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A man-versus-machine showdown on popular US quiz show Jeopardy! ended in a tie on the first day of a three-day challenge, when an IBM computer showed off its knowledge of the Beatles, as well as a few glitches.

The machine, dubbed Watson after International Business Machines Corp's former president Thomas Watson, is the computer and software maker's latest display of its expertise in advanced science.

Watson's ability to understand language and solve problems through complex algorithms makes it even more evolved than Deep Blue, an IBM chess-playing supercomputer that beat world champion Garry Kasparov in 1997.

"Any time you feel the pain, hey - this guy - Don't carry the world upon your shoulders," was one clue posed by host Alex Trebek on Monday's show.

"Who is Jude?" answered Watson, following the show's trademark question-as-an-answer style.

It also gave correct responses to clues about the Italian Renaissance artist Michelangelo and US Olympic swimming champion Michael Phelps.

But Watson also made some errors, coming up with the wrong Latin word for "terminal" and repeating another contestant's mistake because it can't interact with other players.

In an earlier practice session, it mistakenly named Beethoven instead of actor and musician Jamie Foxx, prompting contestant Brad Rutter to quip: "I get the two mixed up all the time." Watson didn't laugh, revealing what some say is another flaw - the lack of a sense of humor.

At the end of Monday's half-hour show, Watson and Rutter, who has in previous appearances won a total of $3.3 million, were tied with $5,000 each.

In third place with $2,000 was Ken Jennings, who won 74 games in a row during the show's 2004-2005 season.

The final showdown airs on Wednesday, with contestants vying for a grand prize of $1 million. IBM plans to donate all of Watson's winnings to charity.

IBM spends around $6 billion a year on research and development. An unspecified part of that goes to what it calls "grand challenges," or big, multiyear science projects such as Watson and Deep Blue.

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（中国日报网英语点津 Helen 编辑）

Todd Balazovic is a reporter for the Metro Section of China Daily. Born in Mineapolis Minnesota in the US, he graduated from Central Michigan University and has worked for the China Daily for one year.