Arpad Elo was a physics professor and chess player who created the Elo rating system in the 1960's to be used in chess tournaments. Since its inception it has been adapted for use in other games and sports such as boxing, wrestling, football, baseball, and basketball. Elo purposefully designed the system to be objective and mathematical.

ELO is a rating system that measures relative skill by looking at who beats whom and by how much. Win against someone higher-rated than you? Your rating goes up more. Lose to a lower-rated player? It drops more.

Nerd Leagues takes that classic system and supercharges it for Magic: The Gathering. Every game you track automatically updates two independent ELO ratings:

• Player ELO — measures you as a player across all your games.
• Deck ELO — measures the specific card list you brought to the table.

Both ratings start at a baseline of 1000 when you create your first league.

You know that moment when your playgroup finishes a game and someone says, “I swear my deck is better than this result”? Or when the guy who always wins with a janky precon suddenly pops off with a tuned list and everyone wonders if it’s him or the deck?

That’s exactly why Nerd Leagues built dual ELO ratings — separate ratings for you (the pilot) and every deck you play. It’s the only system that finally answers the eternal kitchen-table question: “Am I actually good, or is my deck just carrying me?”

This is the part that actually changes how you think about Magic.

Your Player ELO tells the truth about your skill.

It ignores whether you brought the hot new competitive staple deck or a $40 budget brew. It only cares about how well you piloted whatever you sat down with.

Your Deck ELO tells the truth about each deck.

It shows how that specific list performs in your playgroup, against the exact people you play with every week.

Look at the trend, not just the number A player who went from 980 → 1120 over 30 games is climbing fast. That’s more meaningful than someone sitting at 1250 with a flat line.

Check your Deck ELO over time If one deck is consistently gaining ELO while another is bleeding points, you’ve found your strongest (and weakest) builds.

Compare across leagues Your 1180 Player ELO in your casual league might be 920 in the competitive Discord league. That tells you exactly how the skill level differs between groups.

Watch the gap between Player and Deck ELO Big positive gap (Player ELO >> Deck ELO) = you’re a strong pilot who needs better decks. Big negative gap (Deck ELO >> Player ELO) = you’ve got great decks but room to improve your gameplay decisions.

Understanding dual ELO is like turning on the lights in a dark room — suddenly you see exactly what’s working and what needs work. Your playgroup gets better. Your brewing gets smarter. And Friday nights become way more fun when everyone’s chasing their own personal climb.

Use Nerd Leagues to create a league, and run your next game night with the built in life tracker. After just one session you’ll see your Player ELO and every Deck ELO appear on your profile.

Because every game counts.

Every deck has a story.

And now you can finally read both.