Solution for Medium Sudoku #21845216973102

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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Naked Triple, Naked Single, Locked Candidates Type 2 (Claiming), Full House techniques.

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Solution Steps:

  1. Row 2 / Column 1 → 7 (Hidden Single)
  2. Row 8 / Column 3 → 8 (Hidden Single)
  3. Row 8 / Column 8 → 7 (Hidden Single)
  4. Row 7 / Column 8 → 9 (Hidden Single)
  5. Locked Candidates Type 1 (Pointing): 1 in b4 => r123c3<>1
  6. Locked Candidates Type 1 (Pointing): 9 in b4 => r1c1<>9
  7. Locked Candidates Type 1 (Pointing): 3 in b7 => r1c1<>3
  8. Naked Triple: 1,4,7 in r5c46,r6c4 => r4c56,r6c5<>1, r46c5<>4
  9. Row 6 / Column 5 → 2 (Naked Single)
  10. Row 8 / Column 5 → 4 (Hidden Single)
  11. Row 8 / Column 6 → 9 (Hidden Single)
  12. Row 2 / Column 5 → 9 (Hidden Single)
  13. Row 1 / Column 2 → 9 (Hidden Single)
  14. Row 8 / Column 7 → 3 (Hidden Single)
  15. Naked Triple: 1,4,8 in r4c79,r6c7 => r56c9<>1, r56c9<>4
  16. Locked Candidates Type 2 (Claiming): 1 in r5 => r6c4<>1
  17. Naked Triple: 1,5,6 in r138c9 => r49c9<>1, r9c9<>6
  18. Locked Candidates Type 1 (Pointing): 1 in b6 => r279c7<>1
  19. Row 9 / Column 8 → 1 (Hidden Single)
  20. Row 1 / Column 8 → 2 (Naked Single)
  21. Row 2 / Column 8 → 8 (Full House)
  22. Row 3 / Column 6 → 2 (Hidden Single)
  23. Row 3 / Column 4 → 7 (Hidden Single)
  24. Row 6 / Column 4 → 4 (Naked Single)
  25. Row 5 / Column 4 → 1 (Naked Single)
  26. Row 6 / Column 7 → 1 (Naked Single)
  27. Row 2 / Column 4 → 6 (Naked Single)
  28. Row 5 / Column 6 → 7 (Naked Single)
  29. Row 6 / Column 3 → 5 (Naked Single)
  30. Row 2 / Column 7 → 5 (Naked Single)
  31. Row 5 / Column 9 → 9 (Naked Single)
  32. Row 5 / Column 1 → 4 (Full House)
  33. Row 2 / Column 3 → 2 (Naked Single)
  34. Row 2 / Column 2 → 1 (Full House)
  35. Row 3 / Column 3 → 3 (Naked Single)
  36. Row 6 / Column 1 → 9 (Naked Single)
  37. Row 6 / Column 9 → 7 (Full House)
  38. Row 1 / Column 1 → 6 (Naked Single)
  39. Row 4 / Column 1 → 2 (Naked Single)
  40. Row 4 / Column 3 → 1 (Full House)
  41. Row 1 / Column 3 → 4 (Full House)
  42. Row 3 / Column 2 → 5 (Full House)
  43. Row 3 / Column 5 → 1 (Naked Single)
  44. Row 1 / Column 6 → 3 (Full House)
  45. Row 1 / Column 9 → 1 (Full House)
  46. Row 3 / Column 9 → 6 (Full House)
  47. Row 9 / Column 1 → 3 (Naked Single)
  48. Row 7 / Column 1 → 5 (Full House)
  49. Row 8 / Column 2 → 6 (Naked Single)
  50. Row 8 / Column 9 → 5 (Full House)
  51. Row 9 / Column 2 → 2 (Full House)
  52. Row 4 / Column 6 → 6 (Naked Single)
  53. Row 4 / Column 5 → 3 (Full House)
  54. Row 7 / Column 6 → 1 (Full House)
  55. Row 7 / Column 5 → 6 (Full House)
  56. Row 9 / Column 4 → 8 (Naked Single)
  57. Row 7 / Column 4 → 3 (Full House)
  58. Row 7 / Column 7 → 8 (Full House)
  59. Row 9 / Column 9 → 4 (Naked Single)
  60. Row 4 / Column 9 → 8 (Full House)
  61. Row 4 / Column 7 → 4 (Full House)
  62. Row 9 / Column 7 → 6 (Full House)
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