Main lineA00
1. a3
No pawn stands on d4, e4, d5 or e5 - this line is played with the centre squares empty.
A00
Anderssen's Opening
2 named lines in this family, ECO A00. Every one of them opens 1. a3, so that move's note is 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. a3
- 1. a3 A useful waiting move that keeps the structure flexible on the a-file. Theory calls this the Anderssen's Opening.
Polish GambitA00
1. a3 a5 2. b4
- 1... a5 A useful waiting move that grabs space on the a-file.
- 2. b4 Challenges the pawn on a5 - it can push to a4 or take on b4. Theory calls this the Polish Gambit.
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.