Remember where objects are placed on the grid, then recreate the layout from memory. Tests allocentric spatial memory — strongly hippocampus-dependent.
Scientific Background
Based on: Object Placement Memory — Allocentric Spatial Memory and Hippocampal Place Representation (Milner, 1965; Morris et al., 1982; Bohbot et al., 2004; Iaria et al., 2003) (Lezak et al., 2012)