Why is this an inaccuracy? (Beginner)

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Avatar of MissyIdiot

Hello, 

I really try to improve my game, so i'm using the analysis a lot. I'm a beginner. 

Scenario:
Game
I am: White
Accuracy: 91.5
Situation:
My opponent castle's on move 7.  Because my queen was in a perfect position I saw an opportunity and I took it. So I moved my knight to g5. Threatening mate in one, unless he would see pawn g6. But it was a risk I was willing to take. 
I thought this was brilliant because as you can see, he totally missed it and blundered with fd7.
However, the game said my g5 is an inaccuracy. Why? Because of that move I won the game. 
I just don't understand it. 

Avatar of Mystic_Marco
It’s inaccurate cause your opponents best next move would have been h7-h6 kicking the night away.
Then the mating square on h7 would still have been protected by his Knight on f6. So moving his Knight on the next turn was a big blunder that lost your opponent the game.
g6 would also have been a acceptable move cause it stops the mating threat
Hope this helps
Avatar of MissyIdiot

Ohhh right! I get it now! His Knight was also defending h7. You know, I totally missed that! 
Thank you!

Avatar of Mystic_Marco

Glad I could help

Avatar of KieferSmith
MissyIdiot wrote:

Hello,

I really try to improve my game, so i'm using the analysis a lot. I'm a beginner. 
Scenario:GameI am: WhiteAccuracy: 91.5
Situation:
My opponent castle's on move 7. Because my queen was in a perfect position I saw an opportunity and I took it. So I moved my knight to g5. Threatening mate in one, unless he would see pawn g6. But it was a risk I was willing to take. 
I thought this was brilliant because as you can see, he totally missed it and blundered with fd7.
However, the game said my g5 is an inaccuracy. Why? Because of that move I won the game. 
I just don't understand it.

Your move 8. Ng5 didn't even threaten checkmate; the black knight on f6 covered that. Only when the knight moved to d7 did checkmate become a possibility. Castling was the best move, getting your king to safety, activating your rook, and unpinning your knight on c3.

Avatar of Tigerle82

Don't overestimate the stockfish valuations. For your level you played a quite good opening and this inaccuracy will mean nothing with a rating under around 1200 points.

Mystic_Marco is right, when he explained, that the knight was defending h7, but this doesn't explain, why your move was an inaccuracy. Here is a possible reason: You opponent could have played h6. Then you knight would have been attacked and the only place, he can go, is back on f3. Then you would have reached nothing, but you opponent has his move instead of you. Therefore you just had lost tempo. This is the reason (This is not the full truth, as the pawn on h6 will be a possible weakness, but the tempo lost is more important in this position)

But you can safely forget all of this. You will still have more important points, you have to get better than this kind of inaccuracies. In fact, you had a plan and worked for it. And in my opinion this is more important than to miss some tempo at a rating of under 500. Just try to not lose material on your level and you will get better.

There are 3 kinds of inaccuracies, mistake and blunders, stockfish will tell you.
1. ) Those, you see by yourself. Try not to do them next time. That are the real blunder.
2.) Those, you understand, where these move are bad. Try to learn from them. These kind of mistake are those, you can avoid as you are able to know, why these are mistakes.
3.) Shut up, stockfish. Nobody likes smartasses.