Taking data from two identical slicers

Evening forum,

I'm trying to recreate a lot of the sports analysis which I currently do in Excel into Power BI, and while I'm aware of the concept of a disconnected slicer to feed information into a visual, I'm not sure how it would work with the data I have and what I want it to do.

My data looks like this in a csv:

Player Name - Date of Match - Great Game - Good Game - Average Game - Bad Game

Ian Beale - 21/04/18 - 1 - 4 - 1 - 0

Phil Mitchell - 21/04/18 - 1 - 2 - 1 - 1

Paul Robinson - 21/04/18 - 0 - 2 - 4 - 0

Karl Kennedy - 21/04/18 - 0 - 1 - 3 - 1

which then carries on for thousands of rows, each figure in the last four columns indicating the number of games they have won in a given match.

The sport I'm analysing is turn based, where a great game beats a good game, a good game beats an average game etc, and if both players have the same quality of game, whoever started wins, so in Excel I just grab the sums of each of each of the last four columns, work out the percentage of each column as a sum of all of them, and it's effectively, assuming player A starts the game:

Player A Win Chance = (percentage of games that are great)+(percentage of games that are good*percentage of opponent's games that are not great)+(percentage of games that are average*percentage of opponent's games that are not great or good) etc

The goal is to get two measures - one each for the chances of two players to win a single game that they start. Once I've got that I'm confident I can then use the values in those measures and get the results I want for projecting matches that can span for many games, it's just getting the initial values into a measure that I'm not sure about. What I want to do is have a page on a report where I have two slicers, one for each of the players in the match (I'd also want a date slicer but that doesn't seem relevant to the question), then have the measures look at the data of the players that are selected, pull through the sums of each of the columns (which I have as measures already), then do the logic described in italics above and come up with the chance that each player wins a game that they start. I'm just not sure where to start with this - with work I know the basics of using a disconnected slicer to pick a value and have that alter a visual, but having two of these working at the same time and in conjunction with each other is a whole different level of complexity and I'm not sure where to start. Thanks in advance and let me know if anything's not clear (probable I guess) or if you need some sample data