“Deep Blue . . . a chess-playing computer developed by IBM . . . was the first machine to win a chess game against a reigning world champion (Garry Kasparov) under regular time controls. . . .

Deep Blue was then heavily upgraded (unofficially nicknamed “Deeper Blue”) and played Kasparov again in May 1997, winning the six-game rematch 3.5–2.5. . . . Deep Blue thus became the first computer system to defeat a reigning world champion in a match under standard chess tournament time controls. . . .

After the lost match, Kasparov said that he sometimes saw deep intelligence and creativity in the machine’s moves, which he could not understand. He also suggested that humans may have helped the machine during the match. He demanded a rematch, but IBM declined and retired Deep Blue. In 2003 a documentary film was made that explored these claims titled Game Over: Kasparov and the Machine. . . .

In part these allegations were correct. The rules provided for the developers to modify the program between games, an opportunity they took with abandon. The code was modified between games to understand Kasparov’s play style better, allowing it to avoid a trap in the final game that the AI had fallen for twice before.”

—from Wikipedia. This means it’s probably fairly accurate. I saw Game Over a few months ago, and if you like chess or the color blue, I recommend it!