Interference (chess) Interference (chess) In the game of chess, interference occurs when the line between an attacked piece and its defender is interrupted by sacrificially interposing a piece. It is a chess tactic which seldom arises, and is therefore often overlooked. Opportunities for interference are rare because the defended object must be more valuable than the sacrificed piece, and the interposition must itself represent a threat. In the position at left, White to play will apparently be obliged to retreat the knight from f5, because the squares to which it could advance are all guarded. However, the interference move 1.Nd6+ interrupts the
Chess piece of Modern Art in New York City. Chess pieces used for play are usually figurines that are taller than they are wide. For example, a set of pieces designed for a chessboard with squares typically have a king around tall. Chess sets are available in a variety of designs, with the most well-known Staunton design, named after Howard Staunton, a 19th-century English chess player, and designed by Nathaniel Cook. The first Staunton style sets were made in 1849 by Jaques of London (also known as "John Jaques of London" and "Jaques and Son of London") . Wooden White chess pieces