2.f4 exf4 3.Nf3 g5 4.h4 g4

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  • "[5.Ng5 is] The Allgaier Gambit. If instead the Kt be played to K 5, we have the 'Kieseritzky'" (Marshall, p. 86).
  • "1st.—Allgaier's Mode, Kt. to Kt. 5 at 5th Move.
    2nd.—Kieseritzky's Mode, Kt. to K. 5 at 5th Move.
    This important opening in its two forms now to be examined, differs from the King's Knight's Ordinary Gambit, the Cunningham, the Salvio Cochrane, and the King's Bishop's Gambit, in this respect, that first player at No. 4 moves P. to K. R. 4 instead of B. to Q. B. 4 or Castles. The first form to which Allgaier gave much attention involves the sacrifice of a piece at White's 6th move ; although not theoretically or strictly sound, it yields an attack of a very brilliant kind, although of not so sound, lasting, or enduring a character as that afforded by Kt. to K. 5, the move with which Kieseritzky's name is identified. Both, however, are remarkably fine debuts, producing quite early in the game very critical positions, requiring great nicety of calculation and powers of combination : hence the opening has always been in great favour with the finest players. Anderssen, Steinitz, Zukertort, and Blackburne all evince great partiality for it, and during recent years Mr. Macdonnell has conducted the opening with remarkable skill and success" (Bird, pp. 80-81).

Computer Analysis

  1. [36] -0.29: 5.Ne5 Qe7 6.d4 d6 7.Nxg4 Qxe4+ 8.Qe2 Qe7 9.Qxe7+ Bxe7 10.Nf2 Nc6 11.c3 Nf6 12.Be2 Be6 13.Bxf4 Rg8 14.Bf3 Bd5 15.Nd2 Bxf3 16.gxf3 Nd5 17.Nd3 Rg2 18.0-0-0 Kd7 19.Ne4 Rag8 20.Rde1 b5 21.Ng5 Rg7 22.Bd2 b4 23.c4 Nb6 24.Nxb4 Nxd4 25.Nd5;
  2. [36] -1.20: 5.Ng1 d5 6.d4 Bh6 7.Ne2 f3 8.Ng3 Bxc1 9.Qxc1 dxe4 10.Nc3 Qxd4 11.Qf4 f2+ 12.Ke2 Be6 13.Qxe4 Qb6 14.Rd1 Nd7 15.Qe3 Qxe3+ 16.Kxe3 0-0-0 17.Bd3 Ne5 18.Kxf2 Nxd3+ 19.Rxd3 Rxd3 20.cxd3 Nf6 21.Nge2 Rd8 22.Nf4 Bf5 23.Re1 Bxd3 24.Re7 Bg6 25.Nxg6 fxg6;
  3. [36] -1.38: 5.Ng5 h6 6.Nxf7 Kxf7 7.Nc3 Nf6 8.d4 d5 9.Bxf4 Kg7 10.Nxd5 Bd6 11.Bxd6 Qxd6 12.Nxf6 Qg3+ 13.Ke2 Kxf6 14.Qe1 Qxe1+ 15.Rxe1 Kg7 16.Ke3 Be6 17.Bd3 Nd7 18.Rhf1 Rhe8 19.b3 Rad8 20.c3 Nf6 21.e5 Nd5+ 22.Kd2 Rf8 23.Be4 c6 24.g3 Rxf1 25.Rxf1 b5 26.c4 Nb4 27.cxb5;
  4. [36] -1.48: 5.Nd4 d5 6.d3 Bg7 7.Nb3 dxe4 8.dxe4 Qxd1+ 9.Kxd1 Nf6 10.Nc3 Nh5 11.Be2 0-0 12.Nd5 Nc6 13.Rf1 f5 14.Bxf4 Nxf4 15.Nxf4 fxe4 16.c3 Ne7 17.Nh5 Rxf1+ 18.Bxf1 Be6 19.Ke1 Nf5 20.Be2 Bd5 21.Rd1 Ne3 22.Rxd5 Nxd5 23.Bxg4 Kf7 24.Bf5 Re8 25.Bxh7 Re5 26.Ng3 Bf6 27.Nf5 Nf4 28.g4 Nd3+ 29.Kf1 Nxb2;
  5. [36] -2.15: 5.d4 gxf3 6.Qxf3 Nc6 7.c3 Qe7 8.Be2 d6 9.Bxf4 h5 10.Nd2 Bg4 11.Qf2 Bxe2 12.Qxe2 0-0-0 13.0-0-0 d5 14.Rde1 Qe6 15.exd5 Qxd5 16.Kb1 Bh6 17.Rhf1 Bxf4 18.Rxf4 Nh6 19.g3 Rhg8 20.Nf1 Ng4 21.Ne3 Nxe3 22.Qxe3 Qd6 23.Qe4 Qg6 24.Qf5+ Qxf5+ 25.Rxf5 Rxg3 26.d5 Nb8 27.Re7 Rh3 28.Rxh5 f6 29.Rg7 Rh2;
  6. [36] -2.24: 5.Nc3 gxf3 6.Qxf3 Nc6 7.Nd5 Nd4 8.Qxf4 Ne6 9.Qf2 c6 10.Ne3 Qf6 11.Be2 Qxf2+ 12.Kxf2 Nf6 13.Bf3 Bc5 14.c3 Bxe3+ 15.Kxe3 d5 16.e5 Ne4 17.g4 h5 18.d3 Ng3 19.Rg1 hxg4 20.Bxg4 Nh5 21.Bxe6 Bxe6 22.Kf3 Kd7 23.Bg5 Kc7 24.Kf2 b6 25.Rae1 Rag8 26.d4;
  7. [36] -2.51: 5.d3 gxf3 6.Qxf3 d6 7.Nc3 Bg7 8.Bxf4 Nf6 9.Qf2 Ng4 10.Qg3 Nc6 11.Be2 h5 12.0-0-0 Bxc3 13.bxc3 Qe7 14.Rhf1 f6 15.d4 Bd7 16.Bc4 0-0-0 17.Bd5 Kb8 18.Qd3 Na5 19.c4 b6 20.Rde1 Rde8 21.Kb2 Be6 22.Bd2 Bxd5 23.cxd5 Qd7 24.a3;


  • 5.Ne5 (King's Gambit Accepted, Kieseritzky Gambit)
  • 5.Ng5 (Allgaier; Cotter Cambit, KGA)
Image:chess zhor 26.png
Image:chess zver 26.png a8 rd b8 nd c8 bd d8 qd e8 kd f8 bd g8 nd h8 rd Image:chess zver 26.png
a7 pd b7 pd c7 pd d7 pd e7 f7 pd g7 h7 pd
a6 b6 c6 d6 e6 f6 g6 h6
a5 b5 c5 d5 e5 f5 g5 h5
a4 b4 c4 d4 e4 pl f4 pd g4 pd h4 pl
a3 b3 c3 d3 e3 f3 nl g3 h3
a2 pl b2 pl c2 pl d2 pl e2 f2 g2 pl h2
a1 rl b1 nl c1 bl d1 ql e1 kl f1 bl g1 h1 rl
Image:chess zhor 26.png
King's Gambit Accepted (KGA)
Image:Chess_zver_27_2.PNG a8 rl b8 c8 bl d8 kl e8 ql f8 bl g8 nl h8 rl Image:Chess_zver_27_2.PNG
a7 b7 pl c7 d7 e7 pl f7 pl g7 pl h7 pl
a6 b6 c6 nl d6 e6 f6 g6 h6
a5 pl b5 pd c5 pd d5 pl e5 f5 g5 h5
a4 b4 c4 d4 e4 f4 g4 h4
a3 b3 c3 d3 e3 f3 g3 h3
a2 pd b2 c2 pd d2 e2 pd f2 pd g2 pd h2 pd
a1 rd b1 nd c1 bd d1 kd e1 qd f1 bd g1 nd h1 rd
King's Gambit Accepted (KGA)

1.e4 e5 2.f4 exf4 3.Nf3 g5 4.h4 g4

Chess Program

Droidfish 1.63 featuring Stockfish 8


"DroidFish is an Android port of the very strong Stockfish chess engine, combined with a feature-rich GUI."


  1. Bird, H. E. The Chess Openings, Considered Critically and Practically (London: Dean, 1877; New York: Lockwood, 1880, 1886) ISBN 9781166986032
  2. Marshall, Frank (1904). Chess Openings. Leeds: WHITEHEAD & MILLER, 38, PARK CROSS STREET.
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