Also possible is 3.Bc5 4.Nf3 d6, when Black stands well after 5.Bc4 Be6, while 5.d4 cxd4 6.Nxd4 gives White little or no advantage. The best line for Black may be 3.Bc5 4.Nf3 d5 5.exd5 0-0 (better than 5.e4 6.d4, when the normal 6.Bb4 is impossible), and if 6.Nxe5, 6.Re8 7.d4 Bxd4! 8.Qxd4 Nc6, as in the mirror-image line. If Black plays more quietly with 3.Bc5 4.Nf3 Nc6, then 5.Nxe5! Nxe5 6.d4 gives White some advantage. After 4.Ng4, White may also play improved versions of the Ulvestad Variation (6.b4 in the above line) and Fritz Variation (6.Nd5 c6 7.b4), since when White plays b4 his pawn is protected, unlike in the mirror-image position.
Then the typical 4.Ng4 may be met by 5.d4 exd4 6.Na4, when 6.Bb4+, White's usual move in the mirror-image position, is impossible. Third, after 3.Bc5, 4.Nf3 gives a reversed Two Knights Defense. Nb4, an important idea for White in the mirror-image position. Second, after 3.d5, 4.exd5 Nxd5 5.Qh5!? gives White an improved version of the Steinitz Variation of the Scotch Game, since Black can never play. First, the "Reversed Ruy Lopez" with 3.Bb4 is ruled out. It is not a serious try for advantage, but is essentially a useful waiting move that gives White an improved version of Black's position after 1.e4 e5 2.Nf3 Nc6. In addition to these lines, the late American master Ariel Mengarini advocated the whimsical 3.a3, sometimes called Mengarini's Opening. A major alternative for Black is 3.Bc5 (3.Nc6 normally transposes into one of the other lines). The main line today, however, is considered to be 5.Nxc3 6.bxc3 Bd6 7.Nf3 0-0 8.0-0. That game continued 3.d5 4.exd5 Nxd5 5.Bg2 Be6 6.Nf3 Nc6 7.0-0 Be7 8.Re1 Bf6 9.Ne4 0-0 10.d3 Be7 11.a3 Nb6 12.b4, resulting in a position which the Encyclopaedia of Chess Openings assesses as slightly better for White. The move 3.g3, the Mieses Variation, is a quiet continuation in which White fianchettoes his king's bishop, a line played by Vasily Smyslov on a few occasions, most notably in a win over Lev Polugaevsky in the 1961 USSR Championship. or the complexities of 5.Nc6 6.Nb5 g6 7.Qf3 f5 8.Qd5 Qe7 9.Nxc7+ Kd8 10.Nxa8 b6, which the Irish correspondence chess player and theorist Tim Harding extravagantly dubbed "the Frankenstein–Dracula Variation". After 3.Nxe4, White usually continues instead 4.Qh5 (threatening Qxf7#) 4.Nd6 5.Bb3 when Black can either go for the relatively quiet waters of 5.Be7 6.Nf3 Nc6 7.Nxe5 g6 8.Qe2 (or 8.Nxc6 dxc6 9.Qe5 0-0) Nd4 9.Qd3 Nxb3 10.axb3 Nf5 11.0-0 d6, which led to equality in Anand– Ivanchuk, Roquebrune 1992.
1902) Qd7!, with a large advantage for Black in view of his bishop pair and pawn center.
Lasker, simultaneous exhibition, Breslau c. The attractive-looking 4.Bxf7+ is weak after 4.Kxf7 5.Nxe4 d5 ! (inferior is 5.Nc6 6.Qf3+, when Black cannot play 6.Kg8 ? because of 7.Ng5! 1–0 Davids– Diggle, London Banks League 1949, while 6.Ke8 leaves the king awkwardly placed in the center) 6.Qf3+ (6.Qh5+ g6 7.Qxe5 ? Bh6! wins for Black) Kg8 7.Ng5 !? (hoping for 7.Qxg5? 8.Qxd5+ and mate next move, Schottlaender– Ed. Also possible is 3.Nxe4, when 4.Nxe4 d5, forking bishop and knight, is fine for Black. Black has several choices here 3.Bc5 can transpose to the King's Gambit Declined after 4.d3 d6 5.f4 Nc6 6.Nf3 after 3.Nc6 4.d3, 4.Na5, 4.Bc5 or 4.d6 are all playable 3.Bb4 4.f4 Nxe4 5.Qh5 0-0 leads to wild but probably equal play, according to de Firmian in MCO-15. The move 3.Bc4 leads to a position which can also be reached from the Bishop's Opening (1.e4 e5 2.Bc4). Material is not as important as the attack in this position, so White should not be afraid to sacrifice. Other lines for Black include 3.d6 4.Nf3 Nc6 5.Bb5 Bd7 6.d3, when the threat of Bxc6 followed by taking on e5 induces 6.exf4 7.Bxf4, leaving White with a pleasant position and also 3.Nc6? 4.fxe5! Nxe5 5.d4, when both 5.Nc6 and 5.Ng6 are met by 6.e5 with a winning advantage to White. Retreating immediately with 4.Ng8 is better, but after 5.Nf3 with the idea of d4 followed by Bxf4, White has a nice game. The gambit should not be accepted, since 3.exf4 4.e5 Qe7 5.Qe2 forces Black's knight to retreat with 5.Ng8, and after 6.Nf3, Black must be careful not to lose on the spot, for example after 6.d6? 7.Nd5!, when the dual ideas of Nxc7 and exd6 will win the game quickly. However, lines other than 3.d5 give White at least an edge, making this a good choice for aggressive play at lower levels, where opponents are unlikely to know that 3.d5 is best. White obtains open lines and attacking chances, but Black can usually hold the balance with correct play. 5.d3 is also possible, but the normal continuation is 5.Nf3. After 4.fxe5 Nxe4, 5.Qf3 is well met by 5.Nc6, with the point 6.Nxe4 Nd4. It is best met by 3.d5, striking back in the center. At grandmaster level, the gambit move 3.f4 is considered too risky an opening.
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