Every now and then when you are wandering around the casino floor of a brick and mortar casino somewhere you might notice some extra little blackjack house rules. Most players see addition house rules as a threat from the house: ‘Oh no! They are coming to take more of my money!’
Sure there are house rules that are aimed at taking your money faster. But they are often found in blackjack variations along with the side bets—which you should be staying away from, by the way.
What needs to be done when an out of the ordinary house rule is spotted is to check it out, see what it is and then think about whether it is to your benefit or theirs. If it is for theirs, keep walking. If it is for yours then sit down and play a few rounds.
One such rule is doubling down on three or more cards. It is not a common house rule, but every now and then it will pop up in casinos.
This house rules does not require a lot of thought as to whether it is good for you blackjack strategy or not.
In general, the double down play is in the player’s favor. For those players who do not do their blackjack strategy homework, doubling down at advantageous times will knock 1.6% off of the house edge. And that is only when you can double on your first two cards.
So logically it follows that if you can double on three or more cards that your opportunities to double down increase. So your odds of making more off the house increase because your opportunities increase.
Those extra opportunities to double down knock 0.2% off the house edge, which makes it a nice addition to your blackjack strategy. It does not knock as much off as a standard double down, but that is because there are not an excessive hands of three or more cards in which it is advantageous to double down on.
But I say that every little bit helps. Think about whether or not these extra house rules will help your blackjack strategy. If they do help, sit and play a few.