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

This Sudoku Puzzle has 60 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Skyscraper techniques.

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

Solution Steps:

  1. Row 9 / Column 7 → 6 (Hidden Single)
  2. Row 7 / Column 4 → 3 (Hidden Single)
  3. Row 2 / Column 5 → 3 (Hidden Single)
  4. Row 8 / Column 3 → 3 (Hidden Single)
  5. Row 2 / Column 4 → 1 (Hidden Single)
  6. Row 2 / Column 3 → 6 (Hidden Single)
  7. Row 1 / Column 6 → 6 (Hidden Single)
  8. Row 5 / Column 2 → 6 (Hidden Single)
  9. Row 4 / Column 5 → 6 (Hidden Single)
  10. Row 3 / Column 6 → 4 (Hidden Single)
  11. Row 3 / Column 2 → 8 (Naked Single)
  12. Row 3 / Column 4 → 2 (Naked Single)
  13. Row 1 / Column 4 → 8 (Full House)
  14. Row 1 / Column 8 → 2 (Hidden Single)
  15. Row 1 / Column 1 → 3 (Hidden Single)
  16. Row 3 / Column 1 → 9 (Naked Single)
  17. Row 3 / Column 7 → 7 (Naked Single)
  18. Row 3 / Column 8 → 3 (Full House)
  19. Locked Candidates Type 1 (Pointing): 7 in b4 => r8c1<>7
  20. Locked Candidates Type 1 (Pointing): 1 in b9 => r45c8<>1
  21. Locked Candidates Type 2 (Claiming): 2 in r5 => r4c6,r6c5<>2
  22. Skyscraper: 4 in r1c9,r9c8 (connected by r19c2) => r2c8,r8c9<>4
  23. Row 9 / Column 8 → 4 (Hidden Single)
  24. Row 8 / Column 1 → 4 (Hidden Single)
  25. Row 2 / Column 1 → 5 (Naked Single)
  26. Row 1 / Column 2 → 4 (Full House)
  27. Row 1 / Column 9 → 5 (Full House)
  28. Row 2 / Column 8 → 8 (Naked Single)
  29. Row 7 / Column 8 → 1 (Hidden Single)
  30. Row 9 / Column 3 → 8 (Hidden Single)
  31. Row 7 / Column 2 → 7 (Hidden Single)
  32. Row 9 / Column 2 → 5 (Full House)
  33. Row 9 / Column 4 → 9 (Naked Single)
  34. Row 5 / Column 4 → 5 (Full House)
  35. Row 9 / Column 6 → 1 (Naked Single)
  36. Row 9 / Column 5 → 7 (Full House)
  37. Row 5 / Column 8 → 7 (Naked Single)
  38. Row 4 / Column 8 → 5 (Full House)
  39. Row 4 / Column 3 → 2 (Naked Single)
  40. Row 6 / Column 3 → 5 (Full House)
  41. Row 8 / Column 9 → 7 (Hidden Single)
  42. Row 4 / Column 1 → 7 (Hidden Single)
  43. Row 6 / Column 7 → 2 (Hidden Single)
  44. Row 4 / Column 9 → 1 (Hidden Single)
  45. Row 6 / Column 9 → 4 (Hidden Single)
  46. Row 2 / Column 9 → 9 (Naked Single)
  47. Row 2 / Column 7 → 4 (Full House)
  48. Row 5 / Column 9 → 8 (Full House)
  49. Row 4 / Column 7 → 9 (Full House)
  50. Row 4 / Column 6 → 8 (Full House)
  51. Row 5 / Column 1 → 1 (Naked Single)
  52. Row 6 / Column 1 → 8 (Full House)
  53. Row 6 / Column 5 → 1 (Full House)
  54. Row 7 / Column 6 → 5 (Naked Single)
  55. Row 7 / Column 7 → 8 (Full House)
  56. Row 8 / Column 7 → 5 (Full House)
  57. Row 5 / Column 5 → 2 (Naked Single)
  58. Row 5 / Column 6 → 9 (Full House)
  59. Row 8 / Column 6 → 2 (Full House)
  60. Row 8 / Column 5 → 8 (Full House)
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