Why was this move a blunder?

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Avatar of WoodPusherInc

From my last game; I'm trying to understand why the engine thinks this is such a bad blunder when it seems like all my pieces were defended, and I was adding pressure, a 3rd attacker, to a pinned piece? Appreciate any help understanding this.




Avatar of Nosoris
WoodPusherInc wrote:

From my last game; I'm trying to understand why the engine thinks this is such a bad blunder when it seems like all my pieces were defended, and I was adding pressure, a 3rd attacker, to a pinned piece? Appreciate any help understanding this.

As far i understand the position the move you needed here was a Knight move. By playing Bg4 you allow black to take them (with their queen) without any compensation after all captures. 
So there's nothing like numerical superiority except the 2 vs 1 on your knight.

For the engine these are the kinds of situations where simplifying is more preferable than pressing.

Avatar of chessohrough

Blunder because it misses a chance to capture a pinned piece

Avatar of chessohrough

Plus f3, your bishop moves castle and then they're safe

Avatar of brayden17022
Your knight on d4 is under attack with a supporting piece. So if queen takes, then your queen takes, then their rook takes, you are just down a knight. And also that bishop move doesn't look like it accomplishes too much. Their bishop is defended by 3 pieces. Queen, knight. And king after everything. Im only a 670 rated rapid. So i maybe dont see the board the best i could be wrong. But thats my calculation of it
Avatar of Fet
After 1. Qxd4 Qxd4 2. Rxd4 you are just simply down a piece. The pinned piece is sufficiently protected by the knight on c3 and the king on e1 so you can't take that.