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

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

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

Solution Steps:

  1. Row 1 / Column 2 → 8 (Hidden Single)
  2. Row 3 / Column 3 → 5 (Hidden Single)
  3. Row 7 / Column 1 → 5 (Hidden Single)
  4. Row 2 / Column 1 → 2 (Hidden Single)
  5. Row 1 / Column 5 → 2 (Hidden Single)
  6. Row 3 / Column 9 → 2 (Hidden Single)
  7. Row 4 / Column 1 → 4 (Hidden Single)
  8. Row 7 / Column 7 → 2 (Hidden Single)
  9. Row 9 / Column 2 → 2 (Hidden Single)
  10. Row 3 / Column 8 → 6 (Hidden Single)
  11. Row 5 / Column 3 → 2 (Hidden Single)
  12. Row 3 / Column 4 → 9 (Hidden Single)
  13. Row 2 / Column 7 → 9 (Hidden Single)
  14. Row 5 / Column 7 → 8 (Hidden Single)
  15. Row 4 / Column 3 → 8 (Hidden Single)
  16. Row 6 / Column 3 → 6 (Hidden Single)
  17. Row 4 / Column 9 → 6 (Hidden Single)
  18. Row 6 / Column 9 → 7 (Hidden Single)
  19. Row 1 / Column 9 → 5 (Hidden Single)
  20. Row 6 / Column 7 → 5 (Hidden Single)
  21. Locked Candidates Type 1 (Pointing): 7 in b1 => r2c5<>7
  22. Locked Candidates Type 1 (Pointing): 1 in b4 => r7c2<>1
  23. Naked Pair: 1,3 in r5c28 => r5c456<>1, r5c456<>3
  24. Naked Pair: 1,3 in r15c8 => r79c8<>1, r79c8<>3
  25. Empty Rectangle: 1 in b9 (r2c59) => r8c5<>1
  26. W-Wing: 3/1 in r6c5,r9c9 connected by 1 in r2c59 => r9c5<>3
  27. Hidden Rectangle: 4/6 in r5c45,r7c45 => r7c5<>4
  28. Finned X-Wing: 1 r29 c59 fr9c4 fr9c6 => r7c5<>1
  29. Sashimi Swordfish: 1 r256 c258 fr2c9 => r1c8<>1
  30. Row 1 / Column 8 → 3 (Naked Single)
  31. Row 5 / Column 8 → 1 (Naked Single)
  32. Row 4 / Column 7 → 3 (Full House)
  33. Row 5 / Column 2 → 3 (Naked Single)
  34. Row 3 / Column 2 → 4 (Naked Single)
  35. Row 3 / Column 6 → 3 (Full House)
  36. Row 6 / Column 1 → 9 (Naked Single)
  37. Row 6 / Column 2 → 1 (Full House)
  38. Row 8 / Column 1 → 3 (Full House)
  39. Row 6 / Column 5 → 3 (Full House)
  40. Row 2 / Column 2 → 7 (Naked Single)
  41. Row 2 / Column 3 → 3 (Full House)
  42. Row 7 / Column 2 → 9 (Full House)
  43. Row 7 / Column 8 → 7 (Naked Single)
  44. Row 9 / Column 8 → 9 (Full House)
  45. Row 7 / Column 3 → 1 (Naked Single)
  46. Row 8 / Column 3 → 7 (Full House)
  47. Row 7 / Column 5 → 6 (Naked Single)
  48. Row 7 / Column 6 → 4 (Naked Single)
  49. Row 5 / Column 6 → 5 (Naked Single)
  50. Row 8 / Column 5 → 9 (Naked Single)
  51. Row 5 / Column 5 → 4 (Naked Single)
  52. Row 5 / Column 4 → 6 (Full House)
  53. Row 2 / Column 5 → 1 (Naked Single)
  54. Row 2 / Column 9 → 4 (Full House)
  55. Row 1 / Column 7 → 1 (Full House)
  56. Row 8 / Column 7 → 4 (Full House)
  57. Row 1 / Column 6 → 7 (Naked Single)
  58. Row 1 / Column 4 → 4 (Full House)
  59. Row 9 / Column 6 → 1 (Full House)
  60. Row 4 / Column 5 → 7 (Naked Single)
  61. Row 4 / Column 4 → 1 (Full House)
  62. Row 9 / Column 5 → 5 (Full House)
  63. Row 8 / Column 4 → 8 (Naked Single)
  64. Row 8 / Column 9 → 1 (Full House)
  65. Row 9 / Column 9 → 3 (Naked Single)
  66. Row 7 / Column 9 → 8 (Full House)
  67. Row 7 / Column 4 → 3 (Full House)
  68. Row 9 / Column 4 → 7 (Full House)
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