Qxc3+ looks fine to me, it's an unprotected piece and you check the King, even if white protects with the Bishop he still loses a Rook gaining you two pieces, Knight and Rook respectively. I'm curious though, what was the better move?
How I could do better on this move
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Mar 17, 2022
0
#3
Chess analysis software is based on a mathematical formula that crunches what the best MATHEMATICAL move is.
We humans think differently.
Logically, Qxc3 is the best move that a good chess player would play in a heartbeat. You have to play this move now because white can protect the knight with Bd2 on the next move. You don’t want to play Nxa4 because with b3, white has trapped his own bishop, and you can play b5 to win even more material.
I bet that if Qxc3 is not the computer’s top line, it is a close second.
We humans think differently.
Logically, Qxc3 is the best move that a good chess player would play in a heartbeat. You have to play this move now because white can protect the knight with Bd2 on the next move. You don’t want to play Nxa4 because with b3, white has trapped his own bishop, and you can play b5 to win even more material.
I bet that if Qxc3 is not the computer’s top line, it is a close second.
Mar 17, 2022
0
#4
I asked Stockfish, and it recommended Nxa4 - White will naturally respond by ordering the little thug on b to avenge the murder of a beloved clergyman, after which, Black's best move is, to nobody's great surprise, Qxc3+
Thanks to all! The Game Analysis is apparently sometimes not all correct, that's what I learn 
I disagree with the ...Na4 thingy, since the bishop can get trapped anyway. A ...b5 move would defeat it.
Qxc3+ is likely best.
LitterPicker wrote:
I asked Stockfish, and it recommended Nxa4
What depth are we talking about? My Stockfish says that Qxc3 is the best by far, Nxa4 is not even in the top 3. ( Qxc3 is -15 for White, Nxa4 is only -9).
Okay, I found the game. https://www.chess.com/analysis/game/live/41245749927
Even the chess.com engine thinks that Qxc3 is the best move. I can't imagine what happened when JumperX1 and LitterPicker analyzed it.
Mar 18, 2022
0
#9
magipi wrote:
What depth are we talking about? My Stockfish says that Qxc3 is the best by far, Nxa4 is not even in the top 3. ( Qxc3 is -15 for White, Nxa4 is only -9).
I don't know what happened either - I was using nextchessmove.com with default settings (IIRC, it showed a depth of 20, but I'm not sure about that) - but I just tried it again, and it showed a depth of 24, and recommended Qxc3.
I don't know, it's all geek to me... but I think we can conclude that if an engine says there’s a better move (and I think it likely that there isn't), then that move is Nxa4.
The thing is that Nxa4 is ridiculous. You trade a good knight for a trapped bishop for no reason whatsoever. Probably the engine at very low levels gets confused as it can't even get to the end of the capture-capture sequences.
The chess.com engine has such low resources that it is extremely weak, so anything is possible. I don't know about that nextchessmove website.
Mar 18, 2022
0
#11
magipi wrote:
The chess.com engine has such low resources that it is extremely weak, so anything is possible. I don't know about that nextchessmove website.
One CPU core (unless you fork out $20 p.a to use the 20 CPU core), and >20 engines to choose from, all of which now seem to favour having her majesty abuse the nice white horsey.
So, there is no better move, but at least we now know what move the better move probably isn't.
Hi, I'm relatively new to chess. I played a couple of games and have some questions in the game analysis.
For example, the coach told me that I had a better move in this picture (I played black and it was now my turn, I actually did Qxc3+). I don't know which should be the better move.
Can anybody explain?
Thanks!