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

This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 2 (Claiming), Naked Pair, Bivalue Universal Grave + 1 techniques.

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

Solution Steps:

  1. Row 3 / Column 3 → 3 (Hidden Single)
  2. Row 1 / Column 4 → 4 (Hidden Single)
  3. Row 9 / Column 3 → 4 (Hidden Single)
  4. Row 2 / Column 1 → 4 (Hidden Single)
  5. Row 4 / Column 1 → 1 (Hidden Single)
  6. Row 8 / Column 9 → 1 (Hidden Single)
  7. Row 5 / Column 8 → 1 (Hidden Single)
  8. Row 8 / Column 1 → 2 (Hidden Single)
  9. Row 5 / Column 2 → 2 (Hidden Single)
  10. Row 9 / Column 4 → 1 (Hidden Single)
  11. Row 5 / Column 7 → 8 (Hidden Single)
  12. Row 6 / Column 9 → 7 (Naked Single)
  13. Row 8 / Column 7 → 7 (Naked Single)
  14. Row 4 / Column 9 → 2 (Naked Single)
  15. Row 2 / Column 9 → 8 (Full House)
  16. Row 6 / Column 1 → 5 (Naked Single)
  17. Row 1 / Column 1 → 7 (Full House)
  18. Row 1 / Column 8 → 6 (Naked Single)
  19. Row 2 / Column 7 → 2 (Naked Single)
  20. Row 3 / Column 8 → 7 (Full House)
  21. Row 4 / Column 8 → 3 (Naked Single)
  22. Row 9 / Column 7 → 3 (Naked Single)
  23. Row 6 / Column 8 → 4 (Naked Single)
  24. Row 7 / Column 7 → 4 (Naked Single)
  25. Row 4 / Column 3 → 7 (Hidden Single)
  26. Row 1 / Column 6 → 8 (Hidden Single)
  27. Row 6 / Column 5 → 3 (Hidden Single)
  28. Row 7 / Column 6 → 3 (Hidden Single)
  29. Row 6 / Column 7 → 9 (Hidden Single)
  30. Row 4 / Column 7 → 6 (Full House)
  31. Locked Candidates Type 2 (Claiming): 5 in c4 => r78c5,r9c6<>5
  32. Naked Pair: 2,7 in r7c5,r9c6 => r7c4<>7
  33. Row 7 / Column 4 → 5 (Naked Single)
  34. Row 5 / Column 4 → 7 (Hidden Single)
  35. Row 5 / Column 6 → 6 (Full House)
  36. Naked Pair: 5,9 in r14c5 => r2c5<>5, r38c5<>9
  37. Row 8 / Column 5 → 6 (Naked Single)
  38. Row 8 / Column 4 → 9 (Naked Single)
  39. Row 3 / Column 4 → 6 (Full House)
  40. Bivalue Universal Grave + 1 => r2c2<>1, r2c2<>6
  41. Row 2 / Column 2 → 5 (Naked Single)
  42. Row 1 / Column 2 → 9 (Naked Single)
  43. Row 1 / Column 5 → 5 (Full House)
  44. Row 2 / Column 3 → 6 (Naked Single)
  45. Row 3 / Column 2 → 1 (Full House)
  46. Row 2 / Column 6 → 7 (Naked Single)
  47. Row 2 / Column 5 → 1 (Full House)
  48. Row 9 / Column 2 → 7 (Naked Single)
  49. Row 4 / Column 5 → 9 (Naked Single)
  50. Row 4 / Column 6 → 5 (Full House)
  51. Row 6 / Column 3 → 8 (Naked Single)
  52. Row 6 / Column 2 → 6 (Full House)
  53. Row 7 / Column 2 → 8 (Full House)
  54. Row 8 / Column 3 → 5 (Full House)
  55. Row 8 / Column 8 → 8 (Full House)
  56. Row 3 / Column 5 → 2 (Naked Single)
  57. Row 3 / Column 6 → 9 (Full House)
  58. Row 9 / Column 6 → 2 (Full House)
  59. Row 7 / Column 5 → 7 (Full House)
  60. Row 7 / Column 8 → 2 (Full House)
  61. Row 9 / Column 8 → 5 (Full House)
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