1. (1,1) = 5, row insufficiency (1,3) = (1,8) = 8, (1,1) now [4,9]
2. (1,1) = 9, row insufficiency for [(3,[8,5]),(6,[5]),(8,[8,5])] wrt [5], (1,1) now [4]
3. 3x3 at (11): (1,3) = 8 inconsistent with (2,2) = 8, (1,3) now [5]
4. (1,6) = 5 inconsistent with (1,3) = 5, (1,6) now [9]
5. (1,8) = 5 inconsistent with (1,3) = 5, (1,8) now [8]
6. 3x3 at (11): (2,3) = 1 inconsistent with (3,1) = 1, (2,3) now [2,5]
7. (2,3) = 5 inconsistent with (1,3) = 5, (2,3) now [2]
8. 3x3 at (14): (2,4) = 4 inconsistent with (3,6) = 4, (2,4) now [5]
9. (2,6) = 5 inconsistent with (2,4) = 5, (2,6) now [1]
10. (2,7) = 2 inconsistent with (2,3) = 2, (2,7) now [3,4,1]
11. (2,7) = 1 inconsistent with (2,6) = 1, (2,7) now [3,4]
12. (2,9) = 5 inconsistent with (2,4) = 5, (2,9) now [2,3]
13. (2,7) = 3, row insufficiency (2,3) = (2,9) = 2, (2,7) now [4]
14. (2,9) = 2 inconsistent with (2,3) = 2, (2,9) now [3]
15. 3x3 at (11): (3,3) = 6 inconsistent with (2,1) = 6, (3,3) now [7,8,2]
16. 3x3 at (11): (3,3) = 8 inconsistent with (2,2) = 8, (3,3) now [7,2]
17. (3,3) = 2 inconsistent with (2,3) = 2, (3,3) now [7]
18. (3,4) = 7 inconsistent with (3,3) = 7, (3,4) now [8]
19. 3x3 at (14): (3,5) = 2 inconsistent with (1,4) = 2, (3,5) now [3,8]
20. (3,5) = 8 inconsistent with (3,4) = 8, (3,5) now [3]
21. (3,8) = 8 inconsistent with (3,4) = 8, (3,8) now [6]
22. (3,9) = 7 inconsistent with (3,3) = 7, (3,9) now [2,3]
23. (3,9) = 3 inconsistent with (3,5) = 3, (3,9) now [2]
24. (4,3) = 5 inconsistent with (1,3) = 5, (4,3) now [6,7]
25. (4,3) = 7 inconsistent with (3,3) = 7, (4,3) now [6]
26. (4,5) = 3 inconsistent with (3,5) = 3, (4,5) now [9]
27. (4,6) = 6 inconsistent with (4,3) = 6, (4,6) now [5,7,9]
28. (4,6) = 9 inconsistent with (4,5) = 9, (4,6) now [5,7]
29. (4,7) = 6 inconsistent with (4,3) = 6, (4,7) now [3]
30. (4,9) = 9 inconsistent with (4,5) = 9, (4,9) now [3,5,7]
31. (4,9) = 3 inconsistent with (4,7) = 3, (4,9) now [7,5]
32. 3x3 at (41): (5,1) = 5 inconsistent with (6,2) = 5, (5,1) now [3]
33. (5,2) = 1 inconsistent with (7,2) = 1, (5,2) now [7,3]
34. (5,2) = 3 inconsistent with (5,1) = 3, (5,2) now [7]
35. (5,5) = 3 inconsistent with (5,1) = 3, (5,5) now [8]
36. (5,8) = 8 inconsistent with (5,5) = 8, (5,8) now [1,5]
37. (5,8) = 5, column insufficiency (3,8) = (9,8) = 6, (5,8) now [1]
38. (5,9) = 3 inconsistent with (5,1) = 3, (5,9) now [5,7]
39. (5,9) = 7 inconsistent with (5,2) = 7, (5,9) now [5]
40. (4,9) = 5 inconsistent with (5,9) = 5, (4,9) now [7]
41. (4,6) = 7 inconsistent with (4,9) = 7, (4,6) now [5]
42. (6,1) = 4 inconsistent with (1,1) = 4, (6,1) now [9]
43. (6,3) = 6 inconsistent with (4,3) = 6, (6,3) now [1,7]
44. (6,3) = 7 inconsistent with (3,3) = 7, (6,3) now [1]
45. (6,4) = 9 inconsistent with (6,1) = 9, (6,4) now [4,7]
46. (6,4) = 4, row insufficiency (6,1) = (6,5) = 9, (6,4) now [7]
47. (6,5) = 9 inconsistent with (6,1) = 9, (6,5) now [4]
48. (6,7) = 1 inconsistent with (6,3) = 1, (6,7) now [6,4]
49. (6,7) = 4 inconsistent with (6,5) = 4, (6,7) now [6]
50. (7,1) = 2, column insufficiency (6,1) = (8,1) = 9, (7,1) now [5]
51. (7,5) = 8 inconsistent with (5,5) = 8, (7,5) now [2]
52. (7,6) = 1 inconsistent with (7,2) = 1, (7,6) now [6,5]
53. (7,6) = 5 inconsistent with (7,1) = 5, (7,6) now [6]
54. (7,7) = 2 inconsistent with (7,5) = 2, (7,7) now [8,1,6]
55. (7,7) = 1 inconsistent with (7,2) = 1, (7,7) now [8,6]
56. (7,7) = 6 inconsistent with (7,6) = 6, (7,7) now [8]
57. (8,1) = 9 inconsistent with (6,1) = 9, (8,1) now [2]
58. (8,3) = 1 inconsistent with (6,3) = 1, (8,3) now [8,7,2]
59. (8,3) = 7 inconsistent with (3,3) = 7, (8,3) now [8,2]
60. (8,3) = 2 inconsistent with (8,1) = 2, (8,3) now [8]
61. (8,4) = 7 inconsistent with (6,4) = 7, (8,4) now [9,8]
62. (8,4) = 8 inconsistent with (8,3) = 8, (8,4) now [9]
63. (8,6) = 1 inconsistent with (2,6) = 1, (8,6) now [7,9]
64. (8,6) = 9 inconsistent with (8,4) = 9, (8,6) now [7]
65. (8,7) = 2 inconsistent with (8,1) = 2, (8,7) now [8,1]
66. (8,7) = 8 inconsistent with (8,3) = 8, (8,7) now [1]
67. (9,4) = 5 inconsistent with (2,4) = 5, (9,4) now [4,9]
68. (9,4) = 9 inconsistent with (8,4) = 9, (9,4) now [4]
69. (9,7) = 6 inconsistent with (9,2) = 6, (9,7) now [2,4]
70. (9,7) = 4 inconsistent with (9,4) = 4, (9,7) now [2]
71. (9,8) = 6 inconsistent with (9,2) = 6, (9,8) now [5]
72. (9,9) = 2 inconsistent with (9,7) = 2, (9,9) now [9,5]
73. (9,9) = 5 inconsistent with (9,8) = 5, (9,9) now [9]
1. (1,1) = 5, row insufficiency (1,3) = (1,8) = 8, (1,1) now [4,9]
2. (1,1) = 9, row insufficiency for [(3,[8,5]),(6,[5]),(8,[8,5])] wrt [5], (1,1) now [4]
3. 3x3 at (11): (1,3) = 8 inconsistent with (2,2) = 8, (1,3) now [5]
4. (1,6) = 5 inconsistent with (1,3) = 5, (1,6) now [9]
5. (1,8) = 5 inconsistent with (1,3) = 5, (1,8) now [8]
6. 3x3 at (11): (2,3) = 1 inconsistent with (3,1) = 1, (2,3) now [2,5]
7. (2,3) = 5 inconsistent with (1,3) = 5, (2,3) now [2]
8. 3x3 at (14): (2,4) = 4 inconsistent with (3,6) = 4, (2,4) now [5]
9. (2,6) = 5 inconsistent with (2,4) = 5, (2,6) now [1]
10. (2,7) = 2 inconsistent with (2,3) = 2, (2,7) now [3,4,1]
11. (2,7) = 1 inconsistent with (2,6) = 1, (2,7) now [3,4]
12. (2,9) = 5 inconsistent with (2,4) = 5, (2,9) now [2,3]
13. (2,7) = 3, row insufficiency (2,3) = (2,9) = 2, (2,7) now [4]
14. (2,9) = 2 inconsistent with (2,3) = 2, (2,9) now [3]
15. 3x3 at (11): (3,3) = 6 inconsistent with (2,1) = 6, (3,3) now [7,8,2]
16. 3x3 at (11): (3,3) = 8 inconsistent with (2,2) = 8, (3,3) now [7,2]
17. (3,3) = 2 inconsistent with (2,3) = 2, (3,3) now [7]
18. (3,4) = 7 inconsistent with (3,3) = 7, (3,4) now [8]
19. 3x3 at (14): (3,5) = 2 inconsistent with (1,4) = 2, (3,5) now [3,8]
20. (3,5) = 8 inconsistent with (3,4) = 8, (3,5) now [3]
21. (3,8) = 8 inconsistent with (3,4) = 8, (3,8) now [6]
22. (3,9) = 7 inconsistent with (3,3) = 7, (3,9) now [2,3]
23. (3,9) = 3 inconsistent with (3,5) = 3, (3,9) now [2]
24. (4,3) = 5 inconsistent with (1,3) = 5, (4,3) now [6,7]
25. (4,3) = 7 inconsistent with (3,3) = 7, (4,3) now [6]
26. (4,5) = 3 inconsistent with (3,5) = 3, (4,5) now [9]
27. (4,6) = 6 inconsistent with (4,3) = 6, (4,6) now [5,7,9]
28. (4,6) = 9 inconsistent with (4,5) = 9, (4,6) now [5,7]
29. (4,7) = 6 inconsistent with (4,3) = 6, (4,7) now [3]
30. (4,9) = 9 inconsistent with (4,5) = 9, (4,9) now [3,5,7]
31. (4,9) = 3 inconsistent with (4,7) = 3, (4,9) now [7,5]
32. 3x3 at (41): (5,1) = 5 inconsistent with (6,2) = 5, (5,1) now [3]
33. (5,2) = 1 inconsistent with (7,2) = 1, (5,2) now [7,3]
34. (5,2) = 3 inconsistent with (5,1) = 3, (5,2) now [7]
35. (5,5) = 3 inconsistent with (5,1) = 3, (5,5) now [8]
36. (5,8) = 8 inconsistent with (5,5) = 8, (5,8) now [1,5]
37. (5,8) = 5, column insufficiency (3,8) = (9,8) = 6, (5,8) now [1]
38. (5,9) = 3 inconsistent with (5,1) = 3, (5,9) now [5,7]
39. (5,9) = 7 inconsistent with (5,2) = 7, (5,9) now [5]
40. (4,9) = 5 inconsistent with (5,9) = 5, (4,9) now [7]
41. (4,6) = 7 inconsistent with (4,9) = 7, (4,6) now [5]
42. (6,1) = 4 inconsistent with (1,1) = 4, (6,1) now [9]
43. (6,3) = 6 inconsistent with (4,3) = 6, (6,3) now [1,7]
44. (6,3) = 7 inconsistent with (3,3) = 7, (6,3) now [1]
45. (6,4) = 9 inconsistent with (6,1) = 9, (6,4) now [4,7]
46. (6,4) = 4, row insufficiency (6,1) = (6,5) = 9, (6,4) now [7]
47. (6,5) = 9 inconsistent with (6,1) = 9, (6,5) now [4]
48. (6,7) = 1 inconsistent with (6,3) = 1, (6,7) now [6,4]
49. (6,7) = 4 inconsistent with (6,5) = 4, (6,7) now [6]
50. (7,1) = 2, column insufficiency (6,1) = (8,1) = 9, (7,1) now [5]
51. (7,5) = 8 inconsistent with (5,5) = 8, (7,5) now [2]
52. (7,6) = 1 inconsistent with (7,2) = 1, (7,6) now [6,5]
53. (7,6) = 5 inconsistent with (7,1) = 5, (7,6) now [6]
54. (7,7) = 2 inconsistent with (7,5) = 2, (7,7) now [8,1,6]
55. (7,7) = 1 inconsistent with (7,2) = 1, (7,7) now [8,6]
56. (7,7) = 6 inconsistent with (7,6) = 6, (7,7) now [8]
57. (8,1) = 9 inconsistent with (6,1) = 9, (8,1) now [2]
58. (8,3) = 1 inconsistent with (6,3) = 1, (8,3) now [8,7,2]
59. (8,3) = 7 inconsistent with (3,3) = 7, (8,3) now [8,2]
60. (8,3) = 2 inconsistent with (8,1) = 2, (8,3) now [8]
61. (8,4) = 7 inconsistent with (6,4) = 7, (8,4) now [9,8]
62. (8,4) = 8 inconsistent with (8,3) = 8, (8,4) now [9]
63. (8,6) = 1 inconsistent with (2,6) = 1, (8,6) now [7,9]
64. (8,6) = 9 inconsistent with (8,4) = 9, (8,6) now [7]
65. (8,7) = 2 inconsistent with (8,1) = 2, (8,7) now [8,1]
66. (8,7) = 8 inconsistent with (8,3) = 8, (8,7) now [1]
67. (9,4) = 5 inconsistent with (2,4) = 5, (9,4) now [4,9]
68. (9,4) = 9 inconsistent with (8,4) = 9, (9,4) now [4]
69. (9,7) = 6 inconsistent with (9,2) = 6, (9,7) now [2,4]
70. (9,7) = 4 inconsistent with (9,4) = 4, (9,7) now [2]
71. (9,8) = 6 inconsistent with (9,2) = 6, (9,8) now [5]
72. (9,9) = 2 inconsistent with (9,7) = 2, (9,9) now [9,5]
73. (9,9) = 5 inconsistent with (9,8) = 5, (9,9) now [9]