[%c_effect b5;square;b5;type;GreatFind;persistent;true]
1. d2d4  1... g8f6  2. c2c4  2... e7e6  3. b1c3  3... d7d5  4. c4d5  4... e6d5  5. c1g5  5... f8e7  6. e2e3  6... e8g8  7. f1d3  7... f8e8  8. g1e2 Developing the knight on e2 was Kasparov's favorite plan in these positions. It can't be too bad. 8... c7c6  9. e1g1  9... a7a5 [%c_effect a5;square;a5;type;Interesting;persistent;true] The Orthodox Defense is Black's most traditional choice against the Queen's Pawn, played by almost all the greatest chess players in history. Naturally, its theory has undergone a great deal of evolution during all these years. Computers are also playing their part in this process: many new plans are being tested, far beyond the traditional Nbd7-f8, which was automatic in this type of position. In this modern version, tested by Lagno in this game and tried earlier by GM Dubov, the knight seeks an alternative route via a6. 10. a1c1 It's not clear to me that this is the best square for the rook. If White is going to try the plan with f3-e4, then the rook might be more useful on d1 or e1. 10... b8a6  11. h2h3  11... a6c7  12. g5f4 A new move. 12... e7d6  13. c3a4  13... c7e6  14. f4e5 [%c_effect e5;square;e5;type;Interesting;persistent;true] 14... d6e5 The critical move, capturing the bishop before White can play f2-f4. 15. d4e5  15... f6d7  16. f2f4 