Solution for Hard Sudoku #1142715398698

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

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 1 → 1 (Naked Single)
  2. Row 6 / Column 2 → 4 (Naked Single)
  3. Row 6 / Column 3 → 7 (Naked Single)
  4. Row 6 / Column 6 → 5 (Naked Single)
  5. Row 6 / Column 7 → 8 (Full House)
  6. Row 5 / Column 4 → 8 (Hidden Single)
  7. Row 8 / Column 8 → 6 (Hidden Single)
  8. Row 7 / Column 6 → 4 (Hidden Single)
  9. Row 5 / Column 5 → 4 (Hidden Single)
  10. Row 1 / Column 3 → 4 (Hidden Single)
  11. Row 4 / Column 7 → 4 (Hidden Single)
  12. Row 3 / Column 3 → 5 (Hidden Single)
  13. Row 1 / Column 8 → 8 (Hidden Single)
  14. Row 9 / Column 9 → 8 (Hidden Single)
  15. Row 3 / Column 1 → 8 (Hidden Single)
  16. Row 8 / Column 3 → 8 (Hidden Single)
  17. Locked Candidates Type 1 (Pointing): 6 in b2 => r1c2<>6
  18. Locked Candidates Type 1 (Pointing): 3 in b7 => r9c78<>3
  19. Locked Candidates Type 1 (Pointing): 1 in b9 => r5c7<>1
  20. Locked Candidates Type 2 (Claiming): 2 in r7 => r89c7,r9c8<>2
  21. 2-String Kite: 9 in r4c3,r9c6 (connected by r4c4,r5c6) => r9c3<>9
  22. Turbot Fish: 9 r5c6 =9= r9c6 -9- r9c2 =9= r8c1 => r5c1<>9
  23. XY-Wing: 2/9/3 in r18c1,r9c3 => r2c3<>3
  24. XY-Wing: 1/3/9 in r4c49,r7c9 => r7c4<>9
  25. Row 7 / Column 4 → 7 (Naked Single)
  26. Row 1 / Column 5 → 7 (Hidden Single)
  27. Row 1 / Column 7 → 5 (Hidden Single)
  28. Row 2 / Column 5 → 5 (Hidden Single)
  29. Row 5 / Column 9 → 5 (Hidden Single)
  30. Row 9 / Column 8 → 5 (Hidden Single)
  31. Row 3 / Column 6 → 2 (Hidden Single)
  32. Row 5 / Column 6 → 1 (Hidden Single)
  33. Row 4 / Column 4 → 9 (Full House)
  34. Row 1 / Column 6 → 6 (Naked Single)
  35. Row 9 / Column 6 → 9 (Full House)
  36. Row 4 / Column 9 → 1 (Hidden Single)
  37. Row 9 / Column 7 → 7 (Hidden Single)
  38. Row 5 / Column 8 → 7 (Hidden Single)
  39. Row 9 / Column 4 → 6 (Hidden Single)
  40. Row 8 / Column 1 → 9 (Hidden Single)
  41. Row 1 / Column 1 → 3 (Naked Single)
  42. Row 5 / Column 1 → 2 (Full House)
  43. Row 8 / Column 7 → 1 (Naked Single)
  44. Row 8 / Column 5 → 2 (Full House)
  45. Row 9 / Column 5 → 1 (Full House)
  46. Row 1 / Column 4 → 1 (Naked Single)
  47. Row 1 / Column 2 → 9 (Full House)
  48. Row 3 / Column 4 → 3 (Full House)
  49. Row 3 / Column 2 → 1 (Full House)
  50. Row 4 / Column 3 → 3 (Naked Single)
  51. Row 4 / Column 8 → 2 (Full House)
  52. Row 5 / Column 7 → 3 (Full House)
  53. Row 7 / Column 8 → 3 (Full House)
  54. Row 5 / Column 2 → 6 (Naked Single)
  55. Row 5 / Column 3 → 9 (Full House)
  56. Row 9 / Column 3 → 2 (Naked Single)
  57. Row 2 / Column 3 → 6 (Full House)
  58. Row 2 / Column 2 → 2 (Full House)
  59. Row 9 / Column 2 → 3 (Full House)
  60. Row 2 / Column 7 → 9 (Naked Single)
  61. Row 2 / Column 9 → 3 (Full House)
  62. Row 7 / Column 9 → 9 (Full House)
  63. Row 7 / Column 7 → 2 (Full House)
Show More...