (Naked Single)
  26. Row 6 / Column 7 → 2 (Full House)
  27. Row 6 / Column 6 → 9 (Naked Single)
  28. Row 6 / Column 9 → 3 (Naked Single)
  29. Row 4 / Column 9 → 9 (Full House)
  30. Row 4 / Column 1 → 3 (Hidden Single)
  31. Skyscraper: 6 in r5c1,r7c2 (connected by r57c4) => r9c1<>6
  32. Locked Candidates Type 1 (Pointing): 6 in b7 => r3c2<>6
  33. Naked Pair: 4,9 in r38c2 => r7c2<>4, r9c2<>9
  34. Locked Candidates Type 1 (Pointing): 4 in b7 => r8c5<>4
  35. Turbot Fish: 4 r1c5 =4= r4c5 -4- r4c3 =4= r5c1 => r1c1<>4
  36. Locked Candidates Type 1 (Pointing): 4 in b1 => r3c4<>4
  37. Naked Pair: 7,9 in r19c1 => r3c1<>7, r3c1<>9
  38. X-Wing: 7 c16 r19 => r1c45,r9c45<>7
  39. Skyscraper: 9 in r3c4,r8c5 (connected by r38c2) => r1c5,r9c4<>9
  40. Row 1 / Column 5 → 4 (Naked Single)
  41. W-Wing: 4/7 in r4c4,r8c3 connected by 7 in r3c34 => r4c3<>4
  42. Row 4 / Column 3 → 1 (Naked Single)
  43. Row 4 / Column 5 → 7 (Naked Single)
  44. Row 4 / Column 4 → 4 (Full House)
  45. Row 6 / Column 3 → 6 (Naked Single)
  46. Row 5 / Column 1 → 4 (Full House)
  47. Row 6 / Column 5 → 1 (Full House)
  48. Row 8 / Column 5 → 9 (Naked Single)
  49. Row 9 / Column 5 → 6 (Full House)
  50. Row 5 / Column 6 → 2 (Naked Single)
  51. Row 5 / Column 4 → 6 (Full House)
  52. Row 3 / Column 1 → 6 (Naked Single)
  53. Row 8 / Column 2 → 4 (Naked Single)
  54. Row 8 / Column 3 → 7 (Full House)
  55. Row 3 / Column 3 → 4 (Full House)
  56. Row 7 / Column 4 → 3 (Naked Single)
  57. Row 9 / Column 2 → 3 (Naked Single)
  58. Row 3 / Column 2 → 9 (Naked Single)
  59. Row 7 / Column 2 → 6 (Full House)
  60. Row 9 / Column 1 → 9 (Full House)
  61. Row 7 / Column 6 → 4 (Full House)
  62. Row 1 / Column 1 → 7 (Full House)
  63. Row 3 / Column 4 → 7 (Full House)
  64. Row 1 / Column 4 → 9 (Naked Single)
  65. Row 9 / Column 4 → 2 (Full House)
  66. Row 9 / Column 6 → 7 (Full House)
  67. Row 1 / Column 6 → 3 (Full House)
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