private void initFakeField(Field[][] fields) {
        for (int i = 0; i < sizeX; i++) {
            for (int j = 0; j < sizeY; j++) {
                if ((i % 2 == 0 && j % 2 == 0) || (i % 2 == 1 && j % 2 == 1)) {
                    fields[i][j] = new FakeField(fields[i][j]);
                }
            }
        }
    }