Treeningpartner / Pühajärve Chess Club is an Estonian chess club and tournament organizer based in Tallinn, Estonia. It operates as a sports association that supports over-the-board chess nationwide. Moreover, it is best known for delivering large, well-attended festival weekends.

The club runs FIDE-rated tournaments across classical chess, rapid chess, and blitz chess formats. In addition, it organizes the Tartu Chess Festival, including the 3rd Tartu Chess Festival 2026 in Tartu. Furthermore, its event portfolio also includes open weekends and youth-focused competitions with strong international participation.

At the same time, the club emphasizes clear regulations, fair play, and player-friendly logistics. As a result, it attracts both ambitious juniors and experienced competitors. Moreover, it works closely with local partners and sponsors to strengthen each chess festival experience.