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What do the computer evaluation numbers mean (like +2.25)?
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Chess engines (computer programs) use a standard notation to indicate who is better off (White or Black) in a given position. It's pretty simple, actually. First, a positive ("+") number means that White's position is better; conversely, a negative ("-") means things look better for Black. The number itself can be related to the material evaluation of the different chess pieces: 1 = a pawn 3 = a Knight or Bishop 5 = a Rook 9 = a Queen However, the evaluation is not just about material currently on the board; computer analysis also looks ahead, factoring in positional aspects and tactical possibilities. So, if the evaluation is +2.25, it means that white is ahead by 2.25 pawns (or "points"). (In other words, White has an advantage which is roughly equivalent to 2.25 pawns worth of material.) Likewise, if the evaluation is -3.00, then Black is ahead - and Black's advantage is about the same as having an extra Bishop or Knight! http://support.chess.com/Knowledgebase/Article/View/120/0/what-do-the-computer-evaluation-numbers-mean-like-225 |
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What do those numbers mean when your analyzing your game?
Thanks Rumpelstiltskin. Sorry for my late reply. I just really needed to know the information that you've just given me. So I wanted to thank you. Even though it was late by 5 days :P
Thanks agian. Cheers.
No problem! I ask the same thing 2 or 3 weeks ago, so I was fresh at the moment I reply to you. Have fun.
= or +/- let's say, 0.05 is about equal. If that pops up...
If so, how did I once find a -100.7? There are only 39 points on the board!
If so, how did I once find a -100.7? There are only 39 points on the board!
As Rumplestiltskin explained in #2, above, the evaluation includes positional elements and tactical possibilities, not just material. I would guess that a -100.7 evaluation indicates imminent checkmate.
Eventually, it did change to "Mate in 59." Thank you, OldPatzerMike, and sorry I missed that.
In 1999, Larry Kaufman did a celebrated study of 80,000,000 positions, published in Chess Life, where he found the pieces to be:
Q = 9.75, R = 5, B = N = 3.25, P = 1. My guess is that modern chess engines use something closer to that instead of the old Fred Reinfeld numbers (9, 5, 3, 1). After all, you don't often see chess engines trade its Bishop and Knight (6.5 pts) for the Pawn and Rook (6.0 pts) in a castled position at f2 or f7.
Imagine the effort that took him! What would the king be worth if it had a point value? Excluding the easy "infinity," as that is obvious. Or is it the best answer, equal with "the game?"
But who has the better position? A player starting with nothing but his king, or the one starting with everything but his king? In that position, the king is worth more than 39 points!
And what does +M10 mean ?
And what does +M10 mean ?
Mate in 10
WHITE mates in 10
-M10 would be BLACK mates in 10
= or +/- let's say, 0.05 is about equal. If that pops up...
The position is equal, more or less.
Okay thanks, this helps so much because I thought that the m's meant million and I was so confuzzled
i think the king is meant to be worth around 5 in the endgame. a single tempo is ~0.3 which is why lucas chess starts its mistakes at 0.3
What about M0? I can't seem to find the mate!
Pretty sure that means there's mate on the board lol
So yeah, what do those numbers mean? The ones that they give you when your going through your moves. They're in parenthesis.