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Sports & Analytics Medium #win-probability#analytics

In-Game Win Probability

Live win probability across an NBA game, tied to score, time, and possession.

A free, animated in-game win probability you can read here or embed on any website, from Scrollchart.

In-Game Win Probability

In-Game Win ProbabilityNBA playoff game: Team A win probability across 48 minutes, tied to score and possession

Win probability curve over 48 minutes of a back-and-forth NBA playoff game. Team A surges in Q1, trails badly through Q3 after a 9-point run by the opponent, then mounts a clutch Q4 comeback. The line swings 15-20 percentage points on individual possessions in the final two minutes, making late-game leverage visually unmistakable.

Good for

  • NBA game recap articles showing the momentum arc
  • Clutch performance explainers for analytics audiences
  • In-game coaching decision breakdowns (when to foul, when to rest starters)

Source & accuracy

This in-game win probability is an editorial illustration built to represent the concept accurately. Where it shows figures, they are typical or representative values chosen to make the relationship clear, not a single underlying dataset. The diagram and its explainer are reviewed and maintained centrally, and updated over time as understanding improves.

Win probability evolves with score, time, and possession

In real-time, the probability of a team winning changes as the game unfolds. Early in the game, even a 5-point lead carries limited win probability boost because the opponent has time to score. With two minutes left in a tie game, a single made basket swings win probability sharply. The home team trailing by 3 with 10 seconds left has near-zero win probability, while a 3-point lead with the ball is near-certainty.

Possession matters more in the final moments

Win probability models trained on historical game outcomes account for time remaining, score differential, and whose possession it is. Having the ball in the final minute worth 5-10 percentage points of win probability, depending on timeouts remaining and foul situation. These live probabilities feed sports broadcasts, fantasy sports scoring, and betting markets. A momentum swing that looks dramatic visually (big run, turnover) shows up first as a win probability jump that casual fans sense before data analysts quantify it.

Embed this diagram

Add this animated in-game win probability to your own site. Copy one line of HTML, or use the embed builder for theme and sizing options.

Reference

What this is
A free, embeddable, animated in-game win probability for any website.
Who uses it
Sports blogs.
How to embed
Copy one line of HTML. No signup. No watermark. Works in WordPress, Webflow, Ghost, Substack, plain HTML.
File size
iframe embed, ~80 KB gzipped (loads on demand, does not block your page paint).
License
Free forever. Editorial explainer text included; updated centrally over time.
URL
scrollchart.com/diagram/win-probability-game

Embed format options

Copy the universal HTML snippet, the WordPress shortcode, or an iframe fallback - see the WordPress plugin page for details. Any format keeps the same Core Web Vitals profile and the same explainer text.

Embed snippet 
<div data-scrollchart="win-probability-game" data-scrollchart-v="1"></div>
<script src="https://scrollchart.com/embed.js" async></script>

By embedding, you acknowledge the diagram and explainer text are served from scrollchart.com and may be updated from time to time to reflect new research or to link to relevant sources within the explainer.

Frequently asked questions

Where can I get a free animated "In-Game Win Probability" for my website?
Scrollchart provides "In-Game Win Probability" as a free, embeddable animated diagram you can add to any website with one line of HTML. No signup is required and there is no watermark. The diagram and its explainer text are served from scrollchart.com, so the embed stays current without any maintenance on your end.
How do I embed a in-game win probability in WordPress or a static site?
Paste the HTML snippet from the Scrollchart diagram page into your WordPress post (in HTML/code view), your Webflow embed block, or directly into a static HTML file. No plugin is needed. The diagram loads from scrollchart.com and paints in as the reader scrolls.
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