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

This Sudoku Puzzle has 59 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Skyscraper, Full House techniques.

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

Solution Steps:

  1. Row 3 / Column 2 → 4 (Hidden Single)
  2. Row 1 / Column 9 → 4 (Hidden Single)
  3. Row 1 / Column 4 → 7 (Hidden Single)
  4. Row 5 / Column 4 → 2 (Hidden Single)
  5. Row 1 / Column 6 → 2 (Hidden Single)
  6. Row 1 / Column 7 → 8 (Naked Single)
  7. Row 1 / Column 8 → 1 (Naked Single)
  8. Row 3 / Column 8 → 3 (Naked Single)
  9. Row 5 / Column 3 → 4 (Hidden Single)
  10. Row 8 / Column 4 → 4 (Hidden Single)
  11. Row 4 / Column 5 → 4 (Hidden Single)
  12. Row 8 / Column 8 → 2 (Hidden Single)
  13. Row 1 / Column 5 → 9 (Hidden Single)
  14. Row 9 / Column 6 → 9 (Hidden Single)
  15. Row 4 / Column 9 → 1 (Hidden Single)
  16. Row 2 / Column 5 → 3 (Hidden Single)
  17. Row 5 / Column 1 → 1 (Hidden Single)
  18. Row 2 / Column 1 → 8 (Naked Single)
  19. Row 2 / Column 3 → 1 (Naked Single)
  20. Row 5 / Column 8 → 9 (Hidden Single)
  21. Locked Candidates Type 1 (Pointing): 3 in b5 => r7c6<>3
  22. Skyscraper: 8 in r4c6,r8c5 (connected by r48c3) => r6c5,r7c6<>8
  23. Row 6 / Column 5 → 6 (Naked Single)
  24. Row 5 / Column 6 → 3 (Naked Single)
  25. Row 4 / Column 6 → 8 (Full House)
  26. Row 6 / Column 1 → 5 (Naked Single)
  27. Row 3 / Column 6 → 5 (Naked Single)
  28. Row 7 / Column 6 → 6 (Full House)
  29. Row 5 / Column 2 → 6 (Naked Single)
  30. Row 5 / Column 7 → 5 (Full House)
  31. Row 1 / Column 2 → 5 (Naked Single)
  32. Row 1 / Column 3 → 6 (Full House)
  33. Row 4 / Column 1 → 9 (Naked Single)
  34. Row 8 / Column 1 → 6 (Full House)
  35. Row 8 / Column 7 → 3 (Naked Single)
  36. Row 8 / Column 9 → 5 (Naked Single)
  37. Row 8 / Column 5 → 8 (Naked Single)
  38. Row 8 / Column 3 → 9 (Full House)
  39. Row 9 / Column 9 → 7 (Naked Single)
  40. Row 3 / Column 5 → 1 (Naked Single)
  41. Row 3 / Column 4 → 8 (Full House)
  42. Row 7 / Column 5 → 5 (Full House)
  43. Row 9 / Column 4 → 3 (Naked Single)
  44. Row 7 / Column 4 → 1 (Full House)
  45. Row 2 / Column 9 → 2 (Naked Single)
  46. Row 2 / Column 7 → 7 (Full House)
  47. Row 6 / Column 9 → 3 (Full House)
  48. Row 7 / Column 8 → 8 (Naked Single)
  49. Row 9 / Column 8 → 6 (Full House)
  50. Row 4 / Column 8 → 7 (Full House)
  51. Row 9 / Column 2 → 8 (Naked Single)
  52. Row 9 / Column 3 → 5 (Full House)
  53. Row 4 / Column 7 → 6 (Naked Single)
  54. Row 6 / Column 7 → 2 (Full House)
  55. Row 4 / Column 3 → 3 (Full House)
  56. Row 6 / Column 2 → 7 (Naked Single)
  57. Row 6 / Column 3 → 8 (Full House)
  58. Row 7 / Column 3 → 7 (Full House)
  59. Row 7 / Column 2 → 3 (Full House)
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