public static void Main()
{
var cb = ChessBoardInstances.Get(0);
// read all fens, including score
var fens = Tuner.LoadFens("d:\\backup\\chess\\epds\\violent.epd", false, true);
Console.WriteLine("Fens found : " + fens.Count);
double sameScore = 0;
double totalAttacks = 0;
var start = DateTimeOffset.UtcNow.ToUnixTimeMilliseconds();
foreach (var entry in fens)
{
ChessBoardUtil.SetFen(entry.Key, cb);
_threadData.StartPly();
MoveGenerator.GenerateAttacks(_threadData, cb);
while (_threadData.HasNext())
{
var move = _threadData.Next();
if (!cb.IsLegal(move))
{
continue;
}
totalAttacks++;
var seeScore = SeeUtil.GetSeeCaptureScore(cb, move);
var materialScore = EvalUtil.CalculateMaterialScore(cb);
var qScore = ChessConstants.ColorFactor[cb.ColorToMoveInverse] * materialScore -
CalculateQScore(cb, move, true);
if (seeScore == qScore)
{
sameScore++;
}
// else {
// seeScore = SEEUtil.getSeeCaptureScore(cb, move);
// qScore = ChessConstants.COLOR_FACTOR[cb.colorToMoveInverse] * materialScore - calculateQScore(cb,
// move, true);
// }
}
_threadData.EndPly();
}
Console.WriteLine($"{sameScore:f0} {totalAttacks:f0} = {sameScore / totalAttacks:f4}");
Console.WriteLine("msec: " + (DateTimeOffset.UtcNow.ToUnixTimeMilliseconds() - start));
}
private static int CalculateQScore(ChessBoard cb, int move, bool isFirstMove)
{
var bestScore = Util.ShortMin;
cb.DoMove(move);
_threadData.StartPly();
MoveGenerator.GenerateAttacks(_threadData, cb);
var movePerformed = false;
while (_threadData.HasNext())
{
// only attacks on the same square
var currentMove = _threadData.Next();
if (!cb.IsLegal(currentMove))
{
continue;
}
if (MoveUtil.GetToIndex(currentMove) != MoveUtil.GetToIndex(move))
{
continue;
}
var score = -CalculateQScore(cb, currentMove, false);
score = Math.Max(score,
ChessConstants.ColorFactor[cb.ColorToMove] * EvalUtil.CalculateMaterialScore(cb));
movePerformed = true;
if (score > bestScore)
{
bestScore = score;
}
}
_threadData.EndPly();
if (!movePerformed)
{
bestScore = ChessConstants.ColorFactor[cb.ColorToMove] * EvalUtil.CalculateMaterialScore(cb);
}
cb.UndoMove(move);
return(bestScore);
}