Simply you have to edit the 3 options and try to guess the scores of the matches, so for example you can add 3 different results for the Bournemouth - Chelsea
So basically is to fill 9 scores, with the most probable results that you think that can be the final score of the matches.
If for example you add a 1-2 for the Bournemouth - Chelsea and finally this is the real score, basically, you will have a result well guessed.