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

This Sudoku Puzzle has 68 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Naked Single, undefined, Full House, Locked Pair techniques.

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

Solution Steps:

  1. Row 2 / Column 1 → 3 (Hidden Single)
  2. Row 3 / Column 9 → 5 (Hidden Single)
  3. Row 9 / Column 4 → 5 (Hidden Single)
  4. Locked Candidates Type 1 (Pointing): 4 in b2 => r1c78<>4
  5. Locked Candidates Type 1 (Pointing): 1 in b3 => r2c23<>1
  6. Locked Candidates Type 1 (Pointing): 9 in b4 => r89c3<>9
  7. Locked Candidates Type 1 (Pointing): 6 in b6 => r9c7<>6
  8. Naked Triple: 2,7,8 in r2c5,r3c46 => r1c46<>7, r1c46<>8, r1c6<>2
  9. Naked Triple: 2,7,8 in r1c78,r3c8 => r2c789<>2, r2c78<>8, r2c89<>7
  10. Locked Candidates Type 1 (Pointing): 7 in b3 => r789c8<>7
  11. Naked Triple: 2,7,8 in r3c468 => r3c12<>7, r3c12<>8
  12. Naked Triple: 1,4,9 in r289c7 => r46c7<>4
  13. Locked Candidates Type 1 (Pointing): 4 in b6 => r28c9<>4
  14. Row 2 / Column 9 → 1 (Naked Single)
  15. X-Wing: 2 r35 c68 => r17c8,r4c6<>2
  16. Row 7 / Column 9 → 2 (Hidden Single)
  17. Row 4 / Column 9 → 4 (Naked Single)
  18. Row 6 / Column 9 → 3 (Naked Single)
  19. Row 8 / Column 9 → 7 (Full House)
  20. Row 8 / Column 5 → 8 (Naked Single)
  21. Row 8 / Column 8 → 3 (Hidden Single)
  22. Locked Pair: 1,5 in r8c13 => r7c12,r8c27,r9c23<>1, r8c2<>5
  23. Row 9 / Column 3 → 7 (Naked Single)
  24. Row 1 / Column 2 → 5 (Hidden Single)
  25. Row 9 / Column 7 → 1 (Hidden Single)
  26. Row 9 / Column 6 → 9 (Naked Single)
  27. Row 1 / Column 8 → 7 (Hidden Single)
  28. Row 2 / Column 2 → 7 (Hidden Single)
  29. Row 2 / Column 5 → 2 (Naked Single)
  30. Row 2 / Column 3 → 8 (Naked Single)
  31. Row 1 / Column 3 → 2 (Naked Single)
  32. Row 1 / Column 7 → 8 (Naked Single)
  33. Row 3 / Column 8 → 2 (Naked Single)
  34. Row 6 / Column 7 → 6 (Naked Single)
  35. Row 5 / Column 8 → 8 (Naked Single)
  36. Row 4 / Column 7 → 2 (Full House)
  37. Row 6 / Column 5 → 7 (Naked Single)
  38. Row 4 / Column 5 → 6 (Full House)
  39. Row 5 / Column 2 → 1 (Naked Single)
  40. Row 4 / Column 6 → 8 (Naked Single)
  41. Row 3 / Column 2 → 6 (Naked Single)
  42. Row 3 / Column 1 → 1 (Full House)
  43. Row 5 / Column 4 → 3 (Naked Single)
  44. Row 5 / Column 6 → 2 (Full House)
  45. Row 6 / Column 1 → 8 (Naked Single)
  46. Row 6 / Column 3 → 9 (Naked Single)
  47. Row 3 / Column 6 → 7 (Naked Single)
  48. Row 3 / Column 4 → 8 (Full House)
  49. Row 4 / Column 4 → 9 (Naked Single)
  50. Row 9 / Column 2 → 4 (Naked Single)
  51. Row 9 / Column 8 → 6 (Full House)
  52. Row 8 / Column 1 → 5 (Naked Single)
  53. Row 1 / Column 4 → 4 (Naked Single)
  54. Row 1 / Column 6 → 3 (Full House)
  55. Row 7 / Column 1 → 6 (Naked Single)
  56. Row 4 / Column 1 → 7 (Full House)
  57. Row 4 / Column 3 → 5 (Full House)
  58. Row 8 / Column 3 → 1 (Full House)
  59. Row 7 / Column 6 → 1 (Naked Single)
  60. Row 6 / Column 6 → 4 (Full House)
  61. Row 6 / Column 4 → 1 (Full House)
  62. Row 7 / Column 4 → 7 (Full House)
  63. Row 8 / Column 2 → 9 (Naked Single)
  64. Row 7 / Column 2 → 8 (Full House)
  65. Row 7 / Column 8 → 9 (Full House)
  66. Row 8 / Column 7 → 4 (Full House)
  67. Row 2 / Column 8 → 4 (Full House)
  68. Row 2 / Column 7 → 9 (Full House)
Show More...