[2] It was announced on January 15, 2015, that Naver, Korea's largest search engine, would sponsor the first SSL tournament.

Throughout its three-year history, the SSL has gone through multiple large format changes of both leagues.

The winners of each match move on to the main event and the losers fall out of the league and have to participate in the general qualifiers again.

In Season 2, the main event's format reverted to that of 2015, with a group stage and playoffs starting with best of five quarterfinals, then best of seven semifinals and finals.

10 players play in a large round robin of the regular season, called the Pennant Race.

Due to the extensive format changes, Challenge awards money for each match instead of overall placement.

[citation needed] In addition, all players that lose in the Challenge League and do not proceed to the main event are awarded 200,000 KRW each.

[citation needed] The prize pool for each season in 2016 awarded a total of 134,000,000 KRW for the main event.

[citation needed] In 2017, the tournament once again underwent big format and prize pool changes.