Solution for Evil Sudoku #1271713524895

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

This Sudoku Puzzle has 62 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Single, Full House, Locked Triple, Naked Pair, Avoidable Rectangle Type 1 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 2 / Column 4 → 7 (Hidden Single)
  2. Row 8 / Column 6 → 7 (Hidden Single)
  3. Row 7 / Column 1 → 4 (Hidden Single)
  4. Row 3 / Column 4 → 1 (Hidden Single)
  5. Row 9 / Column 4 → 8 (Hidden Single)
  6. Row 7 / Column 4 → 2 (Hidden Single)
  7. Locked Candidates Type 1 (Pointing): 4 in b3 => r5c9<>4
  8. Locked Candidates Type 1 (Pointing): 5 in b7 => r9c5<>5
  9. Locked Candidates Type 2 (Claiming): 6 in c4 => r46c6,r5c5<>6
  10. Locked Candidates Type 2 (Claiming): 9 in c4 => r46c6,r5c5<>9
  11. Row 5 / Column 5 → 3 (Naked Single)
  12. Row 6 / Column 6 → 4 (Naked Single)
  13. Row 4 / Column 6 → 4 (Naked Single)
  14. Row 7 / Column 6 → 3 (Hidden Single)
  15. Row 5 / Column 7 → 4 (Hidden Single)
  16. Row 7 / Column 5 → 5 (Hidden Single)
  17. Row 3 / Column 2 → 4 (Hidden Single)
  18. Row 9 / Column 5 → 6 (Hidden Single)
  19. Row 1 / Column 9 → 4 (Hidden Single)
  20. Row 3 / Column 9 → 8 (Hidden Single)
  21. Row 3 / Column 5 → 9 (Naked Single)
  22. Row 1 / Column 5 → 8 (Full House)
  23. Row 1 / Column 8 → 2 (Hidden Single)
  24. Locked Triple: 2,6,9 in r5c123 => r4c23,r5c89,r6c2<>6, r4c23,r5c89,r6c2<>9, r5c9,r6c2<>2
  25. Row 5 / Column 8 → 9 (Naked Single)
  26. Row 5 / Column 9 → 9 (Naked Single)
  27. Row 9 / Column 9 → 2 (Naked Single)
  28. Row 6 / Column 7 → 2 (Hidden Single)
  29. Row 4 / Column 4 → 9 (Hidden Single)
  30. Row 6 / Column 4 → 6 (Full House)
  31. Row 2 / Column 7 → 9 (Hidden Single)
  32. Row 7 / Column 7 → 6 (Naked Single)
  33. Row 7 / Column 8 → 1 (Full House)
  34. Row 7 / Column 9 → 1 (Full House)
  35. Row 9 / Column 7 → 3 (Naked Single)
  36. Row 8 / Column 7 → 8 (Full House)
  37. Row 8 / Column 8 → 8 (Naked Single)
  38. Row 2 / Column 9 → 6 (Naked Single)
  39. Row 2 / Column 8 → 5 (Full House)
  40. Row 2 / Column 2 → 3 (Full House)
  41. Row 2 / Column 3 → 3 (Full House)
  42. Row 6 / Column 8 → 5 (Naked Single)
  43. Row 4 / Column 8 → 6 (Naked Single)
  44. Row 4 / Column 3 → 5 (Naked Single)
  45. Row 6 / Column 2 → 8 (Naked Single)
  46. Row 4 / Column 2 → 8 (Naked Single)
  47. Row 8 / Column 1 → 3 (Hidden Single)
  48. Row 9 / Column 2 → 5 (Hidden Single)
  49. Row 9 / Column 1 → 9 (Full House)
  50. Row 1 / Column 3 → 9 (Hidden Single)
  51. Naked Pair: 2,6 in r5c12 => r5c3<>2, r5c3<>6
  52. Row 5 / Column 3 → 6 (Naked Single)
  53. Row 3 / Column 3 → 2 (Naked Single)
  54. Row 5 / Column 1 → 2 (Naked Single)
  55. Row 5 / Column 2 → 2 (Naked Single)
  56. Row 8 / Column 3 → 2 (Naked Single)
  57. Row 8 / Column 2 → 6 (Naked Single)
  58. Avoidable Rectangle Type 1: 2/6 in r3c13,r5c13 => r3c1<>6
  59. Row 3 / Column 1 → 5 (Naked Single)
  60. Row 1 / Column 1 → 6 (Full House)
  61. Row 3 / Column 6 → 6 (Full House)
  62. Row 1 / Column 6 → 5 (Full House)
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