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

This Sudoku Puzzle has 62 steps and it is solved using Naked Single, Full House, Hidden Single, Naked Pair, Naked Triple, Swordfish, Skyscraper techniques.

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

Solution Steps:

  1. Row 9 / Column 8 → 8 (Naked Single)
  2. Row 7 / Column 8 → 1 (Naked Single)
  3. Row 8 / Column 8 → 6 (Naked Single)
  4. Row 1 / Column 8 → 5 (Naked Single)
  5. Row 8 / Column 7 → 2 (Naked Single)
  6. Row 8 / Column 9 → 7 (Full House)
  7. Row 9 / Column 4 → 2 (Hidden Single)
  8. Row 2 / Column 4 → 5 (Hidden Single)
  9. Row 5 / Column 3 → 2 (Hidden Single)
  10. Row 7 / Column 1 → 2 (Hidden Single)
  11. Row 1 / Column 9 → 2 (Hidden Single)
  12. Row 3 / Column 5 → 2 (Hidden Single)
  13. Row 5 / Column 2 → 7 (Hidden Single)
  14. Row 2 / Column 3 → 7 (Hidden Single)
  15. Row 8 / Column 5 → 4 (Hidden Single)
  16. Row 9 / Column 6 → 3 (Naked Single)
  17. Row 9 / Column 2 → 4 (Full House)
  18. Row 3 / Column 4 → 7 (Hidden Single)
  19. Row 7 / Column 5 → 7 (Hidden Single)
  20. Row 6 / Column 3 → 4 (Hidden Single)
  21. Row 3 / Column 6 → 4 (Hidden Single)
  22. Row 1 / Column 1 → 4 (Hidden Single)
  23. Row 5 / Column 7 → 4 (Hidden Single)
  24. Row 2 / Column 5 → 9 (Hidden Single)
  25. Row 1 / Column 2 → 8 (Hidden Single)
  26. Row 7 / Column 2 → 5 (Naked Single)
  27. Row 7 / Column 6 → 9 (Naked Single)
  28. Row 7 / Column 4 → 8 (Full House)
  29. Row 8 / Column 4 → 1 (Naked Single)
  30. Row 8 / Column 6 → 5 (Full House)
  31. Row 1 / Column 4 → 6 (Naked Single)
  32. Row 1 / Column 6 → 1 (Full House)
  33. Row 5 / Column 6 → 6 (Full House)
  34. Naked Pair: 3,9 in r5c48 => r5c19<>3, r5c1<>9
  35. Naked Triple: 1,3,8 in r4c3,r5c1,r6c2 => r46c1<>1, r46c1<>3, r46c1<>8
  36. Swordfish: 3 r248 c139 => r36c9<>3
  37. Naked Pair: 1,8 in r35c9 => r246c9<>1, r46c9<>8
  38. Skyscraper: 1 in r2c7,r5c9 (connected by r25c1) => r3c9,r46c7<>1
  39. Row 3 / Column 9 → 8 (Naked Single)
  40. Row 5 / Column 9 → 1 (Naked Single)
  41. Row 5 / Column 1 → 8 (Naked Single)
  42. Row 4 / Column 3 → 3 (Naked Single)
  43. Row 8 / Column 3 → 8 (Full House)
  44. Row 8 / Column 1 → 3 (Full House)
  45. Row 4 / Column 9 → 5 (Naked Single)
  46. Row 6 / Column 2 → 1 (Naked Single)
  47. Row 3 / Column 2 → 3 (Full House)
  48. Row 2 / Column 1 → 1 (Full House)
  49. Row 4 / Column 1 → 9 (Naked Single)
  50. Row 6 / Column 1 → 5 (Full House)
  51. Row 6 / Column 9 → 6 (Naked Single)
  52. Row 2 / Column 9 → 3 (Full House)
  53. Row 2 / Column 7 → 6 (Full House)
  54. Row 6 / Column 5 → 8 (Naked Single)
  55. Row 4 / Column 5 → 1 (Full House)
  56. Row 4 / Column 7 → 8 (Full House)
  57. Row 3 / Column 8 → 9 (Naked Single)
  58. Row 3 / Column 7 → 1 (Full House)
  59. Row 6 / Column 7 → 9 (Full House)
  60. Row 5 / Column 8 → 3 (Full House)
  61. Row 6 / Column 4 → 3 (Full House)
  62. Row 5 / Column 4 → 9 (Full House)
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