fredthebear: Carlsen likely was aiming for a transposition to a D35 Queen's Gambit Declined, Harrwitz Attack that he has played many times before. In this case, MC tried 3.Bf4, bishop before knights, which is much less popular. 6.e3? is a very natural move for the structure, but SF confirms it's a mistake here. 6.f3 was needed in this instance, leaving White better.Oh, and take note that "double deuce" Shevchenko <brought the queen out early> to beat the world champion in their apparent first meeting. The champ was preparing 20.Nf3 to trap the Black queen on the back rank w/the opposite rook, but the youngster sacrifices the h-pawn to deflect the White queen and wiggles free on the pawn row, ready to collect that same knight in the final position shown.
Yes, one should bring the queen out early if she can gain piece material or checkmate. She can often fork a loose minor piece along the frontier line or pile up on the f2-f7 square, etc. I cannot recommend that the queen chase after a lone pawn early on while her minor pieces sit on the back rank, but such is often playable. How much time will she lose if she comes out early? Will she get in a situation, only to get caught before getting back out? In Carlsen-Shevchenko, Qxb2 does lead to bigger things by creating dynamic imbalances. It makes less sense for most players to try a "safe, solid" defense against Carlsen; he is KING of that positional grind domain.
* For comparison, here's a poisoned pawn variation of the D02 London System: 1.d4 d5 2.Nf3 Nf6 3.Bf4 c5 4.e3 Qb6 Nc3.
* Here's a blog on the D02 line that includes the possibility of a quick draw: https://www.chess.com/blog/X_PLAYER...
* A low-volume short video shows different trapping moves: https://www.youtube.com/watch?v=-m3...
* Here's Wikipedia for more poison in other openings: https://en.wikipedia.org/wiki/Poiso...
Who amongst us has beaten a world champion in our first attempt? It's a miniature, no less. "Double deuce" Shevchenko has made a name for himself.