Open-Ended Straight Draw in Poker

An open-ended straight draw in poker is a situation where a player holds four consecutive cards and needs one of two possible cards to complete a straight. This draw is considered powerful because it provides multiple outs, increasing the likelihood of improving the hand on the turn or river.

What Is an Open-Ended Straight Draw?

An open-ended straight draw, also referred to as an OESD, occurs when you have four sequential cards, such as 6 7 8 9 , and can complete the straight by hitting either a 5 or a 10. This flexibility gives you eight outs—four cards on each end of the sequence—making it a valuable draw in both cash games and tournaments.

Example of an Open-Ended Straight Draw

Imagine a Texas Hold’em hand where you hold 7 8 and the flop comes 6 9 2 . In this case:

  • A 5 or 10 on the turn or river will complete your straight.
  • You have eight outs: 4 fives and 4 tens remaining in the deck.

Odds of Completing an Open-Ended Straight Draw

The likelihood of completing an open-ended straight draw depends on the stage of the hand:

ScenarioOdds (Ratio)Percentage (%)
Hitting on the Turn5:117%
Hitting on the River5:117%
Hitting by the River (Turn + River)2.2:131.5%

These probabilities make the OESD a statistically favorable draw to chase under the right pot odds.

Strategies for Playing an Open-Ended Straight Draw

Effectively playing an open-ended straight draw requires knowing when to apply aggression or caution.

When to Play Aggressively:

  • Semi-Bluffing: Use the draw to apply pressure, especially in position.
  • Pot Odds and Implied Odds: Bet or call if the potential reward outweighs the risk.

When to Play Cautiously:

  • Board Texture: Avoid overcommitting on paired or flush-heavy boards.
  • Opponent Reads: Fold if opponents show significant strength and pot odds don’t justify continuing.

FAQ

How is an open-ended straight draw different from a gutshot?

An open-ended straight draw has eight outs, while a gutshot (inside straight draw) has only four outs.

Should I always bet with an OESD?

Not always. Consider factors like position, board texture, and opponents’ tendencies before deciding.

What are pot odds for an open-ended straight draw?

Pot odds should justify calling relative to the 17% chance of hitting on the next card or 31.5% by the river.

Can an open-ended straight draw be part of a stronger draw?

Yes, it can be combined with a flush draw, significantly increasing your outs and equity.