MicroWorld CAPTCHAPOC

seed —

world rules

…

Preparing the world…

Human detected

Solved in — · — move(s)

seed —

Deterministic seed → scene. Verification is pure line-of-sight geometry over the occluders (<1 ms), no ML. In production the same verify(seed, action) runs server-side. Human cost ≈ 3 s; machine cost ≫ verification cost.