What is Jukr? The Daily AI Baseball Challenge Explained
Jukr is a free daily baseball guessing game. Every day at midnight ET, a new mystery MLB player is revealed — and you have six clues to figure out who it is.
The clues start cryptic. They end obvious. That gap is the whole game.
How Jukr Works
Each puzzle gives you six clues about a mystery player. You don't see all six at once — clues reveal themselves after each guess. The first clue might tell you an abstract fact about their career. By clue six, you should be slapping your forehead wondering how you missed it.
The emoji scoring system:
- 🎯 Correct player
- 🔥 5/5 attributes match (very close)
- ⚡ 3-4/5 attributes match
- 🌀 1-2/5 attributes match
- 💨 Complete miss
Every guess is scored against five attributes: same team, same position, same conference, same era, and same division as the mystery player.
After you solve (or run out of guesses), you get a shareable emoji ticker — the play-by-play of your game without spoiling the answer for anyone else.
The Difficulty Curve
This is the part we're most proud of. Jukr scales difficulty through the week like the New York Times Crossword.
Monday puzzles feature legendary superstars with massive career stats. Derek Jeter, Ken Griffey Jr., Albert Pujols. Players whose names you learned before you learned to read a box score.
Friday and Saturday puzzles go deep. Role players with distinct career profiles. Relief pitchers from the '90s. The kind of player that makes serious baseball fans feel validated for knowing.
The middle of the week sits in between — All-Stars, HOF-borderline players, names you know but might not immediately recognize from a handful of stats.
How the Clues Are Generated
Every clue is generated by an AI (Claude) trained on a database of 6,600+ MLB players going back to the Dead Ball Era. Every fact the AI generates is validated against real stats before it's stored. No hallucinations. No made-up career stats. If a clue says "led the AL in strikeouts twice," that happened.
The AI is instructed to write clues that reward baseball knowledge without giving away the name. It avoids mentioning team names directly in early clues, stays away from unique identifying nicknames, and builds from abstract to concrete.
The Rarity Score
When you finish a puzzle, you get a Rarity Score — a number from 1 to 99. Lower is rarer. A Rarity of 3 means fewer than 3% of players who attempted this puzzle solved it the same way you did (same guess count, same path).
It's the same concept as the Immaculate Grid rarity score — a number to flex in the share card.
Who is Jukr For?
Any baseball fan who:
- Plays Wordle every morning and wishes there was a baseball version
- Kills time on Immaculate Grid and wants a different kind of daily challenge
- Knows their way around a career WAR leaderboard
- Wants to settle debates about who really was the best shortstop of the '90s
You don't need an account. You don't need to pay anything. You just need to know your baseball.
Frequently Asked Questions
Is Jukr free?
Yes. Completely free. No ads, no subscriptions, no premium tier.
Do I need to create an account?
No. You can play anonymously. Create an account only if you want to protect your streak across devices.
How many guesses do I get?
Six. Exactly six.
How often does the puzzle change?
Every day at midnight ET. One puzzle per day, the same puzzle for every player around the world.
What players are in the database?
Over 6,600 MLB players going back to 1901. Active players, retired players, Hall of Famers, and deep cuts.
What does "Juked" mean?
"Getting Juked" means the puzzle got you — you ran out of guesses. "Juking it" means you solved it. Baseball has always been a game of deception between pitcher and batter. We liked the metaphor.
Start Playing
Today's puzzle is live. Six clues. One player. New puzzle tomorrow.