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

This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Naked Pair, Hidden Pair techniques.

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

Solution Steps:

  1. Row 4 / Column 5 → 9 (Naked Single)
  2. Row 6 / Column 5 → 6 (Full House)
  3. Row 3 / Column 6 → 1 (Hidden Single)
  4. Row 8 / Column 2 → 7 (Hidden Single)
  5. Row 5 / Column 7 → 5 (Hidden Single)
  6. Row 1 / Column 8 → 3 (Hidden Single)
  7. Row 1 / Column 6 → 9 (Hidden Single)
  8. Row 8 / Column 7 → 3 (Hidden Single)
  9. Row 5 / Column 2 → 2 (Hidden Single)
  10. Row 9 / Column 6 → 7 (Hidden Single)
  11. Locked Candidates Type 1 (Pointing): 4 in b2 => r46c4<>4
  12. Locked Candidates Type 1 (Pointing): 9 in b4 => r79c3<>9
  13. Naked Pair: 4,7 in r2c38 => r2c19<>4
  14. Hidden Pair: 6,8 in r37c8 => r37c8<>4, r3c8<>7, r37c8<>9, r7c8<>1
  15. Row 9 / Column 9 → 1 (Hidden Single)
  16. Locked Candidates Type 1 (Pointing): 9 in b9 => r3c7<>9
  17. Row 3 / Column 9 → 9 (Hidden Single)
  18. Row 3 / Column 2 → 5 (Hidden Single)
  19. Row 2 / Column 1 → 2 (Naked Single)
  20. Row 2 / Column 9 → 5 (Naked Single)
  21. Locked Candidates Type 1 (Pointing): 6 in b1 => r79c3<>6
  22. Naked Pair: 4,8 in r18c1 => r47c1<>4, r479c1<>8
  23. Row 4 / Column 1 → 1 (Naked Single)
  24. Row 4 / Column 2 → 8 (Hidden Single)
  25. Row 6 / Column 8 → 1 (Hidden Single)
  26. Row 7 / Column 3 → 1 (Hidden Single)
  27. Row 4 / Column 4 → 3 (Hidden Single)
  28. Row 6 / Column 3 → 9 (Hidden Single)
  29. Row 5 / Column 3 → 4 (Naked Single)
  30. Row 5 / Column 8 → 9 (Full House)
  31. Row 6 / Column 2 → 3 (Full House)
  32. Row 2 / Column 3 → 7 (Naked Single)
  33. Row 2 / Column 8 → 4 (Full House)
  34. Row 9 / Column 2 → 6 (Naked Single)
  35. Row 7 / Column 2 → 4 (Full House)
  36. Row 4 / Column 8 → 7 (Naked Single)
  37. Row 9 / Column 7 → 9 (Naked Single)
  38. Row 8 / Column 1 → 8 (Naked Single)
  39. Row 8 / Column 9 → 4 (Full House)
  40. Row 7 / Column 7 → 6 (Naked Single)
  41. Row 7 / Column 8 → 8 (Full House)
  42. Row 3 / Column 8 → 6 (Full House)
  43. Row 9 / Column 1 → 5 (Naked Single)
  44. Row 1 / Column 1 → 4 (Naked Single)
  45. Row 7 / Column 1 → 9 (Full House)
  46. Row 9 / Column 3 → 3 (Full House)
  47. Row 9 / Column 4 → 8 (Full House)
  48. Row 6 / Column 9 → 2 (Naked Single)
  49. Row 1 / Column 9 → 8 (Full House)
  50. Row 4 / Column 7 → 4 (Full House)
  51. Row 4 / Column 6 → 2 (Full House)
  52. Row 3 / Column 7 → 7 (Naked Single)
  53. Row 1 / Column 7 → 2 (Full House)
  54. Row 3 / Column 3 → 8 (Naked Single)
  55. Row 1 / Column 3 → 6 (Full House)
  56. Row 1 / Column 4 → 7 (Full House)
  57. Row 3 / Column 4 → 4 (Full House)
  58. Row 6 / Column 4 → 5 (Naked Single)
  59. Row 6 / Column 6 → 4 (Full House)
  60. Row 7 / Column 6 → 5 (Full House)
  61. Row 7 / Column 4 → 2 (Full House)
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