This year's contest features a challenging task in the field of optimistic concurrency control for databases.

To spare you the boring parts we already provide working implementations in C++, Java, Go and Rust! Simply register, try our implementations, improve them, and work your way to the top of our leaderboard. The top-5 best-ranking undergrad or grad student teams are invited to the ACM SIGMOD 2015 conference in Melbourne, with the best one winning a $5,000 prize.