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

This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Naked Single, Full House, Hidden Triple, Locked Candidates Type 1 (Pointing), Skyscraper techniques.

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

Solution Steps:

  1. Row 3 / Column 8 → 9 (Hidden Single)
  2. Row 9 / Column 7 → 4 (Hidden Single)
  3. Row 5 / Column 8 → 1 (Hidden Single)
  4. Row 7 / Column 6 → 9 (Hidden Single)
  5. Row 3 / Column 6 → 8 (Hidden Single)
  6. Row 8 / Column 7 → 9 (Hidden Single)
  7. Row 4 / Column 5 → 9 (Hidden Single)
  8. Row 9 / Column 3 → 9 (Hidden Single)
  9. Row 3 / Column 5 → 2 (Hidden Single)
  10. Row 5 / Column 4 → 4 (Hidden Single)
  11. Row 9 / Column 8 → 8 (Hidden Single)
  12. Row 7 / Column 1 → 8 (Hidden Single)
  13. Row 9 / Column 6 → 2 (Hidden Single)
  14. Row 9 / Column 2 → 7 (Naked Single)
  15. Row 8 / Column 3 → 1 (Naked Single)
  16. Row 8 / Column 1 → 2 (Naked Single)
  17. Row 7 / Column 2 → 4 (Full House)
  18. Row 1 / Column 7 → 8 (Hidden Single)
  19. Row 8 / Column 5 → 7 (Hidden Single)
  20. Row 5 / Column 2 → 2 (Hidden Single)
  21. Row 1 / Column 5 → 4 (Hidden Single)
  22. Row 7 / Column 4 → 3 (Hidden Single)
  23. Row 3 / Column 2 → 3 (Hidden Single)
  24. Hidden Triple: 1,4,7 in r2c136 => r2c16<>5, r2c13<>6, r2c6<>3
  25. Locked Candidates Type 1 (Pointing): 6 in b1 => r3c4<>6
  26. Skyscraper: 1 in r2c6,r6c4 (connected by r26c1) => r1c4,r4c6<>1
  27. Row 6 / Column 4 → 1 (Hidden Single)
  28. Row 3 / Column 4 → 7 (Hidden Single)
  29. Row 2 / Column 6 → 1 (Naked Single)
  30. Row 3 / Column 3 → 6 (Naked Single)
  31. Row 3 / Column 1 → 5 (Full House)
  32. Row 1 / Column 2 → 1 (Naked Single)
  33. Row 4 / Column 2 → 5 (Full House)
  34. Row 6 / Column 1 → 7 (Naked Single)
  35. Row 4 / Column 6 → 3 (Naked Single)
  36. Row 2 / Column 1 → 4 (Naked Single)
  37. Row 2 / Column 3 → 7 (Full House)
  38. Row 5 / Column 1 → 6 (Naked Single)
  39. Row 4 / Column 1 → 1 (Full House)
  40. Row 6 / Column 3 → 8 (Naked Single)
  41. Row 4 / Column 3 → 4 (Full House)
  42. Row 1 / Column 6 → 5 (Naked Single)
  43. Row 5 / Column 6 → 7 (Full House)
  44. Row 6 / Column 5 → 5 (Full House)
  45. Row 5 / Column 7 → 5 (Full House)
  46. Row 4 / Column 7 → 6 (Naked Single)
  47. Row 4 / Column 9 → 8 (Full House)
  48. Row 1 / Column 4 → 6 (Naked Single)
  49. Row 1 / Column 8 → 3 (Full House)
  50. Row 2 / Column 5 → 3 (Full House)
  51. Row 9 / Column 5 → 6 (Full House)
  52. Row 9 / Column 4 → 5 (Full House)
  53. Row 2 / Column 7 → 2 (Naked Single)
  54. Row 6 / Column 7 → 3 (Full House)
  55. Row 6 / Column 9 → 2 (Full House)
  56. Row 8 / Column 8 → 5 (Naked Single)
  57. Row 8 / Column 9 → 3 (Full House)
  58. Row 7 / Column 9 → 6 (Naked Single)
  59. Row 2 / Column 9 → 5 (Full House)
  60. Row 2 / Column 8 → 6 (Full House)
  61. Row 7 / Column 8 → 2 (Full House)
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