Solution for Hard Sudoku #3184237569198

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

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 1 → 3 (Naked Single)
  2. Row 4 / Column 2 → 8 (Naked Single)
  3. Row 4 / Column 3 → 2 (Naked Single)
  4. Row 4 / Column 6 → 7 (Naked Single)
  5. Row 4 / Column 7 → 9 (Full House)
  6. Row 2 / Column 8 → 1 (Hidden Single)
  7. Row 3 / Column 6 → 8 (Hidden Single)
  8. Row 5 / Column 5 → 8 (Hidden Single)
  9. Row 5 / Column 4 → 9 (Hidden Single)
  10. Row 6 / Column 7 → 8 (Hidden Single)
  11. Row 9 / Column 3 → 8 (Hidden Single)
  12. Row 7 / Column 3 → 7 (Hidden Single)
  13. Row 1 / Column 9 → 9 (Hidden Single)
  14. Row 9 / Column 8 → 9 (Hidden Single)
  15. Row 7 / Column 1 → 9 (Hidden Single)
  16. Row 2 / Column 3 → 9 (Hidden Single)
  17. Locked Candidates Type 1 (Pointing): 5 in b1 => r1c78<>5
  18. Locked Candidates Type 1 (Pointing): 3 in b3 => r5c7<>3
  19. Locked Candidates Type 1 (Pointing): 1 in b8 => r9c2<>1
  20. Locked Candidates Type 2 (Claiming): 4 in r3 => r1c78,r2c7<>4
  21. 2-String Kite: 6 in r1c6,r6c3 (connected by r5c6,r6c4) => r1c3<>6
  22. Turbot Fish: 6 r2c1 =6= r1c2 -6- r1c6 =6= r5c6 => r5c1<>6
  23. XY-Wing: 4/6/5 in r1c3,r29c1 => r8c3<>5
  24. XY-Wing: 3/5/6 in r36c9,r6c4 => r3c4<>6
  25. Row 3 / Column 4 → 2 (Naked Single)
  26. Row 9 / Column 5 → 2 (Hidden Single)
  27. Row 9 / Column 7 → 7 (Hidden Single)
  28. Row 8 / Column 5 → 7 (Hidden Single)
  29. Row 1 / Column 8 → 7 (Hidden Single)
  30. Row 5 / Column 9 → 7 (Hidden Single)
  31. Row 7 / Column 6 → 4 (Hidden Single)
  32. Row 1 / Column 7 → 2 (Hidden Single)
  33. Row 5 / Column 8 → 2 (Hidden Single)
  34. Row 5 / Column 6 → 3 (Hidden Single)
  35. Row 6 / Column 4 → 6 (Full House)
  36. Row 9 / Column 6 → 1 (Naked Single)
  37. Row 1 / Column 6 → 6 (Full House)
  38. Row 6 / Column 9 → 3 (Hidden Single)
  39. Row 2 / Column 7 → 3 (Hidden Single)
  40. Row 2 / Column 5 → 4 (Naked Single)
  41. Row 1 / Column 5 → 3 (Full House)
  42. Row 2 / Column 1 → 6 (Full House)
  43. Row 1 / Column 4 → 1 (Full House)
  44. Row 9 / Column 1 → 5 (Naked Single)
  45. Row 5 / Column 1 → 4 (Full House)
  46. Row 7 / Column 2 → 3 (Naked Single)
  47. Row 7 / Column 4 → 5 (Full House)
  48. Row 9 / Column 4 → 3 (Full House)
  49. Row 9 / Column 2 → 6 (Full House)
  50. Row 5 / Column 7 → 5 (Naked Single)
  51. Row 6 / Column 8 → 4 (Full House)
  52. Row 6 / Column 3 → 5 (Full House)
  53. Row 3 / Column 8 → 5 (Full House)
  54. Row 5 / Column 2 → 1 (Naked Single)
  55. Row 5 / Column 3 → 6 (Full House)
  56. Row 8 / Column 7 → 6 (Naked Single)
  57. Row 3 / Column 7 → 4 (Full House)
  58. Row 3 / Column 9 → 6 (Full House)
  59. Row 8 / Column 9 → 5 (Full House)
  60. Row 1 / Column 3 → 4 (Naked Single)
  61. Row 1 / Column 2 → 5 (Full House)
  62. Row 8 / Column 2 → 4 (Full House)
  63. Row 8 / Column 3 → 1 (Full House)
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