What well known gambits are unsound?


After 9. Qb3 White has a lead in development and several threats and hard to counter all of this. Why someone would want to play this position as Black is a little beyond me as clearly Black is worse to start with after
9. Qb3.

Ponz could you explain why after 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3 Nge7 6.Bg2 Ng6 7.O-O Ngxe5 8.Nxe5 Nxe5 9.Qb3 c6 10.e3 d3 11.Bd2 a5 12.Nc3 Bb4 13.a3 Be7 14.Na4 Black is obliged to play 14...Be6 (instead of normal 14...0-0)?
Also you are repeating yourself again, ignoring my post #294 in which I pointed out that Black has at least no worse after 1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3 Nge7 6.Bg2 Ng6 7.O-O Ngxe5 8.Nxe5 Nxe5 9.Qb3 Be7 10.e3 O-O 11.Rd1 c5 12.exd4 cxd4 13.Bf4 Bf6 14.Nc3 Bg4

Dime, yes after 14. Nc3 it very much appears White has the advantage--give me a follow up move for Black.

Your top line was the one I was commenting on. The bottom game that ends in Nc3...I guess Bg4 hitting the rook. I see a fine position for white but if there is any advantage it must be small. What do you mean by an advantage? I would think an advantage is closer to the win of a pawn with good position. If it is giving it a .2 or .3 that is not so much advantage.

By White advantage. I mean .5 or better which is quite a bit more than the normal opening advantage for White. It is too bad that the lines are very complicated after 12. Nc3 maybe I will find a less complicated line.

Just to satiate curiousity here. What engine are you using, and how deep of an analysis are you going? .5 seems reasonable enough to call it a slight advantage. Converting that advantage though is probably still a tough thing.

I am using an old version of Fritz. We are analyzing a line in the Albin Counter Gambit. I will have to admit that right now I am overwhelmed with so many things to respond to. If I do not respond to a move it is not intentional--it is just my more than 7 decades old mind and lack of stamina.
Here is a response to one line:

He already stated he used an engine and gave a .5 as a slight advantage. I was just wondering what he was using because they vary widely in their strengths and evaluations of positions.

Just to satiate curiousity here. What engine are you using, and how deep of an analysis are you going? .5 seems reasonable enough to call it a slight advantage. Converting that advantage though is probably still a tough thing.
the ponz engine. the rest of us usually use engine assisted help, but i think ponz only uses his brain and nothing else.
If Ponz did not use any engine he would not write texts like " white adv says computer".