Kangaroo defense
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The kangaroo defense or Keres defense is a chess opening that begins with the moves 1. d2 – d4 e7 – e6 2. c2 – c4 Bf8 – b4 +. The king's runner is compared here with a hopping kangaroo .
The regular game between Johann Jacob Löwenthal and Henry Thomas Buckle was played in their competition in 1851 and ended after 58 moves with the victory of Schwarz. The move 2.… Bb4 + was occasionally used by the Estonian grandmaster Paul Keres . That is why the advocates of this variant propagate the name Keres Defense. More recently, Tony Miles and especially the Ukrainian grandmaster Vereslav Ingorn used 2.… Bb4 +.
After 2.… Bb4 + it is still possible to move to other openings. White can react to Black's move with 3. Nb1 – c3, 3. Nb1 – d2 or 3. Bc1 – d2. 3. Nb1 – c3 Ng8 – f6 creates the Nimzowitsch-Indian defense . The game passes into a Dutch defense through f7 – f5 .
On 3. Bc1 – d2 Black either takes the piece in between or plays 3.… Qd8 – e7, 3.… c7 – c5 or 3.… a7 – a5. Then Ng1 – f3 and Ng8 – f6 each lead to the Bogolyubov-Indian defense . Ingorn prefers 3.… a7 – a5. After 3.… c7 – c5 4. Bd2xb4 c5xb4 Black places his central pawns on black squares (d6 and e5). If White moves d4 – d5, Black gets a square for one of his knights thanks to the advanced pawn on b4 on c5. This Nc5 presses against e4 from there and controls the queenside, on which Black then gains a space advantage. In this constellation thus achieved, White tried to crack the space advantage with a3 and open the a-file for his rook.
literature
- Dejan Antic, Branimir Maksimovi: The Modern Bogo 1. d4 e6 , New in Chess 2012 ISBN 978-9056914950 .