# Solution for Evil Sudoku #1217713524895

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

This Sudoku Puzzle has 54 steps and it is solved using Hidden Single, Locked Pair, Naked Single, Full House, Give Up techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 2 / Column 4 → 1 (Hidden Single)
2. Row 7 / Column 8 → 1 (Hidden Single)
3. Row 8 / Column 8 → 7 (Hidden Single)
4. Row 5 / Column 9 → 7 (Hidden Single)
5. Row 7 / Column 1 → 4 (Hidden Single)
6. Row 8 / Column 7 → 8 (Hidden Single)
7. Locked Pair: 6,9 in r46c4 => r379c4,r46c6,r5c5<>6, r379c4,r46c6,r5c5<>9
8. Row 3 / Column 4 → 8 (Naked Single)
9. Row 7 / Column 4 → 2 (Naked Single)
10. Row 5 / Column 5 → 3 (Naked Single)
11. Row 6 / Column 6 → 4 (Naked Single)
12. Row 9 / Column 4 → 2 (Naked Single)
13. Row 4 / Column 6 → 4 (Naked Single)
14. Row 9 / Column 5 → 8 (Hidden Single)
15. Row 1 / Column 9 → 8 (Hidden Single)
16. Row 5 / Column 7 → 4 (Hidden Single)
17. Row 3 / Column 9 → 2 (Hidden Single)
18. Row 1 / Column 3 → 4 (Hidden Single)
19. Row 6 / Column 7 → 2 (Hidden Single)
20. Locked Pair: 6,9 in r79c9 => r2c9,r79c7<>6, r2c9,r79c7<>9
21. Row 2 / Column 9 → 9 (Naked Single)
22. Row 7 / Column 7 → 3 (Naked Single)
23. Row 9 / Column 7 → 3 (Naked Single)
24. Row 7 / Column 9 → 6 (Naked Single)
25. Row 9 / Column 9 → 6 (Naked Single)
26. Row 1 / Column 1 → 2 (Hidden Single)
27. Row 2 / Column 7 → 5 (Hidden Single)
28. Row 1 / Column 8 → 6 (Naked Single)
29. Row 2 / Column 8 → 6 (Naked Single)
30. Row 5 / Column 8 → 9 (Naked Single)
31. Row 2 / Column 2 → 3 (Naked Single)
32. Row 2 / Column 3 → 3 (Naked Single)
33. Row 5 / Column 1 → 6 (Naked Single)
34. Row 5 / Column 2 → 2 (Full House)
35. Row 5 / Column 3 → 2 (Full House)
36. Row 8 / Column 6 → 3 (Hidden Single)
37. Row 8 / Column 1 → 9 (Naked Single)
38. Row 3 / Column 1 → 5 (Full House)
39. Row 8 / Column 2 → 6 (Full House)
40. Row 8 / Column 3 → 6 (Full House)
41. Row 9 / Column 1 → 5 (Full House)
42. Row 9 / Column 2 → 5 (Naked Single)
43. Row 3 / Column 2 → 9 (Naked Single)
44. Row 3 / Column 3 → 9 (Naked Single)
45. Row 3 / Column 5 → 6 (Naked Single)
46. Row 3 / Column 6 → 6 (Naked Single)
47. Row 4 / Column 2 → 8 (Naked Single)
48. Row 6 / Column 2 → 8 (Naked Single)
49. Row 4 / Column 8 → 5 (Full House)
50. Row 6 / Column 8 → 5 (Full House)
51. Row 4 / Column 3 → 5 (Naked Single)
52. Row 4 / Column 4 → 6 (Hidden Single)
53. Row 6 / Column 4 → 9 (Naked Single)
54. Give Up: Don't know how to proceed!