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

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

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

Solution Steps:

  1. Row 4 / Column 4 → 9 (Hidden Single)
  2. Row 6 / Column 7 → 1 (Hidden Single)
  3. Row 3 / Column 2 → 1 (Hidden Single)
  4. Row 9 / Column 2 → 5 (Hidden Single)
  5. Row 8 / Column 6 → 1 (Hidden Single)
  6. Row 9 / Column 9 → 1 (Hidden Single)
  7. Row 9 / Column 3 → 8 (Hidden Single)
  8. Row 8 / Column 4 → 5 (Hidden Single)
  9. Row 9 / Column 8 → 7 (Hidden Single)
  10. Row 7 / Column 5 → 3 (Hidden Single)
  11. Row 7 / Column 2 → 7 (Naked Single)
  12. Row 1 / Column 2 → 8 (Naked Single)
  13. Row 4 / Column 2 → 6 (Naked Single)
  14. Row 6 / Column 2 → 3 (Full House)
  15. Row 7 / Column 8 → 2 (Hidden Single)
  16. Row 7 / Column 6 → 6 (Naked Single)
  17. Locked Candidates Type 1 (Pointing): 9 in b9 => r1c7<>9
  18. Naked Triple: 2,4,5 in r149c5 => r6c5<>2, r6c5<>4
  19. X-Wing: 5 r25 c67 => r1c67<>5
  20. X-Wing: 6 c58 r36 => r3c49<>6
  21. Row 3 / Column 4 → 3 (Naked Single)
  22. X-Wing: 7 r34 c39 => r2c39,r5c39<>7
  23. Naked Triple: 2,4,6 in r5c349 => r5c16<>2, r5c17<>4, r5c7<>6
  24. Swordfish: 4 r167 c178 => r4c8,r8c17<>4
  25. Row 4 / Column 8 → 5 (Naked Single)
  26. Row 5 / Column 7 → 7 (Naked Single)
  27. Row 1 / Column 7 → 4 (Naked Single)
  28. Row 5 / Column 1 → 8 (Naked Single)
  29. Row 1 / Column 8 → 9 (Naked Single)
  30. Row 7 / Column 7 → 9 (Naked Single)
  31. Row 7 / Column 1 → 4 (Full House)
  32. Row 5 / Column 6 → 5 (Naked Single)
  33. Row 3 / Column 8 → 6 (Naked Single)
  34. Row 6 / Column 8 → 4 (Full House)
  35. Row 8 / Column 7 → 6 (Naked Single)
  36. Row 2 / Column 7 → 5 (Full House)
  37. Row 8 / Column 9 → 4 (Full House)
  38. Row 6 / Column 1 → 2 (Naked Single)
  39. Row 2 / Column 9 → 8 (Naked Single)
  40. Row 3 / Column 9 → 7 (Full House)
  41. Row 3 / Column 5 → 8 (Naked Single)
  42. Row 3 / Column 3 → 9 (Full House)
  43. Row 4 / Column 9 → 2 (Naked Single)
  44. Row 5 / Column 9 → 6 (Full House)
  45. Row 1 / Column 1 → 7 (Naked Single)
  46. Row 5 / Column 3 → 4 (Naked Single)
  47. Row 4 / Column 3 → 7 (Full House)
  48. Row 4 / Column 5 → 4 (Full House)
  49. Row 5 / Column 4 → 2 (Full House)
  50. Row 6 / Column 6 → 8 (Naked Single)
  51. Row 6 / Column 5 → 6 (Full House)
  52. Row 8 / Column 3 → 3 (Naked Single)
  53. Row 2 / Column 3 → 2 (Full House)
  54. Row 2 / Column 1 → 3 (Full House)
  55. Row 8 / Column 1 → 9 (Full House)
  56. Row 1 / Column 6 → 2 (Naked Single)
  57. Row 2 / Column 6 → 7 (Full House)
  58. Row 2 / Column 4 → 6 (Full House)
  59. Row 9 / Column 4 → 4 (Full House)
  60. Row 9 / Column 5 → 2 (Full House)
  61. Row 1 / Column 5 → 5 (Full House)
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