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.

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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