The ESL Challenger League Season 51: South America - Cup #2 is a sub-regional competition that serves as part of the broader ESL Challenger League ecosystem for Counter-Strike 2 (CS2). This specific cup is one of several qualifiers that determine which South American teams can advance to higher stages of the ESL Challenger League Season 50 or potentially secure a path to international LAN events like ESL Challenger and ESL Pro League.