today no free pick for the euro 2016, I saw quite difficult to predict. many dangerous match

Games are always difficult to predict. If they were easy then everybody would be rich from gambling. There's usually always a shocker which can screw people over but thats part of the gamble.
yes I mean it is a match between countries is always quite difficult prediction, as yesterday ireland vs german, and german lost.
I think it is easier to predict the club compared national team
But what I think he's trying to say is it's not just International games that have big upsets. Look at Chelsea losing most of their games. Sometimes the big teams lose too but its no exlusive to internationals.