/// <summary>
/// Filters the possible moves based and selects one with a weighted random function
/// </summary>
/// <param name="openingMoves"></param>
/// <param name="player"></param>
/// <param name="filter"></param>
/// <returns></returns>
public Move SelectMove(List <OpeningMove> openingMoves, Color player, OpeningBookFilter filter)
{
List <OpeningMove> validMoves = new List <OpeningMove>();
int total = openingMoves.Sum(x => x.Total);
OpeningMove selected = null;
if (player == Color.White)
{
validMoves = openingMoves
.Where(x => x.BlackWinPercent <= filter.MaxBlackWinPercent)
.Where(x => x.WhiteWinPercent >= filter.MinWhiteWinPercent)
.Where(x => x.Total >= filter.MinNumberOfGames)
.ToList();
selected = WeightedRandom(validMoves,
x => x.WhiteWinPercent * filter.ImportantOfWinPercentage
+ x.Total / (double)total * filter.ImportanceOfGameCount);
}
else
{
validMoves = openingMoves
.Where(x => x.WhiteWinPercent <= filter.MaxWhiteWinPercent)
.Where(x => x.BlackWinPercent >= filter.MinBlackWinPercent)
.Where(x => x.Total >= filter.MinNumberOfGames)
.ToList();
selected = WeightedRandom(validMoves,
x => x.BlackWinPercent * filter.ImportantOfWinPercentage
+ x.Total / (double)total * filter.ImportanceOfGameCount);
}
return(selected.Move);
}
public List <OpeningMove> GetAvailableMoves(string currentLine)
{
var len = currentLine.Length;
var a = OpeningLines.BinarySearch(x => x.Substring(0, len).CompareTo(currentLine));
var b = OpeningLines.BinarySearchMax(x => x.Substring(0, len).CompareTo(currentLine));
var lines = new List <string>();
for (int i = a; i <= b; i++)
{
lines.Add(OpeningLines[i]);
}
var moves = new Dictionary <Move, OpeningMove>();
foreach (var line in lines)
{
var result = GameEncoder.DecodeResult(line);
var move = GameEncoder.DecodeMove(line, len);
OpeningMove m = null;
if (moves.ContainsKey(move))
{
m = moves[move];
}
else
{
m = new OpeningMove()
{
Move = move
};
moves[move] = m;
}
m.Total++;
switch (result)
{
case (GameResultsType.BlackWins):
m.BlackWins++;
break;
case (GameResultsType.WhiteWins):
m.WhiteWins++;
break;
case (GameResultsType.Tie):
m.Tie++;
break;
}
}
return(moves.Select(x => x.Value).ToList());
}