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

This Sudoku Puzzle has 66 steps and it is solved using Naked Single, Hidden Single, Locked Candidates Type 1 (Pointing), Full House, undefined, Finned Swordfish, Locked Candidates Type 2 (Claiming), Naked Triple 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 4 / Column 3 → 2 (Naked Single)
  2. Row 2 / Column 3 → 3 (Hidden Single)
  3. Row 6 / Column 3 → 5 (Hidden Single)
  4. Row 2 / Column 1 → 2 (Hidden Single)
  5. Row 5 / Column 4 → 2 (Hidden Single)
  6. Row 6 / Column 1 → 9 (Hidden Single)
  7. Row 2 / Column 9 → 9 (Hidden Single)
  8. Row 6 / Column 9 → 2 (Hidden Single)
  9. Row 4 / Column 1 → 7 (Hidden Single)
  10. Row 8 / Column 1 → 8 (Hidden Single)
  11. Locked Candidates Type 1 (Pointing): 9 in b1 => r78c2<>9
  12. Row 8 / Column 2 → 1 (Naked Single)
  13. Row 8 / Column 3 → 9 (Hidden Single)
  14. Row 7 / Column 3 → 4 (Full House)
  15. Locked Candidates Type 1 (Pointing): 6 in b4 => r13c2<>6
  16. X-Wing: 7 r26 c57 => r19c5,r5c7<>7
  17. Finned Swordfish: 6 r267 c578 fr7c4 fr7c6 => r8c5<>6
  18. Row 8 / Column 5 → 4 (Naked Single)
  19. Row 9 / Column 8 → 4 (Hidden Single)
  20. Row 9 / Column 2 → 2 (Hidden Single)
  21. Row 7 / Column 2 → 7 (Full House)
  22. Row 7 / Column 8 → 2 (Hidden Single)
  23. Row 7 / Column 7 → 1 (Hidden Single)
  24. XYZ-Wing: 6/7/8 in r2c78,r6c7 => r3c7<>6
  25. XYZ-Wing: 1/3/6 in r14c5,r4c4 => r6c5<>6
  26. Locked Candidates Type 2 (Claiming): 6 in r6 => r4c79,r5c789<>6
  27. XY-Wing: 6/7/5 in r5c9,r68c7 => r5c7,r8c9<>5
  28. Row 8 / Column 9 → 6 (Naked Single)
  29. Row 8 / Column 7 → 5 (Full House)
  30. Naked Triple: 3,4,8 in r345c7 => r2c7<>8
  31. XY-Wing: 1/8/7 in r69c5,r9c6 => r5c6<>7
  32. Row 5 / Column 9 → 7 (Hidden Single)
  33. Row 6 / Column 7 → 6 (Naked Single)
  34. Row 2 / Column 7 → 7 (Naked Single)
  35. Row 6 / Column 8 → 1 (Naked Single)
  36. Row 6 / Column 5 → 7 (Full House)
  37. Row 4 / Column 9 → 4 (Naked Single)
  38. Row 5 / Column 8 → 5 (Hidden Single)
  39. Row 1 / Column 4 → 4 (Hidden Single)
  40. Row 3 / Column 7 → 4 (Hidden Single)
  41. Row 1 / Column 6 → 7 (Hidden Single)
  42. Row 9 / Column 6 → 8 (Naked Single)
  43. Row 9 / Column 5 → 1 (Naked Single)
  44. Row 9 / Column 4 → 7 (Full House)
  45. Row 1 / Column 2 → 9 (Hidden Single)
  46. Row 3 / Column 2 → 5 (Naked Single)
  47. Row 3 / Column 9 → 1 (Naked Single)
  48. Row 1 / Column 9 → 5 (Full House)
  49. Row 3 / Column 1 → 6 (Naked Single)
  50. Row 1 / Column 1 → 1 (Full House)
  51. Row 3 / Column 4 → 9 (Naked Single)
  52. Row 3 / Column 6 → 3 (Naked Single)
  53. Row 3 / Column 8 → 8 (Full House)
  54. Row 7 / Column 4 → 6 (Naked Single)
  55. Row 4 / Column 4 → 1 (Full House)
  56. Row 7 / Column 6 → 9 (Full House)
  57. Row 5 / Column 6 → 6 (Full House)
  58. Row 4 / Column 5 → 3 (Full House)
  59. Row 1 / Column 5 → 6 (Naked Single)
  60. Row 1 / Column 8 → 3 (Full House)
  61. Row 2 / Column 8 → 6 (Full House)
  62. Row 2 / Column 5 → 8 (Full House)
  63. Row 5 / Column 2 → 8 (Naked Single)
  64. Row 4 / Column 2 → 6 (Full House)
  65. Row 4 / Column 7 → 8 (Full House)
  66. Row 5 / Column 7 → 3 (Full House)
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