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Difference between mistake and blunder (self.chess)

ivanmarvin が 投稿

Hi all! I started to use lichess/paste to analyze my games, and it's a really nice tool. But I have a simple question, as title says: what is the difference between mistake and blunder? Is there an 'official' difference or it's only related to that specific engine? Thanks!

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[–]franklymydeerAwful. Just awful. 12ポイント13ポイント  (7子コメント)

Blunder: 300 centipawns

Mistake: 100 centipawns

Inaccuracy: 50 centipawns

Source: https://github.com/ornicar/lila/blob/master/modules/analyse/src/main/Advice.scala#L44-L47

[–]ivanmarvin[S] 3ポイント4ポイント  (6子コメント)

So a mistake it's like I'm giving away material worth a pawn?

[–]amemulo 5ポイント6ポイント  (0子コメント)

There's no 'official' definition that I know of.

But, as their names indicate, a blunder is something really silly, something like giving up a piece for nothing, or losing a checkmate in one, or something like that.

A mistake may be more subtle.

And the you have inaccuracies, which for the love of god sometimes I don't understand why are they marked as such even after I see the recommended move.

[–]hoijarvi 1ポイント2ポイント  (2子コメント)

It's different with human and computer.

If I transfer to an easily won pawn ending but actually missed a mate in 3, the computer considers that as a blunder. I don't consider it even a mistake.

The lichess AI just seems to put a numeric threshold to that. So so if I blunder a pawn, it's a mistake for the computer, but if I make a mistake and the supposed mate in 5 actually fails to a saving resource, that's a mistake to me but a blunder to computer.

[–]pconners 0ポイント1ポイント  (0子コメント)

So so if I blunder a pawn, it's a mistake for the computer

I'm not so sure that this is always necessarily correct. The greater context of the game and position would come into account on whether or not this is a blunder or a mistake. I mean, if your position collapses after that pawn is blundered, then the computer will have no problem telling you that it is a blunder. While, on the other hand, if the blundered pawn wasn't a huge deal anyway, because perhaps the computer sees that your actual play is on the other side of the board anyway and you just aren't seeing it, then the computer may just say inaccuracy. There just isn't enough to go on in this example...

[–]decideonanamelater 0ポイント1ポイント  (0子コメント)

I play similarly to you, If I attack and I force them to give up the exchange, or a free piece, I'll push for an endgame often instead of continuing a possibly fruitful attack. That said, the way we play definitely is technically not the best for sure, so the engine is still right about that.

[–]wabal 1ポイント2ポイント  (0子コメント)

My take on it:A blunder is losing on the spot unless your opponent returns the blunder to you. A mistake is a lot less bad. The opponent usually has to capitalise on mistakes to worsen your position, but you might still have a chance even if he does capitalise on it.

[–]Fizzol 0ポイント1ポイント  (0子コメント)

A mistake, to me, is something like a error in calculation or evaluation, while a blunder is outright missing something obvious.