Solution for Hard Sudoku #1328165794398

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

This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Turbot Fish techniques.

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Solution Steps:

  1. Row 4 / Column 9 → 6 (Naked Single)
  2. Row 4 / Column 8 → 2 (Naked Single)
  3. Row 4 / Column 4 → 5 (Naked Single)
  4. Row 4 / Column 7 → 1 (Naked Single)
  5. Row 4 / Column 3 → 4 (Full House)
  6. Row 2 / Column 2 → 3 (Hidden Single)
  7. Row 5 / Column 6 → 4 (Hidden Single)
  8. Row 3 / Column 4 → 2 (Hidden Single)
  9. Row 5 / Column 5 → 2 (Hidden Single)
  10. Row 6 / Column 3 → 2 (Hidden Single)
  11. Row 9 / Column 7 → 2 (Hidden Single)
  12. Row 7 / Column 7 → 5 (Hidden Single)
  13. Row 1 / Column 1 → 4 (Hidden Single)
  14. Row 9 / Column 2 → 4 (Hidden Single)
  15. Row 7 / Column 9 → 4 (Hidden Single)
  16. Row 2 / Column 7 → 4 (Hidden Single)
  17. Locked Candidates Type 1 (Pointing): 6 in b1 => r5c3<>6
  18. Locked Candidates Type 1 (Pointing): 7 in b3 => r1c23<>7
  19. Locked Candidates Type 1 (Pointing): 3 in b8 => r9c8<>3
  20. Locked Candidates Type 2 (Claiming): 8 in r3 => r1c23,r2c3<>8
  21. 2-String Kite: 9 in r1c4,r6c7 (connected by r5c4,r6c6) => r1c7<>9
  22. Turbot Fish: 9 r2c9 =9= r1c8 -9- r1c4 =9= r5c4 => r5c9<>9
  23. XY-Wing: 8/9/7 in r1c7,r29c9 => r8c7<>7
  24. XY-Wing: 6/7/9 in r36c1,r6c6 => r3c6<>9
  25. Row 3 / Column 6 → 1 (Naked Single)
  26. Row 9 / Column 5 → 1 (Hidden Single)
  27. Row 9 / Column 3 → 5 (Hidden Single)
  28. Row 8 / Column 5 → 5 (Hidden Single)
  29. Row 1 / Column 2 → 5 (Hidden Single)
  30. Row 5 / Column 1 → 5 (Hidden Single)
  31. Row 7 / Column 4 → 8 (Hidden Single)
  32. Row 1 / Column 3 → 1 (Hidden Single)
  33. Row 5 / Column 2 → 1 (Hidden Single)
  34. Row 5 / Column 4 → 6 (Hidden Single)
  35. Row 6 / Column 6 → 9 (Full House)
  36. Row 9 / Column 4 → 3 (Naked Single)
  37. Row 1 / Column 4 → 9 (Full House)
  38. Row 6 / Column 1 → 6 (Hidden Single)
  39. Row 2 / Column 3 → 6 (Hidden Single)
  40. Row 2 / Column 5 → 8 (Naked Single)
  41. Row 1 / Column 5 → 6 (Full House)
  42. Row 2 / Column 9 → 9 (Full House)
  43. Row 1 / Column 6 → 3 (Full House)
  44. Row 9 / Column 9 → 7 (Naked Single)
  45. Row 5 / Column 9 → 8 (Full House)
  46. Row 7 / Column 8 → 6 (Naked Single)
  47. Row 7 / Column 6 → 7 (Full House)
  48. Row 9 / Column 6 → 6 (Full House)
  49. Row 9 / Column 8 → 9 (Full House)
  50. Row 5 / Column 3 → 7 (Naked Single)
  51. Row 6 / Column 2 → 8 (Full House)
  52. Row 6 / Column 7 → 7 (Full House)
  53. Row 3 / Column 2 → 7 (Full House)
  54. Row 5 / Column 8 → 3 (Naked Single)
  55. Row 5 / Column 7 → 9 (Full House)
  56. Row 8 / Column 3 → 9 (Naked Single)
  57. Row 3 / Column 3 → 8 (Full House)
  58. Row 3 / Column 1 → 9 (Full House)
  59. Row 8 / Column 1 → 7 (Full House)
  60. Row 1 / Column 7 → 8 (Naked Single)
  61. Row 1 / Column 8 → 7 (Full House)
  62. Row 8 / Column 8 → 8 (Full House)
  63. Row 8 / Column 7 → 3 (Full House)
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