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

This Sudoku Puzzle has 48 steps and it is solved using Hidden Single, Naked Single, Full House, Naked Triple, undefined, Uniqueness Test 3, Give Up techniques.

Try To Solve This Puzzle

Solution Steps:

1. Row 6 / Column 8 → 6 (Hidden Single)
2. Row 7 / Column 9 → 9 (Hidden Single)
3. Row 8 / Column 2 → 8 (Hidden Single)
4. Row 2 / Column 8 → 2 (Hidden Single)
5. Row 4 / Column 8 → 1 (Hidden Single)
6. Row 4 / Column 2 → 5 (Naked Single)
7. Row 6 / Column 2 → 1 (Naked Single)
8. Row 6 / Column 1 → 2 (Naked Single)
9. Row 6 / Column 3 → 8 (Naked Single)
10. Row 8 / Column 9 → 1 (Hidden Single)
11. Row 8 / Column 1 → 3 (Naked Single)
12. Row 9 / Column 1 → 7 (Naked Single)
13. Row 7 / Column 1 → 1 (Naked Single)
14. Row 7 / Column 3 → 2 (Full House)
15. Row 5 / Column 5 → 1 (Hidden Single)
16. Row 4 / Column 4 → 8 (Hidden Single)
17. Row 1 / Column 3 → 1 (Hidden Single)
18. Row 5 / Column 6 → 3 (Hidden Single)
19. Row 5 / Column 7 → 2 (Hidden Single)
20. Row 8 / Column 6 → 2 (Hidden Single)
21. Row 8 / Column 5 → 5 (Naked Single)
22. Row 8 / Column 7 → 4 (Full House)
23. Row 7 / Column 4 → 7 (Naked Single)
24. Row 4 / Column 7 → 7 (Naked Single)
25. Row 9 / Column 8 → 8 (Naked Single)
26. Row 6 / Column 4 → 5 (Naked Single)
27. Row 6 / Column 6 → 7 (Full House)
28. Row 4 / Column 5 → 2 (Full House)
29. Row 4 / Column 9 → 4 (Full House)
30. Row 5 / Column 9 → 8 (Full House)
31. Row 7 / Column 6 → 6 (Naked Single)
32. Row 7 / Column 7 → 5 (Full House)
33. Row 9 / Column 7 → 6 (Full House)
34. Row 9 / Column 5 → 3 (Naked Single)
35. Row 9 / Column 4 → 4 (Full House)
36. Row 2 / Column 4 → 3 (Full House)
37. Row 2 / Column 2 → 6 (Naked Single)
38. Row 1 / Column 2 → 3 (Full House)
39. Row 1 / Column 7 → 8 (Naked Single)
40. Row 3 / Column 7 → 3 (Full House)
41. Row 3 / Column 6 → 8 (Hidden Single)
42. Naked Triple: 4,5,9 in r1c168 => r1c5<>9, r1c9<>5
43. W-Wing: 4/9 in r3c8,r5c1 connected by 9 in r1c18 => r3c1<>4
44. Uniqueness Test 3: 6/7 in r1c59,r3c59 => r3c38<>9
45. Row 3 / Column 8 → 4 (Naked Single)
46. Row 1 / Column 8 → 9 (Full House)
47. Row 3 / Column 3 → 7 (Naked Single)
48. Give Up: Don't know how to proceed!