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

This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Naked Pair, Bivalue Universal Grave + 1 techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 1 / Column 3 → 3 (Hidden Single)
  2. Row 5 / Column 3 → 5 (Hidden Single)
  3. Row 2 / Column 6 → 5 (Hidden Single)
  4. Row 1 / Column 1 → 4 (Hidden Single)
  5. Row 1 / Column 7 → 5 (Hidden Single)
  6. Row 4 / Column 3 → 4 (Hidden Single)
  7. Row 3 / Column 2 → 5 (Hidden Single)
  8. Row 7 / Column 8 → 5 (Hidden Single)
  9. Row 4 / Column 2 → 1 (Hidden Single)
  10. Row 9 / Column 3 → 2 (Hidden Single)
  11. Row 3 / Column 1 → 7 (Hidden Single)
  12. Row 9 / Column 1 → 6 (Naked Single)
  13. Row 7 / Column 1 → 9 (Naked Single)
  14. Row 7 / Column 3 → 1 (Naked Single)
  15. Row 2 / Column 2 → 8 (Hidden Single)
  16. Row 6 / Column 2 → 6 (Naked Single)
  17. Row 6 / Column 8 → 2 (Naked Single)
  18. Row 2 / Column 8 → 6 (Naked Single)
  19. Row 1 / Column 9 → 9 (Naked Single)
  20. Row 1 / Column 5 → 6 (Full House)
  21. Row 2 / Column 3 → 9 (Naked Single)
  22. Row 2 / Column 4 → 2 (Full House)
  23. Row 3 / Column 3 → 6 (Full House)
  24. Row 8 / Column 4 → 1 (Hidden Single)
  25. Row 4 / Column 7 → 9 (Hidden Single)
  26. Row 5 / Column 5 → 2 (Hidden Single)
  27. Row 5 / Column 1 → 8 (Naked Single)
  28. Row 4 / Column 1 → 2 (Full House)
  29. Row 5 / Column 8 → 1 (Hidden Single)
  30. Row 4 / Column 9 → 8 (Hidden Single)
  31. Locked Candidates Type 1 (Pointing): 3 in b5 => r7c4<>3
  32. Locked Candidates Type 1 (Pointing): 7 in b5 => r89c6<>7
  33. Row 9 / Column 6 → 8 (Naked Single)
  34. Row 6 / Column 6 → 9 (Naked Single)
  35. Row 6 / Column 4 → 8 (Full House)
  36. Row 3 / Column 4 → 9 (Naked Single)
  37. Row 3 / Column 5 → 8 (Full House)
  38. Row 7 / Column 7 → 8 (Hidden Single)
  39. Row 8 / Column 5 → 9 (Hidden Single)
  40. Locked Candidates Type 1 (Pointing): 6 in b6 => r5c46<>6
  41. Naked Pair: 3,7 in r7c25 => r7c9<>3
  42. Naked Pair: 3,7 in r8c28 => r8c7<>7, r8c9<>3
  43. Bivalue Universal Grave + 1 => r8c9<>2, r8c9<>4
  44. Row 8 / Column 9 → 6 (Naked Single)
  45. Row 5 / Column 9 → 3 (Naked Single)
  46. Row 7 / Column 9 → 4 (Naked Single)
  47. Row 8 / Column 6 → 4 (Naked Single)
  48. Row 8 / Column 7 → 2 (Naked Single)
  49. Row 4 / Column 8 → 7 (Naked Single)
  50. Row 5 / Column 7 → 6 (Full House)
  51. Row 8 / Column 8 → 3 (Full House)
  52. Row 8 / Column 2 → 7 (Full House)
  53. Row 7 / Column 2 → 3 (Full House)
  54. Row 5 / Column 4 → 4 (Naked Single)
  55. Row 5 / Column 6 → 7 (Full House)
  56. Row 4 / Column 6 → 6 (Full House)
  57. Row 4 / Column 4 → 3 (Full House)
  58. Row 7 / Column 4 → 6 (Full House)
  59. Row 7 / Column 5 → 7 (Full House)
  60. Row 9 / Column 5 → 3 (Full House)
  61. Row 9 / Column 9 → 1 (Naked Single)
  62. Row 3 / Column 9 → 2 (Full House)
  63. Row 3 / Column 7 → 1 (Full House)
  64. Row 9 / Column 7 → 7 (Full House)
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