Rule Variations
- Double down on three cards - This rare option allows doubling down on two or three cards.
- Double on any number of cards - This rare option allows doubling down in almost any circumstance. The advantage is very high at about .23%.
- Redouble - This option exists in many Spanish 21 games. After you double down, you get another chance to double your bet again, twice. So if you have a $10 bet and an eight. You can double to $20. If you draw an Ace, you can double to $40. Draw another and you can double to $80.
- Triple Down - A Russian rule allowing a larger DD bet.
- Hit after Double Down - This rule does not actually exist. However, in some casinos Surrender after Double Down does. Inexperienced dealers will sometimes allow you to Hit after a Double in these casinos. This is very valuable. When this rule is on, the app will wait for you to signal a hit or stand after doubling.
- Double Down Rescue - A new rule that allows a Surrender even after you have doubled down.
- Resplit to three hands - If you split a pair into two hands, and draw another matching card, most casinos allow a resplit to three hands. This option allows Resplit to three hands only. This option does NOT affect resplitting of Aces.
- Resplit to four hands - This very common option allows splitting pairs in one hand up to three times. As a result, up to four hands can be created from one. This option does NOT affect resplitting of Aces.
- Double after Ace Split - Rare rule that allows you to double down after splitting aces, but not to hit.
- Resplit Aces - Adding this option allows resplitting of a pair of Aces to the above option. This option is not common, but more common than people think. It is often found in larger Las Vegas Strip casinos that also offer surrender. It is important to check since the rule is valuable(about 0.1% advantage) in shoe games. (There is little value in single deck games as it is rare that you will get three of the four Aces.)
- Multiple draw after split Aces - Most casinos will only allow one card drawn to each split hand after splitting Aces. This option allows additional draws. The rule adds another .1% advantage in shoe games. This rule is quite common in Internet casinos, but not common in land casinos.
- Split tens must be same value - In most casinos, tens, Jacks, Queens and Kings all count as ten and can be considered the same for splitting rules. In other words, you can split a Jack and a King. A few casinos demand that the cards be exact pairs.
- No Ace Splits - When this option is set, you cannot split Aces. This option is fairly rare and should be avoided.
- No 4, 5, or Ten Splits - This rule is common in the UK. Fours, fives and tens can never be split.