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

This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Hidden Single, Full House, Locked Candidates Type 1 (Pointing), Naked Triple, Skyscraper, Locked Candidates Type 2 (Claiming), undefined techniques.

Try To Solve This Puzzle

Solution Steps:

1. Row 4 / Column 7 → 1 (Naked Single)
2. Row 1 / Column 9 → 9 (Hidden Single)
3. Row 2 / Column 2 → 9 (Hidden Single)
4. Row 6 / Column 5 → 9 (Hidden Single)
5. Row 8 / Column 5 → 3 (Hidden Single)
6. Row 5 / Column 7 → 3 (Hidden Single)
7. Row 5 / Column 9 → 4 (Naked Single)
8. Row 9 / Column 9 → 1 (Naked Single)
9. Row 8 / Column 9 → 8 (Naked Single)
10. Row 2 / Column 9 → 5 (Naked Single)
11. Row 3 / Column 9 → 3 (Full House)
12. Row 9 / Column 7 → 9 (Hidden Single)
13. Row 6 / Column 4 → 4 (Hidden Single)
14. Row 8 / Column 2 → 1 (Hidden Single)
15. Row 7 / Column 6 → 8 (Hidden Single)
16. Row 6 / Column 8 → 5 (Hidden Single)
17. Row 4 / Column 8 → 2 (Full House)
18. Row 9 / Column 4 → 5 (Hidden Single)
19. Row 4 / Column 6 → 5 (Hidden Single)
20. Row 2 / Column 4 → 7 (Hidden Single)
21. Row 9 / Column 5 → 7 (Hidden Single)
22. Row 2 / Column 8 → 1 (Hidden Single)
23. Locked Candidates Type 1 (Pointing): 2 in b5 => r5c13<>2
24. Locked Candidates Type 1 (Pointing): 2 in b8 => r5c6<>2
25. Locked Candidates Type 1 (Pointing): 4 in b8 => r1c6<>4
26. Locked Candidates Type 1 (Pointing): 6 in b9 => r8c13<>6
27. Naked Triple: 2,6,8 in r2c13,r3c2 => r1c13<>6, r1c1<>8
28. Skyscraper: 8 in r2c1,r4c2 (connected by r24c5) => r3c2,r5c1<>8
29. Row 4 / Column 2 → 8 (Hidden Single)
30. Row 4 / Column 5 → 6 (Full House)
31. Row 5 / Column 6 → 1 (Naked Single)
32. Row 1 / Column 6 → 6 (Naked Single)
33. Row 2 / Column 1 → 8 (Hidden Single)
34. Row 1 / Column 4 → 1 (Hidden Single)
35. Locked Candidates Type 2 (Claiming): 2 in c1 => r8c3,r9c2<>2
36. XY-Wing: 3/7/5 in r17c1,r8c3 => r1c3,r8c1<>5
37. Row 1 / Column 3 → 3 (Naked Single)
38. Row 1 / Column 1 → 5 (Naked Single)
39. Row 6 / Column 3 → 2 (Naked Single)
40. Row 6 / Column 2 → 3 (Full House)
41. Row 2 / Column 3 → 6 (Naked Single)
42. Row 3 / Column 2 → 2 (Full House)
43. Row 7 / Column 2 → 4 (Naked Single)
44. Row 9 / Column 2 → 6 (Full House)
45. Row 2 / Column 7 → 4 (Naked Single)
46. Row 2 / Column 5 → 2 (Full House)
47. Row 8 / Column 7 → 6 (Full House)
48. Row 5 / Column 3 → 7 (Naked Single)
49. Row 5 / Column 1 → 6 (Full House)
50. Row 8 / Column 3 → 5 (Full House)
51. Row 3 / Column 4 → 8 (Naked Single)
52. Row 1 / Column 5 → 4 (Full House)
53. Row 1 / Column 8 → 8 (Full House)
54. Row 5 / Column 5 → 8 (Full House)
55. Row 3 / Column 8 → 6 (Full House)
56. Row 5 / Column 4 → 2 (Full House)
57. Row 7 / Column 8 → 7 (Naked Single)
58. Row 7 / Column 1 → 3 (Full House)
59. Row 8 / Column 8 → 4 (Full House)
60. Row 9 / Column 1 → 2 (Naked Single)
61. Row 8 / Column 1 → 7 (Full House)
62. Row 8 / Column 6 → 2 (Full House)
63. Row 9 / Column 6 → 4 (Full House)