Funnel board

The Funnel board task is a domain where a ball falls through a grid of obstacles onto one of five platforms. Every other row of obstacles consists of funnel-shaped objects, which are meant to capture the ball and release it at a well-defined exit position. Variety arises from the random rotations of the sliders, from the random presence or absence of funnels in every layer except for the last one, and from slight perturbations in the funnel and slider positions.