In graph pebbling, a configuration assigns a nonnegative integer number of pebbles to each graph vertex. A pebbling move is a move that removes two pebbles from one vertex and places one pebble on an adjacent vertex, with the second pebble discarded.
Pebbling Move
See also
Graph Pebbling, Pebbling NumberExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Pebbling Move." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/PebblingMove.html