---
title: "Push or fold with J4o heads-up"
url: "https://georgelipoker.com/push-fold/heads-up/hand/j4o.md"
canonical_url: "https://georgelipoker.com/push-fold/heads-up/hand/j4o"
last_updated: "2026-10-23"
type: "reference"
summary: "J4o shoves from the small blind at every stack up to 5bb and calls from the big blind up to 4.5bb heads-up. Exact EV at each stack."
related: ["https://georgelipoker.com/push-fold.md", "https://georgelipoker.com/push-fold/heads-up/hand/86s.md", "https://georgelipoker.com/push-fold/heads-up/hand/t6o.md"]
---

# Push or fold with J4o heads-up

J4o shoves from the small blind at every stack up to 5bb and calls from the big blind up to 4.5bb heads-up. Exact EV at each stack.

As the small blind in heads-up play, J4o shoves at every stack up to 5bb and folds deeper, while as the big blind it calls at every stack up to 4.5bb and folds deeper. The game is chips only, blinds 0.5 and 1.

- Shoves every time up to: 5bb
- Calls every time up to: 4.5bb
- Rank of 169: 111
- Combos: 12

## How deep can the small blind shove J4o?

J4o shoves every time as the small blind up to 5bb. At 5bb its shove is worth -0.4528 big blinds against -0.5000 for folding. Past 5bb the chart folds it.

J4o as the small blind, by stack:

| Stack | Shove frequency | Shove EV | Fold EV | Equity when called |
| --- | --- | --- | --- | --- |
| 1bb | 100% | -0.076 | -0.500 | 46.2% |
| 2bb | 100% | -0.153 | -0.500 | 46.2% |
| 3bb | 100% | -0.218 | -0.500 | 44.6% |
| 4bb | 100% | -0.335 | -0.500 | 40.0% |
| 5bb | 100% | -0.453 | -0.500 | 36.7% |
| 6bb | 0% | -0.535 | -0.500 | 35.0% |
| 7bb | 0% | -0.600 | -0.500 | 34.0% |
| 8bb | 0% | -0.656 | -0.500 | 33.6% |
| 9bb | 0% | -0.696 | -0.500 | 32.6% |
| 10bb | 0% | -0.710 | -0.500 | 32.5% |
| 11bb | 0% | -0.742 | -0.500 | 32.3% |
| 12bb | 0% | -0.784 | -0.500 | 32.0% |
| 13bb | 0% | -0.794 | -0.500 | 32.0% |
| 14bb | 0% | -0.817 | -0.500 | 31.8% |
| 15bb | 0% | -0.880 | -0.500 | 31.7% |
| 16bb | 0% | -0.882 | -0.500 | 31.2% |
| 17bb | 0% | -0.889 | -0.500 | 30.7% |
| 18bb | 0% | -0.913 | -0.500 | 30.5% |
| 19bb | 0% | -0.910 | -0.500 | 30.7% |
| 20bb | 0% | -0.916 | -0.500 | 30.9% |

## When should the big blind call with J4o?

J4o calls every time as the big blind up to 4.5bb. At 4.5bb its call is worth -0.9285 big blinds against -1.0000 for folding. At 4.5bb a call breaks even at 38.9% equity, because the big blind has already posted a full blind that folding gives up. Past 4.5bb the chart folds it.

J4o as the big blind, by stack:

| Stack | Call frequency | Call EV | Fold EV | Equity vs shoves |
| --- | --- | --- | --- | --- |
| 1bb | 100% | -0.076 | -1.000 | 46.2% |
| 2bb | 100% | -0.241 | -1.000 | 44.0% |
| 3bb | 100% | -0.531 | -1.000 | 41.2% |
| 4bb | 100% | -0.809 | -1.000 | 39.9% |
| 5bb | 0% | -1.066 | -1.000 | 39.3% |
| 6bb | 0% | -1.358 | -1.000 | 38.7% |
| 7bb | 0% | -1.605 | -1.000 | 38.5% |
| 8bb | 0% | -1.929 | -1.000 | 37.9% |
| 9bb | 0% | -2.144 | -1.000 | 38.1% |
| 10bb | 0% | -2.422 | -1.000 | 37.9% |
| 11bb | 0% | -2.889 | -1.000 | 36.9% |
| 12bb | 0% | -3.201 | -1.000 | 36.7% |
| 13bb | 0% | -3.519 | -1.000 | 36.5% |
| 14bb | 0% | -3.786 | -1.000 | 36.5% |
| 15bb | 0% | -4.213 | -1.000 | 36.0% |
| 16bb | 0% | -4.500 | -1.000 | 35.9% |
| 17bb | 0% | -4.883 | -1.000 | 35.6% |
| 18bb | 0% | -5.270 | -1.000 | 35.4% |
| 19bb | 0% | -5.639 | -1.000 | 35.2% |
| 20bb | 0% | -5.956 | -1.000 | 35.1% |

## What makes J4o different from similar hands?

J4o is 12 combos out of the 1,326 two-card hands and ranks number 111 of the 169 starting-hand classes by equity against a random hand. From the small blind, J4o shoves cleanly 8.5bb shallower than J4s (5bb against 13.5bb). From the big blind, J4o calls cleanly 1.5bb shallower than J4s (4.5bb against 6bb). The offsuit version has three times as many combos but gives up the flush equity of its suited twin.

## Where can I check other hands like J4o?

The stack pages show the full shove and call charts at each depth, and the hands closest to J4o in strength, along with J4s, have pages of their own. The combos page counts the specific hands that make up J4o and how card removal changes them.

Related pages:

- [All hands and stacks heads-up](https://georgelipoker.com/push-fold.md)
- [Push or fold chart at 5bb](https://georgelipoker.com/push-fold/heads-up/5-bb.md)
- [Push or fold chart at 4bb](https://georgelipoker.com/push-fold/heads-up/4-bb.md)
- [Push or fold with J4s](https://georgelipoker.com/push-fold/heads-up/hand/j4s.md)
- [Push or fold with 86s](https://georgelipoker.com/push-fold/heads-up/hand/86s.md)
- [Push or fold with T6o](https://georgelipoker.com/push-fold/heads-up/hand/t6o.md)
- [J4o combos and rank](https://georgelipoker.com/combos/j4o.md)
- [Push or fold calculator](https://georgelipoker.com/tools/push-fold-calculator.md)

## How were the numbers for J4o computed?

We solve a chips-only game for two players: small blind 0.5, big blind 1, no ante, equal stacks. Starting hands are the 169 classes, weighted so that shared cards are impossible, and equity comes from counting every five-card board. The solver plays itself with best responses, averages them, and fixes the hands on the edge so they are exactly indifferent.

Source: GeorgeLiPoker's own heads-up solver, run on its exact preflop equity table.

## Questions

**Is J4o a shove at 10bb heads-up?**

No. At 10bb the small blind folds J4o: shoving is worth -0.710 big blinds and folding -0.500.

**Should the big blind call a shove with J4o at 15bb?**

No. At 15bb calling with J4o is worth -4.213 big blinds against -1.000 for folding, so the chart folds.

**Why does J4o change from a shove to a fold as stacks grow?**

Deeper stacks put more chips at risk for the same blinds, and the big blind can afford to call a smaller share of hands. J4o shoves every time only up to 5bb.

## Related

- [Heads-Up Push or Fold Charts, 1 to 20bb](https://georgelipoker.com/push-fold.md)
- [Push or fold with 86s heads-up](https://georgelipoker.com/push-fold/heads-up/hand/86s.md)
- [Push or fold with T6o heads-up](https://georgelipoker.com/push-fold/heads-up/hand/t6o.md)