I think Roberto must have said a little more than; Pack the midfield, soak up their pressure and attack in numbers.
Presumably each player is given specific instructions for each game; where to play when we have possession and where to play when we don't, how to play the ball out of defence, and how high to play our defensive line, for example.
Then there are the dead ball situations; how to take our goal kicks, free kicks and corners, and how to defend against theirs. Yesterday, for example, Kone came back to defend corners.
To be honest mate you ain't gonna find what you want on here, most football fans (myself included) won't be able to give you an accurate detailed view of how tactics may have won or lost a team a game
Hence the amount of people who think it's as simple as if a team win the manager got the tactics right, and if they lose he got the tactics wrong. Thats simply not true. Sometimes it is but sometimes you can get the tactics right and lose, or get the tactics wrong and win.
Thats down to other factors, individual performances both good and bad, and luck.
Yesterday i'd say tactically we set up to stiffle Chelsea (both from the start and once Naismith came on) but pushing forward in numbers when we had the chance. That helped us get the win, more so it stopped Chelsea getting very few decent chances.
Obviously Naismith turning into Messi wasn't quite in the tactical plan but his good performance allowed us to win from the decent base the tactics gave us.
And if you can track down Theexecutionersbong's blog, if he still does it he'll be able to give you what you're looking for.