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

This Sudoku Puzzle has 64 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Skyscraper techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 1 → 6 (Naked Single)
  2. Row 2 / Column 3 → 5 (Naked Single)
  3. Row 2 / Column 9 → 2 (Naked Single)
  4. Row 2 / Column 6 → 8 (Naked Single)
  5. Row 2 / Column 7 → 4 (Full House)
  6. Row 7 / Column 4 → 5 (Hidden Single)
  7. Row 3 / Column 5 → 1 (Hidden Single)
  8. Row 5 / Column 7 → 8 (Hidden Single)
  9. Row 8 / Column 3 → 8 (Hidden Single)
  10. Row 3 / Column 8 → 8 (Hidden Single)
  11. Row 6 / Column 2 → 5 (Hidden Single)
  12. Row 1 / Column 9 → 5 (Hidden Single)
  13. Row 6 / Column 4 → 8 (Hidden Single)
  14. Row 4 / Column 5 → 5 (Hidden Single)
  15. Row 8 / Column 4 → 7 (Hidden Single)
  16. Row 8 / Column 5 → 4 (Hidden Single)
  17. Row 6 / Column 3 → 4 (Hidden Single)
  18. Row 9 / Column 2 → 4 (Hidden Single)
  19. Row 3 / Column 9 → 7 (Hidden Single)
  20. Row 7 / Column 7 → 7 (Hidden Single)
  21. Row 9 / Column 3 → 7 (Hidden Single)
  22. Row 4 / Column 1 → 7 (Hidden Single)
  23. Row 1 / Column 2 → 7 (Hidden Single)
  24. Row 8 / Column 9 → 1 (Hidden Single)
  25. Locked Candidates Type 1 (Pointing): 9 in b3 => r46c7<>9
  26. Locked Candidates Type 1 (Pointing): 6 in b4 => r5c5<>6
  27. Locked Candidates Type 1 (Pointing): 6 in b7 => r7c68<>6
  28. Locked Candidates Type 1 (Pointing): 3 in b8 => r46c6<>3
  29. Locked Candidates Type 2 (Claiming): 1 in r5 => r4c3,r6c1<>1
  30. Locked Candidates Type 2 (Claiming): 6 in c4 => r1c5<>6
  31. Naked Pair: 3,9 in r14c3 => r57c3<>3, r57c3<>9
  32. Skyscraper: 3 in r3c2,r4c3 (connected by r34c4) => r1c3,r5c2<>3
  33. Row 1 / Column 3 → 9 (Naked Single)
  34. Row 3 / Column 2 → 3 (Full House)
  35. Row 1 / Column 7 → 6 (Naked Single)
  36. Row 3 / Column 7 → 9 (Full House)
  37. Row 3 / Column 4 → 6 (Full House)
  38. Row 4 / Column 3 → 3 (Naked Single)
  39. Row 4 / Column 4 → 2 (Naked Single)
  40. Row 1 / Column 4 → 3 (Full House)
  41. Row 1 / Column 5 → 2 (Full House)
  42. Row 4 / Column 7 → 1 (Naked Single)
  43. Row 4 / Column 6 → 9 (Full House)
  44. Row 6 / Column 7 → 2 (Full House)
  45. Row 5 / Column 5 → 3 (Naked Single)
  46. Row 6 / Column 1 → 9 (Naked Single)
  47. Row 5 / Column 9 → 9 (Naked Single)
  48. Row 6 / Column 9 → 3 (Full House)
  49. Row 6 / Column 5 → 6 (Naked Single)
  50. Row 6 / Column 6 → 1 (Full House)
  51. Row 9 / Column 5 → 9 (Full House)
  52. Row 5 / Column 2 → 6 (Naked Single)
  53. Row 7 / Column 2 → 9 (Full House)
  54. Row 8 / Column 1 → 3 (Naked Single)
  55. Row 5 / Column 3 → 1 (Naked Single)
  56. Row 5 / Column 1 → 2 (Full House)
  57. Row 7 / Column 1 → 1 (Full House)
  58. Row 7 / Column 3 → 6 (Full House)
  59. Row 7 / Column 8 → 2 (Naked Single)
  60. Row 7 / Column 6 → 3 (Full House)
  61. Row 8 / Column 6 → 6 (Naked Single)
  62. Row 8 / Column 8 → 9 (Full House)
  63. Row 9 / Column 8 → 6 (Full House)
  64. Row 9 / Column 6 → 2 (Full House)
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