private boolean testHorizontal(String[][] allMarkers) {
        for (int i = 6; i >= 0; i--) {
            for (int j = 0; j < 4; j++) {
                if ("_".equals(allMarkers[i][j])) {}
                else  {
                    if (allMarkers[i][j].equals(allMarkers[i][j+1]) && 
                           allMarkers[i][j].equals(allMarkers[i][j+2]) &&
                            allMarkers[i][j].equals(allMarkers[i][j+3]))
                        return true;
                }  
            }
        }
        return false;
    }