A direct 300-game head-to-head between the v1.2.0 champion and the v1.3.0 champion (512 sims per move, human-opening book) came out +29 Elo in favor of the v1.2.0 net, which also holds the raw external benchmark record. This release restores that net as champion.pt so the latest release always ships the strongest known weights. The v1.3.0 net remains in service where its human-opening profile is strongest.
champion.pt attached (TorchScript, 20 input planes, auto-detected by webserve).