"Some years ago I was playing in the Hastings tournament with Mikhail Tal. One evening, he picked up an English newspaper, casually glanced at the chess column and started laughing. What had attracted his attention was the position given for readers to solve: it was from his own game against Platonov played at Dubna in 1973. The amusement, however, was caused by the set of par solving times appended in order to rate one’s achievement in finding the answer. These began at 20 seconds, indicating grandmaster strength, then proceeded via master, county player and club player to stop at "average" – five minutes. "That’s very funny", said Tal. "I spent 15 minutes looking at the position before I saw it, and my opponent didn’t see it at all.""