Main lineE10
1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5
In the centre, White holds d5.
E10
Blumenfeld Countergambit
3 named lines in this family, ECO E10. Every one of them opens 1. d4 Nf6 2. c4 e6, 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 Nf6 2. c4 e6
- 1. d4 Stakes a claim in the centre, controlling e5, and frees the bishop and queen.
- 1... Nf6 Develops the knight to f6, eyeing d5 and e4.
- 2. c4 Fights for d5 from the flank - contesting the centre without committing a centre pawn.
- 2... e6 Supports the centre, adding control of d5.
Duz-Khotimirsky VariationE10
1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5
Spielmann VariationE10
1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 b5 5. Bg5 exd5 6. cxd5 h6
An early pawn trade leaves the c-file as White's avenue and the e-file as Black's - both sides get real winning chances down their own file.
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.