Observations Cards
Twenty-one under an eclipse: a beginner's guide
Eclipse 21 is classic twenty-one with a few simplifications. A handful of decisions do most of the work.
6 minute read · Updated 10 November 2026
The aim
Finish closer to 21 than the dealer without going over. Number cards count their face value, picture cards count 10 and aces count 1 or 11, whichever helps. A hand with an ace counted as 11 is called soft.
What the dealer must do
The dealer has no choices: draw on 16 or less, stand on 17 or more. That rule is your biggest clue. When the dealer shows a 4, 5 or 6, they often have to draw into a bust, so you can afford to stand on lower totals.
Five decisions worth learning
- Always stand on hard 17 or more.
- Stand on 13 to 16 when the dealer shows 2 to 6; hit when the dealer shows 7 or higher.
- Double on 11 against anything, and on 10 against 2 to 9.
- Hit soft 17 or less; it cannot bust with one card.
- Stand on soft 19 or more.
Played that way, Eclipse 21 gives back about 99 per cent of what is staked over the long run. Guessing instead costs a few per cent more.
What we left out
Eclipse 21 has no splitting and no insurance. Both add complexity, and insurance is rarely a good bet. Every hand uses six freshly shuffled decks, so counting cards does nothing here.
Knowing the best play makes the game more interesting, not profitable. In real-money twenty-one the house still keeps an edge.
End of the observation.