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

This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing) techniques.

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

Solution Steps:

  1. Row 3 / Column 9 → 2 (Naked Single)
  2. Row 3 / Column 7 → 1 (Naked Single)
  3. Row 2 / Column 7 → 7 (Naked Single)
  4. Row 2 / Column 8 → 9 (Full House)
  5. Row 3 / Column 5 → 6 (Hidden Single)
  6. Row 1 / Column 2 → 7 (Hidden Single)
  7. Row 9 / Column 2 → 6 (Hidden Single)
  8. Row 9 / Column 8 → 4 (Hidden Single)
  9. Row 6 / Column 8 → 2 (Naked Single)
  10. Row 8 / Column 8 → 1 (Hidden Single)
  11. Row 2 / Column 5 → 8 (Hidden Single)
  12. Row 1 / Column 1 → 2 (Hidden Single)
  13. Row 8 / Column 9 → 7 (Hidden Single)
  14. Locked Pair: 2,8 in r78c7 => r6c7,r79c9<>8
  15. Row 6 / Column 9 → 8 (Hidden Single)
  16. Row 9 / Column 6 → 8 (Hidden Single)
  17. Row 5 / Column 9 → 9 (Hidden Single)
  18. Row 4 / Column 3 → 9 (Hidden Single)
  19. Locked Candidates Type 1 (Pointing): 1 in b1 => r2c4<>1
  20. Locked Candidates Type 1 (Pointing): 5 in b1 => r2c4<>5
  21. Locked Candidates Type 1 (Pointing): 3 in b2 => r49c4<>3
  22. Locked Candidates Type 1 (Pointing): 4 in b2 => r46c4<>4
  23. Row 4 / Column 4 → 2 (Naked Single)
  24. Row 4 / Column 2 → 8 (Naked Single)
  25. Row 9 / Column 4 → 5 (Naked Single)
  26. Row 9 / Column 9 → 3 (Naked Single)
  27. Row 7 / Column 9 → 5 (Full House)
  28. Row 9 / Column 5 → 2 (Full House)
  29. Row 7 / Column 1 → 8 (Naked Single)
  30. Row 8 / Column 5 → 3 (Naked Single)
  31. Row 3 / Column 1 → 4 (Naked Single)
  32. Row 7 / Column 7 → 2 (Naked Single)
  33. Row 8 / Column 7 → 8 (Full House)
  34. Row 3 / Column 4 → 3 (Naked Single)
  35. Row 3 / Column 3 → 8 (Full House)
  36. Row 4 / Column 1 → 6 (Naked Single)
  37. Row 7 / Column 3 → 3 (Naked Single)
  38. Row 2 / Column 4 → 4 (Naked Single)
  39. Row 4 / Column 6 → 3 (Naked Single)
  40. Row 2 / Column 3 → 5 (Naked Single)
  41. Row 4 / Column 8 → 7 (Naked Single)
  42. Row 4 / Column 5 → 4 (Full House)
  43. Row 5 / Column 8 → 3 (Full House)
  44. Row 2 / Column 1 → 1 (Naked Single)
  45. Row 2 / Column 2 → 3 (Full House)
  46. Row 5 / Column 1 → 5 (Full House)
  47. Row 8 / Column 3 → 2 (Naked Single)
  48. Row 5 / Column 3 → 4 (Full House)
  49. Row 8 / Column 2 → 5 (Full House)
  50. Row 6 / Column 2 → 1 (Naked Single)
  51. Row 5 / Column 2 → 2 (Full House)
  52. Row 5 / Column 7 → 6 (Naked Single)
  53. Row 6 / Column 7 → 4 (Full House)
  54. Row 6 / Column 4 → 9 (Naked Single)
  55. Row 1 / Column 4 → 1 (Full House)
  56. Row 5 / Column 6 → 1 (Naked Single)
  57. Row 5 / Column 5 → 7 (Full House)
  58. Row 6 / Column 5 → 5 (Naked Single)
  59. Row 6 / Column 6 → 6 (Full House)
  60. Row 7 / Column 6 → 9 (Naked Single)
  61. Row 1 / Column 6 → 5 (Full House)
  62. Row 1 / Column 5 → 9 (Full House)
  63. Row 7 / Column 5 → 1 (Full House)
Show More...