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

This Sudoku Puzzle has 61 steps and it is solved using Naked Single, Full House, Hidden Single, Hidden Pair, Swordfish, Naked Pair, Naked Triple, Locked Candidates Type 1 (Pointing) 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 5 / Column 4 → 3 (Naked Single)
  2. Row 4 / Column 6 → 6 (Naked Single)
  3. Row 8 / Column 5 → 9 (Naked Single)
  4. Row 5 / Column 1 → 2 (Naked Single)
  5. Row 2 / Column 6 → 2 (Naked Single)
  6. Row 7 / Column 5 → 6 (Naked Single)
  7. Row 8 / Column 4 → 4 (Naked Single)
  8. Row 8 / Column 6 → 1 (Full House)
  9. Row 5 / Column 6 → 7 (Naked Single)
  10. Row 5 / Column 9 → 8 (Full House)
  11. Row 6 / Column 6 → 4 (Full House)
  12. Row 6 / Column 4 → 5 (Naked Single)
  13. Row 4 / Column 9 → 1 (Naked Single)
  14. Row 2 / Column 4 → 6 (Naked Single)
  15. Row 4 / Column 4 → 9 (Full House)
  16. Row 4 / Column 5 → 8 (Naked Single)
  17. Row 6 / Column 5 → 2 (Full House)
  18. Row 6 / Column 1 → 1 (Naked Single)
  19. Row 6 / Column 9 → 7 (Naked Single)
  20. Row 6 / Column 8 → 6 (Full House)
  21. Row 1 / Column 9 → 2 (Hidden Single)
  22. Row 8 / Column 3 → 2 (Hidden Single)
  23. Row 2 / Column 9 → 9 (Hidden Single)
  24. Row 7 / Column 1 → 9 (Hidden Single)
  25. Hidden Pair: 4,8 in r2c2,r3c1 => r2c2<>1, r2c2,r3c1<>3, r2c2,r3c1<>5, r3c1<>6
  26. Swordfish: 3 r148 c128 => r239c8,r9c12<>3
  27. Swordfish: 5 r148 c128 => r23c8,r7c2<>5
  28. Naked Pair: 1,8 in r29c8 => r1c8<>1, r38c8<>8
  29. Row 3 / Column 8 → 7 (Naked Single)
  30. Naked Triple: 3,4,5 in r79c9,r8c8 => r7c7<>4
  31. Locked Candidates Type 1 (Pointing): 4 in b9 => r3c9<>4
  32. Naked Pair: 3,5 in r3c59 => r3c3<>3, r3c3<>5
  33. Row 3 / Column 3 → 6 (Naked Single)
  34. Row 1 / Column 7 → 6 (Hidden Single)
  35. Row 9 / Column 1 → 6 (Hidden Single)
  36. Row 1 / Column 2 → 1 (Hidden Single)
  37. Row 3 / Column 1 → 4 (Hidden Single)
  38. Row 2 / Column 2 → 8 (Naked Single)
  39. Row 3 / Column 7 → 8 (Naked Single)
  40. Row 2 / Column 8 → 1 (Naked Single)
  41. Row 9 / Column 2 → 4 (Naked Single)
  42. Row 8 / Column 7 → 7 (Naked Single)
  43. Row 2 / Column 7 → 4 (Naked Single)
  44. Row 7 / Column 7 → 1 (Full House)
  45. Row 9 / Column 8 → 8 (Naked Single)
  46. Row 7 / Column 2 → 7 (Naked Single)
  47. Row 9 / Column 9 → 3 (Naked Single)
  48. Row 9 / Column 3 → 1 (Full House)
  49. Row 7 / Column 3 → 5 (Naked Single)
  50. Row 2 / Column 3 → 3 (Full House)
  51. Row 7 / Column 9 → 4 (Full House)
  52. Row 3 / Column 9 → 5 (Full House)
  53. Row 8 / Column 8 → 5 (Full House)
  54. Row 1 / Column 1 → 5 (Full House)
  55. Row 2 / Column 5 → 5 (Full House)
  56. Row 1 / Column 8 → 3 (Full House)
  57. Row 3 / Column 5 → 3 (Full House)
  58. Row 8 / Column 2 → 3 (Naked Single)
  59. Row 4 / Column 2 → 5 (Full House)
  60. Row 4 / Column 1 → 3 (Full House)
  61. Row 8 / Column 1 → 8 (Full House)
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