public Eval AddPV(Eval mAlpha, Eval mValue, Move move, List <Move> line)
{
var bWTM = WTM();
//[Lock]UCI may change this at any time. See GameState.newVariations()
var bHasValue = 0 < State.VariationCount;
var bGrow = State.VariationCount < State.MultiPVLength;
if (bGrow)
{
State.VariationCount++;
}
var bRoomToGrow = State.VariationCount < State.MultiPVLength;
var vn = State.Variation;
var nFinal = State.VariationCount - 1;
var bPlace = bGrow || bHasValue && mValue > vn[nFinal].Value;
if (bPlace)
{
vn[nFinal].Value = mValue;
bHasValue = true;
if (vn[nFinal].Moves is null)
{
vn[nFinal].Moves = new List <Move>();
}
var lineMoves = vn[nFinal].Moves;
lineMoves.Clear();
if (!isDefined(move))
{
Debug.Assert(isDefined(move), "Undefined Move [AddPV]");
move = Move.NullMove;
}
lineMoves.Add(move);
var bPonder = line.Count > 0; //!bChildFinal
if (bPonder)
{
lineMoves.AddRange(line);
}
//
// Insert at correct position:
//
var nPlace = vn.Insert(nFinal);
if (nPlace == 0)
{
var sb = new StringBuilder();
var mEval = reflectValue(bWTM, mValue);
sb.UpdateBestInfo(State.BestMoves, lineMoves, mEval, bPonder, State.Rule)
.FlushLine();
}
#if DebugPlace
if (UCI.IsDebug)
{
var sb = new StringBuilder();
var sGrow = bGrow ? "Placed" : "Replaced";
sb.AppendFormat($"{sGrow} vn[{nPlace}]");
LogInfo(Level.note, sb.ToString());
sb.Clear();
State.MovePosition.writePV(sb, nPlace, bWTM);
}
#endif
}
//
// Avoid raising Alpha until we have a candidate for the weakest Variation:
//
return(bRoomToGrow ? mAlpha : bHasValue?vn[nFinal].Value : mValue);
}
internal static UInt32 captured(Move move)
{
return((UInt32)move >> nCaptiveBit & vPieceMask);
}
internal static UInt32 promoted(Move move)
{
return((UInt32)move >> nPromoteBit & vPieceMask);
}
internal static Int32 to(Move move)
{
return((Int32)move >> nToBit & (Int32)uSquareMask);
}
private static UInt32 moved(Move move)
{
return((UInt32)move >> nPieceBit & vPieceMask);
}
internal static bool isCapture(Move move)
{
return((move & Move.CaptiveMask) != 0);
}
protected static Int32 from(Move move)
{
return((Int32)move >> nFromBit & (Int32)uSquareMask);
}
internal static Boolean isCastles(Move move)
{
return((move & Move.Castles) != 0);
}
internal static Boolean isNullMove(Move move)
{
return((move & Move.NormalMask) == Move.NullMove);
}
internal static Boolean isEmptyMove(Move move)
{
return((move & Move.NormalMask) == Move.EmptyMove);
}
internal static Boolean isDefined(Move move)
{
return((move & Move.NormalMask) != Move.Undefined);
}
internal static Boolean isDefinite(Move move)
{
return(isDefined(move) && !isEmptyMove(move));
}