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

This Sudoku Puzzle has 53 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Uniqueness Test 1, undefined, Give Up techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 9 → 3 (Naked Single)
2. Row 5 / Column 1 → 4 (Full House)
3. Row 3 / Column 8 → 5 (Naked Single)
4. Row 4 / Column 4 → 4 (Hidden Single)
5. Row 1 / Column 1 → 1 (Hidden Single)
6. Row 2 / Column 4 → 1 (Hidden Single)
7. Row 9 / Column 9 → 1 (Hidden Single)
8. Row 7 / Column 2 → 2 (Hidden Single)
9. Row 4 / Column 6 → 6 (Hidden Single)
10. Row 6 / Column 1 → 5 (Hidden Single)
11. Row 7 / Column 9 → 4 (Hidden Single)
12. Row 8 / Column 9 → 5 (Hidden Single)
13. Locked Candidates Type 1 (Pointing): 3 in b5 => r6c23<>3
14. Row 6 / Column 2 → 9 (Naked Single)
15. Row 4 / Column 1 → 3 (Naked Single)
16. Row 9 / Column 2 → 7 (Naked Single)
17. Row 3 / Column 4 → 3 (Hidden Single)
18. Row 6 / Column 4 → 7 (Naked Single)
19. Row 6 / Column 6 → 3 (Full House)
20. Row 3 / Column 1 → 7 (Hidden Single)
21. Row 3 / Column 9 → 6 (Full House)
22. Row 7 / Column 5 → 3 (Hidden Single)
23. Row 7 / Column 4 → 8 (Hidden Single)
24. Row 7 / Column 6 → 5 (Hidden Single)
25. Row 1 / Column 4 → 5 (Hidden Single)
26. Row 2 / Column 2 → 5 (Hidden Single)
27. Locked Candidates Type 1 (Pointing): 6 in b1 => r8c3<>6
28. Locked Candidates Type 1 (Pointing): 9 in b9 => r14c7<>9
29. Uniqueness Test 1: 3/4 in r1c23,r8c23 => r1c3<>3, r1c3<>4
30. Row 1 / Column 3 → 6 (Naked Single)
31. Row 1 / Column 5 → 8 (Naked Single)
32. Row 2 / Column 5 → 6 (Full House)
33. Row 2 / Column 3 → 4 (Naked Single)
34. Row 1 / Column 2 → 3 (Full House)
35. Row 8 / Column 2 → 4 (Full House)
36. Row 8 / Column 3 → 3 (Naked Single)
37. Row 1 / Column 8 → 4 (Hidden Single)
38. Uniqueness Test 1: 2/8 in r4c39,r6c39 => r4c9<>2, r4c9<>8
39. W-Wing: 9/7 in r1c6,r4c9 connected by 7 in r2c69 => r1c9<>9
40. Row 1 / Column 6 → 9 (Hidden Single)
41. Row 2 / Column 6 → 7 (Full House)
42. Uniqueness Test 1: 2/7 in r1c79,r4c79 => r4c9<>7
43. Row 4 / Column 9 → 9 (Naked Single)
44. Row 2 / Column 9 → 8 (Naked Single)
45. Row 2 / Column 8 → 9 (Full House)
46. Row 4 / Column 8 → 8 (Full House)
47. Row 6 / Column 9 → 2 (Naked Single)
48. Row 1 / Column 9 → 7 (Full House)
49. Row 4 / Column 7 → 7 (Full House)
50. Row 4 / Column 3 → 2 (Full House)
51. Row 6 / Column 3 → 8 (Full House)
52. Row 1 / Column 7 → 2 (Full House)
53. Give Up: Don't know how to proceed!