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

This Sudoku Puzzle has 77 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Pair, Locked Candidates Type 2 (Claiming), Turbot Fish, undefined, Continuous Nice Loop, Naked Pair, Full House techniques.

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

Solution Steps:

  1. Row 3 / Column 3 → 5 (Hidden Single)
  2. Row 1 / Column 6 → 5 (Hidden Single)
  3. Row 6 / Column 4 → 5 (Hidden Single)
  4. Row 8 / Column 1 → 1 (Hidden Single)
  5. Row 9 / Column 2 → 5 (Hidden Single)
  6. Row 7 / Column 7 → 5 (Hidden Single)
  7. Row 5 / Column 8 → 5 (Hidden Single)
  8. Row 8 / Column 2 → 7 (Hidden Single)
  9. Row 8 / Column 7 → 3 (Naked Single)
  10. Locked Candidates Type 1 (Pointing): 1 in b6 => r13c9<>1
  11. Locked Candidates Type 1 (Pointing): 9 in b7 => r7c45<>9
  12. Locked Candidates Type 1 (Pointing): 2 in b8 => r456c5<>2
  13. Naked Triple: 4,6,9 in r78c4,r8c6 => r79c5,r9c4<>4, r9c4<>6
  14. Row 9 / Column 4 → 3 (Naked Single)
  15. Locked Candidates Type 1 (Pointing): 4 in b8 => r2c4<>4
  16. Hidden Pair: 1,3 in r12c3 => r12c3<>4, r12c3<>9, r2c3<>2
  17. Naked Triple: 1,3,9 in r2c346 => r2c27<>9, r2c7<>1, r2c8<>3
  18. Locked Candidates Type 2 (Claiming): 9 in r2 => r13c5<>9
  19. Locked Candidates Type 2 (Claiming): 9 in c5 => r4c46,r6c6<>9
  20. Row 6 / Column 6 → 2 (Naked Single)
  21. Turbot Fish: 2 r2c2 =2= r4c2 -2- r4c8 =2= r5c7 => r2c7<>2
  22. Row 2 / Column 7 → 8 (Naked Single)
  23. Row 9 / Column 7 → 7 (Naked Single)
  24. Row 9 / Column 5 → 2 (Naked Single)
  25. Row 7 / Column 5 → 7 (Naked Single)
  26. Row 9 / Column 9 → 8 (Hidden Single)
  27. Locked Candidates Type 2 (Claiming): 4 in r9 => r7c13<>4
  28. Locked Candidates Type 2 (Claiming): 6 in r9 => r7c13<>6
  29. Hidden Pair: 6,7 in r1c89 => r1c89<>3, r1c89<>4, r1c9<>9
  30. Locked Candidates Type 1 (Pointing): 3 in b3 => r3c5<>3
  31. X-Wing: 2 r24 c28 => r3c8<>2
  32. W-Wing: 9/2 in r5c7,r7c1 connected by 2 in r3c17 => r5c1<>9
  33. Continuous Nice Loop: 1/4/9 7= r6c9 =1= r6c5 -1- r3c5 -4- r3c9 =4= r7c9 =6= r1c9 =7= r6c9 =1 => r14c5<>1, r3c18<>4, r6c9<>9
  34. Row 3 / Column 8 → 3 (Naked Single)
  35. Naked Pair: 2,9 in r37c1 => r1c1<>9, r5c1<>2
  36. W-Wing: 2/9 in r3c1,r5c7 connected by 9 in r1c27 => r3c7<>2
  37. Row 3 / Column 1 → 2 (Hidden Single)
  38. Row 2 / Column 2 → 4 (Naked Single)
  39. Row 7 / Column 1 → 9 (Naked Single)
  40. Row 1 / Column 1 → 8 (Naked Single)
  41. Row 2 / Column 8 → 2 (Naked Single)
  42. Row 7 / Column 3 → 2 (Naked Single)
  43. Row 1 / Column 2 → 9 (Naked Single)
  44. Row 5 / Column 1 → 6 (Naked Single)
  45. Row 9 / Column 1 → 4 (Full House)
  46. Row 9 / Column 3 → 6 (Full House)
  47. Row 4 / Column 8 → 8 (Naked Single)
  48. Row 1 / Column 7 → 1 (Naked Single)
  49. Row 6 / Column 2 → 8 (Naked Single)
  50. Row 4 / Column 2 → 2 (Full House)
  51. Row 5 / Column 3 → 9 (Naked Single)
  52. Row 6 / Column 3 → 4 (Full House)
  53. Row 6 / Column 8 → 7 (Naked Single)
  54. Row 1 / Column 3 → 3 (Naked Single)
  55. Row 2 / Column 3 → 1 (Full House)
  56. Row 3 / Column 7 → 9 (Naked Single)
  57. Row 5 / Column 7 → 2 (Full House)
  58. Row 5 / Column 9 → 3 (Naked Single)
  59. Row 5 / Column 5 → 8 (Full House)
  60. Row 1 / Column 8 → 6 (Naked Single)
  61. Row 8 / Column 8 → 4 (Full House)
  62. Row 7 / Column 9 → 6 (Full House)
  63. Row 7 / Column 4 → 4 (Full House)
  64. Row 6 / Column 9 → 1 (Naked Single)
  65. Row 4 / Column 9 → 9 (Full House)
  66. Row 6 / Column 5 → 9 (Full House)
  67. Row 1 / Column 5 → 4 (Naked Single)
  68. Row 1 / Column 9 → 7 (Full House)
  69. Row 3 / Column 9 → 4 (Full House)
  70. Row 3 / Column 5 → 1 (Full House)
  71. Row 4 / Column 5 → 3 (Full House)
  72. Row 2 / Column 4 → 9 (Naked Single)
  73. Row 2 / Column 6 → 3 (Full House)
  74. Row 4 / Column 6 → 6 (Naked Single)
  75. Row 4 / Column 4 → 1 (Full House)
  76. Row 8 / Column 4 → 6 (Full House)
  77. Row 8 / Column 6 → 9 (Full House)
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