Professional foul Football League, recommended in 1982 that any offence that denies the attacking player an obvious scoring opportunity should be deemed "serious foul play" by English referees and would therefore receive a red card, in order to deter offenders. The subcommittee produced several suggestions, including making the professional foul a mandatory red card offence, which they submitted to the IFAB for consideration. All the suggestions were defeated. The rule was finally fixed into the Laws of the Game by IFAB in 1990 and referees were instructed by FIFA for the 1990 World Cup to send off players for a professional foul.
First-move advantage in chess games beginning 1.d4 (moving the queen's pawn 2 spaces forwards). The main reason that 1.e4 was less effective than 1.d4 was the Sicilian Defence (1.e4 c5), which gave White only a 52.3% score in 145,996 games. Statistician Jeff Sonas, in examining data from 266,000 games played between 1994 and 2001, concluded that White scored 54.1767% plus 0.001164 times White's Elo rating advantage, treating White's rating advantage as +390 if it is better than +390, or −460 if it is worse than −460. He found that White's advantage is equivalent to 35 rating points, i.e. if White has a rating 35