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
Alfil (chess) Alfil (chess) An alfil (or elephant) is a xiangqi piece and fairy chess piece that jumps two squares diagonally. In many chess variants, but not in xiangqi, it can leap over intermediate pieces. The alfil jumps two squares diagonally, leaping over any intermediate piece. The alfil is a very old piece, appearing in some very early chess variants, such as Tamerlane chess and shatranj. The elephant in xiangqi moves like an alfil, but has additional restrictions involving where it can move. The piece was originally called an "elephant", and two of its alternate names were "hastīn" and "gāja", two Sanskrit