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

This Sudoku Puzzle has 62 steps and it is solved using Locked Candidates Type 1 (Pointing), Skyscraper, undefined, Uniqueness Test 4, Sue de Coq, Empty Rectangle, Naked Single, Hidden Single, Naked Pair, AIC, Naked Triple, Hidden Rectangle, Finned Swordfish, Full House techniques.

Try To Solve This Puzzle

## Solution Steps:

1. Locked Candidates Type 1 (Pointing): 6 in b1 => r3c8<>6
2. Locked Candidates Type 1 (Pointing): 2 in b6 => r8c7<>2
3. Skyscraper: 5 in r3c3,r7c1 (connected by r37c7) => r2c1,r89c3<>5
4. Skyscraper: 3 in r8c7,r9c2 (connected by r6c27) => r8c3,r9c89<>3
5. W-Wing: 3/6 in r1c9,r4c3 connected by 6 in r14c8 => r4c9<>3
6. Uniqueness Test 4: 2/7 in r8c68,r9c68 => r89c8<>7
7. Sue de Coq: r9c123 - {35789} (r9c5 - {59}, r7c2 - {78}) => r78c1,r8c3<>7, r7c1<>8, r9c9<>5
8. Empty Rectangle: 7 in b3 (r7c28) => r2c2<>7
9. Row 2 / Column 2 → 9 (Naked Single)
10. Row 5 / Column 1 → 9 (Hidden Single)
11. Locked Candidates Type 1 (Pointing): 1 in b4 => r6c79<>1
12. Naked Pair: 3,6 in r16c9 => r4c9<>6, r8c9<>3
13. AIC: 8 8- r4c1 =8= r5c2 =2= r5c7 -2- r6c7 -3- r8c7 =3= r8c8 =2= r9c8 =1= r9c9 -1- r5c9 -8 => r4c89,r5c2<>8
14. Row 4 / Column 9 → 4 (Naked Single)
15. Row 5 / Column 2 → 2 (Naked Single)
16. Row 4 / Column 1 → 8 (Hidden Single)
17. Row 6 / Column 7 → 2 (Hidden Single)
18. Row 8 / Column 7 → 3 (Hidden Single)
19. W-Wing: 5/7 in r8c9,r9c1 connected by 7 in r7c28 => r8c1<>5
20. W-Wing: 7/5 in r8c9,r9c1 connected by 5 in r7c17 => r9c9<>7
21. Naked Pair: 1,8 in r59c9 => r2c9<>1, r2c9<>8
22. Naked Triple: 1,5,7 in r2c9,r3c78 => r2c78<>1, r2c7<>5, r2c8<>7
23. Locked Candidates Type 1 (Pointing): 1 in b3 => r3c3<>1
24. Hidden Rectangle: 1/7 in r2c13,r6c13 => r6c3<>7
25. Finned Swordfish: 7 r367 c128 fr3c3 => r2c1<>7
26. Row 2 / Column 1 → 1 (Naked Single)
27. Row 6 / Column 3 → 1 (Hidden Single)
28. XY-Chain: 8 8- r7c2 -7- r9c1 -5- r9c5 -9- r8c5 -5- r8c9 -7- r2c9 -5- r3c7 -1- r5c7 -8- r5c9 -1- r9c9 -8 => r7c78,r9c2<>8
29. Row 7 / Column 2 → 8 (Hidden Single)
30. Row 7 / Column 8 → 7 (Hidden Single)
31. Row 3 / Column 8 → 1 (Naked Single)
32. Row 8 / Column 9 → 5 (Naked Single)
33. Row 3 / Column 7 → 5 (Naked Single)
34. Row 2 / Column 9 → 7 (Naked Single)
35. Row 7 / Column 7 → 4 (Naked Single)
36. Row 7 / Column 1 → 5 (Full House)
37. Row 8 / Column 5 → 9 (Naked Single)
38. Row 9 / Column 5 → 5 (Full House)
39. Row 2 / Column 3 → 5 (Naked Single)
40. Row 2 / Column 7 → 8 (Naked Single)
41. Row 2 / Column 8 → 4 (Full House)
42. Row 5 / Column 7 → 1 (Full House)
43. Row 5 / Column 9 → 8 (Full House)
44. Row 8 / Column 8 → 2 (Naked Single)
45. Row 9 / Column 1 → 7 (Naked Single)
46. Row 8 / Column 3 → 6 (Naked Single)
47. Row 9 / Column 9 → 1 (Naked Single)
48. Row 9 / Column 8 → 8 (Full House)
49. Row 8 / Column 6 → 7 (Naked Single)
50. Row 9 / Column 6 → 2 (Full House)
51. Row 8 / Column 1 → 4 (Full House)
52. Row 6 / Column 1 → 6 (Full House)
53. Row 9 / Column 2 → 3 (Naked Single)
54. Row 9 / Column 3 → 9 (Full House)
55. Row 3 / Column 3 → 7 (Naked Single)
56. Row 4 / Column 3 → 3 (Full House)
57. Row 6 / Column 2 → 7 (Full House)
58. Row 6 / Column 9 → 3 (Full House)
59. Row 3 / Column 2 → 6 (Full House)
60. Row 4 / Column 8 → 6 (Full House)
61. Row 1 / Column 9 → 6 (Full House)
62. Row 1 / Column 8 → 3 (Full House)