1. e2e4  1... e7e5  2. g1f3  2... b8c6  3. f1b5  3... a7a6  4. b5a4  4... g8f6  5. e1g1  5... f8e7  6. d2d3 The two chess players continue the theoretical battle in the Ruy Lopez that occurred in their dramatic match for the world championship. 6... b7b5  7. a4b3  7... d7d6  8. c2c3  8... e8g8  9. a2a4  9... c8d7  10. b3a2 [%c_effect a2;square;a2;type;Interesting;persistent;true] A very rare move, but one once played by GM Peter Svidler, a great expert in the Ruy Lopez with both colors. The idea is to anticipate the typical move 10...Na5 followed by c7-c5, which can occur after 10.Nbd2. 10... h7h6 