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

This Sudoku Puzzle has 54 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 2 (Claiming), Uniqueness Test 1 techniques.

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

Solution Steps:

  1. Row 7 / Column 5 → 7 (Naked Single)
  2. Row 7 / Column 4 → 8 (Naked Single)
  3. Row 7 / Column 6 → 6 (Naked Single)
  4. Row 7 / Column 3 → 1 (Naked Single)
  5. Row 7 / Column 2 → 3 (Naked Single)
  6. Row 7 / Column 8 → 4 (Full House)
  7. Row 3 / Column 6 → 8 (Hidden Single)
  8. Row 4 / Column 8 → 9 (Hidden Single)
  9. Row 3 / Column 8 → 3 (Hidden Single)
  10. Row 8 / Column 4 → 9 (Hidden Single)
  11. Row 8 / Column 6 → 5 (Naked Single)
  12. Row 9 / Column 5 → 2 (Full House)
  13. Row 8 / Column 1 → 7 (Naked Single)
  14. Row 4 / Column 1 → 1 (Naked Single)
  15. Row 8 / Column 3 → 6 (Naked Single)
  16. Row 8 / Column 7 → 8 (Full House)
  17. Row 9 / Column 3 → 5 (Full House)
  18. Row 4 / Column 4 → 7 (Naked Single)
  19. Row 6 / Column 1 → 5 (Naked Single)
  20. Row 2 / Column 1 → 3 (Full House)
  21. Row 5 / Column 3 → 8 (Hidden Single)
  22. Row 6 / Column 5 → 3 (Hidden Single)
  23. Row 3 / Column 3 → 9 (Hidden Single)
  24. Row 1 / Column 6 → 9 (Hidden Single)
  25. Row 1 / Column 8 → 5 (Hidden Single)
  26. Row 1 / Column 5 → 4 (Naked Single)
  27. Row 3 / Column 5 → 5 (Full House)
  28. Row 2 / Column 4 → 1 (Naked Single)
  29. Row 2 / Column 6 → 7 (Full House)
  30. Row 5 / Column 4 → 5 (Full House)
  31. Row 2 / Column 7 → 2 (Naked Single)
  32. Row 2 / Column 2 → 5 (Full House)
  33. Locked Candidates Type 2 (Claiming): 1 in c8 => r5c9,r6c7<>1
  34. Locked Candidates Type 2 (Claiming): 7 in c8 => r5c9,r6c7<>7
  35. Row 6 / Column 7 → 4 (Naked Single)
  36. Row 3 / Column 9 → 4 (Hidden Single)
  37. Row 4 / Column 6 → 4 (Hidden Single)
  38. Uniqueness Test 1: 2/6 in r4c29,r5c29 => r5c2<>2, r5c2<>6
  39. Row 5 / Column 2 → 7 (Naked Single)
  40. Row 3 / Column 2 → 1 (Naked Single)
  41. Row 3 / Column 7 → 7 (Full House)
  42. Row 1 / Column 9 → 1 (Full House)
  43. Row 9 / Column 7 → 1 (Full House)
  44. Row 9 / Column 9 → 7 (Full House)
  45. Row 5 / Column 8 → 1 (Naked Single)
  46. Row 6 / Column 8 → 7 (Full House)
  47. Row 6 / Column 3 → 2 (Naked Single)
  48. Row 1 / Column 3 → 7 (Full House)
  49. Row 1 / Column 2 → 2 (Full House)
  50. Row 4 / Column 2 → 6 (Full House)
  51. Row 6 / Column 6 → 1 (Full House)
  52. Row 5 / Column 6 → 2 (Full House)
  53. Row 4 / Column 9 → 2 (Full House)
  54. Row 5 / Column 9 → 6 (Full House)
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