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This tool will help you establish your open range when there are 4 players (including you) at the table. These are the GTO (Game Theory Optimal) opening ranges for different situations (number of antes, cards in hand, position, number of blinds). This tool is particularly useful when you don't know the players at the table, which is quite common if you play in a big poker room. The openings will be the best openings you can make by default. You will notice that the results will be colour coded. For more information on this colour coding, you can check out this page where we break it down in detail.

To find out if you can open your hand or not, fill in the fields and press "Can I open". If you press "Can I open" and nothing happens, you have omitted to fill in a field

As far as the "First card" and "Second card" sections are concerned, it will not make any difference whether you enter for example Q and T or T and Q. An important detail, however, is to indicate whether or not the cards are matched (of the same colour). Since matching cards have a better equity in the long run than non-matching cards, you can open a little wider with matching cards

An example

You are on the final table of a tournament, only 4 players left including yourself, you have 76 big blinds on the cutoff with heart QT. There are currently antes at 10%. Can you open? And what should you do if one of your opponents 3-bets you? To find out the answer, you will obviously use our tool by filling in each section. You will now get your answer:

open call 3-bet

QTs tells us that the cards match (QTs in hearts). CO tells us that we were from the cutoff position (often written simply as CO). Our stack was 76 BB, so it was between 75 and 100 BB. We can open the hand and call a 3-bet from one of our opponents. Sometimes calling a 3-bet will be suggested because our hand will not be strong enough to make a 4-bet as is the case here and other times, as will sometimes be the case with some AAs, the 3-bet call will be suggested to incorporate big hands into our "call 3-bet" range. We do not want our opponent to be able to read the exact range with which we call 3-bets and for this reason we will be concerned to balance this call range. To give the example of AA, when faced with a 3-bet, sometimes we will make a 4-bet since we obviously have the best hand, but other times we will just call the 3-bet in order to underrepresent our hand. Also, if we call 3-bets with both QTs and AA, we become harder to read