It's probably a dumb question, but on computer analysis there's always two arrows: one white, one colorless, with different moves.
What do they mean exactly? Is it just a different line ?
I couldn't find it anywhere explaining this, sorry if it is available somewhere in the website
Not sure what you mean by "white" and "colorless". If you could clarify when they appear, and what the colors are in more detail, it would be easier to explain.
Usually, in analysis, there are:
1) Pale blue arrows showing the moves that you played
2) The pale green arrows are the engine recommendations (after requesting an analysis)
3) You can toggle on the pale red arrows that show the opponent's expected response/threat
4) If you are in a new line with local computer evaluation, they will also use pale blue
You can also add more saturated red, green, blue, and yellow annotation arrows (in studies/analyses).
To add to nacattack73's descriptions, if you have local analysis turned on with multiple lines, the best move according to the engine is blue; alternate lines are grey. The size of the arrowhead represents the relative strength of the move; thinner arrows are significantly weaker; thick ones are nearly as strong as the main line.
@phoenixshade thanks so much! It's much clearer now
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