public static double getValue(BoardGame game, Player player) {
if (game.endOfGame()) {
int result;
if (game.getOutcome() > 0) {
result = 1;
} else if (game.getOutcome() < 0) {
result = -1;
} else {
result = 0;
}
return result;
} else {
return Math.tanh(player.evaluate(game.getBoard()));
}
}
public static GameMove chooseBestMove(
BoardGame game, Player player, List<? extends GameMove> moves) {
double bestEval = Float.NEGATIVE_INFINITY;
List<GameMove> bestMoves = new ArrayList<GameMove>();
for (GameMove move : moves) {
double eval = game.evalMove(player, move);
if (eval == bestEval) {
bestMoves.add(move);
} else if (eval > bestEval) {
bestEval = eval;
bestMoves.clear();
bestMoves.add(move);
}
}
return bestMoves.get((int) (Math.random() * bestMoves.size()));
}
public int play(BoardGame game) {
while (!game.endOfGame()) {
List<? extends GameMove> moves = game.findMoves();
if (!moves.isEmpty()) {
GameMove bestMove = null;
if (Math.random() < prob[game.getCurrentPlayer()]) {
bestMove = moves.get((int) (Math.random() * moves.size()));
} else {
bestMove = chooseBestMove(game, players[game.getCurrentPlayer()], moves);
}
game.makeMove(bestMove);
} else {
game.pass();
}
}
return game.getOutcome();
}