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This Sudoku Puzzle has 82 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Skyscraper, Naked Single, Hidden Pair, Hidden Rectangle, undefined, Locked Candidates Type 2 (Claiming), Naked Triple, Naked Pair, Simple Colors Trap, Sue de Coq, 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 2 / Column 4 → 9 (Hidden Single)
  2. Row 4 / Column 9 → 9 (Hidden Single)
  3. Row 3 / Column 6 → 7 (Hidden Single)
  4. Row 6 / Column 4 → 4 (Hidden Single)
  5. Row 1 / Column 9 → 7 (Hidden Single)
  6. Row 8 / Column 1 → 9 (Hidden Single)
  7. Row 6 / Column 8 → 7 (Hidden Single)
  8. Row 5 / Column 1 → 7 (Hidden Single)
  9. Row 6 / Column 3 → 9 (Hidden Single)
  10. Row 9 / Column 2 → 7 (Hidden Single)
  11. Locked Candidates Type 1 (Pointing): 8 in b1 => r6c1<>8
  12. Locked Candidates Type 1 (Pointing): 2 in b7 => r9c79<>2
  13. Skyscraper: 5 in r1c4,r2c2 (connected by r8c24) => r1c3,r2c6<>5
  14. Row 2 / Column 6 → 6 (Naked Single)
  15. Locked Candidates Type 1 (Pointing): 6 in b3 => r3c13<>6
  16. Hidden Pair: 6,9 in r79c5 => r79c5<>1, r7c5<>5, r79c5<>8
  17. Row 7 / Column 3 → 5 (Hidden Single)
  18. Row 3 / Column 3 → 2 (Naked Single)
  19. Row 2 / Column 2 → 5 (Hidden Single)
  20. Row 9 / Column 1 → 2 (Hidden Single)
  21. Locked Candidates Type 1 (Pointing): 2 in b2 => r1c7<>2
  22. Row 6 / Column 7 → 2 (Hidden Single)
  23. Row 4 / Column 4 → 2 (Hidden Single)
  24. Row 1 / Column 5 → 2 (Hidden Single)
  25. Locked Candidates Type 1 (Pointing): 3 in b5 => r89c6<>3
  26. Locked Candidates Type 1 (Pointing): 1 in b8 => r46c6<>1
  27. Locked Candidates Type 1 (Pointing): 8 in b8 => r9c9<>8
  28. Hidden Rectangle: 1/2 in r2c89,r8c89 => r8c9<>1
  29. XY-Chain: 6 6- r1c3 -1- r1c7 -5- r1c4 -8- r9c4 -3- r8c4 -5- r8c6 -1- r8c2 -6 => r9c3<>6
  30. Row 1 / Column 3 → 6 (Hidden Single)
  31. Locked Candidates Type 1 (Pointing): 1 in b1 => r67c1<>1
  32. Locked Candidates Type 2 (Claiming): 1 in r7 => r8c8,r9c79<>1
  33. Naked Triple: 1,3,8 in r9c346 => r9c79<>3
  34. W-Wing: 8/1 in r4c2,r9c6 connected by 1 in r8c26 => r4c6<>8
  35. Row 4 / Column 6 → 3 (Naked Single)
  36. Finned X-Wing: 3 r67 c19 fr7c7 fr7c8 => r8c9<>3
  37. XYZ-Wing: 2/3/6 in r38c8,r8c9 => r7c8<>6
  38. XY-Chain: 2 2- r2c8 -1- r4c8 -8- r4c2 -1- r8c2 -6- r8c9 -2 => r2c9,r8c8<>2
  39. Row 2 / Column 8 → 2 (Hidden Single)
  40. Row 8 / Column 9 → 2 (Hidden Single)
  41. Naked Pair: 3,6 in r38c8 => r7c8<>3
  42. Simple Colors Trap: 3 (r3c8,r6c1,r8c4,r9c3) / (r5c3,r6c9,r7c1,r8c8,r9c4) => r3c9<>3
  43. Sue de Coq: r23c9 - {1456} (r9c9 - {46}, r1c7 - {15}) => r3c7<>5, r7c9<>6
  44. 2-String Kite: 5 in r3c5,r5c7 (connected by r1c7,r3c9) => r5c5<>5
  45. Locked Candidates Type 1 (Pointing): 5 in b5 => r6c9<>5
  46. W-Wing: 8/1 in r5c5,r9c6 connected by 1 in r59c3 => r6c6<>8
  47. Row 6 / Column 6 → 5 (Naked Single)
  48. Row 8 / Column 6 → 1 (Naked Single)
  49. Row 9 / Column 6 → 8 (Full House)
  50. Row 8 / Column 2 → 6 (Naked Single)
  51. Row 9 / Column 4 → 3 (Naked Single)
  52. Row 7 / Column 1 → 3 (Naked Single)
  53. Row 9 / Column 3 → 1 (Full House)
  54. Row 5 / Column 3 → 3 (Full House)
  55. Row 8 / Column 8 → 3 (Naked Single)
  56. Row 8 / Column 4 → 5 (Full House)
  57. Row 1 / Column 4 → 8 (Full House)
  58. Row 3 / Column 5 → 5 (Full House)
  59. Row 6 / Column 1 → 6 (Naked Single)
  60. Row 3 / Column 8 → 6 (Naked Single)
  61. Row 1 / Column 1 → 1 (Naked Single)
  62. Row 1 / Column 7 → 5 (Full House)
  63. Row 3 / Column 9 → 4 (Naked Single)
  64. Row 2 / Column 1 → 4 (Naked Single)
  65. Row 2 / Column 9 → 1 (Full House)
  66. Row 3 / Column 1 → 8 (Full House)
  67. Row 3 / Column 7 → 3 (Full House)
  68. Row 5 / Column 7 → 1 (Naked Single)
  69. Row 9 / Column 9 → 6 (Naked Single)
  70. Row 7 / Column 9 → 8 (Naked Single)
  71. Row 4 / Column 8 → 8 (Naked Single)
  72. Row 7 / Column 8 → 1 (Full House)
  73. Row 4 / Column 2 → 1 (Full House)
  74. Row 6 / Column 2 → 8 (Full House)
  75. Row 5 / Column 5 → 8 (Naked Single)
  76. Row 5 / Column 9 → 5 (Full House)
  77. Row 6 / Column 9 → 3 (Full House)
  78. Row 6 / Column 5 → 1 (Full House)
  79. Row 7 / Column 7 → 9 (Naked Single)
  80. Row 7 / Column 5 → 6 (Full House)
  81. Row 9 / Column 5 → 9 (Full House)
  82. Row 9 / Column 7 → 4 (Full House)
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