Calling Thresholds PFC OTT vs Polarised bet on 4-flush board

Calling Thresholds PFC OTT vs Polarised bet on 4-flush board

Hey everybody,

I came across an interesting result that I’m trying understand.

PRE: LJ OR 2bb, BB CALL
OTF: QT5 - BB Check, LJ B33%, BB Call
OTT: 4 - BB Check, LJ B125%:

As PFC OTT facing 125% PSB, solver suggests:

Pure calling hands like 93s (93) and even 63s (63), which are lower flushes.
Mixing or even folding hands like AKo with the K (king-high flush).

It seems strange that we are folding or mixing with a higher flush (K) while calling pure with a lower flush (93 or 63).

I came to think that this happens for couple of reasons:

Bluffs Blocking Effects – AKo (K) blocks Villain’s natural bluffs like KJx, KTx, etc., which reduces the number of bluffs in their range, therefore having more value more often.
Flushes Blocking Effects - When having 63 for instance, we block villain from having A9, A3, K9, J9, 98, 99x, 33x...

Does this logic make sense to you? What am I missing?

Screenshot filters only Offsuit hands with a Spade or Suited Hands with spades.


Second screenshot shows that K-high flush when holding AKo, Ks has lower EQ (58%) than 63 (61%)


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01 March 2025 at 11:27 AM
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by Albsoncards k

Bluffs Blocking Effects – AKo (K) blocks Villain’s natural bluffs like KJx, KTx, etc., which reduces the number of bluffs in their range, therefore having more value more often.

KJx is a flush lol. So we do want to block it.

The key difference is that 63 has two clean cards, while AKo only has one. 63 will never block any bluffs, but the offsuit ace will block some. And this skews villain's betting range towards value.

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