Merrit Kennedy

A year after a computer beat a human world champion in the ancient strategy game of Go, researchers say they have constructed an even stronger version of the program — one that can teach itself without the benefit of human knowledge.

The program, known as AlphaGo Zero, became a Go master in just three days by playing 4.9 million games against itself in quick succession.

Café Hacienda San Pedro, a trendy coffee shop in San Juan, is buzzing. A long line snakes through it. People are chatting; dogs sit snoozing. Everything looks normal.

But in a few months, it probably won't.

After a cyberattack that potentially exposed the personal information of 143 million people, the credit reporting agency Equifax set up www.equifaxsecurity2017.com, a website to help people determine whether they had been affected.

However, on multiple occasions over the span of weeks, the company's official Twitter account responded to customer inquiries by apparently directing them to a fake phishing site called www.securityequifax2017.com.

Updated at 5:30 a.m. ET Wednesday

Even though Maria has weakened to a Category 4 storm, it remains a dangerous hurricane. Maria's maximum sustained winds are near 155 mph. The National Hurricane Center says the storm should keep that intensity until it makes landfall. Puerto Rico has long been spared from a direct hit by a hurricane.

Updated at 2:20 a.m. ET Wednesday

Updated 10:10 p.m. ET

A Utah nurse and her attorney have released video footage showing an officer roughly arresting her at University of Utah Hospital in Salt Lake City. They say it amounts to assault.

The video shows an officer aggressively handcuffing nurse Alex Wubbels after she refuses to allow him to draw blood from an unconscious patient.

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