Stockfish specifically dropped support for opening books since at least 2014, possibly earlier. The code base literally does not have the capability to use one any more. Regardless, in every game that I saw, Stockfish played perfectly sound openings that nobody would criticize it for.
Tablebases are a different story, but in every one of the games they released, where Stockfish lost, it was far behind by its own estimation well before tablebases would have had meaningful utility.
Neither opening books nor tablebases would have helped because Stockfish was handily losing the middlegames, not openings nor endgames.
Tablebases are a different story, but in every one of the games they released, where Stockfish lost, it was far behind by its own estimation well before tablebases would have had meaningful utility.
Neither opening books nor tablebases would have helped because Stockfish was handily losing the middlegames, not openings nor endgames.