Four Nations Chess League (4NCL) is a national chess league organization based in the United Kingdom. It delivers elite and ambitious team competition across England, Scotland, Wales, and Ireland through a hotel weekend league model. Moreover, it operates as a highly experienced tournament organizer within British over-the-board chess.

In addition, 4NCL manages its flagship league season and related events through an active management team. The competition is closely linked to classical chess team play, while its wider ecosystem can include congress-style events and other rated competitions. Furthermore, 4NCL supports a strong pathway for titled and club players who want a serious open chess tournament environment in a team format.

Furthermore, the organization emphasizes clear regulations, reliable scheduling, and fair play standards across its events. As a result, it remains a key destination for competitive weekend chess in the UK.