Interpeting SCID vs PC Analysis

I am trying to use SCID vs PC to analyze my games. Below is a selected section of the PGN annotation produced by Stockfish. What to do the yellow and green lines tell me? (Note, in case it matters, in the annotations dialog, I have things set to look at whites moves only)

When you see colors in the analysis area, the "traffic light" meaning is: 1) yellow = the position is about even; 2) green = White is better or winning; 3) red = Black is better or winning. Analysis colors are configurable via Options --> Colors -->EngineArrows, and a color "traffic bar" uses yellow to mean roughly equal position, green for White advantage, red for Black advantage. Ciao

@Kromok2 - Thank you for your reply. But, I added the colors.

I should have tried to make my question more clear. I am trying to determine what the different scores mean. For example, for move 4. Bd3, the annotations inserted by SCID vs PC shows the following scores "-0.07/+0.42 -0.10/+0.00 +0.05 +0.01/+0.22 -0.07/+0.30." What do those scores tell me ?

Those numbers are chess engine evaluations expressed in pawn (or centipawns when multiplied by 100) units. "+" means an advantage for White, "-" means an advantage for Black, "0.00" means the position is assessed as completely equal. All values in your example fall between -0.10 and +0.42, which tells you that every engine considers the position after 4. Bd3 to be roughly balanced, with only a very slight edge that varies by engine. Each space-separated group comes from a different chess engine that SCID vs PC ran during analysis. Within each group, the slash ("/") separates the evaluation of the best move and the second best move according to that specific engine. Engines use different evaluations functions, that's why you see a spread from -0.10 to +0.42 instead of identical numbers. In practical terms, +/-0.30 or less is considered "equal" in modern engine analysis. The move 4. Bd3 keeps the game balanced, and different engines disagree only on which side holds a microscopic, irrelevant edge. If you wanna see which engine produced which score, open the "Engine Analysis" window, and you'll see each engine's name paired with with its evaluation and principal variation. Ciao

@Kromok2 - Thanks! I "thought" I was using just one engine - Stockfish. However, I am not sure now what my setting were as I cannot recreate those results. Nevertheless, I ran analysis and annotations again using Stockfish, and I set annotations for both black and white. The results are below. Is the following a correct interpretation of the score for move 4. Bd3:

• After 3...e6, white was ahead by 0.32 (just shy of 1/3 a pawn);
• Engine did not identify any move better than 3....e6
• After 4. Bd3, white was barely ahead at +0.08
• If white made the alternative best move, white would have maintained its +0.32 lead

In SCID vs PC, when you annotate with one engine and select "annotate both sides", the format tipically shows: [eval_before_move] / [eval_after_move]. So if you see +0.32 / +0.08, that means: 1) before playing 4. Bd3, the position was evaluated at +0.32 (White slightly better); 2) after playing 4. Bd3, the position is evaluated at +0.08 (still White is better, but much less so). Then yes, your interpretation is mostly correct (with just one subtle point to clarify). The correct interpretation is: 1) White had a small edge (+0.32) before 4. Bd3; 2) after 4. Bd3, the edge shrinks to +0.08 (still favorable to White, but much less so); 3) no better move was found for Blach after 3... e6 (that confirms it was optimal); 4) an alternative White move would have preserved the +0.32 advantage (so 4. Bd3 is a mild inaccuracy, not a blunder, but a move that lets Black equalize somewhat). Great job catching the nuance, you're thinking like a strong player !

Thank you

You're welcome, anytime. I'm here whenever you need me