[%c_effect c3;square;c3;type;GreatFind;persistent;true] Another move that ignores aesthetic prejudices. The knight heads to b5 and also supports the d4-d5 advance.
1. d2d4  1... g8f6  2. c1f4  2... e7e6  3. e2e3  3... c7c5  4. g1f3  4... f8e7  5. h2h4 A surprising advance and a theoretical novelty, according to my database. It's not shocking that the calmer pawn advance to h3 is the most popular move. I'm not sure if this move was part of his home preparation or the result of over-the-board inspiration, but Gukesh's courage and creativity must be praised. Compared to 5.h3, the move played also opens up space so that the bishop is not attacked with Nf6-h5. However, White already indicated that his plans involve castling queenside and advancing pawns on the kingside. 5... b7b6 [%c_effect b6;square;b6;type;Inaccuracy;persistent;true] Choosing a move is hard when there are so many options. Gukesh's strong reply shows the flaws with Black's move.