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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Naked Pair, Skyscraper, Full House techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 3 / Column 2 → 9 (Hidden Single)
  2. Row 2 / Column 7 → 5 (Hidden Single)
  3. Row 9 / Column 9 → 9 (Hidden Single)
  4. Row 8 / Column 5 → 9 (Hidden Single)
  5. Row 3 / Column 7 → 1 (Hidden Single)
  6. Row 2 / Column 9 → 8 (Hidden Single)
  7. Row 3 / Column 8 → 2 (Hidden Single)
  8. Locked Candidates Type 1 (Pointing): 3 in b3 => r1c6<>3
  9. Locked Candidates Type 1 (Pointing): 7 in b3 => r1c246<>7
  10. Row 2 / Column 1 → 7 (Hidden Single)
  11. Locked Candidates Type 1 (Pointing): 3 in b1 => r8c3<>3
  12. Locked Candidates Type 1 (Pointing): 2 in b9 => r8c46<>2
  13. Locked Candidates Type 2 (Claiming): 1 in c4 => r7c56,r9c6<>1
  14. Row 7 / Column 5 → 3 (Naked Single)
  15. Row 2 / Column 5 → 1 (Naked Single)
  16. Row 6 / Column 6 → 1 (Hidden Single)
  17. Row 4 / Column 1 → 1 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 2 in b5 => r5c1<>2
  19. Row 6 / Column 1 → 2 (Hidden Single)
  20. Locked Candidates Type 1 (Pointing): 8 in b5 => r5c28<>8
  21. Locked Candidates Type 1 (Pointing): 8 in b6 => r89c7<>8
  22. Row 9 / Column 7 → 7 (Naked Single)
  23. Locked Candidates Type 2 (Claiming): 4 in c5 => r5c46<>4
  24. Locked Candidates Type 2 (Claiming): 5 in c5 => r5c46<>5
  25. Locked Candidates Type 2 (Claiming): 7 in c5 => r5c46<>7
  26. Naked Pair: 2,8 in r57c6 => r89c6<>8
  27. Skyscraper: 6 in r5c1,r6c7 (connected by r8c17) => r5c8,r6c23<>6
  28. Row 5 / Column 8 → 7 (Naked Single)
  29. Row 1 / Column 8 → 3 (Naked Single)
  30. Row 1 / Column 9 → 7 (Full House)
  31. Row 6 / Column 9 → 4 (Naked Single)
  32. Row 9 / Column 8 → 8 (Naked Single)
  33. Row 7 / Column 8 → 6 (Full House)
  34. Row 4 / Column 9 → 2 (Naked Single)
  35. Row 8 / Column 9 → 3 (Full House)
  36. Row 8 / Column 7 → 2 (Full House)
  37. Row 4 / Column 7 → 8 (Naked Single)
  38. Row 6 / Column 7 → 6 (Full House)
  39. Row 4 / Column 3 → 4 (Naked Single)
  40. Row 4 / Column 5 → 7 (Full House)
  41. Row 3 / Column 3 → 3 (Naked Single)
  42. Row 5 / Column 1 → 6 (Naked Single)
  43. Row 6 / Column 5 → 5 (Naked Single)
  44. Row 5 / Column 5 → 4 (Full House)
  45. Row 2 / Column 3 → 6 (Naked Single)
  46. Row 1 / Column 2 → 4 (Full House)
  47. Row 2 / Column 6 → 3 (Full House)
  48. Row 5 / Column 2 → 5 (Naked Single)
  49. Row 8 / Column 1 → 4 (Naked Single)
  50. Row 9 / Column 1 → 3 (Full House)
  51. Row 6 / Column 3 → 8 (Naked Single)
  52. Row 6 / Column 2 → 7 (Full House)
  53. Row 8 / Column 3 → 5 (Full House)
  54. Row 1 / Column 4 → 5 (Naked Single)
  55. Row 1 / Column 6 → 6 (Full House)
  56. Row 9 / Column 2 → 1 (Naked Single)
  57. Row 8 / Column 6 → 7 (Naked Single)
  58. Row 7 / Column 2 → 8 (Naked Single)
  59. Row 8 / Column 2 → 6 (Full House)
  60. Row 8 / Column 4 → 8 (Full House)
  61. Row 9 / Column 4 → 4 (Naked Single)
  62. Row 9 / Column 6 → 5 (Full House)
  63. Row 3 / Column 6 → 4 (Naked Single)
  64. Row 3 / Column 4 → 7 (Full House)
  65. Row 7 / Column 6 → 2 (Naked Single)
  66. Row 5 / Column 6 → 8 (Full House)
  67. Row 5 / Column 4 → 2 (Full House)
  68. Row 7 / Column 4 → 1 (Full House)
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