Pretty cool 
Aggressive Chess Opening Discussion #9: King's Gambit Series: King's Gambit Accepted
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Jul 10, 2020
0
#4
Oh thank you @ElegantFinesse! Did I tell you that I was going to make my own opening encyclopedia? I'm going to try and cover all of the chess openings that exist and let people share their ideas or opinions on the opening. You can do it as well if you want. I like to hear people discuss about their ideas on openings.
Jul 10, 2020
0
#5
Wow that sounds like a huge project! 
Very cool I'll try to contribute too.
This will be about the move 5.Nc3 in the "King's Gambit Accepted: Modern, Abbazia defense".
Let's get started.
5.Nc3 is a simple developing move. This move is not meant to protect the pawn by all means. Black will take the pawn 5...Nxd5. White has 3 main options: 6.Nxd5, 6.Bb5+, or 6.Bc4.
White can take the knight since that knight can be a bother and it is on the central square of the board. Not to mention pawn structure is important in the endgame. 6.Nxd5 6...Qxd5. White always play d4 to grab control of e5 and c5. Logical plan since it's the only central pawn on the board. As you see in this position, white has dark square control. So an idea for white can be to control the dark squares or gain a tempo on the queen with c4. Also with d4, white is attacking the pawn on f4. Here is what the position looks like:
Black is better in this position, but not a huge advantage, just a slight advantage. Black can set up a tactical trap with 7...Be7. If white insists on taking the pawn on f4 with 8.Bxf4, then 8...Qe4+ wins the bishop and the game. Instead, white should play 8.c4 gaining a tempo on the queen. If black wants to stay better, they should play 8...Qd6. Qd6 protects the f4 pawn. There could be another meaning behind Qd6. Anyone my rating or higher can tell me:
Black is better in this position.
After 6.Bb5+, white looks to create a weakness with the move 6...c6. Nc6 or Be7 leads to white being better or equal in the position. White can do a tactical idea with 7.Nxd5, looking to grab the pawn on f4. Black should play 7...Qxd5 to prevent white's idea and the bishop will still be hanging. White will play 8.Qe2+, looking for possible ideas with a maneuver. 8...Qe6 is a nice line in this position. This move is basically telling white to trade off queens so that black can keep that extra pawn and have a nice advantage. Black is still better. White can also play 7.Qe2+, which is the best move according to the engine. I don't understand this move. Black's best move it to play 7...Be6. Then white will retreat the bishop to c4. Black has defended their position well and is better. This is the line with 7.Qe2+:
This is the line with 7.Nxd4:
After 6.Bc4, black has 3 ideas in this position. They can play 6...Nxc3, 6...Qe7+, or c6. 6...c6 protects the knight on d5, but it could potentially make an isolated pawn, so it's not a good idea to have an isolated pawn, although they are up a pawn, they should's want to further ruin their pawn structure all together.
6...Qe7+ still looks to want to give white a messed up pawn structure. White's best move is 7.Kf1. That square is a pretty safe square for the white king since not all of the pieces are developed. Also, king f1 looks to castle artificially. Maybe even pin the queen if black is careless. This position is still better for black but white has some chances for counter play if black isn't careful in this position.
The best move according to the engine is 6...Nxc3. Nxc3 is looking to mess with white's pawn structure. After 7.dxc3, black should take the queen, since it would make the king unable to castle. White has some counter play and can control the e file. So this position is slightly better for black, but it will eventually lead to an equal endgame.
I think I covered everything on the move 5.Nc3. Here is the link for proof on how I analysed this. I hope you enjoyed my point of view. Thanks for reading! I'll be looking forward to hearing some ideas you guys can come up with in the position
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