Définition et Signification de "pie rule"

What is the "pie rule"?

The pie rule is a rule used in some two-player board games, especially in games like Hex or certain variations of games like chess. It is designed to balance the advantage of going first. When the player who goes second sees the first player's move, they have the option to "swap" positions with the first player, effectively allowing the second player to choose whether they want to continue with the first move or take the advantage of the first move themselves. This rule helps prevent the player who goes first from having an unfair advantage and keeps the game more balanced.