Tournytest

 was the inaugral tournament of the Big Data Series, sanctioned by his glorious majesty, King MCM the First. It took place on July 27–28, 2017, pitting the top 16 participants of BGS Rated (based on their MMR) in a group stage followed by a knockout bracket, all matches being best-of-5. Seld came out the victor, and despite having some close matchups in the group stage, swept all three series of the final knockout bracket to become the first BDS tournament winner.

Participants
At the time the tournament was announced, the 16 players with the highest MMR were placed in to this tournament. They are as follows

Format
The tournament starts with four pots of four being distributed in to four groups of four in the hopes that each group will have roughly the same ability distribution. In those four groups, each participant faces the others in a best of five series and scores points, 3 for a series win, 0 for a series loss, and 1 for each game where the participant won by five or more goals. To braek ties in groups, the winner of the series between the two tieing players will be placed higher.

The top two from each group advance to the knockout stage, which starts with 2 pots of 4 players. The first pot consist of those who scored first place in the group stage, and so on. Each initial match in the knockout bracket then has one player from each pot. The knockout bracket also features a best of five. A winner is crowned and awarded the tag "Tournytest winner", which is meaningless at the moment.

Summary
Ele was a huge upset, and finished bottom of his group despite being in pot 1. He was swept by Deax in his first series, then suffered a 3–1 loss to AwfulEel, who won by more than five goals on two occassions, then looked strong in his first game of his final series with a 10–5, only to be swept once more. He was the only participant from pot 1 to not finish top of his group. AwfulEel was the beneficiary and had an impressive showing, from pot 3 to position 1. No one from pot 4 advanced, although Oliver Anzalone came close with a great showing. Lingstan, considered the greatest at this point, struggled to beat both Numbers Mcpartland and BM, the latter of which had the lowest MMR coming in to the tournament – 76 behind Lingstan.