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

This Sudoku Puzzle has 71 steps and it is solved using Hidden Single, Locked Pair, Locked Candidates Type 1 (Pointing), Naked Single, Full House, Locked Candidates Type 2 (Claiming), Naked Pair, undefined, Turbot Fish, Uniqueness Test 4, Hidden Rectangle 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 2 / Column 4 → 1 (Hidden Single)
  2. Row 6 / Column 4 → 8 (Hidden Single)
  3. Row 5 / Column 7 → 8 (Hidden Single)
  4. Row 8 / Column 3 → 1 (Hidden Single)
  5. Row 5 / Column 1 → 1 (Hidden Single)
  6. Row 4 / Column 4 → 7 (Hidden Single)
  7. Row 1 / Column 7 → 1 (Hidden Single)
  8. Row 6 / Column 9 → 1 (Hidden Single)
  9. Row 7 / Column 3 → 7 (Hidden Single)
  10. Row 6 / Column 8 → 7 (Hidden Single)
  11. Row 3 / Column 7 → 7 (Hidden Single)
  12. Row 8 / Column 9 → 7 (Hidden Single)
  13. Row 1 / Column 5 → 7 (Hidden Single)
  14. Row 4 / Column 7 → 3 (Hidden Single)
  15. Row 8 / Column 8 → 3 (Hidden Single)
  16. Row 5 / Column 6 → 3 (Hidden Single)
  17. Row 5 / Column 9 → 2 (Hidden Single)
  18. Locked Pair: 4,6 in r79c9 => r13c9<>6, r3c9,r79c7<>4
  19. Row 2 / Column 7 → 4 (Hidden Single)
  20. Locked Candidates Type 1 (Pointing): 5 in b4 => r123c3<>5
  21. Locked Candidates Type 1 (Pointing): 5 in b6 => r23c8<>5
  22. Row 2 / Column 6 → 5 (Hidden Single)
  23. Row 6 / Column 3 → 5 (Hidden Single)
  24. Row 8 / Column 6 → 2 (Hidden Single)
  25. Row 8 / Column 4 → 6 (Naked Single)
  26. Row 3 / Column 4 → 2 (Hidden Single)
  27. Row 4 / Column 8 → 5 (Hidden Single)
  28. Row 5 / Column 8 → 4 (Full House)
  29. Locked Candidates Type 2 (Claiming): 2 in c1 => r9c3<>2
  30. Naked Pair: 6,9 in r3c58 => r3c13<>6, r3c3<>9
  31. 2-String Kite: 6 in r1c6,r5c3 (connected by r4c6,r5c5) => r1c3<>6
  32. Turbot Fish: 9 r1c6 =9= r6c6 -9- r6c2 =9= r5c3 => r1c3<>9
  33. X-Wing: 9 r16 c26 => r2c2<>9
  34. XYZ-Wing: 4/6/8 in r8c2,r9c39 => r9c1<>4
  35. Uniqueness Test 4: 5/9 in r5c45,r9c45 => r59c5<>9
  36. Hidden Rectangle: 2/6 in r2c23,r4c23 => r4c3<>6
  37. Finned X-Wing: 6 r14 c26 fr1c1 => r2c2<>6
  38. Row 2 / Column 2 → 2 (Naked Single)
  39. Row 4 / Column 3 → 2 (Hidden Single)
  40. Locked Candidates Type 1 (Pointing): 4 in b4 => r8c2<>4
  41. Row 8 / Column 2 → 8 (Naked Single)
  42. Row 8 / Column 5 → 4 (Full House)
  43. Row 7 / Column 5 → 9 (Naked Single)
  44. Row 3 / Column 5 → 6 (Naked Single)
  45. Row 1 / Column 6 → 9 (Full House)
  46. Row 7 / Column 7 → 2 (Naked Single)
  47. Row 9 / Column 7 → 9 (Full House)
  48. Row 9 / Column 4 → 5 (Naked Single)
  49. Row 5 / Column 4 → 9 (Full House)
  50. Row 9 / Column 5 → 8 (Full House)
  51. Row 5 / Column 5 → 5 (Full House)
  52. Row 5 / Column 3 → 6 (Full House)
  53. Row 3 / Column 8 → 9 (Naked Single)
  54. Row 2 / Column 8 → 6 (Full House)
  55. Row 2 / Column 3 → 9 (Full House)
  56. Row 1 / Column 2 → 6 (Naked Single)
  57. Row 6 / Column 6 → 4 (Naked Single)
  58. Row 4 / Column 6 → 6 (Full House)
  59. Row 4 / Column 2 → 4 (Full House)
  60. Row 6 / Column 2 → 9 (Full House)
  61. Row 9 / Column 3 → 4 (Naked Single)
  62. Row 1 / Column 1 → 5 (Naked Single)
  63. Row 3 / Column 3 → 3 (Naked Single)
  64. Row 1 / Column 3 → 8 (Full House)
  65. Row 1 / Column 9 → 3 (Full House)
  66. Row 3 / Column 1 → 4 (Full House)
  67. Row 3 / Column 9 → 5 (Full House)
  68. Row 7 / Column 1 → 6 (Naked Single)
  69. Row 7 / Column 9 → 4 (Full House)
  70. Row 9 / Column 9 → 6 (Full House)
  71. Row 9 / Column 1 → 2 (Full House)
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