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

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

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

Solution Steps:

  1. Row 4 / Column 5 → 5 (Hidden Single)
  2. Row 5 / Column 9 → 9 (Hidden Single)
  3. Row 6 / Column 7 → 6 (Hidden Single)
  4. Row 7 / Column 2 → 5 (Hidden Single)
  5. Row 5 / Column 7 → 1 (Hidden Single)
  6. Locked Pair: 2,6 in r4c23 => r4c6,r5c3<>2
  7. Row 5 / Column 3 → 8 (Naked Single)
  8. Row 6 / Column 2 → 1 (Naked Single)
  9. Row 6 / Column 4 → 8 (Hidden Single)
  10. Naked Pair: 4,6 in r27c1 => r18c1<>4
  11. Locked Candidates Type 1 (Pointing): 4 in b1 => r2c79<>4
  12. X-Wing: 6 c14 r27 => r2c36<>6
  13. Naked Triple: 2,5,7 in r2c679 => r2c34<>2, r2c4<>7
  14. X-Wing: 9 r28 c34 => r17c4,r9c3<>9
  15. Swordfish: 2 r258 c467 => r1c47,r3c6,r7c47<>2
  16. Row 1 / Column 4 → 3 (Naked Single)
  17. Row 1 / Column 7 → 4 (Naked Single)
  18. Row 7 / Column 7 → 7 (Naked Single)
  19. Row 7 / Column 4 → 6 (Naked Single)
  20. Row 2 / Column 4 → 9 (Naked Single)
  21. Row 7 / Column 1 → 4 (Naked Single)
  22. Row 2 / Column 3 → 4 (Naked Single)
  23. Row 8 / Column 4 → 2 (Naked Single)
  24. Row 5 / Column 4 → 7 (Full House)
  25. Row 2 / Column 1 → 6 (Naked Single)
  26. Row 7 / Column 5 → 9 (Naked Single)
  27. Row 7 / Column 8 → 2 (Full House)
  28. Row 8 / Column 7 → 5 (Naked Single)
  29. Row 2 / Column 7 → 2 (Full House)
  30. Row 5 / Column 1 → 3 (Naked Single)
  31. Row 5 / Column 6 → 2 (Full House)
  32. Row 6 / Column 5 → 4 (Naked Single)
  33. Row 4 / Column 6 → 3 (Full House)
  34. Row 1 / Column 8 → 8 (Naked Single)
  35. Row 2 / Column 6 → 7 (Naked Single)
  36. Row 2 / Column 9 → 5 (Full House)
  37. Row 6 / Column 1 → 7 (Naked Single)
  38. Row 6 / Column 8 → 3 (Full House)
  39. Row 1 / Column 1 → 1 (Naked Single)
  40. Row 8 / Column 1 → 8 (Full House)
  41. Row 3 / Column 8 → 7 (Naked Single)
  42. Row 3 / Column 9 → 3 (Full House)
  43. Row 1 / Column 5 → 2 (Naked Single)
  44. Row 1 / Column 2 → 9 (Full House)
  45. Row 3 / Column 3 → 2 (Naked Single)
  46. Row 3 / Column 2 → 8 (Full House)
  47. Row 8 / Column 9 → 4 (Naked Single)
  48. Row 4 / Column 8 → 4 (Naked Single)
  49. Row 4 / Column 9 → 7 (Full House)
  50. Row 9 / Column 8 → 9 (Full House)
  51. Row 9 / Column 9 → 8 (Full House)
  52. Row 3 / Column 5 → 1 (Naked Single)
  53. Row 3 / Column 6 → 6 (Full House)
  54. Row 9 / Column 5 → 7 (Full House)
  55. Row 9 / Column 2 → 6 (Naked Single)
  56. Row 4 / Column 2 → 2 (Full House)
  57. Row 4 / Column 3 → 6 (Full House)
  58. Row 8 / Column 6 → 1 (Naked Single)
  59. Row 8 / Column 3 → 9 (Full House)
  60. Row 9 / Column 3 → 1 (Full House)
  61. Row 9 / Column 6 → 4 (Full House)
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