Definition of hand range
The "hand range" is the range of hands an opponent can have. Depending on our position, our "hand range" will vary. Obviously, a player will not play all the hands he receives. He will make a selection. Several elements will help him make his selection. His starting position is one of these elements. If you are the first player to speak (the UTG position), you will play a smaller range of hands. If everyone has been lying down to us on the button, we will have a larger fan. If a player has already made an 3bet in the hand, we will have a smaller range of hands to play.
Why do we need to evaluate the hand range?
One of the essential skills of the poker player is to properly evaluate the "hand range" of his opponents. Why is this important? Because it tells him which hands he can play. For example, if we evaluate in a specific situation that a player will only have 5% of the hands in his hand range, we know that he will be very strong. And in order to face that range, we will want to have a small range that is very strong too, otherwise, in the long run, we will lose money. It's also important to make sure that our hand range is not too obvious for our opponents to guess, and to do that, we'll have to swing it.