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

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

Try To Solve This Puzzle

## Solution Steps:

1. Row 4 / Column 6 → 7 (Hidden Single)
2. Locked Candidates Type 1 (Pointing): 6 in b7 => r56c3<>6
3. Locked Candidates Type 1 (Pointing): 2 in b8 => r5c6<>2
4. Locked Candidates Type 1 (Pointing): 2 in b9 => r4c7<>2
5. Locked Candidates Type 2 (Claiming): 3 in r4 => r56c8<>3
6. Locked Candidates Type 2 (Claiming): 9 in r4 => r56c8,r6c9<>9
7. Locked Candidates Type 2 (Claiming): 6 in c5 => r5c46,r6c4<>6
8. Row 5 / Column 6 → 9 (Naked Single)
9. Row 7 / Column 6 → 2 (Naked Single)
10. Row 5 / Column 1 → 6 (Hidden Single)
11. Row 6 / Column 2 → 9 (Hidden Single)
12. Row 6 / Column 3 → 7 (Hidden Single)
13. Locked Candidates Type 1 (Pointing): 4 in b4 => r5c8<>4
14. Naked Pair: 4,9 in r7c7,r8c9 => r8c7<>4, r8c7<>9
15. Hidden Pair: 1,6 in r89c3 => r89c3<>2, r8c3<>4
16. Locked Candidates Type 1 (Pointing): 2 in b7 => r5c2<>2
17. W-Wing: 3/4 in r3c8,r7c3 connected by 4 in r27c7 => r3c3<>3
18. Row 3 / Column 3 → 8 (Naked Single)
19. Row 3 / Column 4 → 6 (Naked Single)
20. Row 3 / Column 6 → 4 (Naked Single)
21. Row 2 / Column 6 → 8 (Full House)
22. Row 3 / Column 8 → 3 (Full House)
23. Row 8 / Column 6 → 6 (Full House)
24. Row 9 / Column 4 → 7 (Naked Single)
25. Row 8 / Column 3 → 1 (Naked Single)
26. Row 7 / Column 4 → 9 (Naked Single)
27. Row 8 / Column 4 → 8 (Full House)
28. Row 9 / Column 2 → 2 (Naked Single)
29. Row 8 / Column 7 → 2 (Naked Single)
30. Row 9 / Column 3 → 6 (Naked Single)
31. Row 9 / Column 7 → 1 (Full House)
32. Row 7 / Column 7 → 4 (Naked Single)
33. Row 8 / Column 9 → 9 (Full House)
34. Row 8 / Column 2 → 4 (Full House)
35. Row 2 / Column 7 → 9 (Naked Single)
36. Row 2 / Column 8 → 4 (Full House)
37. Row 4 / Column 7 → 3 (Full House)
38. Row 7 / Column 3 → 3 (Naked Single)
39. Row 7 / Column 2 → 7 (Full House)
40. Row 5 / Column 2 → 3 (Full House)
41. Row 4 / Column 9 → 6 (Naked Single)
42. Row 6 / Column 9 → 4 (Full House)
43. Row 2 / Column 3 → 2 (Naked Single)
44. Row 2 / Column 1 → 3 (Full House)
45. Row 6 / Column 1 → 2 (Full House)
46. Row 5 / Column 3 → 4 (Full House)
47. Row 5 / Column 4 → 5 (Naked Single)
48. Row 5 / Column 8 → 2 (Full House)
49. Row 6 / Column 4 → 3 (Full House)
50. Row 4 / Column 5 → 2 (Naked Single)
51. Row 6 / Column 5 → 6 (Full House)
52. Row 6 / Column 8 → 5 (Full House)
53. Row 4 / Column 8 → 9 (Full House)