Answer: Maze 410

Here is the way through Maze 410. The orange line shows Beep’s route from the top-left corner to the gold star.

The route as arrow code

Each arrow is a direction and each number is how many squares to move. The whole route is 334 moves long and has 198 turns.

↓ 1  → 1  ↑ 1  → 11  ↓ 1  ← 1  ↓ 2  → 2  ↓ 2  ← 1  ↑ 1  ← 1  ↓ 1  ← 1  ↑ 4  ← 3  ↓ 3  ← 3  ↓ 2  ← 1  ↓ 2  → 1  ↑ 1  → 1  ↑ 2  → 1  ↓ 1  → 1  ↑ 1  → 1  ↑ 1  → 1  ↓ 2  → 1  ↓ 2  → 4  ↑ 2  → 1  ↑ 1  → 2  ↓ 3  → 2  ↑ 1  ← 1  ↑ 1  → 2  ↑ 1  → 3  ↑ 1  ← 3  ↑ 3  → 1  ↑ 1  → 2  ↓ 1  → 1  ↓ 6  ← 1  ↓ 2  ← 3  ↓ 1  ← 3  ↑ 1  ← 7  ↓ 2  ← 1  ↑ 1  ← 1  ↑ 2  → 1  ↑ 1  ← 3  ↓ 4  ← 1  ↑ 1  ← 2  ↑ 1  ← 1  ↓ 3  ← 1  ↓ 1  ← 1  ↓ 5  → 1  ↓ 1  ← 1  ↓ 1  → 5  ↓ 1  ← 3  ↓ 1  ← 1  ↑ 1  ← 1  ↓ 3  → 4  ↑ 2  → 2  ↑ 2  → 1  ↓ 4  → 2  ↑ 1  → 1  ↑ 1  → 1  ↓ 1  → 1  ↓ 1  → 2  ↑ 1  ← 1  ↑ 2  ← 2  ↑ 1  ← 3  ↑ 1  → 2  ↑ 1  → 1  ↑ 1  → 1  ↑ 3  → 3  ↑ 1  ← 1  ↑ 1  ← 2  ↑ 1  ← 1  ↑ 1  → 5  ↓ 1  → 1  ↓ 1  ← 1  ↓ 1  → 1  ↓ 1  ← 1  ↓ 1  ← 3  ↓ 3  → 1  ↑ 1  → 2  ↓ 2  ← 1  ↓ 2  → 2  ↑ 1  → 3  ↑ 1  → 2  ↑ 2  ← 3  ↓ 2  ← 1  ↑ 1  ← 1  ↑ 1  → 1  ↑ 2  → 1  ↓ 1  → 1  ↑ 1  → 1  ↓ 1  → 1  ↑ 2  → 1  ↑ 1  ← 2  ↓ 1  ← 2  ↑ 1  → 1  ↑ 1  ← 2  ↑ 1  → 3  ↓ 1  → 1  ↑ 1  → 1  ↓ 1  → 1  ↓ 3  ← 1  ↓ 4  → 1  ↓ 1  ← 2  ↓ 1  → 1  ↓ 2  → 1  ↓ 1

Show the route step by step

1. Go down 1 square.
2. Go right 1 square.
3. Go up 1 square.
4. Go right 11 squares.
5. Go down 1 square.
6. Go left 1 square.
7. Go down 2 squares.
8. Go right 2 squares.
9. Go down 2 squares.
10. Go left 1 square.
11. Go up 1 square.
12. Go left 1 square.
13. Go down 1 square.
14. Go left 1 square.
15. Go up 4 squares.
16. Go left 3 squares.
17. Go down 3 squares.
18. Go left 3 squares.
19. Go down 2 squares.
20. Go left 1 square.
21. Go down 2 squares.
22. Go right 1 square.
23. Go up 1 square.
24. Go right 1 square.
25. Go up 2 squares.
26. Go right 1 square.
27. Go down 1 square.
28. Go right 1 square.
29. Go up 1 square.
30. Go right 1 square.
31. Go up 1 square.
32. Go right 1 square.
33. Go down 2 squares.
34. Go right 1 square.
35. Go down 2 squares.
36. Go right 4 squares.
37. Go up 2 squares.
38. Go right 1 square.
39. Go up 1 square.
40. Go right 2 squares.
41. Go down 3 squares.
42. Go right 2 squares.
43. Go up 1 square.
44. Go left 1 square.
45. Go up 1 square.
46. Go right 2 squares.
47. Go up 1 square.
48. Go right 3 squares.
49. Go up 1 square.
50. Go left 3 squares.
51. Go up 3 squares.
52. Go right 1 square.
53. Go up 1 square.
54. Go right 2 squares.
55. Go down 1 square.
56. Go right 1 square.
57. Go down 6 squares.
58. Go left 1 square.
59. Go down 2 squares.
60. Go left 3 squares.
61. Go down 1 square.
62. Go left 3 squares.
63. Go up 1 square.
64. Go left 7 squares.
65. Go down 2 squares.
66. Go left 1 square.
67. Go up 1 square.
68. Go left 1 square.
69. Go up 2 squares.
70. Go right 1 square.
71. Go up 1 square.
72. Go left 3 squares.
73. Go down 4 squares.
74. Go left 1 square.
75. Go up 1 square.
76. Go left 2 squares.
77. Go up 1 square.
78. Go left 1 square.
79. Go down 3 squares.
80. Go left 1 square.
81. Go down 1 square.
82. Go left 1 square.
83. Go down 5 squares.
84. Go right 1 square.
85. Go down 1 square.
86. Go left 1 square.
87. Go down 1 square.
88. Go right 5 squares.
89. Go down 1 square.
90. Go left 3 squares.
91. Go down 1 square.
92. Go left 1 square.
93. Go up 1 square.
94. Go left 1 square.
95. Go down 3 squares.
96. Go right 4 squares.
97. Go up 2 squares.
98. Go right 2 squares.
99. Go up 2 squares.
100. Go right 1 square.
101. Go down 4 squares.
102. Go right 2 squares.
103. Go up 1 square.
104. Go right 1 square.
105. Go up 1 square.
106. Go right 1 square.
107. Go down 1 square.
108. Go right 1 square.
109. Go down 1 square.
110. Go right 2 squares.
111. Go up 1 square.
112. Go left 1 square.
113. Go up 2 squares.
114. Go left 2 squares.
115. Go up 1 square.
116. Go left 3 squares.
117. Go up 1 square.
118. Go right 2 squares.
119. Go up 1 square.
120. Go right 1 square.
121. Go up 1 square.
122. Go right 1 square.
123. Go up 3 squares.
124. Go right 3 squares.
125. Go up 1 square.
126. Go left 1 square.
127. Go up 1 square.
128. Go left 2 squares.
129. Go up 1 square.
130. Go left 1 square.
131. Go up 1 square.
132. Go right 5 squares.
133. Go down 1 square.
134. Go right 1 square.
135. Go down 1 square.
136. Go left 1 square.
137. Go down 1 square.
138. Go right 1 square.
139. Go down 1 square.
140. Go left 1 square.
141. Go down 1 square.
142. Go left 3 squares.
143. Go down 3 squares.
144. Go right 1 square.
145. Go up 1 square.
146. Go right 2 squares.
147. Go down 2 squares.
148. Go left 1 square.
149. Go down 2 squares.
150. Go right 2 squares.
151. Go up 1 square.
152. Go right 3 squares.
153. Go up 1 square.
154. Go right 2 squares.
155. Go up 2 squares.
156. Go left 3 squares.
157. Go down 2 squares.
158. Go left 1 square.
159. Go up 1 square.
160. Go left 1 square.
161. Go up 1 square.
162. Go right 1 square.
163. Go up 2 squares.
164. Go right 1 square.
165. Go down 1 square.
166. Go right 1 square.
167. Go up 1 square.
168. Go right 1 square.
169. Go down 1 square.
170. Go right 1 square.
171. Go up 2 squares.
172. Go right 1 square.
173. Go up 1 square.
174. Go left 2 squares.
175. Go down 1 square.
176. Go left 2 squares.
177. Go up 1 square.
178. Go right 1 square.
179. Go up 1 square.
180. Go left 2 squares.
181. Go up 1 square.
182. Go right 3 squares.
183. Go down 1 square.
184. Go right 1 square.
185. Go up 1 square.
186. Go right 1 square.
187. Go down 1 square.
188. Go right 1 square.
189. Go down 3 squares.
190. Go left 1 square.
191. Go down 4 squares.
192. Go right 1 square.
193. Go down 1 square.
194. Go left 2 squares.
195. Go down 1 square.
196. Go right 1 square.
197. Go down 2 squares.
198. Go right 1 square.
199. Go down 1 square.

Why is there only one way through?

This is a perfect maze. That means there is exactly one path between any two squares, with no loops. It was built by a program that wanders from square to square, knocking down walls as it goes, and backs up whenever it gets stuck. Programmers call that backing-up trick backtracking.

Because there are no loops, the path in the answer is the only way to get from the start to the goal.