Library/Openings/Bird Opening/Thomas Gambit ECO A03
Opening· 9 plies

Bird Opening: Thomas Gambit

An entry in the Encyclopedia of Chess Openings (ECO A03), reached after 9 half-moves: 1. f4 d5 2. b3 Nf6 3. Bb2 d4 4. Nf3 c5 5. e3.

Bird Opening: Thomas Gambit ECO A03
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Black rook
Black knight
Black bishop
Black queen
Black king
Black bishop
Black rook
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black knight
Black pawn
Black pawn
White pawn
White pawn
White pawn
White knight
White pawn
White bishop
White pawn
White pawn
White pawn
White pawn
White rook
White knight
White queen
White king
White bishop
White rook
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End of this line

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About this opening

Bird Opening: Thomas Gambit is an opening in the Encyclopedia of Chess Openings, classified under code A03. ECO group A (A00–A99) covers flank and irregular openings, including the English, Bird, Réti and Dutch defences. This particular variation is reached after 9 half-moves from the starting position, with the move sequence 1. f4 d5 2. b3 Nf6 3. Bb2 d4 4. Nf3 c5 5. e3.

It belongs to the Bird Opening family. Within that family this is a sub-variation (the Thomas Gambit line).

The opening sequence in prose form: 1.f4 d5, 2.b3 Nf6, 3.Bb2 d4, 4.Nf3 c5, 5.e3. From this position the encyclopaedia records no further canonical continuations — practical play branches into unnamed transpositions or returns to the parent line for alternative ideas.