[OpenSource] TwentyOne AssistSidebar

About This Script

Twenty-One Assist is a sidebar helper for Roblox Twenty-One games (the 1–11 card format with trump cards and hidden "Husk" cards). It doesn't play for you. It tracks every card that's been dealt, works out what's left, and tells you where you stand so you can make better calls each round.

Author:@Skidder

As of October 5, 2026, this runs correctly on Potassium for PC.

Functionality on mobile devices is currently unconfirmed (feel free to test it yourself).

If you encounter issues, please note that—in addition to providing feedback—this script is open-source.

You are free to modify and optimize it, provided you retain the original author's information.


**How it works**

The script listens to the game's own events (cards being added, trumps played, bet changes, target score updates, table clears and reveals) and builds a picture of the round from them.

It recognizes new rounds automatically and keeps a ledger of cards that have already shown up, even after they leave the table. That means the remaining pool stays accurate when cards get returned or removed mid-round.

**Main features**

- Deck tracker:

All 11 cards sit in a single row, color-coded by status: in your hand (green), opponent's visible cards (red), assigned to the opponent's hidden card (gold), or marked as still in the deck (blue).

You can use the ▲▼ arrows on each card to manually set it to Auto, Husk or Deck if you know something the script doesn't.

- Hidden card deduction:

When you play an N-Card or Perfect Draw and don't get the card, the script figures out the opponent is probably holding it and marks it automatically.

- Husk analysis:

For every possible value of the opponent's hidden card, it shows whether they'd win, tie or lose against your current total. If they have more than one hidden card, it lists every possible combination with its total, color-coded by result.

- Opponent range:

Shows the lowest and highest score the opponent could have, along with their visible total, number of hidden cards and a midpoint estimate.

- Advice panel:

Gives quick suggestions based on your hand: your bust risk if you draw, whether a perfect draw is still possible (and why not, if it isn't), and when you should just stand. It also flags useful trumps you're holding, like a matching N-Card, Perfect Draw, Return/Remove when you've busted, or Go for 17 when the opponent is above 17.

- Trump tracking:

Lists your current trumps and estimates how many the opponent has from what they've gained and played.

- Log:

Shows recent events such as round starts, opponent trump plays, deductions and end-of-round reveals.

**UI**

The UI is a clean, black, minimal sidebar on the right side of the screen. You can resize it by dragging the left edge, and there are sliders at the top for opacity and text size.

Every section can be collapsed, and the ◀ button tucks the whole sidebar into a small tab. Clicks on the panel don't go through to the game, so you won't accidentally interact with the world behind it.

**Controls**

- RightShift: show/hide the sidebar
- F6: copy a raw dump of recent game events to your clipboard (useful for debugging or if the game updates)
- End: fully unload the script and clean up everything it created

Works best in standard "Mr.Sawn"(I've forgotten what it's called.)
Twenty-One tables that use the usual event names.
If the game changes its remotes, the F6 dump makes it easy to see what's different.