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

This Sudoku Puzzle has 68 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Pair, undefined techniques.

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

Solution Steps:

  1. Row 3 / Column 6 → 9 (Naked Single)
  2. Row 5 / Column 2 → 6 (Hidden Single)
  3. Row 5 / Column 8 → 2 (Hidden Single)
  4. Row 6 / Column 4 → 8 (Hidden Single)
  5. Row 6 / Column 9 → 6 (Hidden Single)
  6. Row 1 / Column 2 → 9 (Hidden Single)
  7. Row 8 / Column 5 → 9 (Hidden Single)
  8. Row 7 / Column 6 → 5 (Hidden Single)
  9. Row 5 / Column 6 → 1 (Naked Single)
  10. Row 5 / Column 4 → 3 (Naked Single)
  11. Row 5 / Column 5 → 5 (Full House)
  12. Row 9 / Column 6 → 8 (Hidden Single)
  13. Locked Candidates Type 1 (Pointing): 2 in b3 => r1c4<>2
  14. Locked Candidates Type 1 (Pointing): 5 in b3 => r1c3<>5
  15. Locked Candidates Type 1 (Pointing): 4 in b5 => r29c5<>4
  16. Locked Candidates Type 1 (Pointing): 7 in b5 => r29c5<>7
  17. Row 9 / Column 4 → 7 (Hidden Single)
  18. Row 9 / Column 2 → 4 (Hidden Single)
  19. Row 7 / Column 4 → 4 (Hidden Single)
  20. Naked Triple: 1,3,9 in r246c7 => r1c7<>3, r8c7<>1
  21. Locked Candidates Type 1 (Pointing): 1 in b9 => r6c8<>1
  22. Hidden Pair: 2,5 in r1c79 => r1c9<>3, r1c9<>7
  23. W-Wing: 7/3 in r1c8,r4c9 connected by 3 in r9c89 => r2c9,r6c8<>7
  24. Row 2 / Column 6 → 7 (Hidden Single)
  25. Row 1 / Column 6 → 4 (Full House)
  26. Row 4 / Column 9 → 7 (Hidden Single)
  27. Row 4 / Column 5 → 4 (Naked Single)
  28. Row 6 / Column 5 → 7 (Full House)
  29. Row 1 / Column 8 → 7 (Hidden Single)
  30. Row 1 / Column 1 → 3 (Hidden Single)
  31. Row 8 / Column 1 → 6 (Hidden Single)
  32. X-Wing: 1 r18 c34 => r246c3<>1
  33. 2-String Kite: 8 in r3c8,r8c3 (connected by r7c8,r8c9) => r3c3<>8
  34. W-Wing: 1/3 in r2c5,r9c8 connected by 3 in r3c58 => r9c5<>1
  35. Row 9 / Column 5 → 2 (Naked Single)
  36. Row 8 / Column 4 → 1 (Full House)
  37. Row 3 / Column 5 → 3 (Naked Single)
  38. Row 2 / Column 5 → 1 (Full House)
  39. Row 9 / Column 9 → 3 (Naked Single)
  40. Row 9 / Column 8 → 1 (Full House)
  41. Row 1 / Column 4 → 6 (Naked Single)
  42. Row 3 / Column 4 → 2 (Full House)
  43. Row 3 / Column 8 → 8 (Naked Single)
  44. Row 1 / Column 3 → 1 (Naked Single)
  45. Row 2 / Column 9 → 9 (Naked Single)
  46. Row 3 / Column 2 → 5 (Naked Single)
  47. Row 3 / Column 3 → 6 (Full House)
  48. Row 7 / Column 8 → 9 (Naked Single)
  49. Row 6 / Column 8 → 3 (Full House)
  50. Row 2 / Column 7 → 3 (Naked Single)
  51. Row 4 / Column 7 → 1 (Naked Single)
  52. Row 6 / Column 7 → 9 (Full House)
  53. Row 6 / Column 2 → 1 (Naked Single)
  54. Row 6 / Column 1 → 4 (Naked Single)
  55. Row 6 / Column 3 → 5 (Full House)
  56. Row 7 / Column 2 → 8 (Naked Single)
  57. Row 4 / Column 2 → 3 (Full House)
  58. Row 2 / Column 1 → 8 (Naked Single)
  59. Row 2 / Column 3 → 4 (Full House)
  60. Row 7 / Column 9 → 2 (Naked Single)
  61. Row 7 / Column 1 → 1 (Full House)
  62. Row 8 / Column 3 → 2 (Full House)
  63. Row 4 / Column 1 → 2 (Full House)
  64. Row 4 / Column 3 → 8 (Full House)
  65. Row 1 / Column 9 → 5 (Naked Single)
  66. Row 1 / Column 7 → 2 (Full House)
  67. Row 8 / Column 7 → 5 (Full House)
  68. Row 8 / Column 9 → 8 (Full House)
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