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

This Sudoku Puzzle has 58 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 2 (Claiming), Full House, Skyscraper techniques.

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

Solution Steps:

  1. Row 4 / Column 1 → 5 (Hidden Single)
  2. Row 3 / Column 2 → 5 (Hidden Single)
  3. Row 1 / Column 4 → 7 (Hidden Single)
  4. Row 9 / Column 3 → 7 (Hidden Single)
  5. Row 7 / Column 9 → 7 (Hidden Single)
  6. Row 2 / Column 5 → 5 (Hidden Single)
  7. Row 9 / Column 5 → 3 (Naked Single)
  8. Row 9 / Column 4 → 2 (Naked Single)
  9. Row 9 / Column 6 → 5 (Hidden Single)
  10. Row 3 / Column 8 → 4 (Hidden Single)
  11. Row 5 / Column 5 → 7 (Hidden Single)
  12. Row 6 / Column 1 → 7 (Hidden Single)
  13. Row 1 / Column 3 → 1 (Hidden Single)
  14. Row 8 / Column 8 → 5 (Hidden Single)
  15. Row 2 / Column 7 → 8 (Hidden Single)
  16. Row 1 / Column 6 → 8 (Hidden Single)
  17. Row 7 / Column 6 → 9 (Hidden Single)
  18. Row 3 / Column 1 → 2 (Hidden Single)
  19. Row 1 / Column 2 → 4 (Hidden Single)
  20. Row 2 / Column 9 → 2 (Hidden Single)
  21. Row 1 / Column 1 → 6 (Hidden Single)
  22. Row 5 / Column 3 → 4 (Hidden Single)
  23. Locked Candidates Type 2 (Claiming): 6 in r5 => r4c56,r6c5<>6
  24. Row 4 / Column 5 → 1 (Naked Single)
  25. Row 6 / Column 5 → 8 (Naked Single)
  26. Row 8 / Column 5 → 4 (Naked Single)
  27. Row 7 / Column 5 → 6 (Full House)
  28. Row 7 / Column 4 → 8 (Full House)
  29. Row 8 / Column 9 → 3 (Naked Single)
  30. Row 7 / Column 1 → 3 (Naked Single)
  31. Row 6 / Column 9 → 6 (Naked Single)
  32. Row 4 / Column 9 → 4 (Full House)
  33. Row 2 / Column 1 → 9 (Naked Single)
  34. Row 2 / Column 3 → 3 (Full House)
  35. Row 8 / Column 1 → 8 (Full House)
  36. Row 5 / Column 8 → 8 (Hidden Single)
  37. Row 7 / Column 7 → 4 (Hidden Single)
  38. Row 4 / Column 3 → 6 (Hidden Single)
  39. Row 6 / Column 7 → 1 (Hidden Single)
  40. Skyscraper: 2 in r4c7,r6c3 (connected by r8c37) => r6c8<>2
  41. Row 6 / Column 8 → 3 (Naked Single)
  42. Row 4 / Column 7 → 2 (Full House)
  43. Row 4 / Column 6 → 3 (Full House)
  44. Row 1 / Column 8 → 9 (Naked Single)
  45. Row 1 / Column 7 → 3 (Full House)
  46. Row 8 / Column 7 → 9 (Full House)
  47. Row 8 / Column 3 → 2 (Full House)
  48. Row 6 / Column 3 → 9 (Full House)
  49. Row 6 / Column 2 → 2 (Full House)
  50. Row 5 / Column 2 → 3 (Full House)
  51. Row 3 / Column 6 → 6 (Naked Single)
  52. Row 3 / Column 4 → 3 (Full House)
  53. Row 5 / Column 4 → 6 (Full House)
  54. Row 5 / Column 6 → 2 (Full House)
  55. Row 9 / Column 8 → 1 (Naked Single)
  56. Row 7 / Column 8 → 2 (Full House)
  57. Row 7 / Column 2 → 1 (Full House)
  58. Row 9 / Column 2 → 9 (Full House)
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