Is Rent Escalation Liquidated Damages Clause for Radius Clause Violation Enforceable?

Liquidated damages clauses can be a convenient way to incentivize performance and avoid disputes over the price tag of breaches. One common use of such clauses is to require the tenant to pay predetermined rent increases in the event it violates a covenant not to open a competing business within a specific radius of the leased property. But getting courts to enforce such a provision can be difficult, as illustrated by the scenario below.