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

This Sudoku Puzzle has 40 steps and it is solved using Naked Single, Full House, Hidden Single, Uniqueness Test 2, Uniqueness Test 4, undefined, Give Up techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Row 5 / Column 1 → 6 (Naked Single)
2. Row 1 / Column 2 → 3 (Naked Single)
3. Row 2 / Column 1 → 8 (Naked Single)
4. Row 7 / Column 1 → 9 (Full House)
5. Row 4 / Column 3 → 1 (Naked Single)
6. Row 5 / Column 5 → 3 (Naked Single)
7. Row 2 / Column 3 → 6 (Naked Single)
8. Row 3 / Column 3 → 2 (Full House)
9. Row 9 / Column 3 → 3 (Full House)
10. Row 4 / Column 2 → 4 (Naked Single)
11. Row 6 / Column 2 → 7 (Full House)
12. Row 5 / Column 6 → 9 (Naked Single)
13. Row 2 / Column 4 → 3 (Naked Single)
14. Row 4 / Column 4 → 6 (Naked Single)
15. Row 6 / Column 5 → 2 (Full House)
16. Row 2 / Column 6 → 4 (Naked Single)
17. Row 2 / Column 7 → 7 (Full House)
18. Row 4 / Column 7 → 2 (Naked Single)
19. Row 4 / Column 8 → 9 (Full House)
20. Row 9 / Column 6 → 8 (Naked Single)
21. Row 3 / Column 6 → 6 (Naked Single)
22. Row 9 / Column 2 → 1 (Naked Single)
23. Row 7 / Column 2 → 8 (Full House)
24. Row 1 / Column 5 → 5 (Naked Single)
25. Row 1 / Column 8 → 6 (Full House)
26. Row 9 / Column 4 → 5 (Naked Single)
27. Row 3 / Column 4 → 1 (Naked Single)
28. Row 3 / Column 5 → 8 (Full House)
29. Row 8 / Column 4 → 9 (Full House)
30. Row 8 / Column 5 → 1 (Naked Single)
31. Row 9 / Column 5 → 4 (Naked Single)
32. Row 7 / Column 5 → 6 (Full House)
33. Row 9 / Column 8 → 7 (Full House)
34. Row 6 / Column 7 → 6 (Hidden Single)
35. Uniqueness Test 2: 3/4 in r3c89,r6c89 => r3c7<>5
36. Uniqueness Test 4: 2/3 in r7c69,r8c69 => r78c9<>3
37. W-Wing: 4/3 in r3c7,r6c8 connected by 3 in r36c9 => r3c8<>4
38. W-Wing: 3/5 in r3c8,r8c7 connected by 5 in r5c78 => r3c7,r7c8<>3
39. Row 3 / Column 7 → 4 (Naked Single)
40. Give Up: Don't know how to proceed!