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

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

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

Solution Steps:

  1. Row 8 / Column 2 → 1 (Hidden Single)
  2. Row 8 / Column 1 → 2 (Hidden Single)
  3. Row 4 / Column 2 → 6 (Hidden Single)
  4. Row 3 / Column 3 → 2 (Hidden Single)
  5. Row 8 / Column 8 → 6 (Hidden Single)
  6. Row 6 / Column 2 → 2 (Hidden Single)
  7. Row 1 / Column 3 → 1 (Hidden Single)
  8. Row 7 / Column 3 → 6 (Hidden Single)
  9. Locked Candidates Type 1 (Pointing): 5 in b2 => r6c6<>5
  10. Locked Candidates Type 1 (Pointing): 7 in b6 => r6c146<>7
  11. Locked Candidates Type 1 (Pointing): 8 in b6 => r6c146<>8
  12. Row 6 / Column 6 → 4 (Naked Single)
  13. Row 5 / Column 1 → 8 (Hidden Single)
  14. Row 7 / Column 4 → 4 (Hidden Single)
  15. Row 5 / Column 2 → 4 (Hidden Single)
  16. Row 9 / Column 1 → 4 (Hidden Single)
  17. Row 4 / Column 4 → 8 (Hidden Single)
  18. Locked Candidates Type 1 (Pointing): 7 in b4 => r9c3<>7
  19. Skyscraper: 9 in r7c1,r8c4 (connected by r6c14) => r7c5<>9
  20. X-Wing: 9 c35 r49 => r9c79<>9
  21. Turbot Fish: 7 r2c8 =7= r2c2 -7- r9c2 =7= r7c1 => r7c8<>7
  22. XYZ-Wing: 7/8/9 in r67c7,r8c9 => r9c7<>7
  23. Hidden Rectangle: 4/7 in r1c58,r3c58 => r1c8<>7
  24. Hidden Rectangle: 2/7 in r4c56,r7c56 => r7c5<>7
  25. Multi Colors 1: 7 (r2c2,r7c1) / (r2c8,r9c2), (r6c7) / (r6c8) => r7c7<>7
  26. Locked Candidates Type 1 (Pointing): 7 in b9 => r13c9<>7
  27. XY-Chain: 2 2- r4c6 -7- r5c4 -5- r6c4 -9- r8c4 -7- r8c9 -9- r7c7 -8- r7c5 -2 => r4c5,r7c6<>2
  28. Row 4 / Column 6 → 2 (Hidden Single)
  29. Row 7 / Column 5 → 2 (Hidden Single)
  30. XY-Wing: 7/8/9 in r7c67,r8c4 => r8c9<>9
  31. Row 8 / Column 9 → 7 (Naked Single)
  32. Row 8 / Column 4 → 9 (Full House)
  33. Row 6 / Column 4 → 5 (Naked Single)
  34. Row 5 / Column 4 → 7 (Full House)
  35. Row 4 / Column 5 → 9 (Full House)
  36. Row 5 / Column 3 → 5 (Full House)
  37. Row 4 / Column 3 → 7 (Full House)
  38. Row 6 / Column 1 → 9 (Full House)
  39. Row 9 / Column 3 → 9 (Full House)
  40. Naked Pair: 3,5 in r19c9 => r37c9<>5
  41. Remote Pair: 5/7 r2c8 -7- r2c2 -5- r9c2 -7- r7c1 => r7c8<>5
  42. Row 7 / Column 1 → 5 (Hidden Single)
  43. Row 9 / Column 2 → 7 (Full House)
  44. Row 2 / Column 2 → 5 (Full House)
  45. Row 2 / Column 8 → 7 (Full House)
  46. Row 9 / Column 5 → 8 (Naked Single)
  47. Row 7 / Column 6 → 7 (Full House)
  48. Row 6 / Column 8 → 8 (Naked Single)
  49. Row 6 / Column 7 → 7 (Full House)
  50. Row 9 / Column 7 → 3 (Naked Single)
  51. Row 9 / Column 9 → 5 (Full House)
  52. Row 3 / Column 6 → 5 (Naked Single)
  53. Row 1 / Column 6 → 8 (Full House)
  54. Row 7 / Column 8 → 1 (Naked Single)
  55. Row 1 / Column 7 → 6 (Naked Single)
  56. Row 1 / Column 9 → 3 (Naked Single)
  57. Row 3 / Column 8 → 4 (Naked Single)
  58. Row 1 / Column 8 → 5 (Full House)
  59. Row 7 / Column 9 → 9 (Naked Single)
  60. Row 3 / Column 9 → 1 (Full House)
  61. Row 3 / Column 7 → 9 (Full House)
  62. Row 7 / Column 7 → 8 (Full House)
  63. Row 1 / Column 1 → 7 (Naked Single)
  64. Row 1 / Column 5 → 4 (Full House)
  65. Row 3 / Column 5 → 7 (Full House)
  66. Row 3 / Column 1 → 6 (Full House)
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