Prison Break

Played for some time and can't say I found a route to the win without some tricks. Are tricks part of the intended way?

You can get out in two ways.

This level is inspired by a film in 1995.

Spoiler: shortcut

Andy dig a tunnel from his cell

Nice level although I didn't found a very good solution imho... Thanks!

Spoiler

I guided Rs to the last zone before the win to block the zapper and then cross that area quickly to the win with B.

Spoiler: Hint

1. Other than the bad zapping guards, some prisoners are equally dangerous. So not to let them out when you are figuring the route;
2. There is a short window to go through the inner yard guard, the gate guard should be blocked at beginning if you want to go through the gate;
3. In the film, Andy crawled through a long dark tunnel and set himself free. The redemption is within.
4. B has needs some courage to step in the tunnel dig by himself.