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

This Sudoku Puzzle has 82 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Pair, Naked Single, Locked Candidates Type 2 (Claiming), Naked Triple, Hidden Triple, Swordfish, undefined, Skyscraper, Full House, Naked Pair, Bivalue Universal Grave + 1 techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 8 → 3 (Hidden Single)
  2. Row 6 / Column 6 → 1 (Hidden Single)
  3. Row 8 / Column 9 → 1 (Hidden Single)
  4. Row 7 / Column 3 → 1 (Hidden Single)
  5. Row 2 / Column 5 → 1 (Hidden Single)
  6. Row 5 / Column 7 → 1 (Hidden Single)
  7. Locked Candidates Type 1 (Pointing): 2 in b3 => r79c9<>2
  8. Locked Candidates Type 1 (Pointing): 5 in b3 => r79c7<>5
  9. Locked Candidates Type 1 (Pointing): 4 in b5 => r78c4<>4
  10. Row 8 / Column 2 → 4 (Hidden Single)
  11. Row 2 / Column 9 → 4 (Hidden Single)
  12. Row 3 / Column 1 → 4 (Hidden Single)
  13. Locked Pair: 6,9 in r79c1 => r15c1,r7c2,r9c3<>9, r5c1,r7c2<>6
  14. Row 5 / Column 9 → 6 (Hidden Single)
  15. Row 4 / Column 2 → 6 (Hidden Single)
  16. Locked Candidates Type 1 (Pointing): 8 in b6 => r4c46<>8
  17. Locked Candidates Type 1 (Pointing): 9 in b6 => r789c8<>9
  18. Row 8 / Column 8 → 8 (Naked Single)
  19. Row 4 / Column 7 → 8 (Hidden Single)
  20. Locked Pair: 5,7 in r13c7 => r13c9,r79c7<>7
  21. Locked Candidates Type 1 (Pointing): 7 in b6 => r79c8<>7
  22. Locked Candidates Type 2 (Claiming): 2 in r2 => r1c45,r3c456<>2
  23. Locked Candidates Type 2 (Claiming): 6 in r8 => r7c46,r9c6<>6
  24. Locked Candidates Type 2 (Claiming): 9 in r8 => r7c456,r9c56<>9
  25. Locked Candidates Type 2 (Claiming): 2 in c5 => r7c46,r9c6<>2
  26. Naked Triple: 3,5,8 in r7c46,r9c6 => r79c5<>5, r79c5<>8
  27. Hidden Triple: 3,6,7 in r13c4,r3c6 => r13c4,r3c6<>5, r13c4,r3c6<>8, r13c4,r3c6<>9
  28. Locked Candidates Type 1 (Pointing): 9 in b2 => r5c5<>9
  29. Naked Triple: 3,5,7 in r1c147 => r1c3<>3, r1c5<>5
  30. Swordfish: 5 c157 r135 => r3c2,r5c4<>5
  31. W-Wing: 9/8 in r1c5,r3c2 connected by 8 in r13c9 => r1c3,r3c5<>9
  32. Row 1 / Column 5 → 9 (Hidden Single)
  33. W-Wing: 5/8 in r2c2,r9c6 connected by 8 in r7c2,r9c3 => r2c6<>5
  34. Locked Candidates Type 2 (Claiming): 5 in c6 => r7c4<>5
  35. Hidden Triple: 2,4,5 in r246c4 => r2c4<>8, r46c4<>9
  36. Skyscraper: 8 in r2c2,r9c3 (connected by r29c6) => r13c3,r7c2<>8
  37. Row 1 / Column 3 → 2 (Naked Single)
  38. Row 7 / Column 2 → 7 (Naked Single)
  39. Row 1 / Column 9 → 8 (Naked Single)
  40. Row 7 / Column 9 → 9 (Naked Single)
  41. Row 9 / Column 3 → 8 (Naked Single)
  42. Row 3 / Column 9 → 2 (Naked Single)
  43. Row 9 / Column 9 → 7 (Full House)
  44. Row 7 / Column 1 → 6 (Naked Single)
  45. Row 9 / Column 1 → 9 (Full House)
  46. Row 9 / Column 6 → 5 (Naked Single)
  47. Row 7 / Column 7 → 4 (Naked Single)
  48. Row 9 / Column 8 → 2 (Naked Single)
  49. Row 7 / Column 5 → 2 (Naked Single)
  50. Row 9 / Column 7 → 6 (Naked Single)
  51. Row 7 / Column 8 → 5 (Full House)
  52. Row 9 / Column 5 → 4 (Full House)
  53. Naked Pair: 3,9 in r35c3 => r46c3<>9
  54. Bivalue Universal Grave + 1 => r3c4<>6, r3c4<>7
  55. Row 3 / Column 4 → 3 (Naked Single)
  56. Row 1 / Column 4 → 7 (Naked Single)
  57. Row 3 / Column 3 → 9 (Naked Single)
  58. Row 3 / Column 6 → 6 (Naked Single)
  59. Row 7 / Column 4 → 8 (Naked Single)
  60. Row 7 / Column 6 → 3 (Full House)
  61. Row 1 / Column 7 → 5 (Naked Single)
  62. Row 1 / Column 1 → 3 (Full House)
  63. Row 3 / Column 7 → 7 (Full House)
  64. Row 5 / Column 1 → 5 (Full House)
  65. Row 3 / Column 2 → 8 (Naked Single)
  66. Row 2 / Column 2 → 5 (Full House)
  67. Row 6 / Column 2 → 9 (Full House)
  68. Row 3 / Column 5 → 5 (Full House)
  69. Row 5 / Column 5 → 8 (Full House)
  70. Row 5 / Column 3 → 3 (Naked Single)
  71. Row 5 / Column 4 → 9 (Full House)
  72. Row 8 / Column 6 → 9 (Naked Single)
  73. Row 8 / Column 4 → 6 (Full House)
  74. Row 2 / Column 4 → 2 (Naked Single)
  75. Row 2 / Column 6 → 8 (Full House)
  76. Row 4 / Column 6 → 2 (Full House)
  77. Row 6 / Column 8 → 7 (Naked Single)
  78. Row 4 / Column 8 → 9 (Full House)
  79. Row 4 / Column 4 → 4 (Naked Single)
  80. Row 4 / Column 3 → 7 (Full House)
  81. Row 6 / Column 3 → 4 (Full House)
  82. Row 6 / Column 4 → 5 (Full House)
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