Garry cringed, like someone just spit in his breakfast. Pawn to f5. Blue remained silent, like it just spit in someone else’s breakfast. Rook to e7: taking Garry’s queen. This was Game 6, but Garry had already lost his nerve when Blue beat him at the end of Game 2, and they’ve been drawing ever since. Garry made the move that would be his last. Bishop to e7: taking the rook that took his queen. Blue responded. Pawn to c4. Garry quickly recognized this was a set-up for Blue to invade with its queen — and knew there was no hope after that.

Garry Kasparov resigned, in less than 20 moves. On May 11th, 1997, IBM’s Deep Blue became the first AI to beat a human World Chess Champion.

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