Decision Library
Pair of 10s vs dealer 4 · six decks · dealer stands on soft 17 · double after split allowed
Correct play
StandYou keep a positive expectation of +0.659 per unit here, and standing beats splitting by 0.205 per unit.
Deals a pair of 10s against a dealer 4 in the trainer, graded live.
Per unit bet, six decks, dealer stands on soft 17, computed by the engine.
| Option | EV / unit | vs. best |
|---|---|---|
| StandBest | +0.659 | — |
| Split | +0.454 | -0.205 |
| Surrender | -0.500 | -1.159 |
| Hit | -0.853 | -1.512 |
| Double | -1.707 | -2.366 |
With a pair of 10s you already hold a total the dealer has to beat, and the 4 is weak enough that letting the dealer draw is better than risking your own hand. The dealer busts 39.3% of the time showing a 4, while hitting would bust you 92.2% of the time.
Standing is worth +0.659 per unit; the closest alternative, splitting, comes in at +0.454. That 0.205 gap is the price of taking an unnecessary card.
Players hit a pair of 10s out of fear of the dealer's 4, but the 4 is exactly why you stand. Hitting costs 1.512 per unit versus the correct standing. Over a few hundred of these hands, that is real money handed back.
Same hand, different table conditions. The correct play holds unless noted.
| Table condition | Correct play |
|---|---|
| 6 decks, stands soft 17 (baseline) | Stand |
| 6 decks, hits soft 17 | Stand |
| Single deck, stands soft 17 | Stand |
| Double deck, stands soft 17 | Stand |
| No surrender offered | Stand |
The play is stable: stand is correct across deck counts, the soft-17 rule, and whether or not surrender is offered.
Strategy and expected values from a combinatorial engine validated against Wizard of Odds.