Solution for Hard Sudoku #147713524895

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

This Sudoku Puzzle has 57 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Triple, Naked Single, Full House techniques.

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

Solution Steps:

  1. Row 5 / Column 1 → 7 (Hidden Single)
  2. Row 2 / Column 9 → 8 (Hidden Single)
  3. Row 1 / Column 1 → 9 (Hidden Single)
  4. Row 7 / Column 5 → 2 (Hidden Single)
  5. Row 8 / Column 1 → 8 (Hidden Single)
  6. Row 2 / Column 7 → 3 (Hidden Single)
  7. Locked Candidates Type 1 (Pointing): 5 in b3 => r3c24<>5
  8. Locked Candidates Type 1 (Pointing): 6 in b5 => r5c23789<>6
  9. Locked Candidates Type 1 (Pointing): 8 in b5 => r5c28<>8
  10. Locked Candidates Type 1 (Pointing): 9 in b5 => r5c789<>9
  11. Row 3 / Column 7 → 9 (Hidden Single)
  12. Locked Triple: 2,3,4 in r5c789 => r4c9,r5c23<>2, r5c23,r6c89<>3, r5c23,r6c78<>4
  13. Row 5 / Column 2 → 1 (Naked Single)
  14. Row 5 / Column 3 → 1 (Naked Single)
  15. Row 6 / Column 7 → 6 (Naked Single)
  16. Row 1 / Column 7 → 2 (Naked Single)
  17. Row 8 / Column 7 → 4 (Full House)
  18. Row 5 / Column 7 → 4 (Full House)
  19. Row 6 / Column 9 → 5 (Naked Single)
  20. Row 5 / Column 8 → 3 (Naked Single)
  21. Row 3 / Column 9 → 6 (Naked Single)
  22. Row 3 / Column 8 → 5 (Full House)
  23. Row 4 / Column 9 → 9 (Naked Single)
  24. Row 6 / Column 1 → 4 (Naked Single)
  25. Row 6 / Column 8 → 8 (Naked Single)
  26. Row 6 / Column 2 → 3 (Full House)
  27. Row 5 / Column 9 → 2 (Naked Single)
  28. Row 3 / Column 4 → 2 (Naked Single)
  29. Row 3 / Column 5 → 4 (Full House)
  30. Row 3 / Column 2 → 4 (Full House)
  31. Row 4 / Column 8 → 8 (Naked Single)
  32. Row 9 / Column 9 → 1 (Naked Single)
  33. Row 8 / Column 9 → 3 (Full House)
  34. Row 2 / Column 1 → 1 (Hidden Single)
  35. Row 7 / Column 3 → 3 (Hidden Single)
  36. Row 2 / Column 3 → 2 (Hidden Single)
  37. Row 4 / Column 2 → 2 (Hidden Single)
  38. Row 7 / Column 6 → 4 (Hidden Single)
  39. Row 9 / Column 3 → 4 (Hidden Single)
  40. Row 8 / Column 4 → 1 (Hidden Single)
  41. Row 1 / Column 2 → 5 (Hidden Single)
  42. Row 7 / Column 2 → 6 (Naked Single)
  43. Row 7 / Column 1 → 5 (Full House)
  44. Row 7 / Column 8 → 9 (Full House)
  45. Row 8 / Column 3 → 5 (Full House)
  46. Row 4 / Column 1 → 6 (Full House)
  47. Row 9 / Column 8 → 6 (Full House)
  48. Row 4 / Column 3 → 6 (Naked Single)
  49. Row 8 / Column 6 → 6 (Naked Single)
  50. Row 9 / Column 5 → 8 (Naked Single)
  51. Row 1 / Column 5 → 6 (Full House)
  52. Row 1 / Column 6 → 8 (Full House)
  53. Row 2 / Column 6 → 5 (Full House)
  54. Row 9 / Column 4 → 9 (Full House)
  55. Row 2 / Column 4 → 5 (Full House)
  56. Row 5 / Column 6 → 9 (Full House)
  57. Row 5 / Column 4 → 6 (Hidden Single)
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