Graph Golf

The Order/degree Problem Competition

Find a graph that has smallest diameter & average shortest path length given an order and a degree.



Update 2019-11-29


Graph Golf 2019, an online programming competition in the field of graph theory since 2015 seeking for small-diameter graphs, has successfully finished! The top-ranked challengers will be invited and awarded in an international conference held on Nov. 26 in Nagasaki, Japan. You are welcome to attend the conference!

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Graph design has a rich variety of application fields of computer systems. In particular, it is just meeting a network design of future supercomputers and future high-end datacenters in terms of hop counts, since their networks are topologically modeled as undirected regular graphs. Low latency is preconditioned on small hop counts, but existing network topologies have hop counts much larger than theoretical lower bounds. Therefore, computer network designers desire to find a graph that has a small number of hops between any pair of nodes. How to minimize the diameter and the average shortest path length (ASPL) of a graph given the order (the number of nodes) and the degree (the number of edges at each node)?

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Graph Golf is an international competition of the order/degree problem since 2015. It is conducted with the goal of making a catalog of smallest-diameter graphs for every order/degree pair. Anyone in the world can take part in the competition by submitting a graph. Outstanding authors are awarded in CANDAR'19, an international conference held in Nagasaki, Japan, in November 2019.

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Let me challenge!

The 2019 contest has finished. We are planning the 2020 contest. Stay tuned!

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