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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Locked Triple, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Uniqueness Test 2, Full House 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 4 / Column 8 → 8 (Hidden Single)
  2. Row 4 / Column 5 → 7 (Hidden Single)
  3. Row 2 / Column 2 → 5 (Hidden Single)
  4. Row 2 / Column 1 → 3 (Hidden Single)
  5. Row 4 / Column 2 → 3 (Hidden Single)
  6. Row 2 / Column 9 → 7 (Hidden Single)
  7. Row 2 / Column 4 → 8 (Hidden Single)
  8. Locked Pair: 1,9 in r8c46 => r789c5,r8c278,r9c46<>1, r789c5,r8c8,r9c46<>9
  9. Row 8 / Column 8 → 2 (Naked Single)
  10. Row 8 / Column 2 → 7 (Naked Single)
  11. Row 6 / Column 1 → 7 (Hidden Single)
  12. Row 9 / Column 7 → 7 (Hidden Single)
  13. Row 3 / Column 3 → 7 (Hidden Single)
  14. Locked Triple: 3,6,8 in r789c5 => r135c5,r9c46<>6
  15. Locked Candidates Type 1 (Pointing): 6 in b5 => r6c2<>6
  16. Locked Candidates Type 1 (Pointing): 9 in b6 => r6c46<>9
  17. Locked Candidates Type 1 (Pointing): 4 in b8 => r9c89<>4
  18. Locked Candidates Type 1 (Pointing): 5 in b8 => r9c89<>5
  19. Locked Candidates Type 2 (Claiming): 6 in c2 => r7c13,r9c13<>6
  20. Locked Candidates Type 2 (Claiming): 9 in c5 => r1c6,r3c4<>9
  21. Uniqueness Test 2: 1/9 in r4c46,r8c46 => r4c1,r6c46<>4
  22. Row 4 / Column 1 → 1 (Naked Single)
  23. Row 5 / Column 3 → 6 (Naked Single)
  24. Row 6 / Column 2 → 2 (Naked Single)
  25. Row 5 / Column 1 → 4 (Full House)
  26. Row 1 / Column 3 → 1 (Hidden Single)
  27. Row 5 / Column 5 → 2 (Hidden Single)
  28. Row 1 / Column 5 → 9 (Naked Single)
  29. Row 1 / Column 1 → 6 (Naked Single)
  30. Row 3 / Column 1 → 9 (Full House)
  31. Row 3 / Column 5 → 1 (Naked Single)
  32. Row 7 / Column 1 → 8 (Naked Single)
  33. Row 9 / Column 1 → 2 (Full House)
  34. Row 2 / Column 6 → 6 (Naked Single)
  35. Row 2 / Column 8 → 1 (Full House)
  36. Row 3 / Column 4 → 5 (Naked Single)
  37. Row 1 / Column 6 → 2 (Full House)
  38. Row 6 / Column 6 → 1 (Naked Single)
  39. Row 9 / Column 8 → 9 (Naked Single)
  40. Row 3 / Column 8 → 6 (Naked Single)
  41. Row 3 / Column 9 → 8 (Naked Single)
  42. Row 3 / Column 7 → 2 (Full House)
  43. Row 9 / Column 4 → 4 (Naked Single)
  44. Row 6 / Column 4 → 6 (Naked Single)
  45. Row 8 / Column 6 → 9 (Naked Single)
  46. Row 6 / Column 8 → 4 (Naked Single)
  47. Row 7 / Column 8 → 5 (Full House)
  48. Row 9 / Column 3 → 3 (Naked Single)
  49. Row 7 / Column 3 → 9 (Full House)
  50. Row 4 / Column 4 → 9 (Naked Single)
  51. Row 4 / Column 6 → 4 (Full House)
  52. Row 9 / Column 6 → 5 (Full House)
  53. Row 8 / Column 4 → 1 (Full House)
  54. Row 6 / Column 7 → 3 (Naked Single)
  55. Row 6 / Column 9 → 9 (Full House)
  56. Row 9 / Column 9 → 1 (Naked Single)
  57. Row 8 / Column 7 → 8 (Naked Single)
  58. Row 8 / Column 5 → 3 (Full House)
  59. Row 5 / Column 9 → 5 (Naked Single)
  60. Row 5 / Column 7 → 1 (Full House)
  61. Row 7 / Column 7 → 4 (Naked Single)
  62. Row 1 / Column 7 → 5 (Full House)
  63. Row 1 / Column 9 → 4 (Full House)
  64. Row 7 / Column 9 → 3 (Full House)
  65. Row 9 / Column 2 → 6 (Naked Single)
  66. Row 7 / Column 2 → 1 (Full House)
  67. Row 7 / Column 5 → 6 (Full House)
  68. Row 9 / Column 5 → 8 (Full House)
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