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

This Sudoku Puzzle has 58 steps and it is solved using Locked Pair, Locked Candidates Type 1 (Pointing), Naked Pair, Continuous Nice Loop, Hidden Single, Naked Single, Full House techniques.

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

Solution Steps:

  1. Locked Pair: 7,9 in r78c4 => r5c4,r7c5<>9, r79c5<>7
  2. Locked Candidates Type 1 (Pointing): 5 in b9 => r8c6<>5
  3. Naked Pair: 1,8 in r7c5,r8c6 => r9c56<>1
  4. Naked Pair: 2,6 in r3c14 => r3c3<>2, r3c35<>6
  5. Continuous Nice Loop: 1/4/6/8 9= r1c2 =2= r6c2 =1= r5c3 =5= r5c7 =9= r2c7 -9- r1c8 =9= r1c2 =2 => r5c7<>1, r5c7<>4, r5c3,r6c2<>6, r16c2,r5c37<>8
  6. Row 6 / Column 7 → 4 (Hidden Single)
  7. Row 4 / Column 2 → 8 (Hidden Single)
  8. Row 4 / Column 1 → 4 (Hidden Single)
  9. Row 2 / Column 1 → 5 (Hidden Single)
  10. Row 2 / Column 6 → 1 (Naked Single)
  11. Row 2 / Column 5 → 6 (Naked Single)
  12. Row 3 / Column 5 → 3 (Naked Single)
  13. Row 8 / Column 6 → 8 (Naked Single)
  14. Row 3 / Column 4 → 2 (Naked Single)
  15. Row 5 / Column 6 → 4 (Naked Single)
  16. Row 9 / Column 6 → 5 (Full House)
  17. Row 7 / Column 5 → 1 (Naked Single)
  18. Row 1 / Column 4 → 4 (Naked Single)
  19. Row 1 / Column 5 → 5 (Full House)
  20. Row 3 / Column 1 → 6 (Naked Single)
  21. Row 5 / Column 4 → 6 (Naked Single)
  22. Row 9 / Column 5 → 4 (Naked Single)
  23. Row 6 / Column 1 → 2 (Naked Single)
  24. Row 6 / Column 2 → 1 (Naked Single)
  25. Row 5 / Column 3 → 5 (Naked Single)
  26. Row 4 / Column 3 → 6 (Full House)
  27. Row 5 / Column 7 → 9 (Naked Single)
  28. Row 2 / Column 7 → 7 (Naked Single)
  29. Row 2 / Column 2 → 9 (Full House)
  30. Row 4 / Column 8 → 7 (Naked Single)
  31. Row 5 / Column 5 → 8 (Naked Single)
  32. Row 5 / Column 8 → 1 (Full House)
  33. Row 7 / Column 7 → 8 (Naked Single)
  34. Row 1 / Column 2 → 2 (Naked Single)
  35. Row 4 / Column 5 → 9 (Naked Single)
  36. Row 4 / Column 9 → 5 (Full House)
  37. Row 6 / Column 5 → 7 (Full House)
  38. Row 9 / Column 8 → 6 (Naked Single)
  39. Row 3 / Column 7 → 1 (Naked Single)
  40. Row 8 / Column 7 → 5 (Full House)
  41. Row 1 / Column 3 → 8 (Naked Single)
  42. Row 3 / Column 3 → 7 (Full House)
  43. Row 3 / Column 9 → 8 (Full House)
  44. Row 6 / Column 8 → 8 (Naked Single)
  45. Row 6 / Column 9 → 6 (Full House)
  46. Row 8 / Column 8 → 3 (Naked Single)
  47. Row 1 / Column 8 → 9 (Full House)
  48. Row 1 / Column 9 → 3 (Full House)
  49. Row 9 / Column 2 → 7 (Naked Single)
  50. Row 9 / Column 3 → 1 (Full House)
  51. Row 7 / Column 3 → 2 (Full House)
  52. Row 8 / Column 2 → 6 (Full House)
  53. Row 7 / Column 9 → 7 (Naked Single)
  54. Row 8 / Column 9 → 1 (Full House)
  55. Row 8 / Column 1 → 9 (Naked Single)
  56. Row 7 / Column 1 → 3 (Full House)
  57. Row 7 / Column 4 → 9 (Full House)
  58. Row 8 / Column 4 → 7 (Full House)
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