In game theory, a null move or pass is a decision by a player to not to make a move when it is their turn to move. Even though null moves are against the rules of many games, they are often useful to consider when analyzing these games. Examples of this include the analysis of zugzwang (a situation in chess or other games in which a null move, if it were allowed, would be better than any other move), and the null-move heuristic in game tree analysis (a method of pruning game trees involving making a null move and then searching to a lower depth).
Famous quotes containing the words null and/or move:
“A strong person makes the law and custom null before his own will.”
—Ralph Waldo Emerson (1803–1882)
“Glorious bouquets and storms of applause ... are the trimmings which every artist naturally enjoys. But to move an audience in such a role, to hear in the applause that unmistakable note which breaks through good theatre manners and comes from the heart, is to feel that you have won through to life itself. Such pleasure does not vanish with the fall of the curtain, but becomes part of one’s own life.”
—Dame Alice Markova (b. 1910)