Skild taught a humanoid soccer via self-play — 140 simulated years, no human demos

lukas_m_ziegler · x · 2026-09-29

Skild AI used self-play to teach a humanoid robot soccer, with no hand-crafted rewards and no human demonstrations for the advanced behaviors.

After 140 simulated years of playing against itself, the robot learned to dribble past defenders, shield the ball and tackle opponents, then the policy was transferred to a real robot.

The rationale: imitation learning caps robots at human capability, whereas self-play is how AlphaGo beat humans at Go — and Skild sees it as the path to physical AGI.

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