A computer program has beaten a human player at the ancient Chinese board game Go（围棋）. It marked an important advance for the     1     (develop) of artificial intelligence. The program,     2     (call) Alpha Go, had taught itself how to win. It beat the European player in all five games of a match in October. The developers say     3     (it) learning ability may someday let computers help solve real world problems. Those could include making medical diagnoses and     4     (explore) scientific research.

Previous computers have beaten humans in other games. But among classic games, Go has long been viewed as the most challenging game for artificial intelligence to master. Therefore, many people find it     5    (accept) when AlphaGo won the human player.

Go involves two players who take turns putting markers on a checkerboard-like grid (格子).   Players obtain the opponent’s pieces     6     surrounding them. The rules are simple,     7     playing it is not. It’s     8     (probable) the most complex game ever created by humans.

Martin Mueller, a computing science professor,     9     (work) on Go programs for 30 years. He once said, “The new program is really a big step up from everything else that we’ve seen. It’s a very     10     (amaze) piece of work.”