A champion Go player scored his first win over a Go-playing computer program on Sunday after losing three straight times in the ancient Chinese board game, saying he finally found weaknesses in the software.
Lee Sedol's victory over AlphaGo is a reminder that Google's Go-playing program — the first computer system to defeat a top Go player — has room for improvement despite winning the first three matches in the best-of-five series and the $1 million prize, which will be donated to charity. The computer program was developed by Google DeepMind two years ago.
"This one win is so valuable and I will not trade this for anything in the world," Lee, one of the best Go players in the world, said with a smile after entering the post-match news conference at a Seoul hotel to applause from journalists.
Lee had said earlier in the series, which began last week, that he was unable to beat AlphaGo because he could not find any weaknesses in the software's strategy.