Developer Builds 'Grapple Dojo,' a Chess-Style BJJ Training Game with 3D Animations

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A developer has launched Grapple Dojo, a browser-based game designed to help Brazilian jiu-jitsu practitioners train off the mats through strategy and positional recall. The game is powered by Eelis van der Weegen's GrappleMap dataset, which catalogs 843 positions and 1,485 transitions sourced from instructionals by notable grapplers including Marcelo Garcia and Eddie Bravo. Key features include a 3D move viewer, a virtual open mat with an interactive dummy, active recall duels, and a stat-tracking system tied to a belt-rank curriculum. The project is currently in active development, with the creator working on improved move validation, better 3D models, and bug fixes. Grapple Dojo is freely accessible online and described by its creator as a gamification of the existing GrappleMap data.

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