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

This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, undefined, Naked Pair, Turbot Fish techniques.

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

Solution Steps:

  1. Row 1 / Column 4 → 7 (Naked Single)
  2. Row 4 / Column 5 → 2 (Naked Single)
  3. Row 7 / Column 4 → 5 (Naked Single)
  4. Row 3 / Column 4 → 2 (Naked Single)
  5. Row 5 / Column 4 → 3 (Naked Single)
  6. Row 4 / Column 6 → 7 (Naked Single)
  7. Row 9 / Column 4 → 1 (Naked Single)
  8. Row 8 / Column 4 → 9 (Full House)
  9. Row 5 / Column 6 → 5 (Naked Single)
  10. Row 6 / Column 5 → 9 (Full House)
  11. Row 8 / Column 5 → 8 (Naked Single)
  12. Row 2 / Column 5 → 5 (Full House)
  13. Row 3 / Column 6 → 8 (Naked Single)
  14. Row 1 / Column 6 → 6 (Full House)
  15. Row 7 / Column 6 → 4 (Naked Single)
  16. Row 2 / Column 9 → 6 (Hidden Single)
  17. Row 1 / Column 2 → 3 (Hidden Single)
  18. Row 1 / Column 7 → 9 (Hidden Single)
  19. Row 3 / Column 2 → 9 (Hidden Single)
  20. Row 8 / Column 2 → 4 (Hidden Single)
  21. Locked Candidates Type 1 (Pointing): 4 in b1 => r46c3<>4
  22. Locked Candidates Type 1 (Pointing): 4 in b3 => r6c8<>4
  23. Naked Triple: 2,7,8 in r79c2,r8c1 => r89c3<>2, r8c3<>7, r9c3<>8
  24. Locked Candidates Type 1 (Pointing): 8 in b7 => r5c2<>8
  25. 2-String Kite: 8 in r1c3,r4c7 (connected by r1c8,r2c7) => r4c3<>8
  26. Row 4 / Column 3 → 3 (Naked Single)
  27. Locked Candidates Type 1 (Pointing): 8 in b4 => r2c1<>8
  28. Naked Pair: 2,7 in r5c2,r6c3 => r56c1<>2, r56c1<>7
  29. Row 6 / Column 1 → 4 (Naked Single)
  30. Row 4 / Column 9 → 4 (Hidden Single)
  31. Turbot Fish: 7 r6c3 =7= r5c2 -7- r7c2 =7= r7c8 => r6c8<>7
  32. W-Wing: 8/7 in r5c9,r7c8 connected by 7 in r57c2 => r5c8,r9c9<>8
  33. Row 5 / Column 9 → 8 (Hidden Single)
  34. Row 4 / Column 7 → 1 (Naked Single)
  35. Row 4 / Column 1 → 8 (Full House)
  36. Row 5 / Column 1 → 1 (Naked Single)
  37. Row 2 / Column 7 → 8 (Hidden Single)
  38. Row 1 / Column 8 → 4 (Naked Single)
  39. Row 1 / Column 3 → 8 (Full House)
  40. Row 8 / Column 8 → 1 (Hidden Single)
  41. Row 3 / Column 3 → 4 (Hidden Single)
  42. Row 8 / Column 3 → 6 (Hidden Single)
  43. Row 9 / Column 3 → 5 (Naked Single)
  44. Row 9 / Column 9 → 3 (Naked Single)
  45. Row 9 / Column 6 → 2 (Naked Single)
  46. Row 8 / Column 6 → 3 (Full House)
  47. Row 9 / Column 2 → 8 (Naked Single)
  48. Row 9 / Column 8 → 6 (Full House)
  49. Row 7 / Column 2 → 7 (Naked Single)
  50. Row 5 / Column 2 → 2 (Full House)
  51. Row 7 / Column 8 → 8 (Full House)
  52. Row 8 / Column 1 → 2 (Full House)
  53. Row 5 / Column 8 → 7 (Full House)
  54. Row 6 / Column 3 → 7 (Full House)
  55. Row 2 / Column 1 → 7 (Full House)
  56. Row 2 / Column 3 → 2 (Full House)
  57. Row 3 / Column 8 → 5 (Naked Single)
  58. Row 3 / Column 7 → 7 (Full House)
  59. Row 6 / Column 8 → 2 (Full House)
  60. Row 6 / Column 9 → 5 (Naked Single)
  61. Row 6 / Column 7 → 3 (Full House)
  62. Row 8 / Column 7 → 5 (Full House)
  63. Row 8 / Column 9 → 7 (Full House)
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