of the Réti Opening, with 3.Nf3 being a possible next move. 2.c4 is not a true gambit, since if Black tries to hold on to their pawn, they will be punished (2.c4 dxc4 3.e3 b5 [Black should pursue development instead] 4.a4 c6? 5.axb5 cxb5 6.Qf3, where Black must part with a , akin to the Queen's Gambit Accepted trap). From's Gambit: 1...e5 Black's reply is 1...e5, From's Gambit, named for the Danish chess player Martin Severin From (1828–1895). White then has the option to transpose into the King's Gambit with 2.e4. This is an important option which may cause Black to consider playing a different line if they wish to avoid the King's Gambit. It has been observed that one of the possible disadvantages of From's Gambit is that it is very easy for White to avoid. If White accepts the gambit with 2.fxe5, Black must choose between the main line 2...d6 and the rather obscure 2...Nc6. After 2...Nc6, International Master (IM) Timothy Taylor, in his 2005 book on the Bird's, recommends 3.Nc3 Nxe5 4.d4 intending 5.e4, rather than 3.Nf3 g5! when Black stands well. After the normal 2...d6 3.exd6 Bxd6, White must play 4.Nf3, avoiding 4.Nc3 Qh4+ 5.g3 Qxg3+ 6.hxg3 Bxg3 checkmate. Then Black again has two alternatives: 4...g5 to drive away White's knight, and 4...Nf6, threatening 5...Ng4 and 6...Nxh2! Future world champion Emanuel Lasker introduced 4...g5 in the game Bird–Lasker, Newcastle upon Tyne, 1892, so it is known as "Lasker's Variation". Taylor considers 4...g5 dubious; a quiet response that he considers favourable for White is 5.d4 g4 6.Ne5! (6.Ng5 leads to a dubious piece sacrifice) Bxe5 7.dxe5 Qxd1+ 8.Kxd1 Nc6 9.Nc3! Be6 (9...Nxe5?! 10.Bf4 f6 11.Nd5 Kd8 12.Nxf6!) 10.Bf4 0-0-0+ 11.Ke1 Nge7 12.e3 Ng6 13.Bg5 Rdf8 14.Bf6 Rhg8 15.Be2 Ngxe5 16.Rf1 "with the typical edge for White that is characteristic of this variation", according to Taylor. He also considers the sharper 5.g3 g4 6.Nh4 favourable for White, giving as the main line 6...Ne7 7.d4 Ng6 8.Nxg6 hxg6 9.Qd3 Nc6 (9...Rh5 10.Bg2; 9...Na6 10.c3) 10.c3 (10.Nc3? Nxd4! 11.Qxd4?? Bxg3+ wins White's queen) Bf5 (10...Qe7 11.Bg2! Bd7 12.Nd2 0-0-0 13.Ne4! favoured White in Taylor–Becerra Rivero, Minneapolis 2005) 11.e4 Qe7 12.Bg2 0-0-0 13.Be3. According to Taylor, White has a large advantage in all lines, although play remains extremely sharp, e.g. 13...Rde8 14.Nd2; 13...Rxh2 14.Rxh2 Bxg3+ 15.Kd1 Bxh2 16.exf5! Re8 17.fxg6! Qxe3 18.Qxe3 Rxe3 19.gxf7; or 13...Bd7 (threatening 14...Rxh2!) 14.Bf2! Other Black