Should You Split 10s in Blackjack?
Most blackjack players agree — splitting 10s is usually a bad idea. Holding two 10s gives you a total of 20, which is the second strongest hand in the game. Many see no reason to split such a strong position.
But are there ever situations where it makes sense? In this article, we’ll break down when (if ever) you should split 10s, and why this move is so controversial.
The Origins of Splitting 10s in Blackjack
Blackjack has a long history, dating back to the 1700s. Over time, the strategy behind the game evolved — and so did discussions about splitting 10s.
In 1949, John Scrane’s Scrane on Cards suggested splitting 10s when the dealer shows a 5 or 6. While no modern strategy guide recommends this, it’s a glimpse into how blackjack thinking has changed.
Edward Thorp’s 1962 book Beat the Dealer also touched on splitting 10s. Though both books offer valuable strategy tips, their advice on splitting 10s is now considered outdated.
What Does Splitting 10s Mean?
In blackjack, if you’re dealt a pair of matching cards, you have the option to split them into two separate hands. The dealer then deals one additional card to each.
Splitting pairs is a common move, but whether it’s a good idea depends heavily on both your hand and the dealer’s upcard. Not all pairs are created equal — and splitting 10s is particularly tricky.
Is It Ever a Good Idea to Split 10s?
This is one of the most debated moves in blackjack. Some old-school strategies recommend splitting 10s against a weak dealer hand, like a 5 or 6. The thinking is that the dealer is likely to bust, and you might build two strong hands from your 10s.
But computer simulations and modern blackjack strategy charts show that keeping your 20 is almost always the smarter play. Why risk breaking up a near-perfect hand?
In live or online games, splitting 10s can even annoy other players. It’s often seen as greedy or reckless — though technically within the rules. Ultimately, it’s your money and your choice.
When Might Splitting 10s Make Sense?
There are a few rare scenarios where splitting 10s could be worth considering:
- In face-up games: Some players split 10s when the dealer’s hand totals 13, 14, 15, or 16, especially in certain rule variations.
- When counting cards: If you’re an experienced card counter and you know the deck is rich in high cards, splitting 10s can be a calculated risk.
- During blackjack tournaments: Sometimes, taking a bold risk is necessary to stay competitive or advance to the next round.
Outside of these rare moments, sticking with your 20 is typically the better move.
Common Mistakes When Splitting 10s
One of the biggest mistakes players make is ignoring basic strategy. While blackjack seems simple, it takes consistent study to play well.
Another common error is splitting 10s for the excitement. While it can be thrilling, it often leaves you with weaker hands and less money — especially against a strong dealer. Knowing when to split and when to double down is crucial if you want to improve your odds.
Final Thoughts: Should You Split 10s?
If you’re playing to win, the safest choice is to leave your two 10s together. Splitting them rarely improves your chances and breaks up the second-best hand in the game.
It’s also worth noting that other players at the table might frown upon the move, believing it disrupts the flow of cards — though there’s no real evidence to support this.
Unless you’re in a tournament, counting cards, or playing under special conditions, it’s better to hold onto your 20 and wait for a better opportunity to take a risk.