This handout picture taken in an unknown location released on February 11, 2026 digital model of object 04433 using a visualisation of the depth map, demonstrating lower surfaces (pink). A smooth, white stone dating from the Roman era and unearthed in the Netherlands has long baffled researchers. Now with the help of artificial intelligence, scientists believe they have cracked the mystery: the stone is an ancient board game and they have even guessed the rules. (Photo by Handout / Antiquity / AFP via Getty Images) / RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT "AFP PHOTO / HANDOUT / ANTIQUITY " - HANDOUT - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS