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

This Sudoku Puzzle has 57 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming) techniques.

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

Solution Steps:

  1. Row 3 / Column 4 → 4 (Hidden Single)
  2. Row 6 / Column 6 → 4 (Hidden Single)
  3. Row 3 / Column 5 → 9 (Hidden Single)
  4. Row 8 / Column 4 → 3 (Hidden Single)
  5. Row 8 / Column 8 → 5 (Hidden Single)
  6. Row 8 / Column 3 → 1 (Naked Single)
  7. Row 8 / Column 1 → 7 (Naked Single)
  8. Row 8 / Column 6 → 2 (Full House)
  9. Row 9 / Column 5 → 8 (Naked Single)
  10. Row 7 / Column 5 → 7 (Naked Single)
  11. Row 3 / Column 8 → 8 (Hidden Single)
  12. Row 3 / Column 1 → 1 (Hidden Single)
  13. Row 1 / Column 4 → 8 (Hidden Single)
  14. Row 7 / Column 2 → 8 (Hidden Single)
  15. Row 5 / Column 6 → 8 (Hidden Single)
  16. Row 2 / Column 4 → 6 (Hidden Single)
  17. Row 2 / Column 6 → 5 (Naked Single)
  18. Row 1 / Column 5 → 2 (Full House)
  19. Row 5 / Column 5 → 5 (Full House)
  20. Row 2 / Column 2 → 3 (Naked Single)
  21. Row 3 / Column 3 → 6 (Naked Single)
  22. Row 1 / Column 3 → 5 (Full House)
  23. Row 3 / Column 9 → 3 (Full House)
  24. Row 6 / Column 2 → 7 (Naked Single)
  25. Row 9 / Column 2 → 5 (Hidden Single)
  26. Locked Candidates Type 1 (Pointing): 6 in b7 => r45c1<>6
  27. Locked Candidates Type 1 (Pointing): 3 in b9 => r6c7<>3
  28. Locked Candidates Type 2 (Claiming): 2 in r6 => r4c78,r5c89<>2
  29. Row 6 / Column 8 → 2 (Hidden Single)
  30. Row 6 / Column 9 → 9 (Naked Single)
  31. Row 2 / Column 9 → 2 (Naked Single)
  32. Row 2 / Column 7 → 9 (Full House)
  33. Row 6 / Column 7 → 8 (Naked Single)
  34. Row 6 / Column 3 → 3 (Full House)
  35. Row 5 / Column 1 → 2 (Naked Single)
  36. Row 9 / Column 3 → 4 (Naked Single)
  37. Row 4 / Column 3 → 8 (Full House)
  38. Row 4 / Column 1 → 4 (Naked Single)
  39. Row 5 / Column 4 → 7 (Naked Single)
  40. Row 4 / Column 4 → 2 (Full House)
  41. Row 9 / Column 9 → 1 (Naked Single)
  42. Row 5 / Column 9 → 6 (Naked Single)
  43. Row 7 / Column 7 → 3 (Naked Single)
  44. Row 7 / Column 9 → 4 (Naked Single)
  45. Row 1 / Column 9 → 7 (Full House)
  46. Row 9 / Column 7 → 2 (Full House)
  47. Row 9 / Column 6 → 6 (Naked Single)
  48. Row 7 / Column 6 → 1 (Full House)
  49. Row 7 / Column 1 → 6 (Full House)
  50. Row 9 / Column 1 → 3 (Full House)
  51. Row 4 / Column 8 → 1 (Naked Single)
  52. Row 5 / Column 2 → 1 (Naked Single)
  53. Row 4 / Column 2 → 6 (Full House)
  54. Row 4 / Column 7 → 7 (Full House)
  55. Row 1 / Column 7 → 1 (Full House)
  56. Row 1 / Column 8 → 6 (Full House)
  57. Row 5 / Column 8 → 3 (Full House)
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