Perhaps they used an instrument like...
what is found in this video (www.adrokgroup.com/technology/how-it-works-details) to determine where to drill the 10 new 1000 meter each "game changing" drill holes. They will use electromagnetic imaging down each borehole. They should get a great idea of what is there. I wonder where exactly (they say it is right by Timok) the exploration is and how far apart are the boreholes. I don't know if it is game changing but pretty sure it will be pretty impressive as they went out on limb saying that it could be "game changing". These guys cannot afford any more blunders...