Score: 1.00 is the value of one pawn (in the opening). Positive values are better for white.
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PV: Principal Variation, the series of moves the engine thinks is the best.
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Thick red line: Marks the best move (in the view of the engine). Multiple chained arrows
- means that the PV starts with multiple successive moves with the same piece, ie., the engine thinks
- that the piece will execute a maneuver.
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Thin red lines: Other good moves, maximum two. Note that even though these are also
- quality checked, these are less thoroughly analyzed by the engine,
- and should be taken with a grain of salt.
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Thick blue line: Marks the best response move. Note that this is only rarely shown,
- since usually, the best response move depends on what the first move is. A typical case is when the current move
- is forced or nearly so.