DAS: Double After Split
Updated
DAS stands for double after split: whether you may double down on a hand you created by splitting a pair. It is worth about 0.12% to you, and its absence changes which pairs you should split at all.
- DAS = you may double on a hand made by splitting.
- Worth about 0.12% to the player when allowed.
- Without DAS, several pairs stop being worth splitting.
- Usually not printed on the felt. Ask, or watch a few hands.
What it means at the table
You split a pair of eights against a six. The first eight draws a three, giving you eleven — a hand you would normally double. DAS decides whether you are allowed to.
Where it is allowed, you put out a second bet on that split hand and take one card. Where it is not, you must play the eleven out by hitting.
What it is worth
About 0.12% of your total action — small in absolute terms, and comparable to the effect of moving from eight decks to six. Every rule, priced puts it in context.
The reason it matters more than the number suggests is that it arrives precisely when you are already in a good spot: you split because the dealer was weak, and DAS lets you press that advantage rather than abandon it.
What changes when it is missing
Splitting becomes less attractive, because part of the payoff has been removed. Without DAS you stop splitting several low pairs against weak dealer cards — twos, threes and sixes in particular — and just hit them instead.
This is exactly why why your chart must match. A chart drawn for a DAS table used at a no-DAS table will tell you to split hands that are no longer worth splitting.
How to find out whether your table has it
It is rarely printed. Watch a couple of rounds and see whether anyone doubles on a split hand, or simply ask the dealer — it is an ordinary question and they will answer it.
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By Martin Kosek · every number on this site is computed by us, not copied.
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