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

This Sudoku Puzzle has 60 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Remote Pair, undefined techniques.

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

Solution Steps:

  1. Row 6 / Column 9 → 9 (Hidden Single)
  2. Row 9 / Column 8 → 7 (Hidden Single)
  3. Row 8 / Column 8 → 5 (Hidden Single)
  4. Row 7 / Column 9 → 1 (Naked Single)
  5. Row 8 / Column 6 → 2 (Naked Single)
  6. Row 7 / Column 7 → 9 (Naked Single)
  7. Row 8 / Column 4 → 9 (Naked Single)
  8. Row 2 / Column 4 → 6 (Naked Single)
  9. Row 2 / Column 6 → 1 (Naked Single)
  10. Row 1 / Column 6 → 7 (Naked Single)
  11. Row 2 / Column 1 → 4 (Naked Single)
  12. Row 3 / Column 6 → 8 (Naked Single)
  13. Row 2 / Column 8 → 3 (Naked Single)
  14. Row 2 / Column 2 → 9 (Full House)
  15. Row 3 / Column 5 → 2 (Naked Single)
  16. Row 1 / Column 5 → 9 (Full House)
  17. Row 3 / Column 9 → 5 (Naked Single)
  18. Row 1 / Column 9 → 2 (Naked Single)
  19. Row 1 / Column 7 → 1 (Naked Single)
  20. Row 3 / Column 7 → 4 (Full House)
  21. Row 1 / Column 1 → 5 (Naked Single)
  22. Row 1 / Column 3 → 3 (Full House)
  23. Row 7 / Column 1 → 8 (Naked Single)
  24. Row 8 / Column 3 → 1 (Naked Single)
  25. Row 8 / Column 2 → 3 (Full House)
  26. Row 9 / Column 1 → 2 (Naked Single)
  27. Row 3 / Column 3 → 6 (Naked Single)
  28. Row 3 / Column 1 → 1 (Full House)
  29. Row 5 / Column 1 → 6 (Full House)
  30. Row 5 / Column 9 → 3 (Naked Single)
  31. Row 9 / Column 9 → 6 (Full House)
  32. Row 9 / Column 7 → 3 (Full House)
  33. Row 5 / Column 7 → 2 (Naked Single)
  34. Row 4 / Column 7 → 6 (Full House)
  35. Row 9 / Column 3 → 9 (Hidden Single)
  36. Row 9 / Column 5 → 8 (Hidden Single)
  37. Row 6 / Column 6 → 6 (Hidden Single)
  38. Row 4 / Column 5 → 3 (Hidden Single)
  39. Locked Candidates Type 1 (Pointing): 5 in b5 => r4c23<>5
  40. Remote Pair: 4/5 r4c6 -5- r9c6 -4- r9c2 -5- r7c3 => r4c3<>4
  41. Row 4 / Column 3 → 8 (Naked Single)
  42. Row 6 / Column 8 → 8 (Hidden Single)
  43. W-Wing: 4/7 in r6c3,r7c5 connected by 7 in r5c35 => r6c5,r7c3<>4
  44. Row 7 / Column 3 → 5 (Naked Single)
  45. Row 9 / Column 2 → 4 (Full House)
  46. Row 9 / Column 6 → 5 (Full House)
  47. Row 4 / Column 6 → 4 (Full House)
  48. Row 7 / Column 4 → 7 (Naked Single)
  49. Row 7 / Column 5 → 4 (Full House)
  50. Row 4 / Column 8 → 1 (Naked Single)
  51. Row 5 / Column 8 → 4 (Full House)
  52. Row 6 / Column 4 → 2 (Naked Single)
  53. Row 4 / Column 4 → 5 (Full House)
  54. Row 4 / Column 2 → 2 (Full House)
  55. Row 5 / Column 3 → 7 (Naked Single)
  56. Row 6 / Column 3 → 4 (Full House)
  57. Row 6 / Column 2 → 1 (Naked Single)
  58. Row 5 / Column 2 → 5 (Full House)
  59. Row 5 / Column 5 → 1 (Full House)
  60. Row 6 / Column 5 → 7 (Full House)
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