Wow, people love that trap. I just went to play on live.chess.com... my opponent tried almost exactly the same thing. This time the game was with 10 minute time controls.
Nearly the same thing happened.
Queen and Rook Fork in Four Knights
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Jul 9, 2008
0
#3
What move bxf7 and nxf7 be?
Edit: nevermind. So what should I have done to prevent him from grabbing a pawn?
After 9. 0-0, I think it would have been difficult for you to maintain an advantage.
Jul 9, 2008
0
#5
ku8, I put your nxf7 line into Chessmaster. Here's what happened. I love the position after move 27. White appears to be screwed.
Jul 9, 2008
0
#6
broze wrote: After 9. 0-0, I think it would have been difficult for you to maintain an advantage.
All right, thanks.
"5.Ng5 is a mistake, because you don't get anything with that move, i usually play 5...0-0 after that. 5...d5 is an interesting move, but i don't play it."
What about in the second game? (After 4. Ng5)
Jul 9, 2008
0
#7
In the second game, the main-line of particular variation two knights playing is
6c3 b5 7.Bf1 leading to a famous Berliner game. 6.d6 is not supposed to be very good. This is all known theory just not by me 
. 5...Na5 is the more common, but not necessarily better line. 5....b5 move order of Berliner game.
I'm trying to determine why it is a mistake to do what my opponent did. This game was played with 1 minute/1 second time controls.
Instead of forking my queen and rook, couldn't he have just checked me with his bishop and grabbed a pawn?