1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1c4  3... f8c5  4. d2d3  4... g8f6  5. c1g5 A relatively rare  continuation. White usually waits for his opponent to either castle first  or block his dark-squared bishop with d7-d6. 5... c5e7 Karjakin kills  the pin at once. 6. b1c3  6... d7d6  7. a2a4 Saving the bishop from the positional threat Nc6-a5 with  a swap of the minor pieces.