Library/Openings/French Defense/Tarrasch Variation/Guimard Defense/Thunderbunny Variation ECO C03
Opening· 10 plies

French Defense: Tarrasch Variation, Guimard Defense, Thunderbunny Variation

An entry in the Encyclopedia of Chess Openings (ECO C03), reached after 10 half-moves: 1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. c3 dxe4 5. Nxe4 e5.

French Defense: Tarrasch Variation, Guimard Defense, Thunderbunny Variation ECO C03
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Black rook
Black bishop
Black queen
Black king
Black bishop
Black knight
Black rook
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black pawn
Black knight
Black pawn
White pawn
White knight
White pawn
White pawn
White pawn
White pawn
White pawn
White pawn
White rook
White bishop
White queen
White king
White bishop
White knight
White rook
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End of this line

No further variations branch from this position in our database. To explore neighbouring ideas:

About this opening

French Defense: Tarrasch Variation, Guimard Defense, Thunderbunny Variation is an opening in the Encyclopedia of Chess Openings, classified under code C03. ECO group C (C00–C99) covers open games (1.e4 e5) and the French Defence, including the Ruy Lopez, Italian, Scotch and King's Gambit. This particular variation is reached after 10 half-moves from the starting position, with the move sequence 1. e4 e6 2. d4 d5 3. Nd2 Nc6 4. c3 dxe4 5. Nxe4 e5.

It belongs to the French Defense family. Within that family this is a level-3 branch (the Tarrasch Variation → Guimard Defense → Thunderbunny Variation line). The immediate parent line is French Defense: Tarrasch Variation, Guimard Defense, transitioned via 5…e5.

The opening sequence in prose form: 1.e4 e6, 2.d4 d5, 3.Nd2 Nc6, 4.c3 dxe4, 5.Nxe4 e5. 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.