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  • 20 Years Later, Humans Still No Match For Computers On The Chessboard

20 Years Later, Humans Still No Match For Computers On The Chessboard

  • Posted by Chess Rising Stars Academy
  • Categories World Chess News
  • Date 25th October 2016

Next month, there’s a world chess championship match in New York City, and the two competitors, the assembled grandmasters, the budding chess prodigies, the older chess fans — everyone paying attention — will know this indisputable fact: A computer could win the match hands down.

They’ve known as much for almost 20 years — ever since May 11, 1997. On that day, IBM’s Deep Blue defeated the great Garry Kasparov who, after an early blunder, resigned in defeat.

“I am ashamed by what I did at the end of this match. But so be it,” Kasparov said. “I feel confident that machine hasn’t proved anything yet.”

Kasparov’s confidence proved unjustified. In the years since, computers have built on Deep Blue’s 1997 breakthrough to the point where the battle between humans and machines is not even close. Even chess grandmasters like author and columnist Andrew Soltis know this to be true.

“Right now, there’s just no competition,” Soltis says. “The computers are just much too good.”

And as it turns out, some players prefer to stay away from computers as opponents, he says.

“The world champion Magnus Carlsen won’t even play his computer,” Soltis says. “He uses it to train, to recommend moves for future competition. But he won’t play it, because he just loses all the time and there’s nothing more depressing than losing without even being in the game.”

Magnus Carlsen, who’s Norwegian, defends his title against Sergey Karjakin of Russia, in November. Carlsen is 25. Karjakin, 26.

They have both arrived at the highest ranks of the game in an era when a $100 chess computer can easily dispose of them both. That superiority had been pursued and imagined for decades.

There was a chess match in the movie 2001: A Space Odyssey. HAL, the computer, versus Frank, the astronaut. The chess match in 2001: A Space Odyssy between HAL, the computer, and Frank, the astronaut.

But here’s the question. Do HAL’s real-life progeny — computers that can see 30 moves into the future — play the game differently? Do they have a style? Have they taught humans new strategies?

Murray Campbell of IBM was part of the Deep Blue project. As he says, chess computers do play differently. They make moves that sometimes make no sense to their human opponents.

“Computers don’t have any sense of aesthetics or patterns that are standard the way people learn how to play chess,” Campbell says. “They play what they think is the objectively best move in any position, even if it looks absurd, and they can play any move no matter how ugly it is.”

Human chess players bring preconceptions to the board; computers are unbound by habit. And, unlike people, computers love to retreat, Soltis says.

“And if you see a game in which one of the players is doing a lot of retreating mysteriously and so on, and the game goes on forever and ever, that’s a computer,” he says.

Susan Polgar is a grandmaster and a six-time national collegiate champion chess coach. Computers do all that retreating, she says, because they’re not slaves to human nature. Humans, she says, don’t like to admit a mistake unless they really have to.
“And in those borderline cases when it’s not obvious that you have to retreat, chess players tend to not like to retreat,” Polgar says. “Let’s say you move a knight forward towards your opponent’s king, attacking. Unless you absolutely have to retreat, you rather try to follow up that attack by bringing more pieces to attack your opponent’s king.”

Computers display no such stubbornness. “A computer, if it calculates that the best move is to retreat, it has absolutely no psychological boundaries holding it back from retreating,” Polgar says.

One of the human players in November’s match, Magnus Carlsen, the world champion, was described as playing a very un-computer like game of chess. Polgar says this means Carlsen can win with different kinds of strategy, and he might choose his strategy based on what he knows about his opponent.

“Against one opponent that loves having queens on the board — the most dangerous attacking piece — he would make sure, you know, try to get rid of the queens as soon as possible and put his opponent in a more uncomfortable setting on the chessboard,” Polgar says.

To the great human chess champion, understanding the foibles of his foe can be a key to victory. To a computer, all opponents look the same. “I think many of the common board games don’t have the unknown element in it,” Campbell says. “They may have chance elements. A game like backgammon, for example, there’s roll of the dice, but you can calculate the probabilities quite accurately. When there’s unknowns, there’s things … just are hidden from you, and even the alternatives, the things you can do, can’t be set down and enumerated. There’s maybe too many possible actions you can take. That’s the challenge for modern artificial intelligence research.”

Meanwhile, back at the chessboard, two of the best human players in the world — Carlsen and Karjakin — play their championship in Manhattan’s South Street Seaport, starting Nov. 11.

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