static void Main(string[] args)
{
/*
* TO DO:
*
* Chess Essentials:
* [DONE] Pawn Promotion
* [DONE] Castling
* [DONE] En Passant
* [DONE] Draw by repetition
*
* Speed Enhancers:
* [DONE] Transposition Tables (Zobrist Hashing)
* [DONE] Principle Variation
* [DONE] Aspiration Windows
* [DONE] Null Move Pruning (disable towards end game to avoid zugzwang positions)
*
* Accuracy Enhancers:
* [DONE] "Hole" detection and bonuses if knight occupies hole
* [DONE] Space (based on pawn structure)
* [DONE] Bonuses for rooks on open or semi open files
* [DONE] Bonuses for bishops that are on same color as opposing pawn, opposite color of friendly pawn
* [DONE] Deductions for poor king safety prior to end game
* [DONE] Deductions for weak pawns
*
* General Purpose:
* [DONE] Change engine to have a time limit as well as a depth limit (stops at whichever comes first)
* [DONE] Add Syzgy Table bases
* [DONE] End game detection & King bonus square adjustments in end game
* [DONE] Bug Fixes (run full game with VerifyBoard enabled in BoardData to look for bugs)
* [DONE] Optimizations (all but move gen have been optimized)
*
*/
//for testing
//String test = "2B5/PKP5/2P5/8/8/8/k7/8 w - - 0 1";
//starting position
String test = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq h8 0 1";
BoardData board = new BoardData(test);
Conversion c = new Conversion();
board.DisplayBoard();
Engine com = new Engine(board);
int depth = 8;
int stop_time = 4000;
/*
* //---------------------------------------------------------------------------------------------------------------------------
* //uncomment this if you want to perform an efficiency test. Tip: More tests = more accurate results
*
* double numTests = 10000;
* var timer1 = System.Diagnostics.Stopwatch.StartNew();
* for (int i = 0; i < numTests; i++)
* {
* com.GetBestMove(1, 1000);
* }
* timer1.Stop();
* double time1 = timer1.ElapsedMilliseconds;
* Console.WriteLine("\nTime taken: " + time1 + "ms, or an average of " + numTests * 1000 / time1 + " calls per second.");
*
* //% of total time is under the assumption that the time taken for the computer to choose a move is 5 seconds
* //Only accurate if numTests is close to the amount of times the tested operation is performed when choosing a move
* Console.WriteLine("Roughly " + (time1 * 100 / 5000) + "% of total time taken.");
* Console.WriteLine();
*
* //---------------------------------------------------------------------------------------------------------------------------
*/
//numMoves is a necessary precaution, as there is currently no detection for draw by lack of material
int numMoves = 0;
//this while loop simulates a chess game.
while (numMoves < 300)
{
Console.WriteLine("Enter a command: ");
String command = Console.ReadLine();
//h command denotes a "human" move; simply plays the move entered
//format: "h " + [beforeSquare] + [afterSquare] + [Enpassant Flag]"
//Enpassant flag = (isEnPassantMove ? [any character] : [null])
if (command.Substring(0, 1).Equals("h"))
{
Console.WriteLine("\nMove number: " + ++numMoves);
string hmove = command.Substring(2, command.Length - 2);
com.DoMove(c.MoveToNum(hmove, board));
}
//c command denotes a "computer" move; computer calculates and plays move for whichever player's turn it is
else if (command.Equals("c"))
{
Console.WriteLine("\n\nThinking... ");
var timer3 = System.Diagnostics.Stopwatch.StartNew();
int move = com.PerformBestMove(depth, stop_time);
timer3.Stop();
double time3 = timer3.ElapsedMilliseconds;
Console.WriteLine("\nMove number: " + ++numMoves);
Console.WriteLine("Nodes visited: " + com.numNodes);
Console.WriteLine("Time taken: " + time3 / 1000.0 + " seconds");
Console.WriteLine("Nodes/s: " + com.numNodes / (time3 / 1000));
com.numNodes = 0;
}
//auto command denotes an auto finish. Computer will play for both sides for the remainder of the game
else if (command.Equals("auto"))
{
while (numMoves < 300)
{
Console.WriteLine("\n\nThinking... ");
var timer3 = System.Diagnostics.Stopwatch.StartNew();
int move = com.PerformBestMove(depth, stop_time);
timer3.Stop();
double time3 = timer3.ElapsedMilliseconds;
Console.WriteLine("\nMove number: " + ++numMoves);
Console.WriteLine("Nodes visited: " + com.numNodes);
Console.WriteLine("Time taken: " + time3 / 1000.0 + " seconds");
Console.WriteLine("Nodes/s: " + com.numNodes / (time3 / 1000));
com.numNodes = 0;
board.DisplayBoard();
Console.WriteLine();
if (com.isMate || com.DBR)
{
break;
}
}
break;
}
else
{
Console.WriteLine("Invalid command.\n");
continue;
}
board.DisplayBoard();
Console.WriteLine();
if (com.isMate || com.DBR)
{
break;
}
}
if (numMoves >= 300)
{
Console.WriteLine("The move limit of 300 was reached");
}
else if (com.DBR)
{
Console.WriteLine("Draw By Repetition");
}
else if (com.isMate)
{
Console.WriteLine("You have been checkmated");
}
else
{
Console.WriteLine("Stalemate");
}
Console.ReadKey();
}