The Gibbins-Weidenhagen Gambit, Stummer Gambit is a variation of the Indian Defense, catalogued as ECO A45. The line runs 1. d4 Nf6 2. g4 Nxg4 3. e4 d6 4. Be2 Nf6 5. Nc3, reaching the position shown below after 9 half-moves.
White holds the centre with pawns on d4 and e4. Development is level at two minor pieces each, and Black is up a pawn of material. It is Black to move after five moves. White’s h-file pawn is isolated.
On the Indian Defense generally: A family of defenses to 1.d4 where Black delays d5 in favor of piece development.
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The Gibbins-Weidenhagen Gambit, Stummer Gambit goes 1. d4 Nf6 2. g4 Nxg4 3. e4 d6 4. Be2 Nf6 5. Nc3. It is a variation of the Indian Defense and is catalogued as ECO A45.
The Gibbins-Weidenhagen Gambit, Stummer Gambit is ECO A45. ECO codes group openings by their move order, so nearby codes cover closely related lines of the Indian Defense.
Stockfish evaluates the position after 1. d4 Nf6 2. g4 Nxg4 3. e4 d6 4. Be2 Nf6 5. Nc3 at -0.58 at depth 18, which is a slight pull for Black, within normal opening margins. Engine evaluation is only a starting point — at club level the practical value of a line is mostly about whether you know its plans better than your opponent does.
White holds the centre with pawns on d4 and e4. Development is level at two minor pieces each, and Black is up a pawn of material. It is Black to move. White’s h-file pawn is isolated.