Lesson overview
River Check-Raise as a Frequency Play
Why solvers check-raise some rivers ~30% of the time — and what they mix in
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Inside the full lesson
Why does a solver check-raise the river 30% of the time with the same hand it just calls 70% of the time?
In the full lesson, you work through this scenario with interactive examples.
River check-raise is one of the lines that separates believers in mixed strategies from people who memorized "C-R = trap with monsters." Solvers actually mix the action — sometimes calling with the same hand they raise — because the indifference math at the C-R node demands it. Learning to read this node correctly is the difference between bluff-catching and getting bluffed.
What you’ll learn
- The difference between trap-style and frequency-style check-raises
- Why the same hand sometimes calls and sometimes raises (indifference math)
- How to defend against a river C-R when villain's range is polarized
From the full lesson
Trap-style vs. frequency-style C-R
Referenced activities and other examples are available in the full lesson after sign-in.
These are two different lines that look identical at the table.
Trap-style C-R (rare):
- Villain bets, you check-raise with the absolute nuts only.
- Range: top set, straight flush, second nuts.
- Frequency: ~3-5% of nodes.
- Used in: low-SPR situations, vs. specific villains who barrel three streets and never expect to face a raise.
From the full lesson
Why indifference math demands mixing
Referenced activities and other examples are available in the full lesson after sign-in.
The math: if you only call, villain over-values. If you only raise, villain under-bluffs. Mixing makes villain indifferent.
Setup: river, polarized villain bet of pot. Pot was 100, villain bets 100. You're facing a 100 raise to 200 if you C-R.
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