I'm trying to improve my Spin&Go/HUSNG game and I've ran in to another question, this time about 3betting all-in.

My question is: why would one decide to 3b ai with a more linear range, instead of a polarized one, when all 3 options are still available (fold, call, 3b). Because as it seems when I run some ranges trough equilab is that when it comes to range vs range, in equity is doesn't matter too much which range you'd jam with (examples below, please feel free to correct on the ranges I've used).

Yet if we would opt to 3bai with a more linear range, our flatting range pre would definitely become more weak. Or is it that when effective stacks get more shallow, relative hand value goes up so the strength of our calling-range sort of stays the same because we can stack off more light?

Note: I've left out JJ-AA in the 3bai ranges as I believe most Villains wouldn't always jam these type of hands in Spins/HUSNG at say 15bb effective.

And actually my biggest concern is: is my thinking just way off here and am I missing something very obvious?

Linear comparison (HERO = BU):

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Equity Win Tie
BU 55.88% 53.51% 2.37% { 77+, A7s+, K9s+, QTs+, A8o+, KJo+ }
SB 44.12% 41.75% 2.37% { TT-22, A4s+, K9s+, Q9s+, J8s+, T8s+, 98s, A7o+, KJo+, QJo }
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Polarized comparison (HERO = BU):


Equity Win Ti
BU 56.32% 54.05% 2.27% { 77+, A7s+, K9s+, QTs+, A8o+, KJo+ }
SB 43.68% 41.40% 2.27% { 99-22, A2s+, J7s-J5s, 97s, 85s+, 75s+, 65s, A7o+, KTo }
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Near-perfect GTO solutions for these spots are available to users of GTORB and Pio.

Some hands (e.g. AA/KK) might make more money by 3-betting smaller, some hands make more money by flatting (e.g. medium-strength suited hands), and some hands play so badly as calls but do so well as shoves (e.g. small pairs, offsuit aces) that they go into the jamming range.
The full solution features a lot of mixing, and the shoving ranges are neither totally polarized or totally linear. Against weaker players, however, you can just jam linearly for pure equity/value (with very few bluffs), and just call or fold your weaker hands.

P.S. I'm a bit confused by the equity results as you listed BU and SB as the positions (I presume you're actually talking about BvB spots), but I was under the impression that at 15bb, it's hands like A2-A7o that become almost mandatory shoves, because they are such crappy hands to flat.

Thanks. Vs weaker players I believe it's a bit easier as you said, and we just jam a fairly strong range and basically never bluff. Unless of course they are weak because they're raise-folding too much, then we can start expanding.

But vs more thinking players it's a bit more tricky to me, also looking at our own ranges. I find it difficult to figure out which types of hands to keep in my flatting range in order to 'protect' that range. And of course his opening % would also make for a big factor.

Say we are playing a Spin and Go, still 3 handed, 15bb effective. We play together for the first time but you think I'm sort of reggish.

I open BT, Sb fold, you're BB. What would you're perceived (assumed?) 3bai calling range be for me? (I myself would say: 44+ A5s+ A7o+ Kjs+ QTs Kqo. Thoughts?). And with which range would you jam over this?

I don't play those games, and I'm not exactly brilliant at knowing what to do in a "standard" tournament resteal spot (because I mostly play satties, which play much nittier), but that calling range looks pretty decent.
For things like this, you're better off looking at the HUSNG sub-forum, a training site (e.g. HUSNG.com) or searching youtube. (I happened to watch a video of iJustGamble playing a $5000 HUSNG vs RedBaron yesterday. It was pretty interesting to see iJG limp-call off 30bb with A8o and get it in good. He also open jammed 28bb with A7s. GTO strats are weird.)

I would guess that the BB vs your range can profitably jam pretty much any Ax, any pair, and any two Broadways, suited or otherwise, along with some SCs, because you've obviously got a folding range as well as a calling range. It might be more profitable in general for him to 3-bet smaller with hands like TT+/JTs+, and balance those 3-bets with some random hands that don't do great as calls (K4o, 95s or J3s or something weird like that) but I really don't know. For the calls, anything from KQs to 63s should be fine, but BB should also still have some Ax and Kxo in the flatting range.

The screengrab below won't be particularly helpful for your specific spot, but I'll post this pseudo solution for a range to jam over a limp at 19bb effective in a HUSNG to show you how complex an optimal strategy can be.



The dark red combos (mainly 77-22, offsuit aces) are the shoves, and the lighter red are smaller 3-bets. Green are checks. You'll notice that for many hands every option is viable. e.g. 84s is sometimes a jam, sometimes a small 3-bet, and sometimes a check. A5o is a jam about two thirds of the time and a check one third of the time. The jamming range is definitely somewhat polarized (95s and Q6o appear in it), but it's still pretty strong too (AQo, A8s and 77 are in there). You can get glimpses of similar charts in the GTO Rangebuilder vids on YT, but there might be even better stuff for what you need on the Smart Spin channel or wherever CoffeeYay is posting these days. For a lot of the sub-20bb spots, the solutions are already out there, so BQ is kind of the wrong place to ask. I think Duncelanas is the only HUSNG/spingo reg that posts here frequently, but I doubt he'll share his entire strategy.

Thanks for your post Arty. Bit too tired and drunk now to give a decent response so I'll leave that for tomorrow. Cheers!