The full scope of high-level no-gi grappling divided into 19 major systems a well-rounded athlete needs competency in. Each has its own page, growing in depth over time.

The choice of 19 is mine and it isn't universally agreed — another coach would cut the sport slightly differently.

A full interactive network diagram showing the 167 directional relationships between systems is in development. For now, the listing below is the structural index.