I think this is just referred to as the output of the particular engine's analysis function. It is just a numerical value produced by an algorithm that computationally weighs the pro's and con's of a position. As for the highest/lowest possible score, my guess (as a programmer myself) is that it varies from engine to engine. By the time the score is in the double digits, the game is basically decided anyways so a further positional advantage is just a step along the road to an inevitable win.
Highest +xx.xx in Analysis?
I always find it funny if it goes anything over 20.00 , I'm thinking, come on lazy engine, just find a mate already.
Considering you only start with 39 points of material, a +33.15 evaluation is pretty funny, it would be like having a rook and a pawn against the entire opponent army.
Legaly there is probably a way to promote to a bunch of queens each worth 9 points, so I can see it getting really high.
I got an evaluation of over 100.00 when I put this position into Rybka It's not even a legal position so it doesn't really count...
1...Nf6 2.Nd3
+- (99.07) Depth: 7 00:00:05
1...Nf6 2.Nd3
+- (100.75) Depth: 8 00:00:08
1...Nf6 2.Nd3
+- (101.19) Depth: 9 00:00:29
What is the name of the system used in game analysis that creates a +/- score?
Also what is the Highest/Lowest score possible? I ask because for the first time I saw a +33.15.
the highest is this: #1 (mate in one)
Surely a forced mate is possible from there even with best play from white.
By the way my response to this was King to c1 which the computer analysis described as a blunder.
What is the name of the system used in game analysis that creates a +/- score?
Also what is the Highest/Lowest score possible? I ask because for the first time I saw a +33.15.