Solution for Medium Sudoku #31517943862103

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

This Sudoku Puzzle has 66 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked 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 3 / Column 4 → 4 (Hidden Single)
  2. Row 5 / Column 8 → 4 (Hidden Single)
  3. Row 4 / Column 7 → 9 (Hidden Single)
  4. Row 6 / Column 5 → 8 (Hidden Single)
  5. Row 9 / Column 5 → 4 (Hidden Single)
  6. Row 7 / Column 3 → 4 (Hidden Single)
  7. Row 2 / Column 4 → 6 (Hidden Single)
  8. Row 6 / Column 7 → 2 (Hidden Single)
  9. Row 5 / Column 9 → 6 (Hidden Single)
  10. Row 6 / Column 3 → 3 (Hidden Single)
  11. Row 4 / Column 5 → 3 (Hidden Single)
  12. Row 3 / Column 7 → 6 (Hidden Single)
  13. Row 8 / Column 8 → 6 (Hidden Single)
  14. Locked Candidates Type 1 (Pointing): 2 in b1 => r3c6<>2
  15. Locked Candidates Type 1 (Pointing): 2 in b5 => r5c1<>2
  16. Locked Candidates Type 1 (Pointing): 5 in b5 => r5c2<>5
  17. Locked Candidates Type 1 (Pointing): 8 in b9 => r7c1246<>8
  18. Locked Candidates Type 1 (Pointing): 8 in b7 => r9c46<>8
  19. Naked Triple: 1,5,7 in r7c2,r89c3 => r79c1,r9c2<>1, r7c1<>7, r9c2<>5
  20. Row 7 / Column 1 → 9 (Naked Single)
  21. Row 1 / Column 8 → 9 (Hidden Single)
  22. Row 8 / Column 9 → 9 (Hidden Single)
  23. Locked Candidates Type 1 (Pointing): 1 in b9 => r7c26<>1
  24. Locked Candidates Type 1 (Pointing): 1 in b7 => r3c3<>1
  25. Locked Candidates Type 1 (Pointing): 5 in b9 => r7c246<>5
  26. Row 7 / Column 2 → 7 (Naked Single)
  27. Row 5 / Column 2 → 1 (Naked Single)
  28. Row 5 / Column 1 → 7 (Naked Single)
  29. Row 4 / Column 2 → 5 (Hidden Single)
  30. Row 4 / Column 3 → 2 (Naked Single)
  31. Row 4 / Column 1 → 6 (Full House)
  32. Row 3 / Column 3 → 7 (Naked Single)
  33. Row 9 / Column 1 → 8 (Naked Single)
  34. Row 2 / Column 1 → 1 (Naked Single)
  35. Row 3 / Column 1 → 2 (Full House)
  36. Row 9 / Column 2 → 6 (Naked Single)
  37. Row 6 / Column 8 → 7 (Hidden Single)
  38. Row 6 / Column 9 → 5 (Full House)
  39. Row 7 / Column 9 → 1 (Naked Single)
  40. Row 3 / Column 9 → 3 (Naked Single)
  41. Row 1 / Column 9 → 7 (Full House)
  42. Row 3 / Column 2 → 8 (Naked Single)
  43. Row 2 / Column 2 → 3 (Full House)
  44. Row 3 / Column 8 → 5 (Naked Single)
  45. Row 3 / Column 6 → 1 (Full House)
  46. Row 7 / Column 8 → 8 (Full House)
  47. Row 7 / Column 7 → 5 (Full House)
  48. Row 2 / Column 7 → 8 (Naked Single)
  49. Row 1 / Column 7 → 1 (Full House)
  50. Row 1 / Column 5 → 2 (Naked Single)
  51. Row 5 / Column 5 → 5 (Naked Single)
  52. Row 2 / Column 5 → 7 (Naked Single)
  53. Row 2 / Column 6 → 5 (Full House)
  54. Row 8 / Column 5 → 1 (Full House)
  55. Row 9 / Column 6 → 9 (Naked Single)
  56. Row 8 / Column 3 → 5 (Naked Single)
  57. Row 9 / Column 3 → 1 (Full House)
  58. Row 9 / Column 4 → 5 (Full House)
  59. Row 5 / Column 6 → 2 (Naked Single)
  60. Row 5 / Column 4 → 9 (Full House)
  61. Row 8 / Column 4 → 8 (Naked Single)
  62. Row 8 / Column 6 → 7 (Full House)
  63. Row 7 / Column 6 → 3 (Naked Single)
  64. Row 1 / Column 6 → 8 (Full House)
  65. Row 1 / Column 4 → 3 (Full House)
  66. Row 7 / Column 4 → 2 (Full House)
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