Last time, I asked you what you would play for White in this position:
I’m going to tell you the engine’s top three choices: 10.Nf5, 10.0-0-0, and 10.h4. 10.Nf5! Is especially strong.
If Black attacks the knight with 10..g6, 11.Nxe7+ Qxe7 12.g3 is a mess for him. White will long castle, kingside attack, and exploit the weakened dark squares.
10…Bxf5 11.exf5, on the other hand, will leave the Nf4 short on squares. White’s space advantage and light square control kneecaps Black’s position.
10…Bf8 looks natural, but then 11.0-0-0 g6?, trying to eject the knight, can be met by 12.g3! Nh5 13.Nh6+, and Black is in big trouble on the kingside.
As you’ve probably figured out by now, White didn’t play this, or another strong move mentioned in the game. Going back to the original position:
Instead, he decided to win a pawn with 10.Bxf4 exf4 11.Qxf4, bringing up the following position.
Why was this an incorrect decision? How would you respond for Black?