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MON, 5 OCT · 80 ITEMS
"AI finally beat the best Stratego player in history and did it on a budget" — Hacker News (best) · AI & Technology
Researchers from Carnegie Mellon, MIT, NYU, and Stanford developed an AI system called that defeated Pim Niemeijer, a four-time world champion and widely considered the best player ever, by a score of 15 games to 1. Stratego is a game of (players' pieces are hidden), which has historically been very challenging for AI. The achievement is notable because Ataraxos was built with limited computational resources, unlike previous efforts by DeepMind and others. The work is published in Nature.
The claim is solid: it is based on a peer-reviewed paper in Nature (s41586-026-11036-y) and reported by multiple outlets including Ars Technica, which interviewed the researchers. The match results and the AI's resource efficiency are described in the paper and confirmed by the reporting.
Genuinely new: the Nature paper was published and the story broke in October 2026.