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

This Sudoku Puzzle has 54 steps and it is solved using Naked Single, Full House, Hidden Single, Naked Pair, Naked Triple, Bivalue Universal Grave + 1 techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 7 → 7 (Naked Single)
  2. Row 7 / Column 8 → 3 (Naked Single)
  3. Row 7 / Column 1 → 1 (Naked Single)
  4. Row 7 / Column 6 → 4 (Naked Single)
  5. Row 8 / Column 1 → 3 (Naked Single)
  6. Row 8 / Column 3 → 6 (Full House)
  7. Row 7 / Column 9 → 5 (Naked Single)
  8. Row 7 / Column 5 → 6 (Full House)
  9. Row 2 / Column 1 → 9 (Naked Single)
  10. Row 9 / Column 9 → 8 (Naked Single)
  11. Row 4 / Column 3 → 1 (Hidden Single)
  12. Row 5 / Column 1 → 8 (Hidden Single)
  13. Row 2 / Column 2 → 6 (Hidden Single)
  14. Row 3 / Column 4 → 9 (Hidden Single)
  15. Row 4 / Column 7 → 8 (Hidden Single)
  16. Row 5 / Column 7 → 5 (Hidden Single)
  17. Row 6 / Column 1 → 5 (Hidden Single)
  18. Row 2 / Column 3 → 3 (Hidden Single)
  19. Row 3 / Column 2 → 2 (Hidden Single)
  20. Row 3 / Column 9 → 1 (Naked Single)
  21. Row 2 / Column 9 → 2 (Full House)
  22. Row 2 / Column 6 → 8 (Naked Single)
  23. Row 8 / Column 6 → 2 (Naked Single)
  24. Row 8 / Column 4 → 1 (Naked Single)
  25. Row 2 / Column 4 → 5 (Naked Single)
  26. Row 2 / Column 5 → 1 (Full House)
  27. Row 8 / Column 5 → 8 (Naked Single)
  28. Row 9 / Column 4 → 3 (Naked Single)
  29. Row 9 / Column 5 → 5 (Full House)
  30. Row 4 / Column 4 → 4 (Naked Single)
  31. Row 1 / Column 4 → 2 (Full House)
  32. Naked Pair: 3,7 in r4c5,r6c6 => r56c5<>3, r56c5<>7
  33. Naked Triple: 2,7,9 in r5c358 => r5c9<>7
  34. Bivalue Universal Grave + 1 => r1c5<>3, r1c5<>4
  35. Row 1 / Column 5 → 7 (Naked Single)
  36. Row 1 / Column 1 → 4 (Naked Single)
  37. Row 1 / Column 6 → 3 (Full House)
  38. Row 3 / Column 5 → 4 (Full House)
  39. Row 3 / Column 1 → 7 (Full House)
  40. Row 6 / Column 6 → 7 (Full House)
  41. Row 4 / Column 5 → 3 (Naked Single)
  42. Row 4 / Column 9 → 7 (Full House)
  43. Row 6 / Column 3 → 2 (Naked Single)
  44. Row 5 / Column 3 → 7 (Full House)
  45. Row 5 / Column 8 → 9 (Naked Single)
  46. Row 8 / Column 8 → 7 (Full House)
  47. Row 8 / Column 9 → 4 (Naked Single)
  48. Row 5 / Column 9 → 3 (Full House)
  49. Row 6 / Column 7 → 4 (Full House)
  50. Row 8 / Column 7 → 9 (Full House)
  51. Row 6 / Column 5 → 9 (Naked Single)
  52. Row 5 / Column 5 → 2 (Full House)
  53. Row 5 / Column 2 → 4 (Full House)
  54. Row 6 / Column 2 → 3 (Full House)
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