Matrix Games and Strategic Studies Group have issued a new patch for Kharkov: Disaster on the Donets, bringing to v1.1 this World War II operational strategy game, designed to be the successor to both Decisive Battles and Battlefront designs. This update includes nearly twenty significant improvements to the Kharkov game system. Among others, it adds variant units with differences in strength and OOB to the Mystery Variant system and allows entirely new "what if" formations like the 3rd Guards Rifle Corps to be part of the scenario variants. Also, the rules to refit a unit have changed to an explicit action by the player using a new refit button. Finally, the update comes with restrictions on viewing enemy OB screens have been implemented to prevent giving away the new variant unit information, along with more new features, rule tweaks, and several bug fixes.