OESD

Open-ended straight draw: four ranks in a row that a card at either end completes, 8 outs. J-Q-K-A and A-2-3-4 fill at one end only: 4 outs.

Example

9♣ 8♦ on 7♠ 6♥ 2♣: any 10 or any 5 makes a straight.

Also written: open-ended straight draw, open-ender, open ended straight draw.

Related

Practise it in 5 minutes Counting outs, a short free lesson.

Quads is for adults, 18 and over. It teaches with play chips only: there is no real money, ever.