Antes & range pressure
Antes change tournament poker before a single hand is dealt. In a cash game the pot starts as the two blinds — dead money of 1.5 big blinds. Switch antes on and every player at the table tosses in extra dead chips each orbit, so the average pot grows while the stacks behind it shrink. Every price in the game recalculates: opens steal more, defends get cheaper, and both ranges widen at once. This is why mid-stage tournament play looks so much looser than early cash-like levels even at identical effective depths.
- Recount the dead money.Pot = blinds + antes; restate every steal and defend against the bigger base.
- Widen the opener.The same raise risks the same chips but contests a bigger prize — marginal steals clear.
- Widen the defense.The caller's required equity falls with the bigger pot; folding becomes more expensive.
- Reprice shoves too.Short-stack jams buy a fatter uncontested prize, so jamming ranges widen with the antes.
Worked example: the big blind's price vs a button open
Fixed spot: nine-handed, standard 0.5/1 blinds, button opens to 2.25bb. Only the ante level changes between rows. The breakeven equity below is the pot-odds formula from the foundations track applied to each row's pot — plain arithmetic, not this app's output.
| Structure | Total antes | Pot before BB acts | BB breakeven equity |
|---|---|---|---|
| No antes | 0.00bb | 3.75bb | 25.0% |
| Ante = ⅛ bb | 1.13bb | 4.88bb | 20.4% |
| Ante = ¼ bb | 2.25bb | 6.00bb | 17.2% |
| Ante = ½ bb | 4.50bb | 8.25bb | 13.2% |
Read down the last column: the big blind's calling bar falls by several percentage points as antes grow — which is exactly how much wider its defending range should get. The mirror effect pays the opener: the same 2.25bb steal now wins a bigger uncontested pot, so the button's opening range widens too.