Doubling after a split is allowed only when the felt says so

Strategy cards that assume double after split are written for a table that permits it. Splitting, then doubling the new hand, is legal only if the felt says so. On a table that forbids DAS, the second card of a split pair is a hit-or-stand problem, not a double. The most common damage is a pair of small cards against a weak dealer upcard. The chart says split and double. The felt lets you split and then removes the double button. Following the chart in your head, and standing or hitting as if the double had been taken, is a different strategy from the one the card calculated.

A chart that assumes DAS will misplay the ban

The felt line is short. It either allows doubling after a split or it does not. It may also limit the double to certain totals. Read it with the natural payout and the split-aces rule, because those three lines together define the game more than the artwork. A 3 to 2 table that bans DAS is still a different game from a 3 to 2 table that allows it. Basic strategy totals shift on several pair splits. Using the DAS card on the banned table gives away the hands the card expected you to double.

What you do when the double button never appears

Before the session, write DAS yes or DAS no at the top of the note. If the answer is no, put the DAS card away and use decisions for a no-double split. If you cannot find the line, do not invent it from the last casino. Ask the rules panel or watch one split and see whether double is offered. A missing button is the rule in action. Crypto minimums and the cashier balance do not restore a double the felt removed.