/// <summary>
/// Gets the list pf PV nodes for the specified bitboard and color. Nodes count is limited by
/// <see cref="AIConstants.MaxDepth"/> value to avoid infinite repetitions.
/// </summary>
/// <param name="bitboard">The initial bitboard.</param>
/// <param name="color">The initial color.</param>
/// <returns>The list of PV nodes.</returns>
private PVNodesList GetPVNodes(Bitboard bitboard, Color color)
{
var pvNodes = new PVNodesList();
var boardHash = bitboard.GetHashForColor(color);
while (_transpositionTable.Exists(boardHash) && pvNodes.Count < AIConstants.MaxDepth)
{
var pvNode = _transpositionTable.Get(boardHash);
if (pvNode.BestMove == null)
{
break;
}
pvNodes.Add(pvNode.BestMove);
bitboard = bitboard.Move(pvNode.BestMove);
color = ColorOperations.Invert(color);
boardHash = bitboard.GetHashForColor(color);
}
return(pvNodes);
}
/// <summary>
/// Initializes a new instance of the <see cref="AIResult"/> class.
/// </summary>
public AIResult()
{
Stats = new AIStats();
PVNodes = new PVNodesList();
}