[%c_arrow b8b7;keyPressed;none;from;b8;opacity;0.8;to;b7;persistent;false,a8a1;keyPressed;none;from;a8;opacity;0.8;to;a1;persistent;false,f8a8;keyPressed;none;from;f8;opacity;0.8;to;a8;persistent;false] Caruana's idea is to play Qb7, exchange rooks, and play Ra8.
1. g1f3  1... g8f6  2. c2c4  2... b7b6  3. b1c3  3... c8b7  4. d2d4  4... e7e6  5. a2a3 [%c_arrow f8b4;keyPressed;none;from;f8;opacity;0.8;to;b4;persistent;false,d4d5;keyPressed;ctrl;from;d4;opacity;0.8;to;d5;persistent;false] This is the so-called Petrosian Variation of the Queen's Indian Defense. The idea behind ​​White's fifth move is to avoid the pin with ...Bb4, now creating the positional threat of playing d4-d5, gaining space in the center. This line was a favorite of the young Garry Kasparov, and I remember studying as a teenager some beautiful wins in his fabulous book \"The Test of Time.\" 5... f6e4 [%c_effect e4;square;e4;type;Interesting;persistent;true] A rarer option than the pawn advance to d5, but also perfectly playable. This was the move played by Ulf Andersson in the game against Kasparov, one of the 13th world champion's most famous victories. 6. c3e4  6... b7e4  7. e2e3  7... f8e7  8. f1d3 The most played move with the idea of ​​exchanging bishops and then occupying the center with the pawn. 8... e4d3  9. d1d3  9... e8g8  10. e1g1  10... d7d6  11. b2b4  11... b8d7  12. f1d1  12... a7a5  13. c1b2  13... a5b4  14. a3b4 