Solution for Hard Sudoku #2142936517898

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

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

Solution Steps:

  1. Row 6 / Column 9 → 3 (Naked Single)
  2. Row 6 / Column 8 → 4 (Naked Single)
  3. Row 6 / Column 4 → 6 (Naked Single)
  4. Row 6 / Column 7 → 9 (Naked Single)
  5. Row 6 / Column 3 → 7 (Full House)
  6. Row 5 / Column 6 → 7 (Hidden Single)
  7. Row 7 / Column 4 → 4 (Hidden Single)
  8. Row 8 / Column 2 → 8 (Hidden Single)
  9. Row 5 / Column 5 → 4 (Hidden Single)
  10. Row 1 / Column 7 → 4 (Hidden Single)
  11. Row 4 / Column 3 → 4 (Hidden Single)
  12. Row 3 / Column 7 → 6 (Hidden Single)
  13. Row 1 / Column 2 → 7 (Hidden Single)
  14. Row 9 / Column 1 → 7 (Hidden Single)
  15. Row 3 / Column 9 → 7 (Hidden Single)
  16. Row 8 / Column 7 → 7 (Hidden Single)
  17. Locked Candidates Type 1 (Pointing): 8 in b2 => r1c8<>8
  18. Locked Candidates Type 1 (Pointing): 3 in b7 => r5c3<>3
  19. Locked Candidates Type 1 (Pointing): 5 in b9 => r9c23<>5
  20. Locked Candidates Type 2 (Claiming): 2 in r7 => r89c3,r9c2<>2
  21. 2-String Kite: 1 in r4c7,r9c4 (connected by r4c6,r5c4) => r9c7<>1
  22. Turbot Fish: 1 r5c4 =1= r9c4 -1- r9c8 =1= r8c9 => r5c9<>1
  23. XY-Wing: 1/2/5 in r18c9,r9c7 => r2c7<>5
  24. XY-Wing: 3/5/1 in r4c16,r7c1 => r7c6<>1
  25. Row 7 / Column 6 → 9 (Naked Single)
  26. Row 1 / Column 5 → 9 (Hidden Single)
  27. Row 1 / Column 3 → 6 (Hidden Single)
  28. Row 2 / Column 5 → 6 (Hidden Single)
  29. Row 5 / Column 1 → 6 (Hidden Single)
  30. Row 9 / Column 2 → 6 (Hidden Single)
  31. Row 3 / Column 4 → 2 (Hidden Single)
  32. Row 5 / Column 4 → 3 (Hidden Single)
  33. Row 4 / Column 6 → 1 (Full House)
  34. Row 1 / Column 4 → 8 (Naked Single)
  35. Row 9 / Column 4 → 1 (Full House)
  36. Row 4 / Column 1 → 3 (Hidden Single)
  37. Row 9 / Column 3 → 9 (Hidden Single)
  38. Row 5 / Column 2 → 9 (Hidden Single)
  39. Row 9 / Column 6 → 8 (Hidden Single)
  40. Row 8 / Column 9 → 1 (Hidden Single)
  41. Row 1 / Column 9 → 5 (Naked Single)
  42. Row 5 / Column 9 → 2 (Full House)
  43. Row 8 / Column 3 → 3 (Naked Single)
  44. Row 8 / Column 5 → 2 (Full House)
  45. Row 9 / Column 5 → 3 (Full House)
  46. Row 1 / Column 6 → 3 (Naked Single)
  47. Row 1 / Column 8 → 1 (Full House)
  48. Row 3 / Column 6 → 5 (Full House)
  49. Row 3 / Column 8 → 3 (Full House)
  50. Row 4 / Column 7 → 5 (Naked Single)
  51. Row 4 / Column 2 → 2 (Full House)
  52. Row 5 / Column 3 → 5 (Full House)
  53. Row 7 / Column 2 → 5 (Full House)
  54. Row 5 / Column 8 → 8 (Naked Single)
  55. Row 5 / Column 7 → 1 (Full House)
  56. Row 9 / Column 7 → 2 (Naked Single)
  57. Row 2 / Column 7 → 8 (Full House)
  58. Row 2 / Column 8 → 2 (Full House)
  59. Row 9 / Column 8 → 5 (Full House)
  60. Row 2 / Column 3 → 1 (Naked Single)
  61. Row 2 / Column 1 → 5 (Full House)
  62. Row 7 / Column 1 → 1 (Full House)
  63. Row 7 / Column 3 → 2 (Full House)
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