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

This Sudoku Puzzle has 66 steps and it is solved using Hidden Single, Naked Single, Locked Candidates Type 1 (Pointing), Naked Triple, Hidden Pair, undefined, Full House, Locked Pair, Skyscraper techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 4 / Column 8 → 2 (Hidden Single)
  2. Row 6 / Column 3 → 2 (Hidden Single)
  3. Row 7 / Column 3 → 8 (Naked Single)
  4. Row 9 / Column 3 → 4 (Naked Single)
  5. Row 2 / Column 1 → 5 (Hidden Single)
  6. Row 9 / Column 9 → 5 (Hidden Single)
  7. Row 5 / Column 3 → 5 (Hidden Single)
  8. Row 9 / Column 6 → 8 (Hidden Single)
  9. Locked Candidates Type 1 (Pointing): 3 in b4 => r3c2<>3
  10. Locked Candidates Type 1 (Pointing): 1 in b5 => r6c79<>1
  11. Locked Candidates Type 1 (Pointing): 9 in b6 => r6c456<>9
  12. Naked Triple: 2,6,9 in r2c469 => r2c28<>6, r2c8<>9
  13. Hidden Pair: 1,5 in r68c6 => r6c6<>3, r68c6<>6, r8c6<>2
  14. 2-String Kite: 8 in r1c7,r6c2 (connected by r1c1,r2c2) => r6c7<>8
  15. X-Wing: 8 r26 c28 => r5c8<>8
  16. W-Wing: 6/4 in r3c2,r8c8 connected by 4 in r2c28 => r8c2<>6
  17. Row 8 / Column 2 → 7 (Naked Single)
  18. Row 4 / Column 2 → 3 (Naked Single)
  19. Row 4 / Column 6 → 9 (Naked Single)
  20. Row 4 / Column 4 → 7 (Full House)
  21. Row 6 / Column 2 → 8 (Naked Single)
  22. Row 5 / Column 1 → 7 (Full House)
  23. Row 2 / Column 2 → 4 (Naked Single)
  24. Row 3 / Column 2 → 6 (Full House)
  25. Row 2 / Column 8 → 8 (Naked Single)
  26. Row 3 / Column 1 → 9 (Naked Single)
  27. Row 1 / Column 1 → 8 (Naked Single)
  28. Row 5 / Column 7 → 8 (Hidden Single)
  29. Row 8 / Column 8 → 4 (Hidden Single)
  30. Row 5 / Column 9 → 1 (Hidden Single)
  31. Row 3 / Column 9 → 2 (Naked Single)
  32. Row 2 / Column 6 → 2 (Hidden Single)
  33. Locked Pair: 6,9 in r12c9 => r1c7,r67c9<>6, r1c7,r67c9<>9
  34. Skyscraper: 3 in r7c9,r9c4 (connected by r6c49) => r7c56,r9c8<>3
  35. Row 7 / Column 6 → 6 (Naked Single)
  36. Row 1 / Column 6 → 3 (Naked Single)
  37. Row 7 / Column 1 → 2 (Naked Single)
  38. Row 9 / Column 1 → 6 (Full House)
  39. Row 8 / Column 4 → 1 (Naked Single)
  40. Row 1 / Column 3 → 1 (Naked Single)
  41. Row 3 / Column 3 → 3 (Full House)
  42. Row 3 / Column 5 → 4 (Naked Single)
  43. Row 3 / Column 7 → 1 (Full House)
  44. Row 9 / Column 8 → 9 (Naked Single)
  45. Row 8 / Column 6 → 5 (Naked Single)
  46. Row 6 / Column 6 → 1 (Full House)
  47. Row 1 / Column 7 → 4 (Naked Single)
  48. Row 7 / Column 7 → 7 (Naked Single)
  49. Row 9 / Column 4 → 3 (Naked Single)
  50. Row 8 / Column 5 → 2 (Naked Single)
  51. Row 8 / Column 7 → 6 (Full House)
  52. Row 7 / Column 5 → 9 (Naked Single)
  53. Row 7 / Column 9 → 3 (Full House)
  54. Row 9 / Column 7 → 2 (Full House)
  55. Row 9 / Column 5 → 7 (Full House)
  56. Row 6 / Column 7 → 9 (Full House)
  57. Row 6 / Column 4 → 6 (Naked Single)
  58. Row 2 / Column 4 → 9 (Full House)
  59. Row 1 / Column 5 → 6 (Full House)
  60. Row 2 / Column 9 → 6 (Full House)
  61. Row 1 / Column 9 → 9 (Full House)
  62. Row 6 / Column 9 → 7 (Full House)
  63. Row 5 / Column 5 → 3 (Naked Single)
  64. Row 5 / Column 8 → 6 (Full House)
  65. Row 6 / Column 8 → 3 (Full House)
  66. Row 6 / Column 5 → 5 (Full House)
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