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

This Sudoku Puzzle has 71 steps and it is solved using Naked Single, Full House, Locked Candidates Type 1 (Pointing), Hidden Pair, Finned Swordfish, Hidden Single techniques.

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

Solution Steps:

  1. Row 7 / Column 7 → 9 (Naked Single)
  2. Row 7 / Column 9 → 4 (Naked Single)
  3. Row 9 / Column 7 → 1 (Naked Single)
  4. Row 8 / Column 8 → 2 (Full House)
  5. Locked Candidates Type 1 (Pointing): 2 in b1 => r3c46<>2
  6. Locked Candidates Type 1 (Pointing): 9 in b1 => r3c89<>9
  7. Hidden Pair: 2,9 in r3c23 => r3c23<>1, r3c23<>3, r3c23<>4, r3c23<>7
  8. Hidden Pair: 5,8 in r18c5 => r1c5<>3, r18c5<>4, r18c5<>7, r8c5<>9
  9. Finned Swordfish: 5 r157 c269 fr1c5 => r3c6<>5
  10. Locked Candidates Type 1 (Pointing): 5 in b2 => r1c9<>5
  11. Finned Swordfish: 8 r357 c348 fr3c7 => r1c8<>8
  12. Row 1 / Column 5 → 8 (Hidden Single)
  13. Row 8 / Column 5 → 5 (Naked Single)
  14. Row 1 / Column 6 → 5 (Hidden Single)
  15. Row 7 / Column 2 → 5 (Hidden Single)
  16. Row 4 / Column 1 → 5 (Hidden Single)
  17. Row 4 / Column 7 → 3 (Naked Single)
  18. Row 2 / Column 7 → 7 (Naked Single)
  19. Row 6 / Column 7 → 8 (Naked Single)
  20. Row 3 / Column 7 → 5 (Full House)
  21. Row 3 / Column 9 → 1 (Naked Single)
  22. Row 1 / Column 9 → 6 (Naked Single)
  23. Row 2 / Column 9 → 9 (Naked Single)
  24. Row 4 / Column 9 → 2 (Naked Single)
  25. Row 6 / Column 9 → 7 (Naked Single)
  26. Row 5 / Column 9 → 5 (Full House)
  27. Row 9 / Column 5 → 7 (Hidden Single)
  28. Row 3 / Column 6 → 7 (Hidden Single)
  29. Row 3 / Column 8 → 8 (Hidden Single)
  30. Row 5 / Column 3 → 8 (Hidden Single)
  31. Row 8 / Column 1 → 8 (Hidden Single)
  32. Row 8 / Column 4 → 4 (Naked Single)
  33. Row 3 / Column 4 → 3 (Naked Single)
  34. Row 8 / Column 6 → 9 (Naked Single)
  35. Row 3 / Column 1 → 4 (Naked Single)
  36. Row 2 / Column 1 → 6 (Hidden Single)
  37. Row 9 / Column 1 → 3 (Naked Single)
  38. Row 6 / Column 1 → 1 (Naked Single)
  39. Row 1 / Column 1 → 7 (Full House)
  40. Row 7 / Column 3 → 6 (Naked Single)
  41. Row 4 / Column 3 → 4 (Naked Single)
  42. Row 7 / Column 4 → 8 (Naked Single)
  43. Row 7 / Column 6 → 3 (Full House)
  44. Row 4 / Column 2 → 6 (Naked Single)
  45. Row 4 / Column 5 → 9 (Naked Single)
  46. Row 4 / Column 8 → 1 (Full House)
  47. Row 9 / Column 3 → 9 (Naked Single)
  48. Row 5 / Column 8 → 6 (Naked Single)
  49. Row 6 / Column 8 → 9 (Full House)
  50. Row 3 / Column 3 → 2 (Naked Single)
  51. Row 3 / Column 2 → 9 (Full House)
  52. Row 9 / Column 2 → 4 (Naked Single)
  53. Row 6 / Column 3 → 3 (Naked Single)
  54. Row 1 / Column 3 → 1 (Naked Single)
  55. Row 1 / Column 2 → 3 (Full House)
  56. Row 8 / Column 3 → 7 (Full House)
  57. Row 1 / Column 8 → 4 (Full House)
  58. Row 8 / Column 2 → 1 (Full House)
  59. Row 2 / Column 8 → 3 (Full House)
  60. Row 6 / Column 2 → 2 (Naked Single)
  61. Row 5 / Column 2 → 7 (Full House)
  62. Row 6 / Column 5 → 4 (Naked Single)
  63. Row 6 / Column 6 → 6 (Full House)
  64. Row 2 / Column 5 → 2 (Naked Single)
  65. Row 5 / Column 5 → 3 (Full House)
  66. Row 9 / Column 6 → 2 (Naked Single)
  67. Row 9 / Column 4 → 6 (Full House)
  68. Row 2 / Column 4 → 1 (Naked Single)
  69. Row 2 / Column 6 → 4 (Full House)
  70. Row 5 / Column 6 → 1 (Full House)
  71. Row 5 / Column 4 → 2 (Full House)
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