In auction bridge, the scoring system favoured the red suits, as shown in the following point count for each odd trick:
30 points formed a game and an undertrick worth 50 points penalty.
Moreover, the rules for sufficient bid were based on the value of the contract rather than the level, therefore, a player holding long black suit was not possible to overcall freely, as illustrated by the following example:
East could bid nothing but to double, which was a conventional invitation to lead a spade, hoping that the spade suit could run. However, in royal auction bridge, with improved point counts, East could easily compete by bidding two lilies (equivalent to two spades in modern terms).