"Our goal is to produce the largest and most diverse dataset on human problem-solving behavior recorded to date." ...

Last week's challenge came from Evan Kalish, of Bayside, N.Y. There is a set of five five-letter words that vary by just their middle letter. If the middle is any letter from K through O, it makes a ...

A puzzle that can tell players how fast they think on their feet has been developed by a University of Leeds researcher. DecryptIQ is a web-based puzzle developed by Dr. George Gabriel, Leverhulme ...

First look: Mozilla is adding new widgets to Firefox's New Tab page, including an AI-powered crossword puzzle tied to current news. The feature is powered by Particle, an AI news reader that ...

Last week's challenge came from my New York Times colleague Sam Ezersky. Take the name of a popular 21st-century film with animals, in eight letters. Remove the first and last letters, then change one ...

As Google incorporates more artificial intelligence into search, people are spending more time on Google. Some website operators are crying foul. Credit...Timo Lenzen Supported by By Kate Conger ...