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

This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined 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 4 / Column 7 → 1 (Naked Single)
  2. Row 4 / Column 9 → 6 (Naked Single)
  3. Row 4 / Column 6 → 5 (Hidden Single)
  4. Row 5 / Column 2 → 5 (Hidden Single)
  5. Row 9 / Column 4 → 5 (Hidden Single)
  6. Row 1 / Column 9 → 1 (Hidden Single)
  7. Row 3 / Column 1 → 5 (Hidden Single)
  8. Row 7 / Column 6 → 7 (Hidden Single)
  9. Row 2 / Column 8 → 5 (Hidden Single)
  10. Row 5 / Column 5 → 1 (Hidden Single)
  11. Row 6 / Column 1 → 1 (Hidden Single)
  12. Row 2 / Column 6 → 1 (Hidden Single)
  13. Row 7 / Column 4 → 1 (Hidden Single)
  14. Row 5 / Column 8 → 7 (Hidden Single)
  15. Row 3 / Column 2 → 1 (Hidden Single)
  16. Row 5 / Column 3 → 3 (Hidden Single)
  17. Row 4 / Column 1 → 7 (Naked Single)
  18. Row 4 / Column 5 → 3 (Full House)
  19. Row 6 / Column 8 → 3 (Hidden Single)
  20. Row 8 / Column 2 → 7 (Hidden Single)
  21. Row 6 / Column 9 → 9 (Hidden Single)
  22. Row 9 / Column 2 → 9 (Hidden Single)
  23. Locked Candidates Type 1 (Pointing): 2 in b7 => r1c1<>2
  24. Locked Candidates Type 1 (Pointing): 3 in b7 => r1c1<>3
  25. Locked Candidates Type 1 (Pointing): 9 in b9 => r13c8<>9
  26. Locked Candidates Type 2 (Claiming): 6 in r2 => r1c12,r3c3<>6
  27. Row 1 / Column 1 → 8 (Naked Single)
  28. Row 3 / Column 3 → 2 (Naked Single)
  29. Locked Candidates Type 2 (Claiming): 4 in r8 => r7c5<>4
  30. Locked Candidates Type 2 (Claiming): 6 in c1 => r7c2,r9c3<>6
  31. XY-Wing: 3/6/2 in r1c68,r2c4 => r1c4,r2c7<>2
  32. Row 2 / Column 7 → 4 (Naked Single)
  33. Row 2 / Column 3 → 6 (Naked Single)
  34. Row 2 / Column 2 → 3 (Naked Single)
  35. Row 1 / Column 2 → 4 (Full House)
  36. Row 2 / Column 4 → 2 (Full House)
  37. Row 6 / Column 3 → 8 (Naked Single)
  38. Row 6 / Column 2 → 6 (Full House)
  39. Row 7 / Column 2 → 8 (Full House)
  40. Row 9 / Column 3 → 4 (Full House)
  41. Row 9 / Column 9 → 8 (Naked Single)
  42. Row 5 / Column 9 → 2 (Naked Single)
  43. Row 5 / Column 7 → 8 (Full House)
  44. Row 7 / Column 9 → 4 (Full House)
  45. Row 3 / Column 7 → 9 (Naked Single)
  46. Row 1 / Column 7 → 2 (Full House)
  47. Row 3 / Column 4 → 7 (Naked Single)
  48. Row 1 / Column 8 → 6 (Naked Single)
  49. Row 3 / Column 8 → 8 (Full House)
  50. Row 3 / Column 5 → 6 (Full House)
  51. Row 6 / Column 4 → 4 (Naked Single)
  52. Row 6 / Column 5 → 7 (Full House)
  53. Row 1 / Column 6 → 3 (Naked Single)
  54. Row 1 / Column 4 → 9 (Full House)
  55. Row 9 / Column 6 → 6 (Full House)
  56. Row 8 / Column 4 → 3 (Full House)
  57. Row 9 / Column 1 → 3 (Full House)
  58. Row 7 / Column 5 → 9 (Naked Single)
  59. Row 8 / Column 5 → 4 (Full House)
  60. Row 8 / Column 1 → 2 (Naked Single)
  61. Row 7 / Column 1 → 6 (Full House)
  62. Row 7 / Column 8 → 2 (Full House)
  63. Row 8 / Column 8 → 9 (Full House)
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