Check and raise is nothing more than a weapon to destabilize the opponent. This is what in the jargon of poker is said to ambush. The purpose of the check and raise is to destabilize the opponent, but also evaluate in a discreet hand strength.
Example of check and raise in position UTG (Under The Gun, or when it is the first to speak):
1. You check
2. Another player checks
3. The third player (button) raises to three times
4. You re-raise the bet of the third player to double its revival
At this time the third player begins to be a whole series of questions … What’s going on? Because he raises after me? He has a great play? He realized my bluff? Etc. ..
The third player, who is the dealer and therefore one of the last point, can try to take away the pot. Raises again without thinking, regardless of the spin that in your hand. The problem is that you had already re-raised, and this may lead you to believe that you hold a great game. From here, enjoy a psychological advantage over him. If the opponent begins his attempt to take away the pot with one hand medium or medium-low, will simply pass your bet (in the worst case take a moment before you do, just to give the impression of thinking about …)
You continue, in spite of everything, if he follows your re-raise is because there are very strong possibility that it has a strong hand. The next time around, do not open it with determination. Maybe you’re a trap to steal your chips. Make a check or rather the small blind and wait to see his reaction. If open (that is, if it points a sum more or less consistent), withdrawn.
You can also opt for a blocking bet. That is, points in pre-flop, your opponent bets, you follow him. In flop, depending on your game (you have undoubtedly played a respectable) starts to play up to 70% of the pot. In general, if your opponent does not do anything on the flop, it is because they simply withdraw. If you follow or raises, then get on your guard. He may have a hand that can win your. In this case, again, you’d better withdrawals.