capturing left and promoting to a rook, or a queen or rook moving left 3 squares. There are 56 types of &quot;queen&quot; moves (up to 7 squares away in 8 directions), 8 types of knight moves, and 9 types of underpromotions. Kings, queens, rooks, bishops and pawns all make &quot;queen&quot; moves. Unfortunately, the outputs as valuations and probabilities are decimals and cannot be packed into bitboards, instead feeding straight into the search algorithm.</p>

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