Lesson 05 · Core decisions · 5 min
Pairs and splitting
Why a pair can play differently from its combined total, plus the anchor rules for aces, 8s, 5s, and 10s.
A pair is not its combined total
A pair offers an option no other hand has: pay an additional wager and turn one hand into two, each starting on the split rank. Whether that option is worth taking depends on the value of a hand that starts on one card of the pair — which is a completely different question from the pair’s combined total.
The anchor pairs prove the point. 8,8 is a weak hard 16, but each 8 can start a much better hand, so you normally split. T,T is 20, an exceptionally strong total; splitting it would trade one strong hand for two uncertain ones, so basic strategy stands.
Your hand
Dealer shows
8,8 vs T — Split
Sixteen loses constantly; two eights each have room to improve. Split even against a ten.
Your hand
Dealer shows
T,T vs 6 — Stand
Twenty needs no help. Splitting tens gives up one of the best hands in the game.
The four anchor pairs
- A,A — split at the trainer’s peek tables. Two hands starting with an ace are valuable enough to justify the added wager, even when each split ace receives only one card.
- 8,8 — normally split to escape hard 16. With H17 late surrender, surrender against an ace; split if surrender is unavailable.
- 5,5 — do not split. Treat the pair as hard 10: double against 2 through 9 at the baseline table, otherwise hit.
- T,T — do not split. Stand on 20.
- 9,9 — split against 2–6 and 8–9, but stand against 7, ten, and ace. Your 18 is already strong enough that opening a second wager is not worth it.
Your hand
Dealer shows
5,5 vs 6 — Double
A pair of fives is a hard 10. Double it exactly as you would any other ten; splitting wastes it.
How DAS moves the chart
Double after split (DAS) lets you double a hand that was created by splitting — most relevant when a split pair catches a third low card. Because split hands become more valuable with DAS available, several marginal pairs cross the line into splitting.
The canonical example: 6,6 against a dealer 2 splits when DAS is allowed and hits when it is not. The same effect moves 2,2 and 3,3 against the smallest upcards. This is why the trainer’s charts are rule-conditional rather than one universal table — a chart learned without DAS is wrong at a DAS table, and vice versa.
Your hand
Dealer shows
6,6 vs 2 — Split (DAS)
With double after split available, 6,6 against a two splits. Without DAS, the same cell is a hit.
Split-ace restrictions
Many tables deal exactly one card to each split ace and count 21 after a split as an ordinary 21, not a natural. Resplitting aces (RSA) and hitting split aces are less common permissions that make an ace split more valuable. At this trainer’s peek profiles, the opening decision remains to split aces; the favorable S17 profile lists RSA because it changes what can happen afterward.
Practice this
Pairs are the smallest chart and the most memorized — make sure 8,8 against a ten feels automatic.
Drill pair decisions