Article snapshot taken from Wikipedia with creative commons attribution-sharealike license.
Give it a read and then ask your questions in the chat.
We can research this topic together.
The Useful space principle in the game of contract bridge was first articulated in a series of six articles in The Bridge World, published from November 1980 through April 1981.
External links
"The Useful Space Principle," The Bridge World, November 1980 – April 1981.
