Defending the Open
Defending as CO
Two openers behind you now — and equity realization starts to matter.
18 min
14
Defending the Open
What "Defending as CO" teaches
Two openers behind you now — and equity realization starts to matter.
It sits inside Defending the Open: Learn to defend from every seat — HJ, CO, BTN, SB and BB — building a complete fold/call/3-bet response to an open raise position by position, the same way you built your opening ranges.
What you'll learn
- Equity realization preflop
- Domination
- Suitedness preflop
- Connectedness preflop
- Pocket pair value
- Opener range strength
How the interactive lesson works
The full lesson is 14 steps long. Each step asks you to commit to a decision before the answer is revealed, then explains why the correct line works — the reveal is what makes the concept stick.
Create a free account to play through it and keep your progress, XP and concept mastery.
Start the interactive lesson
The full 14-step version is free to start with a StackedPoker account. Your progress, XP and concept mastery are saved as you go.
Open the lessonFrequently asked questions
What does the "Defending as CO" lesson cover?
Two openers behind you now — and equity realization starts to matter. It runs 14 interactive steps and takes about 18 minutes.
How long does "Defending as CO" take?
About 18 minutes across 14 steps. Progress is saved after every step, so the lesson can be finished across several sittings.
Do I need an account to take this lesson?
Yes — the interactive version requires a free StackedPoker account so your progress, XP and concept mastery are saved. This page is the free public overview of what the lesson teaches.
Which module is "Defending as CO" part of?
It is part of Defending the Open — I am in the CO. Someone opened. What do I do? Learn every seat's defense, one position at a time.. Learn to defend from every seat — HJ, CO, BTN, SB and BB — building a complete fold/call/3-bet response to an open raise position by position, the same way you built your opening ranges.
Related
Concepts, lessons and tools that build on this page.
- LessonDefending as HJOne seat past first-in — but still facing a tight, strong range.
- LessonDefense RoomRead the open. Read the table. Build the response.
- LessonDefending as BBYou get the best price at the table — and some of the hardest postflop situations.
- ModulePreflop AggressionUnderstand 3-bets, 4-bets, squeezes and the battle for initiative.
- ConceptPositionIP realizes ~10% more equity than OOP with symmetric ranges.
- ModuleBuilding Your Preflop FoundationLearn why position, ranges and stack depth determine which hands enter the pot.
Source: Lesson metadata and objectives come from the StackedPoker curriculum; any theory shown is quoted from the StackedPoker concept registry.