4 ms·

Assuming the solvers that they wrote searched the problem space correctly, the hard side probably violates some assumption. My guess would be that on the hard s

by shard 11y ago

Assuming the solvers that they wrote searched the problem space correctly, the hard side probably violates some assumption. My guess would be that on the hard side the pieces can lock into some sort of 3D structure.

throwaway_yy2Di 11y ago
Maybe the rotation angles aren't simple multiples of 60°.
- aetherson 11y ago
  That sounds more "honest" than using 3d.
- mcphage 11y ago
  Or for that matter, the placement might not be at integral coordinates.