/// <summary>
/// Returns whether the given move is a dangerous pawn advance. A dangerous
/// pawn advance is a pawn move that results in the pawn being in a position
/// in which no enemy pawns can threaten or block it.
/// </summary>
/// <param name="move">The move to consider.</param>
/// <param name="passedPawnPreventionBitboard">A bitboard giving the long term attack possibilities of the enemy pawns.</param>
/// <returns>Whether the given move is a dangerous pawn advance.</returns>
private Boolean IsDangerousPawnAdvance(Int32 move, UInt64 passedPawnPreventionBitboard)
{
return(Move.IsPawnAdvance(move) && ((1UL << Move.To(move)) & passedPawnPreventionBitboard) == 0);
}