1.a4 pushes a rook pawn and hands the center to your opponent. In N = 24,454 Lichess games between players rated 900 to 1700 (September 2026), you score 45.2%. In 847 online games by players rated over 2200, the score is 57.9%. Those players follow 1…e52.e42…f63.c33…b44.d54…xd55.exd5, and that is the line this page explains.
Lichess games from September 2026 (30,577,162 rated 900 to 1700) and 31,791 over-the-board games rated 2300+ from the last 12 months. Data updated: October 14, 2026.
At a glance
Moves
1.a4
ECO
A00
Amateur games
24,454
Of all games rated 900 to 1700
0.1%
White's score
Lichess 900–1700: 45.2% · Online, 2200+: 57.9% · Over the board, 2300+: 50.0%
Evaluation after 1.a4
−0.08
7 named lines in this family; 1 with their own page.
By rating
The opening's share in each Lichess rating band.
0.1%900–1100
0.1%1100–1300
0.1%1300–1500
0.1%1500–1700
What amateurs play and what strong players play
At your level, your opponent answers 1.a4 with 1…e5 in 42 of every 100 games and with 1…d5 in 24. Against 1…e5 the replies are spread out: 2.a5 in 20 of every 100, 2.h4 in 16, 2.b3 in 13 and 2.e4 in 11. Online players rated over 2200 choose 2.e4 in 65 of every 100 games and 2.a5 in 25. The biggest gap comes one move later. After 2…f6 they play 3.c3 in all 218 games, while only 21 in 100 players at your level do; 3.d3 is more common, at 28 in 100. Your score barely moves with rating: between 44 and 46 out of 100 in every band from 900 to 1700.
After 1.a4 · N = 23,101
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
e5
41.8%
43.8%
34.9%
no data
d5
23.7%
45.0%
20.6%
no data
e6
5.9%
47.5%
no data
no data
f6
4.5%
45.6%
25.2%
no data
c5
4.0%
43.4%
2.8%
no data
a5
3.9%
48.2%
2.8%
no data
g6
no data
no data
3.9%
no data
After 1.a4e5 · N = 9,571
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
a5
20.2%
46.8%
25.4%
no data
h4
16.2%
45.2%
no data
no data
b3
13.4%
45.7%
no data
no data
e4
11.2%
42.8%
64.7%
no data
c3
9.2%
46.7%
no data
no data
d4
4.7%
41.0%
no data
no data
a3
no data
no data
7.4%
no data
g3
no data
no data
2.5%
no data
After 1.a4e52.e4 · N = 3,341
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
f6
35.5%
47.8%
100.0%
no data
c6
25.1%
44.7%
no data
no data
c5
11.0%
45.6%
no data
no data
d5
9.7%
46.7%
no data
no data
d6
7.9%
48.5%
no data
no data
f6
3.6%
26.7%
no data
no data
After 1.a4e52.e4f6 · N = 1,015
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
d3
28.0%
54.2%
no data
no data
c3
20.8%
43.6%
100.0%
no data
f3
20.6%
46.2%
no data
no data
d4
4.9%
54.0%
no data
no data
f3
4.8%
57.1%
no data
no data
c4
4.5%
53.3%
no data
no data
After 1.a4e52.e4f63.c3 · N = 134
Move
Lichess 900–1700
White's score
Online, 2200+
Over the board, 2300+
b4
37.3%
51.0%
73.8%
no data
c5
37.3%
33.0%
6.5%
no data
c6
25.4%
45.6%
2.8%
no data
d5
no data
no data
16.8%
no data
What to do here
The strong-player line, 1…e52.e42…f63.c33…b44.d54…xd55.exd5, has one goal: put a pawn in the center, keep it there, and end up with a pawn on d5 that covers c6 and e6, facing the black pawn on e5. The a4 pawn stays on the sidelines. It covers b5 and not much else.
2.e4 takes the central square that 1.a4 left alone. 2…f6 hits it at once, and nothing defends it. 3.c3 covers it with a piece that also develops. 3.d3 defends it too, but it blocks the f1 bishop's diagonal. 3…b4 attacks that knight: if the bishop takes it, e4 loses its defender and the f6 knight can grab the pawn. That is why 4.d5 comes before the rest of your development. The knight steps out of the trade, and from d5 it hits the b4 bishop, which has no defender, the f6 knight and the c7 pawn all at once. 4…xd5 removes it, and 5.exd5 takes back with the pawn.
In the final position material is level. Your e4 pawn has moved to d5, where it takes c6 and e6 away from your opponent's pieces. The b4 bishop is still loose, and c3 is empty: a pawn on c3 would attack it. Your opponent has f8 and g8 clear and can castle right away. Your f1 bishop and g1 knight are still at home, so get them out soon.
The numbers add some nuance. At your level, after 1…e5, 2.e4 scores 43 out of 100, below 2.a5 at 47; strong players score 67 with it. After 2.e4, only a bit more than 1 in 3 opponents reply 2…f6. 1 in 4 choose 2…c6, which guards e5 and leaves your pawn alone, and 11 in 100 play 2…c5. If 3…c5 comes after 3.c3, the bishop aims at f2, which only your king defends. You score 33 out of 100 there, in a small sample of 50 games.
The strong players' line
The most repeated move in games rated 2200+ online and 2300+ over the board, while at least 20 games play it
Move
Strong games
Chosen by
1…e5
866
34.9%
2.e4
283
64.7%
2…f6
220
100.0%
3.c3
218
100.0%
3…b4
214
73.8%
4.d5
158
51.9%
4…xd5
78
92.3%
5.exd5
72
100.0%
The mistakes that cost the most games
h4Mistake
After 1…e5, 2.h4 is the Crab Variation: another rook pawn and no pieces out. Your opponent takes the center with 2…d5, and after 3.c33…c64.d44…exd45.cxd4 they have a knight out and you have none. 16 in 100 players choose it. It is rarely punished: you score 45 out of 100, and 43 with 2.e4.
16 in 100 play it in this position. It gives away 1 pawn of advantage. It scores 45.2%; e4 scores 42.8%.
a3Blunder
Blunder: this is the Meadow Hay Trap. After 1…e5, 2.a3 puts the rook on the f8 bishop's diagonal, which the e7 pawn no longer blocks. After 2…xa33.xa3 you have given a rook for a bishop. 4 in 100 players try it, and opponents do cash in: you score 33 out of 100, against 43 with 2.e4.
4 in 100 play it in this position. It gives away 3.5 pawns of advantage. It scores 33.1%; e4 scores 42.8%.
b3Inaccuracy
After 1…e5, 2.b3 clears b2 for your c1 bishop but leaves the center to your opponent: 2…d53.e33…f64.d44…d65.dxe5, and the d6 bishop attacks your e5 pawn while your opponent keeps the d5 pawn. 13 in 100 players choose it. It is rarely punished: you score 46 out of 100, above the 43 of 2.e4.
13 in 100 play it in this position. It gives away 0.7 pawns of advantage. It scores 45.7%; e4 scores 42.8%.
h4Mistake
After 1…d5, 2.h4 moves another wing pawn, and your opponent builds a three-pawn center: 2…e53.c33…c54.d34…c65.e4, with pawns on c5, d5 and e5 and none of your pieces developed. 15 in 100 players choose it. At your level it is hardly punished: you score 46 out of 100, against 44 with 2.d4.
15 in 100 play it in this position. It gives away 1.1 pawns of advantage. It scores 45.7%; d4 scores 43.8%.
b4Mistake
After 1…e5, 2.b4 puts a pawn where the f8 bishop attacks it, and nothing defends it. 2…xb4 wins it. 3.c3 kicks the bishop, but after 3…a54.f34…c65.d4 you are still a pawn down. 4 in 100 players try it, and it costs you: you score 31 out of 100, against 43 with 2.e4.
4 in 100 play it in this position. It gives away 1.5 pawns of advantage. It scores 31.3%; e4 scores 42.8%.
f3Mistake
After 2…f6, 3.f3 seems to guard e4, but 3…xe4 takes it: recapture with the f3 pawn and the black queen checks from h4, then wins e4. After 4.e24…f65.d45…exd46.xd4 you are a pawn down. 21 in 100 choose it. It is rarely punished: you score 46 out of 100, and 44 with 3.c3.
21 in 100 play it in this position. It gives away 2.5 pawns of advantage. It scores 46.2%; c3 scores 43.6%.
How players castle
Lichess 900–1700 · the 6 most frequent combinations
White
Black
Games
Not castled
O-O
7,764
Not castled
Not castled
7,147
O-O
O-O
4,724
Not castled
O-O-O
1,733
O-O
Not castled
1,305
O-O
O-O-O
684
Over the board, 2300+ · the 2 most frequent combinations