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

This Sudoku Puzzle has 55 steps and it is solved using Naked Single, Full House, Hidden Single, Naked Triple, Locked Candidates Type 1 (Pointing), undefined techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 8 / Column 2 → 2 (Naked Single)
  2. Row 6 / Column 8 → 7 (Naked Single)
  3. Row 9 / Column 2 → 5 (Naked Single)
  4. Row 4 / Column 8 → 8 (Naked Single)
  5. Row 4 / Column 9 → 1 (Naked Single)
  6. Row 4 / Column 2 → 6 (Naked Single)
  7. Row 6 / Column 2 → 1 (Full House)
  8. Row 6 / Column 6 → 3 (Naked Single)
  9. Row 6 / Column 4 → 6 (Full House)
  10. Row 9 / Column 6 → 2 (Hidden Single)
  11. Row 7 / Column 5 → 5 (Hidden Single)
  12. Row 5 / Column 5 → 8 (Naked Single)
  13. Row 5 / Column 6 → 1 (Hidden Single)
  14. Row 9 / Column 5 → 9 (Hidden Single)
  15. Row 1 / Column 6 → 9 (Hidden Single)
  16. Row 3 / Column 1 → 9 (Hidden Single)
  17. Row 1 / Column 4 → 8 (Hidden Single)
  18. Row 8 / Column 6 → 8 (Hidden Single)
  19. Row 2 / Column 4 → 1 (Hidden Single)
  20. Row 4 / Column 4 → 5 (Hidden Single)
  21. Row 4 / Column 6 → 7 (Full House)
  22. Row 2 / Column 6 → 5 (Full House)
  23. Row 3 / Column 8 → 5 (Hidden Single)
  24. Naked Triple: 2,3,7 in r13c9,r2c8 => r1c7<>2, r13c7<>7
  25. Locked Candidates Type 1 (Pointing): 7 in b3 => r79c9<>7
  26. W-Wing: 7/2 in r2c3,r7c7 connected by 2 in r27c8 => r7c3<>7
  27. Locked Candidates Type 1 (Pointing): 7 in b7 => r1c1<>7
  28. XY-Wing: 2/3/7 in r1c9,r2c58 => r1c5<>7
  29. Row 1 / Column 5 → 6 (Naked Single)
  30. Row 1 / Column 7 → 1 (Naked Single)
  31. Row 1 / Column 1 → 5 (Naked Single)
  32. Row 3 / Column 7 → 6 (Naked Single)
  33. Row 5 / Column 1 → 3 (Naked Single)
  34. Row 5 / Column 3 → 5 (Full House)
  35. Row 8 / Column 1 → 7 (Naked Single)
  36. Row 8 / Column 4 → 3 (Full House)
  37. Row 9 / Column 4 → 7 (Full House)
  38. Row 9 / Column 1 → 8 (Naked Single)
  39. Row 7 / Column 1 → 1 (Full House)
  40. Row 7 / Column 3 → 3 (Full House)
  41. Row 9 / Column 7 → 4 (Naked Single)
  42. Row 9 / Column 9 → 3 (Full House)
  43. Row 7 / Column 8 → 2 (Naked Single)
  44. Row 2 / Column 8 → 3 (Full House)
  45. Row 5 / Column 7 → 2 (Naked Single)
  46. Row 7 / Column 7 → 7 (Full House)
  47. Row 7 / Column 9 → 8 (Full House)
  48. Row 5 / Column 9 → 4 (Full House)
  49. Row 3 / Column 9 → 7 (Naked Single)
  50. Row 1 / Column 9 → 2 (Full House)
  51. Row 1 / Column 3 → 7 (Full House)
  52. Row 2 / Column 5 → 7 (Naked Single)
  53. Row 3 / Column 5 → 3 (Full House)
  54. Row 3 / Column 3 → 1 (Full House)
  55. Row 2 / Column 3 → 2 (Full House)
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