https://mdchess.com/index.php?option=com_content&view=article&id=29:set-chess-clock-increment&catid=10:non-scholastic is the original source. It is copied here, without their permission but I hope they won’t mind.
https://mdchess.com/index.php?option=com_content&view=article&id=29:set-chess-clock-increment&catid=10:non-scholastic is the original source. It is copied here, without their permission but I hope they won’t mind.