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https://github.com/Noratrieb/minmax.git
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is winning
This commit is contained in:
parent
125990e659
commit
ac8486962d
2 changed files with 216 additions and 168 deletions
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@ -10,185 +10,244 @@ import java.util.Scanner;
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*/
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public class Connect4ArenaMain {
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static final int WIDTH = 7;
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static final int WIDTH = 7;
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static final int HEIGHT = 4;
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static final int HEIGHT = 4;
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static final int NOMOVE = -1;
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static final int NOMOVE = -1;
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public static void main(String[] args) {
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new Connect4ArenaMain().play(new RustPlayer(), new GreedyPlayer());
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}
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public static void main(String[] args) {
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new Connect4ArenaMain().play(new RustPlayer(), new GreedyPlayer());
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}
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static String toDebugString(Stone[] board) {
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var sb = new StringBuilder();
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for (int r = 0; r < HEIGHT; r++) {
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for (int c = 0; c < WIDTH; c++) {
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var value = board[r * WIDTH + c];
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sb.append(value == null ? "." : (value == Stone.RED ? "X" : "O"));
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}
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sb.append("-");
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}
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return sb.toString();
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}
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static String toDebugString(Stone[] board) {
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var sb = new StringBuilder();
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for (int r = 0; r < HEIGHT; r++) {
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for (int c = 0; c < WIDTH; c++) {
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var value = board[r * WIDTH + c];
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sb.append(value == null ? "." : (value == Stone.RED ? "X" : "O"));
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}
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sb.append("-");
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}
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return sb.toString();
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}
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Connect4Player play(Connect4Player red, Connect4Player blue) {
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if (red == blue) {
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throw new IllegalStateException("must be different players (simply create two instances)");
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}
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var board = new Stone[WIDTH * HEIGHT];
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red.initialize(Arrays.copyOf(board, board.length), Stone.RED);
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blue.initialize(Arrays.copyOf(board, board.length), Stone.BLUE);
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var lastMove = NOMOVE;
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var currentPlayer = red;
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for (int round = 0; round < board.length; round++) {
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var currentColor = currentPlayer == red ? Stone.RED : Stone.BLUE;
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System.out.println(HumanPlayer.toPrettyString(board) + currentColor + " to play next...");
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lastMove = currentPlayer.play(lastMove);
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if (lastMove < 0 || lastMove >= WIDTH * HEIGHT) {
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throw new IllegalStateException("move is outside of valid range: " + lastMove);
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}
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if (board[lastMove] != null) {
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throw new IllegalStateException("position " + lastMove + " is already occupied @" + toDebugString(board));
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}
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if (lastMove > WIDTH && board[lastMove - WIDTH] == null) {
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throw new IllegalStateException("position " + lastMove + " is mid-air @" + toDebugString(board));
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}
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board[lastMove] = currentColor;
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if (isWinning(board, currentColor)) {
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System.out.println(
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HumanPlayer.toPrettyString(board) + "...and the winner is: " + currentColor + " @ " + toDebugString(board));
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return currentPlayer;
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}
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currentPlayer = currentPlayer == red ? blue : red;
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}
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System.out.println(HumanPlayer.toPrettyString(board) + "...it's a DRAW @ " + toDebugString(board));
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return null; // null implies a draw
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}
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Connect4Player play(Connect4Player red, Connect4Player blue) {
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if (red == blue) {
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throw new IllegalStateException("must be different players (simply create two instances)");
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}
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var board = new Stone[WIDTH * HEIGHT];
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red.initialize(Arrays.copyOf(board, board.length), Stone.RED);
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blue.initialize(Arrays.copyOf(board, board.length), Stone.BLUE);
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var lastMove = NOMOVE;
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var currentPlayer = red;
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for (int round = 0; round < board.length; round++) {
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var currentColor = currentPlayer == red ? Stone.RED : Stone.BLUE;
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System.out.println(HumanPlayer.toPrettyString(board) + currentColor + " to play next...");
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lastMove = currentPlayer.play(lastMove);
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if (lastMove < 0 || lastMove >= WIDTH * HEIGHT) {
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throw new IllegalStateException("move is outside of valid range: " + lastMove);
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}
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if (board[lastMove] != null) {
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throw new IllegalStateException("position " + lastMove + " is already occupied @" + toDebugString(board));
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}
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if (lastMove > WIDTH && board[lastMove - WIDTH] == null) {
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throw new IllegalStateException("position " + lastMove + " is mid-air @" + toDebugString(board));
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}
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board[lastMove] = currentColor;
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if (isWinning(board, currentColor)) {
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System.out.println(
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HumanPlayer.toPrettyString(board) + "...and the winner is: " + currentColor + " @ " + toDebugString(board));
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return currentPlayer;
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}
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currentPlayer = currentPlayer == red ? blue : red;
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}
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System.out.println(HumanPlayer.toPrettyString(board) + "...it's a DRAW @ " + toDebugString(board));
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return null; // null implies a draw
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}
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boolean isWinning(Stone[] board, Stone forColor) {
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// TODO: provide an implementation
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throw new IllegalStateException("Not implemented yet");
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}
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boolean isWinning(Stone[] board, Stone forColor) {
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var increment = 0;
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for (int i = 27; i >= 0; i--) {
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if (forColor != board[i]) {
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increment = 0;
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continue;
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}
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public enum Stone {
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RED, BLUE;
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// Horizontal reset
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if (i == 20 || i == 13 || i == 6) {
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increment = 0;
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}
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public Stone opponent() {
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return this == RED ? BLUE : RED;
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}
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}
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increment++;
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// Horizontal
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if (increment == 4) {
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return true;
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}
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public interface Connect4Player {
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if (i > 20) {
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// Vertical
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var vertical = true;
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for (int y = i - 7; y >= 0; y -= 7) {
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if (board[y] != forColor) {
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vertical = false;
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break;
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}
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}
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if (vertical) {
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return true;
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}
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// Diagonally
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if (i <= 24) {
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var diagonal = true;
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for (int y = i; y >= 0; y -= 7 - 1) {
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if (board[y] != forColor) {
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diagonal = false;
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break;
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}
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}
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if (diagonal) {
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return true;
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}
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}
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/**
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* Called before the game starts and guaranteed to only be called once per livetime of the player.
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*
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* @param board the starting board, usually an empty board.
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* @param colorToPlay the color of this player
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*/
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void initialize(Stone[] board, Stone colorToPlay);
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if (i >= 24) {
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var diagonal = true;
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for (int y = i; y >= 0; y -= 7 + 1) {
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if (board[y] != forColor) {
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diagonal = false;
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break;
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}
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}
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if (diagonal) {
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return true;
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}
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}
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}
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}
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return false;
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}
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/**
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* Perform a next move, will only be called if the Game is not over yet.
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* Each player has to keep an internal state of the 4x7 board, wher the 0-index is on the bottom row.
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* The index-layout looks as:
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* <pre>
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* 21 22 23 24 25 26 27
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* 14 15 16 17 18 19 20
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* 7 8 9 10 11 12 13
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* 0 1 2 3 4 5 6
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* </pre>
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*
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* @param opponendPlayed the last index where the opponent played to (in range 0 - width*height exclusive)
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* or -1 if this is the first move.
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* @return an index to play to (in range 0 - width*height exclusive)
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*/
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int play(int opponendPlayed);
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}
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public enum Stone {
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RED, BLUE;
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/**
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* An abstract helper class to keep track of a board (and whatever we or the opponent played).
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*/
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public abstract static class DefaultPlayer implements Connect4Player {
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public Stone opponent() {
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return this == RED ? BLUE : RED;
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}
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}
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Stone[] board;
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public interface Connect4Player {
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Stone myColor;
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/**
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* Called before the game starts and guaranteed to only be called once per livetime of the player.
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*
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* @param board the starting board, usually an empty board.
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* @param colorToPlay the color of this player
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*/
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void initialize(Stone[] board, Stone colorToPlay);
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@Override
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public void initialize(Stone[] board, Stone colorToPlay) {
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this.board = board;
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myColor = colorToPlay;
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}
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/**
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* Perform a next move, will only be called if the Game is not over yet.
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* Each player has to keep an internal state of the 4x7 board, wher the 0-index is on the bottom row.
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* The index-layout looks as:
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* <pre>
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* 21 22 23 24 25 26 27
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* 14 15 16 17 18 19 20
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* 7 8 9 10 11 12 13
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* 0 1 2 3 4 5 6
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* </pre>
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*
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* @param opponendPlayed the last index where the opponent played to (in range 0 - width*height exclusive)
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* or -1 if this is the first move.
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* @return an index to play to (in range 0 - width*height exclusive)
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*/
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int play(int opponendPlayed);
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}
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@Override
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public int play(int opponendPlayed) {
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if (opponendPlayed != NOMOVE) {
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board[opponendPlayed] = myColor.opponent();
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}
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var playTo = play();
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board[playTo] = myColor;
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return playTo;
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}
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/**
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* An abstract helper class to keep track of a board (and whatever we or the opponent played).
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*/
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public abstract static class DefaultPlayer implements Connect4Player {
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/**
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* Givent the current {@link #board}, find a suitable position-index to play to.
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* @return the position to play to as defined by {@link Connect4Player#play(int)}.
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*/
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protected abstract int play();
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Stone[] board;
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}
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Stone myColor;
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public static class HumanPlayer extends DefaultPlayer {
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@Override
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public void initialize(Stone[] board, Stone colorToPlay) {
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this.board = board;
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myColor = colorToPlay;
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}
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static String toPrettyString(Stone[] board) {
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var sb = new StringBuilder();
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for (int r = HEIGHT - 1; r >= 0; r--) {
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for (int c = 0; c < WIDTH; c++) {
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var index = r * WIDTH + c;
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if (board[index] == null) {
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if (index < WIDTH || board[index - WIDTH] != null) {
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sb.append("\033[37m" + index + "\033[0m ");
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if (index < 10) {
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sb.append(" ");
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}
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} else {
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sb.append("\033[37m.\033[0m ");
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}
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} else if (board[index] == Stone.RED) {
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sb.append("\033[1;31mX\033[0m ");
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} else {
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sb.append("\033[1;34mO\033[0m ");
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}
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}
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sb.append("\n");
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}
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return sb.toString();
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}
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@Override
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protected int play() {
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System.out.println("where to to put the next " + myColor + "?");
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var scanner = new Scanner(System.in, StandardCharsets.UTF_8);
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return Integer.parseInt(scanner.nextLine());
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}
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@Override
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public int play(int opponendPlayed) {
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if (opponendPlayed != NOMOVE) {
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board[opponendPlayed] = myColor.opponent();
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}
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var playTo = play();
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board[playTo] = myColor;
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return playTo;
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}
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}
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/**
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* Givent the current {@link #board}, find a suitable position-index to play to.
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*
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* @return the position to play to as defined by {@link Connect4Player#play(int)}.
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*/
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protected abstract int play();
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public static class GreedyPlayer extends DefaultPlayer {
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}
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@Override
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protected int play() {
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for (int c = 0; c < WIDTH; c++) {
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for (int r = 0; r < HEIGHT; r++) {
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var index = r * WIDTH + c;
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if (board[index] == null) {
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return index;
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}
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}
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}
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throw new IllegalStateException("cannot play at all");
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}
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}
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public static class HumanPlayer extends DefaultPlayer {
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static String toPrettyString(Stone[] board) {
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var sb = new StringBuilder();
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for (int r = HEIGHT - 1; r >= 0; r--) {
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for (int c = 0; c < WIDTH; c++) {
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var index = r * WIDTH + c;
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if (board[index] == null) {
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if (index < WIDTH || board[index - WIDTH] != null) {
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sb.append("\033[37m" + index + "\033[0m ");
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if (index < 10) {
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sb.append(" ");
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}
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} else {
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sb.append("\033[37m.\033[0m ");
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}
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} else if (board[index] == Stone.RED) {
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sb.append("\033[1;31mX\033[0m ");
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} else {
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sb.append("\033[1;34mO\033[0m ");
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}
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}
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sb.append("\n");
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}
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return sb.toString();
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}
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@Override
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protected int play() {
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System.out.println("where to to put the next " + myColor + "?");
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var scanner = new Scanner(System.in, StandardCharsets.UTF_8);
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return Integer.parseInt(scanner.nextLine());
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}
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}
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public static class GreedyPlayer extends DefaultPlayer {
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@Override
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protected int play() {
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for (int c = 0; c < WIDTH; c++) {
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for (int r = 0; r < HEIGHT; r++) {
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var index = r * WIDTH + c;
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if (board[index] == null) {
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return index;
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}
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}
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}
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throw new IllegalStateException("cannot play at all");
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}
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}
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}
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@ -3,8 +3,6 @@ package ch.bbw.m411.connect4;
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public class RustPlayer extends Connect4ArenaMain.DefaultPlayer {
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private static native int rustPlay(byte player, byte[] board);
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private static native boolean isWinning(byte player, byte[] forColor);
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static {
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// This actually loads the shared object that we'll be creating.
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// The actual location of the .so or .dll may differ based on your
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@ -29,15 +27,6 @@ public class RustPlayer extends Connect4ArenaMain.DefaultPlayer {
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return boardBuf;
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}
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public static boolean isWinning(Connect4ArenaMain.Stone[] board, Connect4ArenaMain.Stone forColor) {
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byte player = switch (forColor) {
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case BLUE -> 0;
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case RED -> 1;
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};
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byte[] boardBuf = RustPlayer.encodeBoard(board);
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return RustPlayer.isWinning(player, boardBuf);
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}
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@Override
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protected int play() {
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byte player = switch (this.myColor) {
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