Hand Review: Folding Ace-King on the Bubble
A sit & go bubble hand reviewed with real ICM numbers: why a medium stack should fold ace-king to the chip leader's shove, and which hands can call.
By PokerLevelUp Team,
This review puts Bubble Play and ICM into a single decision — the kind that decides whether a tournament is a small profit or a zero. The hand is from a nine-player sit & go, four players left, three paid. Hero holds one of the best hands in poker and faces an all-in from the chip leader. In a cash game it’s an instant call. Here, the numbers say something very different.
Key takeaways
- On this bubble, Hero needs about 72% equity to call — against 46% in chip terms.
- A-K has about 64% against the chip leader's wide shoving range: an easy call in a cash game, a clear fold here.
- Only about QQ+ have enough equity to call; QQ is borderline.
- Folding costs Hero less than 1% of the prize pool; calling and losing costs everything.
- Work these spots out away from the table with an ICM calculator, so you recognise them in play.
The situation
- Format: nine-player sit & go, 4 left, 3 paid. Prize pool 100, paying 50 / 30 / 20.
- Blinds: 100/200, no ante.
| Seat | Player | Stack | Before the hand |
|---|---|---|---|
| Button | A (chip leader) | 4,500 | 22.5bb |
| Small blind | C | 1,500 | 7.5bb |
| Big blind | Hero | 3,000 | 15bb |
| Under the gun | D (short stack) | 1,000 | 5bb |
The chip leader shoves into the big blind
Sit & go · bubble · 4 left, 3 paid · 100/200
Preflop
Pot 300
- D folds
- A moves all-in for 4,500 from the button — they've shoved almost every hand this bubble
- C folds the small blind
- Hero thinks for a long time with A♥K♠… and folds
Folding ace-king feels wrong. Let’s check whether it was.
Step 1: What does a call need in chip terms?
Hero must call 2,800 more (the big blind is already in) to win a final pot of 3,000 + 3,000 + 100 = 6,100.
Chip EV: 2,800 ÷ 6,100 ≈ 46%
That’s the cash-game answer. A-K beats 46% against almost any shoving range.
Step 2: What does it need with ICM?
Using the ICM calculator, Hero works out the prize equity of each outcome:
| Outcome | Stacks (A / C / Hero / D) | Hero’s ICM value |
|---|---|---|
| Fold | 4,800 / 1,400 / 2,800 / 1,000 | 29.29 |
| Call and win | 1,500 / 1,400 / 6,100 / 1,000 | 40.66 |
| Call and lose | Hero busts in 4th | 0 |
Required equity = 29.29 ÷ 40.66 ≈ 72%
The risk premium is about 26 percentage points. Doubling up moves Hero from about 29 to about 41 — a gain of 11 — but busting costs all 29.
Step 3: What equity does A-K actually have?
The chip leader has been shoving very wide at the bubble. A reasonable estimate is about 40% of hands:
Chip leader's button shove (estimate)518 combos · 39.1% of hands
Against that range, from our equity calculations:
| Hero’s hand | Equity vs the range | Call at 72%? |
|---|---|---|
| A-A | 85% | ✔ Call |
| K-K | 77% | ✔ Call |
| Q-Q | 73% | Borderline call |
| J-J | 70% | ✘ Fold |
| T-T | 66% | ✘ Fold |
| A-K | 64% | ✘ Fold |
| A-Q | 62% | ✘ Fold |
A-K is a big favourite against the range — and still well short of what the bubble demands.
Verdict: ✔ The fold is correct. Even against a wider range, A-K doesn’t reach 72%.
Step 4: What did folding cost?
Before the hand, Hero’s ICM value was about 30.0. After folding the big blind it’s 29.3. Folding cost less than 1% of the prize pool. Calling risked losing all of it for a chance to gain 11 — with a 36% chance of busting on the bubble.
Why the medium stack suffers most
Look at the other stacks: D has 5bb and C has 7bb. Both are likely to bust before Hero. If Hero simply waits, they’re very likely to cash — so the chips Hero could win are worth far less than the chips they could lose. That’s the medium-stack squeeze from Bubble Play, and it’s exactly why the chip leader can shove so wide.
The rule Hero wrote down
“On a bubble with shorter stacks still at the table, a medium stack facing a shove from the chip leader needs roughly 70% or more. Call with QQ+ only; fold A-K.”
Re-run spots like this in the ICM calculator after each session, and practise short-stack decisions in the push-fold trainer.
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Hand Review: Folding Ace-King on the Bubble
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