ITI0011RUS:Gomoku

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MyStrategy.java: <source lang="java"> package gomoku.strategies;

import java.util.ArrayList;

import gomoku.*;

public class MyStrategy implements ComputerStrategy {

private static final int MINIMAX_DEPTH = 4;

@Override public Location getMove(SimpleBoard board, int player) {

int maxScore = -Integer.MAX_VALUE; Location bestMove = null; ArrayList<Location> possibleMoves = getPossibleMoves(board, player); for(Location move : possibleMoves) { int moveScore = minimax(board, player, MINIMAX_DEPTH); if(moveScore > maxScore) { maxScore = moveScore; bestMove = move; } } return bestMove; }

private ArrayList<Location> getPossibleMoves(SimpleBoard board, int player) { return new ArrayList<Location>(); }

private static final int MAX_SCORE = 100;

private int minimax(SimpleBoard board, int player, int depth) { /* * Stop condition */ int score = getScore(board,player); if ( score == MAX_SCORE || // WIN-condition score == -MAX_SCORE || // LOSS-condition timeIsOver() || // time limit depth == 0 ) return score;

/* * Iterate over possible moves */ ArrayList<Location> possibleMoves = getPossibleMoves(board, player); int bestScore; if(player == SimpleBoard.PLAYER_WHITE) { // maximizing player

bestScore = Integer.MAX_VALUE;

for(Location move : possibleMoves) { makeMove(board, move, player); // board contains the new state int curScore = minimax(board, 3-player, depth-1); if(curScore > bestScore) bestScore = curScore; undoMove(board, move); // rollback }

} else { bestScore = -Integer.MAX_VALUE;

for(Location move : possibleMoves) { makeMove(board, move, player); // board contains the new state int curScore = minimax(board, 3-player, depth-1); if(curScore < bestScore) bestScore = curScore; undoMove(board, move); // rollback } }

return bestScore; }

private void makeMove(SimpleBoard board, Location move, int player) {

}

private void undoMove(SimpleBoard board, Location move) {

}

private boolean timeIsOver() { return false; }

private int getScore(SimpleBoard board, int player) { return 0; }

@Override public String getName() { return "Tudengi nimi"; }

}

</source>