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

This Sudoku Puzzle has 61 steps and it is solved using Hidden Single, Naked Single, Full House, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, undefined techniques.

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

Solution Steps:

  1. Row 6 / Column 1 → 9 (Hidden Single)
  2. Row 4 / Column 6 → 3 (Hidden Single)
  3. Row 7 / Column 4 → 1 (Hidden Single)
  4. Row 4 / Column 2 → 5 (Hidden Single)
  5. Row 9 / Column 6 → 5 (Hidden Single)
  6. Row 5 / Column 5 → 5 (Hidden Single)
  7. Row 9 / Column 1 → 1 (Hidden Single)
  8. Row 8 / Column 4 → 6 (Hidden Single)
  9. Row 4 / Column 8 → 1 (Hidden Single)
  10. Row 6 / Column 2 → 1 (Hidden Single)
  11. Row 8 / Column 6 → 7 (Hidden Single)
  12. Row 6 / Column 4 → 8 (Hidden Single)
  13. Row 4 / Column 4 → 4 (Naked Single)
  14. Row 2 / Column 4 → 2 (Full House)
  15. Row 4 / Column 7 → 8 (Full House)
  16. Row 6 / Column 6 → 2 (Full House)
  17. Row 6 / Column 8 → 4 (Full House)
  18. Row 9 / Column 9 → 8 (Hidden Single)
  19. Locked Candidates Type 1 (Pointing): 4 in b8 => r123c5<>4
  20. Row 2 / Column 5 → 8 (Naked Single)
  21. Row 2 / Column 2 → 4 (Naked Single)
  22. Row 2 / Column 6 → 9 (Naked Single)
  23. Row 8 / Column 2 → 8 (Hidden Single)
  24. Row 1 / Column 7 → 9 (Hidden Single)
  25. Locked Candidates Type 2 (Claiming): 4 in r8 => r7c13,r9c3<>4
  26. Naked Pair: 2,4 in r7c59 => r7c378<>2, r7c7<>4
  27. Row 7 / Column 7 → 6 (Naked Single)
  28. Row 5 / Column 8 → 6 (Hidden Single)
  29. Row 9 / Column 2 → 6 (Hidden Single)
  30. Row 1 / Column 2 → 2 (Full House)
  31. Row 1 / Column 3 → 3 (Naked Single)
  32. Row 1 / Column 5 → 1 (Naked Single)
  33. Row 3 / Column 5 → 3 (Naked Single)
  34. Row 3 / Column 9 → 1 (Hidden Single)
  35. W-Wing: 4/2 in r3c7,r7c9 connected by 2 in r5c79 => r1c9,r9c7<>4
  36. Row 1 / Column 9 → 7 (Naked Single)
  37. Row 1 / Column 1 → 6 (Naked Single)
  38. Row 1 / Column 6 → 4 (Full House)
  39. Row 3 / Column 6 → 6 (Full House)
  40. Row 2 / Column 8 → 5 (Naked Single)
  41. Row 2 / Column 1 → 7 (Full House)
  42. Row 5 / Column 9 → 2 (Naked Single)
  43. Row 5 / Column 7 → 7 (Full House)
  44. Row 7 / Column 9 → 4 (Full House)
  45. Row 3 / Column 8 → 2 (Naked Single)
  46. Row 3 / Column 7 → 4 (Full House)
  47. Row 9 / Column 7 → 2 (Full House)
  48. Row 7 / Column 5 → 2 (Naked Single)
  49. Row 9 / Column 5 → 4 (Full House)
  50. Row 8 / Column 8 → 3 (Naked Single)
  51. Row 9 / Column 3 → 9 (Naked Single)
  52. Row 9 / Column 8 → 7 (Full House)
  53. Row 7 / Column 8 → 9 (Full House)
  54. Row 8 / Column 1 → 4 (Naked Single)
  55. Row 8 / Column 3 → 2 (Full House)
  56. Row 7 / Column 3 → 5 (Naked Single)
  57. Row 7 / Column 1 → 3 (Full House)
  58. Row 5 / Column 1 → 8 (Naked Single)
  59. Row 3 / Column 1 → 5 (Full House)
  60. Row 3 / Column 3 → 8 (Full House)
  61. Row 5 / Column 3 → 4 (Full House)
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