/// <summary>
/// Returns a move to be played on the given position that has the given
/// representation in coordinate notation.
/// </summary>
/// <param name="position">The position the move is to be played on.</param>
/// <param name="name">The representation of the move in coordinate notation.</param>
/// <returns>A move that has the given representation in coordinate notation.</returns>
public static Int32 Create(Position position, String name)
{
foreach (Int32 move in position.LegalMoves())
{
if (name == Stringify.Move(move))
{
return(move);
}
}
return(Invalid);
}
/// <summary>
/// Performs divide on the given position with the given depth. This
/// essentially performs perft on each of the positions arising from the
/// legal moves for the given position. This method writes the results to
/// the terminal.
/// </summary>
/// <param name="position">The position to perform divide on.</param>
/// <param name="depth">The depth to perform divide with.</param>
public static void Divide(Position position, Int32 depth)
{
const Int32 MoveWidth = 8;
String format = "{0,-" + MoveWidth + "}{1}";
Terminal.WriteLine(format, "Move", "Nodes");
Terminal.WriteLine("-----------------------------------------------------------------------");
List <Int32> moves = position.LegalMoves();
Int64 totalNodes = 0;
foreach (Int32 move in moves)
{
position.Make(move);
Int64 nodes = Nodes(position, depth - 1);
position.Unmake(move);
totalNodes += nodes;
Terminal.WriteLine(format, Stringify.Move(move), nodes);
}
Terminal.WriteLine("-----------------------------------------------------------------------");
Terminal.WriteLine("Moves: " + moves.Count);
Terminal.WriteLine("Nodes: " + totalNodes);
}
/// <summary>
/// Executes the parsing.
/// </summary>
public static void Run()
{
Restrictions.Output = OutputType.Universal;
IEngine engine = new Zero();
Position position = new Position(Position.StartingFEN);
String command;
while ((command = Console.ReadLine()) != null)
{
List <String> terms = new List <String>(command.Split(' '));
switch (terms[0])
{
default:
Terminal.WriteLine("Unknown command: {0}", terms[0]);
Terminal.WriteLine("Enter \"help\" for assistance.");
break;
case "uci":
Terminal.WriteLine("id name " + engine.Name);
Terminal.WriteLine("id author Zong Zheng Li");
Terminal.WriteLine("option name Hash type spin default " + Zero.DefaultHashAllocation + " min 1 max 2047");
Terminal.WriteLine("uciok");
break;
case "ucinewgame":
engine.Reset();
break;
case "setoption":
if (terms.Contains("Hash"))
{
engine.HashAllocation = Int32.Parse(terms[terms.IndexOf("value") + 1]);
}
break;
case "position":
String fen = Position.StartingFEN;
if (terms[1] != "startpos")
{
fen = command.Substring(command.IndexOf("fen") + 4);
}
position = new Position(fen);
Int32 movesIndex = terms.IndexOf("moves");
if (movesIndex >= 0)
{
for (Int32 i = movesIndex + 1; i < terms.Count; i++)
{
position.Make(Move.Create(position, terms[i]));
}
}
break;
case "go":
Restrictions.Reset();
for (Int32 i = 1; i < terms.Count; i++)
{
switch (terms[i])
{
default:
case "infinite":
break;
case "depth":
Restrictions.Depth = Int32.Parse(terms[i + 1]);
Restrictions.UseTimeControls = false;
break;
case "movetime":
Restrictions.MoveTime = Int32.Parse(terms[i + 1]);
Restrictions.UseTimeControls = false;
break;
case "wtime":
Restrictions.TimeControl[Colour.White] = Int32.Parse(terms[i + 1]);
Restrictions.UseTimeControls = true;
break;
case "btime":
Restrictions.TimeControl[Colour.Black] = Int32.Parse(terms[i + 1]);
Restrictions.UseTimeControls = true;
break;
case "winc":
Restrictions.TimeIncrement[Colour.White] = Int32.Parse(terms[i + 1]);
Restrictions.UseTimeControls = true;
break;
case "binc":
Restrictions.TimeIncrement[Colour.Black] = Int32.Parse(terms[i + 1]);
Restrictions.UseTimeControls = true;
break;
case "nodes":
Restrictions.Nodes = Int32.Parse(terms[i + 1]);
Restrictions.UseTimeControls = false;
break;
case "ponder":
// TODO: implement command.
break;
case "mate":
// TODO: implement command.
break;
case "movestogo":
// TODO: implement command.
break;
}
}
new Thread(new ThreadStart(() => {
Int32 bestMove = engine.GetMove(position);
Terminal.WriteLine("bestmove " + Stringify.Move(bestMove));
}))
{
IsBackground = true
}.Start();
break;
case "stop":
engine.Stop();
break;
case "isready":
Terminal.WriteLine("readyok");
break;
case "quit":
return;
case "perft":
Perft.Iterate(position, Int32.Parse(terms[1]));
break;
case "divide":
Perft.Divide(position, Int32.Parse(terms[1]));
break;
case "draw":
Terminal.WriteLine(position);
break;
case "fen":
Terminal.WriteLine(position.GetFEN());
break;
case "ponderhit":
// TODO: implement command.
break;
case "register":
// TODO: implement command.
break;
case "help":
Terminal.WriteLine("Command Function");
Terminal.WriteLine("-----------------------------------------------------------------------");
Terminal.WriteLine("position [fen] Sets the current position to the position denoted");
Terminal.WriteLine(" by the given FEN. \"startpos\" is accepted for the");
Terminal.WriteLine(" starting position");
Terminal.WriteLine("go [type] [number] Searches the current position. Search types include");
Terminal.WriteLine(" \"movetime\", \"depth\", \"nodes\", \"wtime\", \"btime\",");
Terminal.WriteLine(" \"winc\", and \"binc\"");
Terminal.WriteLine("perft [number] Runs perft() on the current position to the given");
Terminal.WriteLine(" depth");
Terminal.WriteLine("divide [number] Runs divide() on the current position for the given");
Terminal.WriteLine(" depth");
Terminal.WriteLine("fen Prints the FEN of the current position.");
Terminal.WriteLine("draw Draws the current position");
Terminal.WriteLine("stop Stops an ongoing search");
Terminal.WriteLine("quit Exits the application");
Terminal.WriteLine("-----------------------------------------------------------------------");
break;
}
}
}