All ECO Codes
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A03
Bird's Opening
1.f4 d5
A03
Mujannah Opening
1.f4 d5 2.c4
A03
Bird's Opening
Williams Gambit
1.f4 d5 2.e4
A03
Bird's Opening
Lasker Variation
1.f4 d5 2.Nf3 Nf6 3.e3 c5