Transposition (chess)

As diverter ( engl. transposition ) is called in chess achieving the same position (including castling, en passant train and rights) over different headways. Particularly often - but not exclusively - come transpositions before the opening. A simple example is the following:

The King's Gambit begins with the move order 1.e4 e5 2.f4. Froms gambit, however, starts with 1.f4 e5. If a game with froms gambit is opened, White has the opportunity to play 2.e4 by the King's Gambit " by diverter ".

In professional chess, where opening preparation plays a big role, transpositions are an important means to avoid certain variants and to lure the enemy into unknown territory.

Example: transition into another opening

The game Josef Halbritter - GM Lechtýnský ( Oberliga Bayern 2001) was opened with seemingly Caro-Kann:

1 e2- e4 c7 - c6   2 d2 -d4 d7 -d5   3 f2 -f3 e7 - e6   4 Nb1 - c3 Ng8 - f6   5 e4 e5 Nf6 - d7   6 f3 - f4 c6 - c5 This position is also often played a variant of the classical system of the French Defence:

1 e2- e4 e7 - e6   2 d2 -d4 d7 -d5   3 Nb1 - c3 Ng8 - f6   4 e4 e5 Nf6 - d7   5 f2 - f4 c7 - c5 In the Caro -Kann variant of White's pawn reaches the black pawn on f3 f4 after about c6 by c5. In the French version, the farmers go straight f4 and c5. Thus this position is reached a train earlier.