Chess Opening Theory/1. d4/1...d5/2. c4/2...c5

Austrian Defense rd nd bd qd kd bd nd rd pd pd pd pd pd pd pd pd pl pl pl pl pl pl pl pl rl nl bl ql kl bl nl rl Austrian Defence The Austrian chess players Hans Haberditz (c. 1901–57), Hans Müller (1896–1971), and GM Ernst Grünfeld studied this defense, which was initially introduced by Italian chess player Alessandro Salvio in 1604. Black creates a lot of tension and aims to disrupt White's center and prevent white from seizing the initiative by mirroring White's moves, adding a little complexity to the position. This defence is prone to complete equality, but current theory suggests that white should gain a practical (although still equal when analyzed with engines) advantage with the appropriate moves. White's responses White will probably reply with one of the following options: 3. cxd5 - The classical main line in the Austrian Defence. 3. dxc5 - Exchanging a central pawn for a flank pawn. 3. Nf3 - Inviting a transposition to the Tarrasch Defence. Theory table 1. d4 d5 2. c4 c5 3 4 56EvalNotesAustrian Defencecxd5Qxd5Nf3cxd4Nc3Qa5Nxd4Na6 +=Main Line Austrian Defence, Gusev Countergambit ...Nf6 e4Nxe4 dxc5Qa5+Bd2Nxd2+/− ...... ...... ...Nxc5Nc3e5 +/−......Nf3cxd4Qxd4Qxd5Nc3Qxd4 += Austrian Attack, Salvio Countergambit dxc5d4 Nf3Nc6 e3e5exd4exd4+= Tarrasch Defence, Psuedo-Tarrasch Nf3e6 cxd5exd5 g3Nc6Bg2Nf6+=By TranspositionQueen's Gambit Accepted, Gunsberg Defence...dxc4d5e6e4exd5exd5Bd6 +=By Transposition Symmetrical Defence References 1 d4 d5 and Unusual Replies to the Queen's Gambit, Nunn, John (ed.), et al. (1999). Nunn's Chess Openings. Everyman Chess, 1-8574-4221-0.