ply moves enabled.

Engine.cpp

@@ -26,6 +26,7 @@ string inputString = "";
 bool runProgram = true;
 bool styleRandom = false;
 Board board;
+int chosenPly = 3;
 Moves movePick;
 string engineMove = "";
 
@@ -73,7 +74,7 @@ void inputGo()
 {
 	cout << "Going...." << endl;
 	engineMove = "";
-	engineMove = movePick.bestMove(board.moveBoard(), board.getTurn(), styleRandom, board.getIsPassent(), board.getEnPassent(), 1);
+	engineMove = movePick.bestMove(board.moveBoard(), board.getTurn(), styleRandom, board.getIsPassent(), board.getEnPassent(), chosenPly);
 	cout << "bestmove " + engineMove << endl;
 }
 void inputQuit()

Moves.cpp

@@ -1633,20 +1633,12 @@ string Moves::available(string boardPositions, bool whoseTurn, bool isPass, char
          */
 }
 
-string Moves::bestMove(string boardPositions, bool whoseTurn, bool styleRandom, bool isPass, char enPass, int plyMoves){
+string Moves::plyMove(string boardPositions, bool whoseTurn, bool isPass, char enPass, int plyMoves){
+	plyMoves--;
 	string candidateList = Moves::available(boardPositions, whoseTurn, isPass, enPass);
 	string chosenMove = "";
 	int currentEval = 0;
 		if (candidateList.size() > 0){
-		if (styleRandom) {
-			// Make a random move.
-			srand((int)time(0) + candidateList.size());
-			int r = (rand() % (candidateList.size()/5));
-				for (int a = 0; a < 4; a++) {
-				chosenMove += candidateList[(5*r)+a];
-				} // End random move.
-		} else {
-			// Not random, so make educated moves.
 			currentEval = evaluations.getEval(boardPositions);
 			cout << "Current eval: " << " time " <<  (int)time(0) << " eval "<< currentEval << endl;
 			int moveEval = 0;
@@ -1667,7 +1659,6 @@ string Moves::bestMove(string boardPositions, bool whoseTurn, bool styleRandom,
 					boardPositions[first] = '-';
 					moveEval = evaluations.getEval(boardPositions);
 					cout << "Move eval: " << chosenMove << " eval " << moveEval << " places " << boardPositions << endl;
-					plyMoves--;
 					if (whoseTurn){
 						// White's turn, higher is better.
 						if ( moveEval > bestEval ) {
@@ -1687,10 +1678,76 @@ string Moves::bestMove(string boardPositions, bool whoseTurn, bool styleRandom,
 								bestEval = moveEval;
 								}
 							}
+							
+						try {
+							if (plyMoves > 0){
+							whoseTurn = !whoseTurn;
+							string nextMove = plyMove(boardPositions, whoseTurn, isPass, enPass, plyMoves);
+							whoseTurn = !whoseTurn;
+							int third =((nextMove.at(0) - 'a' + 1) + (((nextMove.at(1) - '1') * 8) - 1));
+							int fourth =((nextMove.at(2) - 'a' + 1) + (((nextMove.at(3) - '1') * 8) - 1));
+							char thirdPieceHolder = boardPositions[third];
+							char fourthPieceHolder = boardPositions[fourth];
+							boardPositions[fourth] = boardPositions[third];
+							boardPositions[third] = '-';
+							int newMoveEval = evaluations.getEval(boardPositions);
+							cout << "Move eval: " << chosenMove << " eval " << moveEval << " places " << boardPositions << endl;
+							if (whoseTurn){
+								// White's turn, higher is better.
+								if ( newMoveEval > bestEval ) {
+									chosenMove = proposedMove;
+									bestEval = newMoveEval;
+									} else if ( newMoveEval == bestEval && (int)time(0)%2 == 0) {
+										chosenMove = proposedMove;
+										bestEval = newMoveEval;
+										}
+								} else {
+									// Black's turn, lower is better.
+									if ( newMoveEval < bestEval ) {
+									chosenMove = proposedMove;
+									bestEval = newMoveEval;
+									} else if ( newMoveEval == bestEval && (int)time(0)%2 == 0) {
+										chosenMove = proposedMove;
+										bestEval = newMoveEval;
+										}
+									}
+								boardPositions[third] = thirdPieceHolder;
+								boardPositions[fourth] = fourthPieceHolder;
+							}
+						} catch (...) {
+						cout << " Exception " << endl;
+						} // End try/catch block
 							boardPositions[first] = firstPieceHolder;
 							boardPositions[second] = secondPieceHolder;
 				} // End candidate list moves.
+		} else {
+		// candidate list is 0.... game over.
+		}
+	return chosenMove;
+}
+
+string Moves::bestMove(string boardPositions, bool whoseTurn, bool styleRandom, bool isPass, char enPass, int plyMoves){
+	string candidateList = Moves::available(boardPositions, whoseTurn, isPass, enPass);
+	string chosenMove = "";
+		if (candidateList.size() > 0){
+		if (styleRandom) {
+			// Make a random move.
+			srand((int)time(0) + candidateList.size());
+			int r = (rand() % (candidateList.size()/5));
+				for (int a = 0; a < 4; a++) {
+				chosenMove += candidateList[(5*r)+a];
+				} // End random move.
+		} else {
+			// Not random, so make educated moves.
+			try {
+				chosenMove = plyMove(boardPositions, whoseTurn, isPass, enPass, plyMoves);
+			} catch (...) {
+			cout << " Exception " << endl;
+			} // End try/catch block
 			}// End not random.
+			if (chosenMove == "") {
+			// Chosen move is still blank, and list is not 0, that is wrong, so pick a random move.
+			chosenMove = bestMove(boardPositions, whoseTurn, true, isPass, enPass, plyMoves);}
 		}// End candidates list.
 	return chosenMove;
 }

Moves.h

@@ -28,9 +28,12 @@ public:
 	// All available moves.
 	string available(string boardPositions, bool whoseTurn, bool isPass, char enPass);
 	
-	// Best move.
+	// Choose a move, random or weighted.
 	string bestMove(string boardPositions, bool whoseTurn, bool styleRandom, bool isPass, char enPass, int plyMoves);
 	
+	// Weighted move, considering ply.
+	string plyMove(string boardPositions, bool whoseTurn, bool isPass, char enPass, int plyMoves);
+	
 	// Is the king safe?
 	bool isKingSafe(string boardPositions, bool whoseTurn);