This move allows White to immediately go after the bishop with 3. Na4?!, but that allows Black to take advantage of the undefended a4-knight using the Hamppe-Meitner sacrifice 3...Bxf2+!, named after the Immortal Draw (Hamppe-Meitner, Vienna 1872) Kxf2 Qh4+. It is premature to derail the knight on the rim like this when doesn't have any other piece out.
The game continued: Kxf2 Qh4+ Ke3 Qf4+ Kd3 d5 Kc3 Qxe4 Kb3 Na6 a3 Qxa4+!! Kxa4 Nc5+ Kb4 a5+! Kxc5 Ne7 Bb5+ Kd8 Bc6 b6+ Kb5 Nxc6 Kxc6 Bb7+ Kb5 Ba6+ Kc6 Bb7+. 1/2-1/2[1].
The simple 3. Nf3 gives White a slight advantage, though.[2]
| Game | Result | Year |
| Safarli, E. (2649) vs Korobov, A. (2680) | 1/2-1/2 | 2014 |
| Lu Shanglei (2546) vs Sokolov, Ivan (2650) | 1-0 | 2014 |
| Tal, Mihail (2705) vs Knezevic, Milorad (2490) | 1/2-1/2 | 1980 |
| Edouard, R. (2641) vs Van Foreest, Lucas (2531) | 1/2-1/2 | 2019 |
| Hauge, Lars Oskar (2530) vs Kuzubov, Y. (2639) | 0-1 | 2022 |
| Stupak, K. (2570) vs Bortnyk, Olexandr (2585) | 1/2-1/2 | 2017 |
| Benko, Pal C (2515) vs Larsen, Bent (2625) | 1/2-1/2 | 1972 |
| Kuijf, Marinus (2470) vs Sokolov, Ivan (2665) | 0-1 | 1996 |
| Thorhallsson, Throstur (2470) vs Sokolov, Ivan (2650) | 0-1 | 1994 |
| Banikas, Hristos (2572) vs Nikolaidis, Ioannis (2529) | 1/2-1/2 | 2008 |