Yeti Theorem highlights principles of the players’ behavior on the flop. The name of the theorem comes from the name of the player, who posted it on the poker forum 2 + 2.
Yeti theorem review
Despite the fact that the statements compiling Yeti theorem are not as relevant as they were at the early stages of poker, they still may be useful in the modern game that differs by more aggressive style.
Statement of the theorem
If your opponent 3-bets on a dry paired flop, it is more than likely is a bluff.
The point of this statement is as follows: when the situation on the board does not allow you to collect strong enough hand (you cannot get a straight or a flush draw), and your raise is re-raised, it is likely to be an attempt of a bluff. This statement refers to the very third raise, and not the re-raise as it is misunderstood by quite a lot of players.
Practical application of the Yeti theorem comes down to the fact that the best response to 3-bet on a dry flop will be 4-bet. Despite some risk, carried by such bet, a significant fold equity of the opponent makes such technique profitable.
Example of Yeti theorem
Player A, playing heads up with player B, holds jack of diamonds – jack of hearts.
The flop: 2 of clubs – 9 of diamonds – 2 of hearts.
Player A starts betting and checks. Player B bets, Player A raises, player B raises. Under the theorem, the opponent’s raise (3-bet) would be likely a bluff.
Assuming that player B holds overpair or two 9, the best solution for him would be to call or to fold, and certainly not to 3-bet. After a check-raise from the player A, such action seems reckless, that’s why it should be suspected as a bluff.
Assuming that player B holds trips of deuces or other advantageous hand, it would be logical of him to apply passive play. This way he would have come to a more profitable option than having 3-betted, and having beaten the opponent out of the game. This example suggests that the only sensible reason for such action is a bluff.
Applying Theorem Yeti, you should take into account many different factors. First of all, we must understand that each paired flop has its own peculiarities. For example, with the AJ hand on the AAJ flop, such action as a 3-bet, may make sense. If we consider micro-limits games, 3-bets are common for them.
Experienced players successfully use this theorem backwind: thoughtful player will take a 3-bet for a bluff, what will allow his opponent with a really strong hand to get sufficient value.