Looking to Source Fence Gate Locks for Tennis Courts

We need to locate locks for our tennis courts. We attempted to add a keypad lock to the gate, but the gates have enough space in them that someone can easily reach their arm up and open them from the inside. I'd like to fine a chain with a combination lock that is permanently attached to the chain and can't be removed. Does anyone know of this type of product or some other simple solution?

Avoid any kind of lock that prevents people from leaving, even if they are trespassers. Generally, you cannot detain a person unless you intend to arrest him and what you can arrest a person for may be limited by state statutes.

Keeping a person inside could subject your HOA to civil damages. For example: granny goes looking for her cat late at night and thinks she sees the cat on the tennis court. She goes in to get the cat. Someone else locks the gate with her inside. She cannot get out, has a heart attack, and dies. Remote, yes, but possible. The law does not permit you to impose a death penalty for trespassing on the tennis court.

Having free access to exit once inside a fenced-in yet otherwise open space (no roof/ceiling/etc.) such as around a pool & patio deck is not mandatory nationwide. Our gate is key access both ways. If you have a key to get in you have one to exit.

Sorry Jay I mean't you not me (I no narcissist)