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

This Sudoku Puzzle has 74 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Naked Triple, undefined, Turbot Fish, AIC, Naked Single, Full House 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 5 / Column 7 → 1 (Hidden Single)
  2. Row 5 / Column 5 → 4 (Hidden Single)
  3. Row 7 / Column 4 → 6 (Hidden Single)
  4. Row 8 / Column 5 → 9 (Hidden Single)
  5. Row 9 / Column 8 → 4 (Hidden Single)
  6. Row 4 / Column 9 → 4 (Hidden Single)
  7. Row 1 / Column 3 → 4 (Hidden Single)
  8. Row 3 / Column 4 → 4 (Hidden Single)
  9. Row 7 / Column 2 → 4 (Hidden Single)
  10. Row 7 / Column 1 → 3 (Hidden Single)
  11. Locked Candidates Type 1 (Pointing): 8 in b5 => r9c4<>8
  12. Locked Candidates Type 1 (Pointing): 9 in b5 => r2c4<>9
  13. Locked Candidates Type 1 (Pointing): 2 in b6 => r4c13<>2
  14. Locked Candidates Type 1 (Pointing): 6 in b6 => r6c3<>6
  15. Locked Candidates Type 1 (Pointing): 7 in b8 => r9c1<>7
  16. Locked Candidates Type 2 (Claiming): 6 in c8 => r1c79,r2c9<>6
  17. Naked Pair: 3,7 in r4c5,r5c6 => r46c4<>7
  18. Naked Triple: 2,3,7 in r4c578 => r4c13<>7
  19. 2-String Kite: 3 in r2c8,r4c5 (connected by r1c5,r2c6) => r4c8<>3
  20. Locked Candidates Type 1 (Pointing): 3 in b6 => r1c7<>3
  21. Naked Triple: 2,7,8 in r347c8 => r12c8<>2, r1c8<>8, r2c8<>7
  22. Turbot Fish: 7 r3c8 =7= r4c8 -7- r4c5 =7= r5c6 => r3c6<>7
  23. Locked Candidates Type 1 (Pointing): 7 in b2 => r2c9<>7
  24. Finned X-Wing: 8 r18 c17 fr8c2 fr8c3 => r9c1<>8
  25. XY-Chain: 2 2- r1c9 -5- r1c5 -3- r4c5 -7- r4c8 -2 => r3c8<>2
  26. AIC: 3 3- r1c5 -5- r7c5 -1- r7c3 =1= r2c3 -1- r2c9 =1= r3c9 =7= r3c8 -7- r4c8 =7= r4c5 =3= r5c6 -3 => r12c6,r4c5<>3
  27. Row 4 / Column 5 → 7 (Naked Single)
  28. Row 4 / Column 8 → 2 (Naked Single)
  29. Row 5 / Column 6 → 3 (Naked Single)
  30. Row 4 / Column 7 → 3 (Naked Single)
  31. Row 7 / Column 8 → 8 (Naked Single)
  32. Row 5 / Column 2 → 2 (Naked Single)
  33. Row 6 / Column 7 → 6 (Naked Single)
  34. Row 6 / Column 9 → 7 (Full House)
  35. Row 3 / Column 8 → 7 (Naked Single)
  36. Row 6 / Column 3 → 8 (Naked Single)
  37. Row 4 / Column 3 → 5 (Naked Single)
  38. Row 6 / Column 4 → 9 (Naked Single)
  39. Row 4 / Column 4 → 8 (Full House)
  40. Row 4 / Column 1 → 9 (Full House)
  41. Row 6 / Column 2 → 3 (Full House)
  42. Row 2 / Column 8 → 3 (Hidden Single)
  43. Row 1 / Column 8 → 6 (Full House)
  44. Row 1 / Column 5 → 3 (Hidden Single)
  45. Row 9 / Column 6 → 8 (Hidden Single)
  46. Row 8 / Column 9 → 6 (Hidden Single)
  47. Row 9 / Column 4 → 7 (Hidden Single)
  48. Row 2 / Column 4 → 2 (Full House)
  49. Row 2 / Column 6 → 7 (Hidden Single)
  50. Row 7 / Column 6 → 2 (Hidden Single)
  51. Row 7 / Column 3 → 1 (Naked Single)
  52. Row 7 / Column 5 → 5 (Full House)
  53. Row 9 / Column 5 → 1 (Full House)
  54. Row 2 / Column 3 → 6 (Naked Single)
  55. Row 5 / Column 3 → 7 (Naked Single)
  56. Row 5 / Column 1 → 6 (Full House)
  57. Row 8 / Column 3 → 2 (Full House)
  58. Row 8 / Column 7 → 5 (Naked Single)
  59. Row 9 / Column 7 → 2 (Full House)
  60. Row 9 / Column 1 → 5 (Full House)
  61. Row 8 / Column 2 → 8 (Naked Single)
  62. Row 8 / Column 1 → 7 (Full House)
  63. Row 2 / Column 1 → 1 (Naked Single)
  64. Row 2 / Column 9 → 5 (Naked Single)
  65. Row 2 / Column 2 → 9 (Full House)
  66. Row 3 / Column 2 → 5 (Full House)
  67. Row 1 / Column 9 → 2 (Naked Single)
  68. Row 3 / Column 9 → 1 (Full House)
  69. Row 3 / Column 6 → 9 (Naked Single)
  70. Row 1 / Column 6 → 5 (Full House)
  71. Row 1 / Column 1 → 8 (Naked Single)
  72. Row 1 / Column 7 → 9 (Full House)
  73. Row 3 / Column 7 → 8 (Full House)
  74. Row 3 / Column 1 → 2 (Full House)
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