“We analyzed a half-century worth of research on intelligence and chess skill and found that cognitive ability contributes meaningfully to individual differences in chess skill.” 
 
 The findings, reported online in the journal Intelligence, come out of Zach Hambrick’s Expertise Lab at MSU, which examines the origins of skill in domains such as chess, music and sports. The study found that intelligence was linked to chess skill for the overall sample, but particularly among young chess players and those at lower levels of skill. “But this study shows that, for chess at least, intelligence is another piece of the puzzle.” 
 
 For the in-depth study, known as a meta-analysis, the researchers considered nearly 2,300 scholarly articles on chess skill, looking specifically for studies that included a measure of cognitive ability (such as IQ score) and objective chess skill (such as the Elo rating, which ranks players based on game performance).
– If you were hoping to become a chess master by practicing 10,000 hours, think again. Contrary to the theory that expertise at chess is based on intensive training, researchers at the University of Michigan have concluded based on a meta-analysis of 19 studies that hard work is important but not enough. In this game, if you're not smart, you're probably sunk. "When it comes to expertise, training and practice certainly are a piece of the puzzle," psychology professor Zach Hambrick says. "But this study shows that, for chess at least, intelligence is another piece of the puzzle." The researchers found that intelligence is always linked to chess skill no matter the age of the participant, though the link appears strongest in younger players or those at lower skill levels. It's possible, the team suggests, that this is because upper-echelon players are all pretty bright anyway—at that point, "They're all smart cookies," as the Huffington Post puts it. In an interview with Business Insider earlier this summer, Hambrick conceded that practice is probably important for mastery in any field, but he cautions against "thinking that anybody can accomplish anything with no limits" based solely on hard work. (The youngest ever chess grandmaster in the US has been playing since he was 5.)