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The gambit is named after the Welsh sea captain William Davies Evans, the first player known to have played it.The first game with the opening is considered to be Evans–McDonnell, London 1827, although in that game a slightly different move order was tried (1.e4 e5 2.Nf3 Nc6 3.Bc4 Bc5 4.0-0 d6 and only now 5.b4).
Not all opening lines involving the sacrifice of material are named as gambits, for example the main line of the Two Knights Defense (1.e4 e5 2.Nf3 Nc6 3.Bc4 Nf6 4.Ng5 d5 5.exd5 Na5) in which Black sacrifices a pawn for active play is known as the "Knorre Variation", though it may be described as a "gambit".
The Blackmar–Diemer Gambit arose as a development of the earlier Blackmar Gambit, named after Armand Blackmar, a relatively little-known New Orleans player of the late 19th century who popularized its characteristic moves (1.d4 d5 2.e4 dxe4 3.f3) and was the first player to publish analysis of the opening. [2]
Ordered by chess opening: . Albin Countergambit: Lasker Trap; Blackmar–Diemer Gambit: Halosar Trap; Bogo-Indian Defence: Monticelli Trap; Budapest Gambit: Kieninger Trap; Englund Gambit Trap
The main line runs 4.Bg5, first played by Howard Staunton against Bernhard Horwitz in London, 1846. [1]After 4.Bg5, a common trap is 4...d5? 5.Bxf6 exf6 6.Qh5+ g6 7.Qxd5 Qxd5 8.Nxd5 when White has regained his pawn, and since his knight is attacking the pawns on both c7 and f6, will come out a pawn ahead.
In chess, the Smith–Morra Gambit (or simply Morra Gambit) is an opening gambit against the Sicilian Defence distinguished by the moves: . 1. e4 c5 2. d4 cxd4 3. c3. White sacrifices a pawn to develop quickly and create attacking chances.
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The King's Gambit is a chess opening that begins with the moves: . 1. e4 e5 2. f4. White offers a pawn to divert the black e-pawn. If Black accepts the gambit, White may play d4 and Bxf4, regaining the gambit pawn with central domination, or direct their forces against the weak square f7 with moves such as Nf3, Bc4, 0-0, and g3.