Solution for Hard Sudoku #2425486391798

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

This Sudoku Puzzle has 62 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.

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

Solution Steps:

  1. Row 9 / Column 4 → 8 (Naked Single)
  2. Row 8 / Column 4 → 2 (Naked Single)
  3. Row 4 / Column 4 → 6 (Naked Single)
  4. Row 7 / Column 4 → 4 (Naked Single)
  5. Row 3 / Column 4 → 1 (Full House)
  6. Row 6 / Column 5 → 1 (Hidden Single)
  7. Row 5 / Column 5 → 2 (Hidden Single)
  8. Row 4 / Column 3 → 2 (Hidden Single)
  9. Row 2 / Column 2 → 7 (Hidden Single)
  10. Row 7 / Column 9 → 2 (Hidden Single)
  11. Row 3 / Column 6 → 2 (Hidden Single)
  12. Row 7 / Column 7 → 6 (Hidden Single)
  13. Row 1 / Column 1 → 1 (Hidden Single)
  14. Row 2 / Column 9 → 1 (Hidden Single)
  15. Row 9 / Column 7 → 1 (Hidden Single)
  16. Row 7 / Column 2 → 1 (Hidden Single)
  17. Locked Candidates Type 1 (Pointing): 8 in b1 => r3c5<>8
  18. Locked Candidates Type 1 (Pointing): 7 in b6 => r8c9<>7
  19. Locked Candidates Type 1 (Pointing): 3 in b7 => r23c1<>3
  20. Locked Candidates Type 2 (Claiming): 5 in c3 => r23c1,r3c2<>5
  21. 2-String Kite: 9 in r4c1,r7c6 (connected by r4c5,r6c6) => r7c1<>9
  22. Turbot Fish: 9 r4c5 =9= r4c1 -9- r8c1 =9= r9c2 => r9c5<>9
  23. XY-Wing: 3/8/9 in r1c36,r6c6 => r6c3<>9
  24. Row 6 / Column 3 → 4 (Naked Single)
  25. Row 5 / Column 9 → 4 (Hidden Single)
  26. Row 5 / Column 8 → 6 (Hidden Single)
  27. Row 3 / Column 9 → 6 (Hidden Single)
  28. Row 1 / Column 5 → 6 (Hidden Single)
  29. Row 4 / Column 7 → 5 (Hidden Single)
  30. Row 2 / Column 1 → 6 (Hidden Single)
  31. Row 1 / Column 6 → 8 (Hidden Single)
  32. Row 6 / Column 6 → 9 (Naked Single)
  33. Row 4 / Column 5 → 8 (Full House)
  34. Row 4 / Column 9 → 7 (Naked Single)
  35. Row 4 / Column 1 → 9 (Full House)
  36. Row 2 / Column 5 → 4 (Hidden Single)
  37. Row 3 / Column 1 → 4 (Hidden Single)
  38. Row 6 / Column 1 → 7 (Hidden Single)
  39. Row 9 / Column 2 → 9 (Hidden Single)
  40. Row 3 / Column 2 → 8 (Naked Single)
  41. Row 5 / Column 2 → 5 (Full House)
  42. Row 5 / Column 1 → 8 (Full House)
  43. Row 9 / Column 9 → 3 (Naked Single)
  44. Row 9 / Column 5 → 5 (Full House)
  45. Row 6 / Column 9 → 8 (Naked Single)
  46. Row 6 / Column 7 → 3 (Full House)
  47. Row 8 / Column 7 → 8 (Full House)
  48. Row 8 / Column 9 → 9 (Full House)
  49. Row 3 / Column 5 → 3 (Naked Single)
  50. Row 2 / Column 6 → 5 (Full House)
  51. Row 7 / Column 6 → 3 (Full House)
  52. Row 2 / Column 3 → 3 (Full House)
  53. Row 3 / Column 8 → 9 (Naked Single)
  54. Row 1 / Column 8 → 3 (Full House)
  55. Row 1 / Column 3 → 9 (Full House)
  56. Row 3 / Column 3 → 5 (Full House)
  57. Row 8 / Column 5 → 7 (Naked Single)
  58. Row 7 / Column 5 → 9 (Full House)
  59. Row 7 / Column 1 → 5 (Naked Single)
  60. Row 7 / Column 8 → 7 (Full House)
  61. Row 8 / Column 8 → 5 (Full House)
  62. Row 8 / Column 1 → 3 (Full House)
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