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

This Sudoku Puzzle has 53 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), Naked Pair, Empty Rectangle, undefined, Uniqueness Test 1, Uniqueness Test 3, Give Up techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 6 / Column 4 → 8 (Naked Single)
2. Row 6 / Column 5 → 3 (Naked Single)
3. Row 1 / Column 7 → 9 (Naked Single)
4. Row 3 / Column 7 → 3 (Naked Single)
5. Row 7 / Column 7 → 4 (Naked Single)
6. Row 4 / Column 7 → 8 (Naked Single)
7. Row 8 / Column 7 → 2 (Full House)
8. Row 2 / Column 2 → 8 (Hidden Single)
9. Row 1 / Column 2 → 7 (Hidden Single)
10. Row 4 / Column 3 → 1 (Hidden Single)
11. Row 6 / Column 9 → 4 (Hidden Single)
12. Row 3 / Column 9 → 1 (Hidden Single)
13. Row 7 / Column 6 → 3 (Hidden Single)
14. Row 8 / Column 3 → 3 (Hidden Single)
15. Row 9 / Column 6 → 8 (Hidden Single)
16. Row 4 / Column 8 → 3 (Hidden Single)
17. Row 5 / Column 1 → 8 (Hidden Single)
18. Row 8 / Column 9 → 8 (Hidden Single)
19. Locked Candidates Type 1 (Pointing): 4 in b1 => r3c45<>4
20. Locked Candidates Type 2 (Claiming): 5 in c3 => r3c12<>5
21. Naked Pair: 5,6 in r2c68 => r2c4<>5, r2c45<>6
22. Empty Rectangle: 6 in b1 (r5c34) => r3c4<>6
23. W-Wing: 6/5 in r1c3,r4c1 connected by 5 in r14c9 => r3c1,r5c3<>6
24. Row 3 / Column 1 → 4 (Naked Single)
25. Row 5 / Column 3 → 2 (Naked Single)
26. Row 6 / Column 2 → 5 (Naked Single)
27. Row 4 / Column 1 → 6 (Full House)
28. Row 6 / Column 8 → 2 (Full House)
29. Row 5 / Column 4 → 6 (Hidden Single)
30. Row 9 / Column 3 → 4 (Hidden Single)
31. Row 3 / Column 2 → 2 (Hidden Single)
32. Row 4 / Column 9 → 5 (Hidden Single)
33. Row 1 / Column 9 → 6 (Naked Single)
34. Row 1 / Column 3 → 5 (Full House)
35. Row 2 / Column 8 → 5 (Full House)
36. Row 3 / Column 3 → 6 (Full House)
37. Row 2 / Column 6 → 6 (Naked Single)
38. Row 7 / Column 2 → 6 (Hidden Single)
39. Naked Pair: 7,9 in r34c5 => r89c5<>7, r89c5<>9
40. Uniqueness Test 1: 7/9 in r3c56,r4c56 => r3c6<>7, r3c6<>9
41. Row 3 / Column 6 → 5 (Naked Single)
42. W-Wing: 9/7 in r3c4,r7c9 connected by 7 in r9c48 => r7c4<>9
43. Row 7 / Column 9 → 9 (Hidden Single)
44. Row 5 / Column 9 → 7 (Full House)
45. Row 5 / Column 8 → 9 (Full House)
46. Uniqueness Test 1: 5/7 in r7c14,r8c14 => r8c4<>5, r8c4<>7
47. Row 8 / Column 1 → 5 (Hidden Single)
48. Row 7 / Column 1 → 7 (Full House)
49. Row 7 / Column 4 → 5 (Full House)
50. Uniqueness Test 3: 1/4 in r2c45,r8c45 => r8c2<>9
51. Row 8 / Column 2 → 1 (Naked Single)
52. Row 9 / Column 2 → 9 (Full House)
53. Give Up: Don't know how to proceed!