Punish This Innocent Looking Blunder On Move 6 (Smith-Morra Gambit)

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BobD123
Still Working On Post 
 
The Position Below The Sicilian: Smith-Morra Gambit
The Same Can be Reached From transposing the (Old Benoni) 1. d4 c5 with 2. e4…
Levi Rozman had a Bullet Game that entered this position that way 
 
 
Up to Move 6. Bc4 all moves and their sequence are the most commonly played. Eval is {-.45} with White having some compensation for the central pawn with a lead in development and a clear Back Rank to Castle Kingside
 
6…Bg4?? Although this is fairly natural looking, pinning the Knight on f3 to the Queen, IT IS A BLUNDER.
6…e6 is the usual response with a6 a distant second. Bd7 & h6 are also recommended by the engine.

7. Bxf7!! (Brilliant according to Stockfish)

7…Kxf7 (If Black tries to avoid the Bishop trade with Kd7 they are much worse. White can follow up 8. Be3 {+6.07}, Bxg8 {+5.83}, O-O {+5.05}, h3 {+4.48} or Bd5 {+4.18}

9. Qxg4… (White has equalized material from the gambit and accelerated their position while Black's has deteriorated: Their bishop is blocked in, the king is back to original position locked in by their own pieces, weakened adjacent squares, the escape squares are under attack and they can no longer castle. The culmination swayed the Eval nearly 4 points from {-.45} before the blunder to {+3.43}

Its worth noting that from the few Master Games where this was played White wins 67% and Draws 16%, most finishing quickly, including the one I played. 

BobD123

Does anyone know if there’s a limit to the notation+comments we can add in a game to post??

Every time I add my commentary and post it… the game is completely disabled. its posted as a game with no moves at all. Ive reposted the Tactic above and it works fine without the extra notation. its extremely frustrating and when i would try to edit it again all of the moves and notation were missing so had to start from scratch again

 

BobD123

Below is the rest of the game starting after 9. Qxg4 with mate on move 23 if anyones interested. Hopefully it can show one of the ways to take advantage of the new position. As I mentioned above, most of the other games in this position were short as well. Note: this was just some practice match vs Cpu 1700; nothing special. 

 

 
9…Nf6 
10. Qe6 (a more aggressive square) Ne5 (guarding d7 & f7)
11. f4 (kick the knight & threatens e5 & f5) Nd3+ (rerouting & prevents castling)
12. Ke2 Nc5 (attacks queen & protects d7)
13. Qf7+! (kicks king to d7, disconnecting Queen’s guard of d6 pawn & pinning pawn on e7) Kd7
14. Rd1 (Building pressure on the overloaded e7 pawn, now the only defender of d6) h6
15. e5 (ignoring threat on knight, doubling down on the pin and disconnected queen) hxg5
16. Rxd6+ (Launching the assault) Kc7
17. Nb5+ (Zwischenzug, forcing the King backwards and disconnecting Rook from queen) Kc8
18. Rxd8+ (Taking now that only the King can retake) Kxd8
19. exf6 gxf6
20. Be3  Nd7 
21. Rd1 (Forced mate in 6) a6 (Now the Bishop can join in for +M2, playing Rc8 instead delays for a few moves. After white plays Rd7, the Knight can deliver check on c7 forcing their rook to capture. White recaptures with rook and delivers mate Rc8 supported by the Queen