Catch Goblin- Cops and Robbers

Quick, there's a wicked thief surrounded by brave police officers, come and help the police catch the thief!
Gameplay:
The player controls the police to surround the thief. In each round, only one character from the police and one from the thief can move, and each can only move one step at a time. By controlling the police to surround the thief with no escape, you can catch the thief and win the game.
Be careful, if the thief reaches the safe exit, you lose!