openingUsed

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: openingUsed

Indicates that a particular opening (such as a move sequence, strategy, or initial configuration) is employed or selected in a given context or instance.