Solution for Evil Sudoku #1327713524895

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

This Sudoku Puzzle has 58 steps and it is solved using Hidden Single, Locked Candidates Type 2 (Claiming), Naked Triple, Naked Single, Full House techniques.

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Solution Steps:

  1. Row 1 / Column 5 → 1 (Hidden Single)
  2. Row 4 / Column 8 → 7 (Hidden Single)
  3. Row 1 / Column 3 → 4 (Hidden Single)
  4. Row 9 / Column 5 → 7 (Hidden Single)
  5. Row 8 / Column 2 → 7 (Hidden Single)
  6. Row 8 / Column 3 → 2 (Hidden Single)
  7. Row 7 / Column 2 → 8 (Hidden Single)
  8. Row 4 / Column 1 → 2 (Hidden Single)
  9. Row 8 / Column 8 → 1 (Hidden Single)
  10. Row 9 / Column 3 → 1 (Hidden Single)
  11. Row 4 / Column 7 → 8 (Hidden Single)
  12. Row 5 / Column 1 → 8 (Hidden Single)
  13. Row 9 / Column 9 → 8 (Hidden Single)
  14. Row 4 / Column 4 → 1 (Hidden Single)
  15. Row 6 / Column 7 → 1 (Hidden Single)
  16. Row 9 / Column 7 → 4 (Hidden Single)
  17. Row 3 / Column 9 → 4 (Hidden Single)
  18. Locked Candidates Type 2 (Claiming): 3 in r1 => r2c12,r3c2<>3
  19. Naked Triple: 3,6,9 in r358c5 => r2c5<>3, r27c5<>6, r27c5<>9
  20. Row 2 / Column 5 → 4 (Naked Single)
  21. Row 7 / Column 5 → 4 (Naked Single)
  22. Row 6 / Column 6 → 4 (Hidden Single)
  23. Row 5 / Column 5 → 3 (Hidden Single)
  24. Naked Triple: 5,6,9 in r156c9 => r8c9<>5, r8c9<>6, r8c9<>9
  25. Row 8 / Column 9 → 9 (Naked Single)
  26. Row 8 / Column 5 → 6 (Naked Single)
  27. Row 9 / Column 8 → 6 (Naked Single)
  28. Row 9 / Column 1 → 9 (Full House)
  29. Row 3 / Column 5 → 9 (Naked Single)
  30. Row 7 / Column 8 → 5 (Naked Single)
  31. Row 3 / Column 8 → 3 (Naked Single)
  32. Row 2 / Column 8 → 9 (Full House)
  33. Row 7 / Column 4 → 9 (Naked Single)
  34. Row 6 / Column 4 → 6 (Naked Single)
  35. Row 4 / Column 6 → 9 (Full House)
  36. Row 4 / Column 3 → 6 (Full House)
  37. Row 6 / Column 9 → 5 (Naked Single)
  38. Row 7 / Column 3 → 3 (Naked Single)
  39. Row 7 / Column 1 → 6 (Full House)
  40. Row 1 / Column 9 → 6 (Naked Single)
  41. Row 5 / Column 9 → 6 (Naked Single)
  42. Row 6 / Column 3 → 9 (Naked Single)
  43. Row 5 / Column 3 → 5 (Full House)
  44. Row 6 / Column 2 → 3 (Full House)
  45. Row 2 / Column 1 → 5 (Naked Single)
  46. Row 1 / Column 1 → 3 (Full House)
  47. Row 1 / Column 7 → 5 (Naked Single)
  48. Row 1 / Column 2 → 9 (Full House)
  49. Row 2 / Column 7 → 2 (Full House)
  50. Row 3 / Column 7 → 2 (Full House)
  51. Row 2 / Column 2 → 6 (Full House)
  52. Row 3 / Column 2 → 6 (Full House)
  53. Row 5 / Column 7 → 9 (Naked Single)
  54. Row 2 / Column 4 → 8 (Naked Single)
  55. Row 2 / Column 6 → 3 (Full House)
  56. Row 3 / Column 6 → 5 (Full House)
  57. Row 8 / Column 4 → 5 (Full House)
  58. Row 8 / Column 6 → 8 (Full House)
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