Zwischenzug

The Zwischenzug is a motif in chess. In a supposedly forced sequence of moves a player expects a certain kind reply move. The opponent makes a stronger but instead train, which thus becomes the intermediate move. Is this intermediate move a chess commandment intermediate check is called. If a player is surprised by this often has a psychological effect chess.

Examples: In a sequence of capture moves is not repulsed, but set up a counter-threat that is at least as strong that the opponent's material advantage can not say. A threat is not covered, but answered with a counter-threat.

The word has been adopted as Zwischenzug Germanism in other languages ​​, such as English and Russian.

Examples

Bogolyubov moved here first ... Ta8 -f8 and expected an easy victory, since collapses the position soon after each train of the white lady. Steiner, however, did not pull the lady, but the intermediate move 2.a2 -a4! , Whereupon Bogolyubov spent over two hours to 2 ... Db5 - c4 to find and after 3.Tc1xc4 Tf8xf3 by the renewed Zwischenzug 4.Tc4xc6! yet to lose a character. After 4 ... Tf3 -f8 5.Tc6 - c3 Black resigned. Also 2 ... Txf3 3.axb5 would have lost the knight on c6, and the Best Defense 2 ... Qxb2 3.Dxd5 Se6 4.Sxe6 Ne7! 5.Dc4! T8xf2 6.Sf4 Kh8 7.Sxe2 Txe2 had white with the silent train 8.Kh1! won. In this variant could also 5 ... b5 6.axb5 axb5 7.Dxe2! Follow Dxe2 8.Sxf8 Kxf8 9.Txc7 with a won endgame for White.

The white knight threatens to beat on c7. Black played 14 ... c6 and still had the Zwischenzug 15.Sd5 - c7 Qe8 - e5 prepared, which threatens to h2 Matt. White parried the threat of 16.g2 - g3? Ta8 - b8, lost his knight in 23.Zug and was immediately thereafter. Instead, he had his hand to the Zwischenzug 16.Dd1xg4! can win, because matt follows 16 ... f5xg4 17.Tf1xf8.