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

This Sudoku Puzzle has 64 steps and it is solved using Hidden Single, Naked Triple, Locked Candidates Type 1 (Pointing), Skyscraper, Full House, Turbot Fish, Empty Rectangle, Naked Single techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 5 / Column 5 → 6 (Hidden Single)
  2. Row 4 / Column 3 → 7 (Hidden Single)
  3. Row 6 / Column 9 → 4 (Hidden Single)
  4. Row 9 / Column 8 → 9 (Hidden Single)
  5. Row 6 / Column 4 → 2 (Hidden Single)
  6. Row 4 / Column 2 → 4 (Hidden Single)
  7. Row 6 / Column 8 → 8 (Hidden Single)
  8. Row 7 / Column 3 → 9 (Hidden Single)
  9. Row 5 / Column 2 → 9 (Hidden Single)
  10. Row 8 / Column 4 → 8 (Hidden Single)
  11. Row 6 / Column 2 → 3 (Hidden Single)
  12. Row 2 / Column 5 → 8 (Hidden Single)
  13. Row 8 / Column 6 → 7 (Hidden Single)
  14. Row 2 / Column 2 → 2 (Hidden Single)
  15. Row 3 / Column 5 → 2 (Hidden Single)
  16. Row 2 / Column 6 → 4 (Hidden Single)
  17. Row 1 / Column 4 → 7 (Hidden Single)
  18. Naked Triple: 1,5,6 in r8c23,r9c2 => r79c1,r9c3<>1, r79c1,r9c3<>5, r79c1<>6
  19. Locked Candidates Type 1 (Pointing): 6 in b7 => r1c2<>6
  20. Skyscraper: 6 in r2c8,r7c7 (connected by r27c4) => r13c7,r8c8<>6
  21. Row 2 / Column 8 → 6 (Hidden Single)
  22. Row 2 / Column 4 → 5 (Full House)
  23. Row 8 / Column 2 → 6 (Hidden Single)
  24. Turbot Fish: 1 r5c7 =1= r4c8 -1- r8c8 =1= r8c3 => r5c3<>1
  25. Locked Candidates Type 1 (Pointing): 1 in b4 => r13c1<>1
  26. Empty Rectangle: 5 in b6 (r8c38) => r5c3<>5
  27. Row 5 / Column 3 → 2 (Naked Single)
  28. Row 9 / Column 3 → 4 (Naked Single)
  29. Row 7 / Column 1 → 7 (Naked Single)
  30. Row 7 / Column 9 → 5 (Naked Single)
  31. Row 9 / Column 1 → 2 (Naked Single)
  32. Row 5 / Column 9 → 3 (Naked Single)
  33. Row 8 / Column 8 → 1 (Naked Single)
  34. Row 4 / Column 8 → 5 (Full House)
  35. Row 8 / Column 3 → 5 (Full House)
  36. Row 5 / Column 7 → 1 (Full House)
  37. Row 9 / Column 2 → 1 (Full House)
  38. Row 5 / Column 1 → 5 (Full House)
  39. Row 1 / Column 2 → 5 (Full House)
  40. Row 6 / Column 1 → 1 (Full House)
  41. Row 6 / Column 6 → 5 (Full House)
  42. Row 7 / Column 7 → 6 (Naked Single)
  43. Row 3 / Column 1 → 6 (Naked Single)
  44. Row 1 / Column 1 → 4 (Full House)
  45. Row 7 / Column 4 → 1 (Naked Single)
  46. Row 7 / Column 5 → 4 (Full House)
  47. Row 9 / Column 7 → 8 (Naked Single)
  48. Row 9 / Column 9 → 7 (Full House)
  49. Row 1 / Column 7 → 3 (Naked Single)
  50. Row 3 / Column 7 → 5 (Full House)
  51. Row 1 / Column 5 → 1 (Naked Single)
  52. Row 1 / Column 3 → 8 (Naked Single)
  53. Row 3 / Column 3 → 1 (Full House)
  54. Row 4 / Column 5 → 3 (Naked Single)
  55. Row 9 / Column 5 → 5 (Full House)
  56. Row 1 / Column 9 → 9 (Naked Single)
  57. Row 1 / Column 6 → 6 (Full House)
  58. Row 3 / Column 9 → 8 (Full House)
  59. Row 4 / Column 4 → 9 (Naked Single)
  60. Row 4 / Column 6 → 1 (Full House)
  61. Row 9 / Column 6 → 3 (Naked Single)
  62. Row 3 / Column 6 → 9 (Full House)
  63. Row 3 / Column 4 → 3 (Full House)
  64. Row 9 / Column 4 → 6 (Full House)
Show More...