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

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

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

Solution Steps:

  1. Row 8 / Column 8 → 9 (Hidden Single)
  2. Row 3 / Column 7 → 9 (Hidden Single)
  3. Locked Candidates Type 1 (Pointing): 8 in b1 => r3c6<>8
  4. Locked Candidates Type 1 (Pointing): 1 in b5 => r5c2<>1
  5. Locked Candidates Type 1 (Pointing): 8 in b5 => r5c1<>8
  6. Locked Candidates Type 1 (Pointing): 2 in b9 => r7c1246<>2
  7. Locked Candidates Type 1 (Pointing): 2 in b7 => r9c46<>2
  8. Naked Triple: 1,3,5 in r7c2,r89c3 => r7c1<>3, r79c1,r9c2<>5, r9c2<>1
  9. Row 7 / Column 1 → 7 (Naked Single)
  10. Row 1 / Column 8 → 7 (Hidden Single)
  11. Row 8 / Column 9 → 7 (Hidden Single)
  12. Locked Candidates Type 1 (Pointing): 1 in b9 => r7c246<>1
  13. Row 4 / Column 2 → 1 (Hidden Single)
  14. Row 4 / Column 3 → 8 (Naked Single)
  15. Row 4 / Column 1 → 9 (Full House)
  16. Row 9 / Column 1 → 2 (Naked Single)
  17. Row 9 / Column 2 → 9 (Naked Single)
  18. Row 3 / Column 1 → 8 (Hidden Single)
  19. Locked Candidates Type 1 (Pointing): 5 in b9 => r7c26<>5
  20. Row 7 / Column 2 → 3 (Naked Single)
  21. Row 5 / Column 2 → 5 (Naked Single)
  22. Row 5 / Column 1 → 3 (Full House)
  23. Row 2 / Column 1 → 5 (Full House)
  24. Row 3 / Column 3 → 3 (Naked Single)
  25. Row 6 / Column 8 → 3 (Hidden Single)
  26. Row 6 / Column 9 → 1 (Full House)
  27. Row 7 / Column 9 → 5 (Naked Single)
  28. Row 3 / Column 9 → 4 (Naked Single)
  29. Row 1 / Column 9 → 3 (Full House)
  30. Row 3 / Column 2 → 2 (Naked Single)
  31. Row 2 / Column 2 → 4 (Full House)
  32. Row 3 / Column 8 → 1 (Naked Single)
  33. Row 3 / Column 6 → 5 (Full House)
  34. Row 7 / Column 8 → 2 (Full House)
  35. Row 7 / Column 7 → 1 (Full House)
  36. Row 2 / Column 7 → 2 (Naked Single)
  37. Row 1 / Column 7 → 5 (Full House)
  38. Row 1 / Column 5 → 8 (Naked Single)
  39. Row 5 / Column 5 → 1 (Naked Single)
  40. Row 2 / Column 5 → 3 (Naked Single)
  41. Row 2 / Column 6 → 1 (Full House)
  42. Row 8 / Column 5 → 5 (Full House)
  43. Row 9 / Column 6 → 7 (Naked Single)
  44. Row 8 / Column 3 → 1 (Naked Single)
  45. Row 9 / Column 3 → 5 (Full House)
  46. Row 9 / Column 4 → 1 (Full House)
  47. Row 5 / Column 6 → 8 (Naked Single)
  48. Row 5 / Column 4 → 7 (Full House)
  49. Row 8 / Column 4 → 2 (Naked Single)
  50. Row 8 / Column 6 → 3 (Full House)
  51. Row 7 / Column 6 → 4 (Naked Single)
  52. Row 1 / Column 6 → 2 (Full House)
  53. Row 1 / Column 4 → 4 (Full House)
  54. Row 7 / Column 4 → 8 (Full House)
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