Solution for Evil Sudoku #1223713524895

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

This Sudoku Puzzle has 52 steps and it is solved using Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Triple, Naked Single, Locked Pair, Full House, Give Up techniques.

Try To Solve This Puzzle

Solution Steps:

  1. Row 2 / Column 2 → 3 (Hidden Single)
  2. Row 5 / Column 5 → 3 (Hidden Single)
  3. Row 5 / Column 1 → 1 (Hidden Single)
  4. Row 7 / Column 1 → 4 (Hidden Single)
  5. Row 7 / Column 7 → 3 (Hidden Single)
  6. Row 8 / Column 1 → 3 (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 1 (Pointing): 8 in b8 => r9c79<>8
  10. Locked Candidates Type 2 (Claiming): 8 in c9 => r1c8<>8
  11. Naked Triple: 4,6,9 in r5c237 => r5c89<>6, r5c89<>9
  12. Row 5 / Column 8 → 7 (Naked Single)
  13. Row 5 / Column 9 → 7 (Naked Single)
  14. Row 8 / Column 6 → 7 (Hidden Single)
  15. Row 1 / Column 3 → 7 (Hidden Single)
  16. Row 2 / Column 4 → 7 (Hidden Single)
  17. Row 1 / Column 9 → 4 (Hidden Single)
  18. Row 1 / Column 5 → 8 (Hidden Single)
  19. Row 3 / Column 9 → 8 (Hidden Single)
  20. Row 9 / Column 4 → 8 (Hidden Single)
  21. Row 9 / Column 2 → 2 (Hidden Single)
  22. Row 7 / Column 4 → 2 (Hidden Single)
  23. Row 3 / Column 3 → 2 (Hidden Single)
  24. Row 8 / Column 8 → 2 (Hidden Single)
  25. Row 9 / Column 1 → 5 (Hidden Single)
  26. Row 3 / Column 2 → 4 (Hidden Single)
  27. Row 8 / Column 7 → 8 (Hidden Single)
  28. Row 2 / Column 3 → 5 (Hidden Single)
  29. Row 6 / Column 7 → 5 (Hidden Single)
  30. Row 1 / Column 8 → 5 (Hidden Single)
  31. Row 4 / Column 2 → 5 (Hidden Single)
  32. Row 6 / Column 6 → 4 (Hidden Single)
  33. Row 5 / Column 7 → 4 (Hidden Single)
  34. Row 4 / Column 8 → 8 (Hidden Single)
  35. Row 6 / Column 2 → 8 (Hidden Single)
  36. Row 4 / Column 3 → 4 (Hidden Single)
  37. Row 6 / Column 4 → 1 (Hidden Single)
  38. Row 3 / Column 6 → 1 (Hidden Single)
  39. Row 6 / Column 8 → 6 (Hidden Single)
  40. Row 3 / Column 5 → 5 (Hidden Single)
  41. Row 7 / Column 6 → 5 (Hidden Single)
  42. Locked Pair: 6,9 in r9c79 => r7c9,r9c5<>6, r7c89,r9c5<>9
  43. Row 9 / Column 5 → 9 (Naked Single)
  44. Row 7 / Column 8 → 1 (Naked Single)
  45. Row 2 / Column 8 → 9 (Full House)
  46. Row 9 / Column 7 → 6 (Full House)
  47. Row 2 / Column 7 → 6 (Full House)
  48. Row 7 / Column 9 → 1 (Naked Single)
  49. Row 7 / Column 5 → 6 (Naked Single)
  50. Row 9 / Column 9 → 6 (Naked Single)
  51. Row 2 / Column 9 → 1 (Naked Single)
  52. Give Up: Don't know how to proceed!
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