What's new in 2019?
Elven anachrononauts have been banned from the tournament (because their starting inventory makes them too good at grinding Medusa kills).
What's new 2018?
NetHack 1.3d, the first version of NetHack ever released, is again part of the tournament. It is playable on the hardfought.org public servers.
UnNetHack has a lot of new achievements. Essentially killing a unique monster will earn an achievement and killing every unique of certain classes (e.g. riders or quest leaders) will earn you an additional achievement.
Clan admins can set a banner for their clans.
The clan trophy for log(points) has been dropped, as it was too easily abused. A replacement is planned but not yet finished.
Likewise with the number of variants in the tournament, the cross-variant achievements will need some adjustements.