### 111 Nails & Glue Puzzles

Here are 111 puzzles sorted by difficulty (more or less). For each problem I report the size of the board and the fixed pieces contained. The symbol means that the problem has only one target cell.
1. 3×3 (5 moves)
2. 4×4 (5 moves)
3. 3×3 (6 moves)
4. 3×3 (6 moves)
5. 3×3 (6 moves)
6. 4×4 (6 moves)
7. 5×5 (6 moves)
8. 5×5 (6 moves)
9. 3×3 (7 moves)
10. 4×4 (7 moves)
11. 4×4 (7 moves)
12. 4×4 (7 moves)
13. 4×4 (7 moves)
14. 5×5 (7 moves)
15. 5×5 (7 moves)
16. 4×4 (8 moves)
17. 4×4 (8 moves)
18. 4×4 (8 moves)
19. 4×4 (8 moves)
20. 4×4 (8 moves)
21. 5×5 (8 moves)
22. 5×5 (8 moves)
23. 3×3 (9 moves)
24. 4×4 (9 moves)
25. 4×4 (9 moves)
26. 4×4 (9 moves)
27. 4×4 (9 moves)
28. 4×4 (9 moves)
29. 4×4 (9 moves)
30. 5×5 (9 moves)
31. 3×3 (10 moves)
32. 4×4 (10 moves)
33. 4×4 (10 moves)
34. 4×4 (10 moves)
35. 4×4 (10 moves)
36. 4×4 (10 moves)
37. 5×5 (10 moves)
38. 5×5 (10 moves)
39. 3×3 (11 moves)
40. 4×4 (11 moves)
41. 4×4 (11 moves)
42. 4×4 (11 moves)
43. 4×4 (11 moves)
44. 5×5 (11 moves)
45. 5×5 (11 moves)
46. 5×5 (11 moves)
47. 4×4 (12 moves)
48. 4×4 (12 moves)
49. 4×4 (12 moves)
50. 4×4 (12 moves)
51. 5×5 (12 moves)
52. 5×5 (12 moves)
53. 4×4 (13 moves)
54. 4×4 (13 moves)
55. 4×4 (13 moves)
56. 5×5 (13 moves)
57. 4×4 (14 moves)
58. 4×4 (14 moves)
59. 4×4 (14 moves)
60. 5×5 (14 moves)
61. 5×5 (14 moves)
62. 5×5 (14 moves)
63. 4×4 (15 moves)
64. 4×4 (15 moves)
65. 4×4 (15 moves)
66. 4×4 (16 moves)
67. 4×4 (16 moves)
68. 4×4 (16 moves)
69. 4×4 (16 moves)
70. 5×5 (16 moves)
71. 5×5 (16 moves)
72. 4×4 (17 moves)
73. 4×4 (17 moves)
74. 4×4 (17 moves)
75. 4×4 (18 moves)
76. 4×4 (18 moves)
77. 5×5 (18 moves)
78. 4×4 (19 moves)
79. 4×4 (19 moves)
80. 5×5 (19 moves)
81. 5×5 (19 moves)
82. 4×4 (20 moves)
83. 5×5 (20 moves)
84. 5×5 (20 moves)
85. 5×5 (20 moves)
86. 6×6 (20 moves)
87. 4×4 (21 moves)
88. 5×5 (21 moves)
89. 4×4 (22 moves)
90. 5×5 (22 moves)
91. 6×6 (22 moves)
92. 4×4 (23 moves)
93. 5×5 (23 moves)
94. 4×4 (24 moves)
95. 5×5 (24 moves)
96. 5×5 (24 moves)
97. 5×5 (24 moves)
98. 4×4 (25 moves)
99. 5×5 (25 moves)
100. 4×4 (26 moves)
101. 5×5 (26 moves)
102. 4×4 (27 moves)
103. 5×5 (27 moves)
104. 5×5 (27 moves)
105. 5×5 (27 moves)
106. 4×4 (28 moves)
107. 6×6 (28 moves)
108. 5×5 (29 moves)
109. 5×5 (29 moves)
110. 5×5 (29 moves)
111. 6×6 (32 moves)