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 in China by 30% each year. Fortunately for the Chinese Chess Association, in 1993, it received an endowment fund from Singapore businessman S T Lee who donated about US $1.5 million. 10% of this donation was for the establishment of the chess library at China QiYuan. The remaining 90% were deposited in a fixed account from which the Chinese Chess Association drew interest mainly for its administrative operations and to send players for overseas competitions. In 1997, the Chinese Chess Association founded a computer company to fund its other activities on an annual basis. Decision making is done collectively and any final