Main lineA40
1. d4 e6 2. c4 Bb4+
In the centre, White holds d4.
A40
Kangaroo Defense
2 named lines in this family, ECO A40. Every one of them opens 1. d4 e6 2. c4 Bb4+, so the notes on those moves are written once, just below, instead of once per line. Under each line you get its moves and the sentences it adds that this page has not already printed. A line's own page carries up to its first 4 per-move notes in full.
The moves every line here plays
1. d4 e6 2. c4 Bb4+
- 1. d4 Stakes a claim in the centre, controlling e5, and frees the bishop and queen.
- 1... e6 Supports the centre, adding control of d5. Theory calls this the Horwitz Defense.
- 2. c4 Fights for d5 from the flank - contesting the centre without committing a centre pawn.
- 2... Bb4+ Check from the bishop on b4 - White has to answer with Bd2, Nc3, Nd2 or Qd2. Theory calls this the Kangaroo Defense.
Keres Defense, Transpositional VariationA40
1. d4 e6 2. c4 Bb4+ 3. Nc3
White's knight on c3 is pinned against the king.
Walk these lines on a board
An account opens every move's note in this family, the plan behind each line, and a trainer that plays the line back at you. It is free.