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

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

Try To Solve This Puzzle

Solution Steps:

  1. Row 7 / Column 6 → 6 (Naked Single)
  2. Row 2 / Column 9 → 1 (Naked Single)
  3. Row 7 / Column 2 → 1 (Naked Single)
  4. Row 2 / Column 7 → 2 (Naked Single)
  5. Row 2 / Column 4 → 6 (Hidden Single)
  6. Row 5 / Column 8 → 8 (Hidden Single)
  7. Row 9 / Column 7 → 1 (Hidden Single)
  8. Row 9 / Column 8 → 6 (Hidden Single)
  9. Row 9 / Column 2 → 8 (Naked Single)
  10. Row 8 / Column 1 → 6 (Hidden Single)
  11. Row 4 / Column 2 → 6 (Hidden Single)
  12. Row 7 / Column 8 → 4 (Hidden Single)
  13. Row 7 / Column 4 → 9 (Full House)
  14. Row 6 / Column 7 → 6 (Hidden Single)
  15. Row 8 / Column 3 → 2 (Hidden Single)
  16. Row 3 / Column 1 → 4 (Hidden Single)
  17. Row 1 / Column 7 → 4 (Hidden Single)
  18. Row 3 / Column 8 → 9 (Hidden Single)
  19. Row 1 / Column 8 → 5 (Full House)
  20. Row 1 / Column 5 → 9 (Hidden Single)
  21. Row 5 / Column 1 → 2 (Hidden Single)
  22. Locked Candidates Type 1 (Pointing): 5 in b1 => r2c5<>5
  23. Locked Candidates Type 1 (Pointing): 5 in b7 => r9c456<>5
  24. Locked Candidates Type 1 (Pointing): 3 in b9 => r8c45<>3
  25. Naked Pair: 3,7 in r5c26 => r5c347<>3, r5c47<>7
  26. Row 5 / Column 7 → 9 (Naked Single)
  27. Row 8 / Column 7 → 3 (Naked Single)
  28. Row 4 / Column 7 → 7 (Full House)
  29. Row 8 / Column 9 → 9 (Full House)
  30. Naked Pair: 3,7 in r59c6 => r134c6<>3, r1c6<>7
  31. Locked Candidates Type 1 (Pointing): 3 in b2 => r69c4<>3
  32. Skyscraper: 7 in r1c4,r5c6 (connected by r15c2) => r6c4<>7
  33. X-Wing: 7 r26 c15 => r9c5<>7
  34. W-Wing: 8/5 in r4c6,r8c4 connected by 5 in r3c46 => r6c4<>8
  35. Locked Pair: 1,4 in r56c4 => r46c5,r9c4<>4
  36. Row 9 / Column 4 → 7 (Naked Single)
  37. Row 9 / Column 6 → 3 (Naked Single)
  38. Row 5 / Column 6 → 7 (Naked Single)
  39. Row 9 / Column 5 → 4 (Naked Single)
  40. Row 5 / Column 2 → 3 (Naked Single)
  41. Row 3 / Column 2 → 2 (Naked Single)
  42. Row 1 / Column 2 → 7 (Full House)
  43. Row 3 / Column 6 → 5 (Naked Single)
  44. Row 3 / Column 4 → 3 (Full House)
  45. Row 4 / Column 6 → 8 (Naked Single)
  46. Row 1 / Column 6 → 2 (Full House)
  47. Row 1 / Column 4 → 8 (Naked Single)
  48. Row 1 / Column 3 → 3 (Full House)
  49. Row 2 / Column 5 → 7 (Full House)
  50. Row 4 / Column 1 → 9 (Naked Single)
  51. Row 6 / Column 5 → 3 (Naked Single)
  52. Row 8 / Column 4 → 5 (Naked Single)
  53. Row 8 / Column 5 → 8 (Full House)
  54. Row 4 / Column 5 → 5 (Full House)
  55. Row 4 / Column 3 → 4 (Naked Single)
  56. Row 4 / Column 9 → 3 (Full House)
  57. Row 6 / Column 9 → 4 (Full House)
  58. Row 9 / Column 1 → 5 (Naked Single)
  59. Row 9 / Column 3 → 9 (Full House)
  60. Row 5 / Column 3 → 1 (Naked Single)
  61. Row 5 / Column 4 → 4 (Full House)
  62. Row 6 / Column 4 → 1 (Full House)
  63. Row 2 / Column 1 → 8 (Naked Single)
  64. Row 2 / Column 3 → 5 (Full House)
  65. Row 6 / Column 3 → 8 (Full House)
  66. Row 6 / Column 1 → 7 (Full House)
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