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

This Sudoku Puzzle has 53 steps and it is solved using Naked Single, Hidden Single, Locked Pair, Full House techniques.

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

Solution Steps:

  1. Row 5 / Column 4 → 1 (Naked Single)
  2. Row 6 / Column 3 → 8 (Naked Single)
  3. Row 2 / Column 6 → 6 (Hidden Single)
  4. Row 7 / Column 9 → 8 (Hidden Single)
  5. Row 1 / Column 8 → 8 (Hidden Single)
  6. Locked Pair: 8,9 in r5c56 => r46c5,r5c18<>9
  7. Locked Pair: 1,2 in r9c78 => r8c79,r9c49<>2, r8c79,r9c69<>1
  8. Row 9 / Column 4 → 4 (Naked Single)
  9. Row 1 / Column 4 → 2 (Full House)
  10. Row 8 / Column 7 → 9 (Naked Single)
  11. Row 8 / Column 5 → 2 (Hidden Single)
  12. Row 1 / Column 6 → 4 (Hidden Single)
  13. Row 8 / Column 6 → 1 (Hidden Single)
  14. Row 1 / Column 5 → 5 (Hidden Single)
  15. Row 7 / Column 5 → 9 (Naked Single)
  16. Row 7 / Column 6 → 5 (Full House)
  17. Row 9 / Column 6 → 3 (Full House)
  18. Row 5 / Column 5 → 8 (Naked Single)
  19. Row 3 / Column 6 → 8 (Naked Single)
  20. Row 5 / Column 6 → 9 (Full House)
  21. Row 1 / Column 9 → 1 (Hidden Single)
  22. Row 2 / Column 7 → 2 (Naked Single)
  23. Row 9 / Column 7 → 1 (Full House)
  24. Row 3 / Column 9 → 3 (Naked Single)
  25. Row 2 / Column 9 → 9 (Full House)
  26. Row 9 / Column 8 → 2 (Naked Single)
  27. Row 3 / Column 5 → 1 (Naked Single)
  28. Row 2 / Column 5 → 3 (Full House)
  29. Row 3 / Column 3 → 2 (Full House)
  30. Row 6 / Column 9 → 4 (Naked Single)
  31. Row 5 / Column 8 → 3 (Naked Single)
  32. Row 2 / Column 2 → 8 (Naked Single)
  33. Row 4 / Column 3 → 3 (Naked Single)
  34. Row 4 / Column 9 → 2 (Naked Single)
  35. Row 6 / Column 5 → 6 (Naked Single)
  36. Row 4 / Column 5 → 4 (Full House)
  37. Row 4 / Column 8 → 9 (Naked Single)
  38. Row 4 / Column 1 → 6 (Full House)
  39. Row 6 / Column 8 → 1 (Full House)
  40. Row 6 / Column 1 → 9 (Full House)
  41. Row 5 / Column 3 → 5 (Naked Single)
  42. Row 5 / Column 1 → 2 (Full House)
  43. Row 2 / Column 1 → 4 (Naked Single)
  44. Row 2 / Column 3 → 1 (Full House)
  45. Row 8 / Column 3 → 4 (Full House)
  46. Row 9 / Column 2 → 6 (Naked Single)
  47. Row 1 / Column 1 → 3 (Naked Single)
  48. Row 1 / Column 2 → 9 (Full House)
  49. Row 8 / Column 2 → 3 (Full House)
  50. Row 9 / Column 9 → 5 (Naked Single)
  51. Row 8 / Column 9 → 6 (Full House)
  52. Row 8 / Column 1 → 5 (Full House)
  53. Row 9 / Column 1 → 8 (Full House)
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