69 named lines in this family, ECO
A80-A99. Every one of them opens
1. d4 f5, 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; sixty
lines to a page. A line's own page carries up to its
first 4 per-move notes in full.
The moves every line here
plays
1. d4 f5
1. d4Stakes a claim in the centre, controlling e5, and frees the bishop and queen.
1... f5Fights for e4 from the flank - contesting the centre without committing a centre pawn. Theory calls this the Dutch Defense.
White's kingside bishop takes the long diagonal. ...d5, ...e6 and ...f5 build the wall: an iron grip on e4, a permanent hole on e5, and a straightforward kingside attack plan.
2. c4Fights for d5 from the flank - contesting the centre without committing a centre pawn.
2... Nf6Develops the knight to f6, eyeing d5 and e4.