You make more risky choices as the day wears on, chess study suggests
By Devika G. Bansal
Dec. 2, 2016 , 4:00 PM
Early birds and night owls have radically different daily habits. But a new study suggests they both share one trait: As the clock ticks, their decisions get dicey. Neuroscientists examined the quality of moves in more than one million games of chess in an online database. They charted the decisions of 99 prolific players by gauging the time they took for each move and its usefulness in leading to a victory—factors that impact games like high-speed tiebreakers in the World Chess Championships, which took place in New York earlier this week. As expected, early risers played more games in the morning, whereas night owls were active at dusk and beyond. But both sets of players took longer for each move and made better game choices early in the day and soon after they woke up. Come evening, their game play quickened by 2.5%, while their moves grew less effective by the same margin on average. The study revealed a pervasive switch in decision strategy from safe play in the morning to riskier—faster and less successful—moves at sundown, the team will report next month in Cognition. The finding shows we may have greater control over our decisions earlier in the day and soon after we wake up, regardless of when we prefer to sleep. As we grow tired, our bodies’ need for sleep could dictate the quality of our choices—no matter how focused we think we might be.
Sign up for my free email chess course for Beginners and Club Players. In this free course, I focus on helping beginner chess players see the entire board. You will learn how to attack your opponent from move 1 and create a new threat with every single move! I’ve created this series of lessons designed to help beginner and club level players understand the game at a deeper level so that you can start beating higher rated players immediately. Start getting free tips from me directly to your inbox!
– GM Susan Polgar