LogiCue

What LogiCue is

LogiCue is a daily logic puzzle that turns you into a detective of numbers. Each day, a mysterious machine operates under a single secret rule. Your job is to discover that rule by feeding it numbers from 0 to 999 and watching what it outputs. You have up to eight experiments to gather clues, but you don't have to use them all. When you feel confident, you can attempt to prove your hypothesis. The machine will present three numbers you've never seen, and you must predict all three outputs correctly to win. If even one prediction is wrong, the machine wins. The fewer experiments you use, the better your result, rewarding efficient deduction. This is pure logic—no trivia, no dictionary knowledge, just observation and reasoning. It's free to play, requires no account or download, and fits neatly into a two-minute daily ritual. Each day brings a fresh rule, so every puzzle is a new challenge. Approach it like a scientist: form a hypothesis, test it, and then prove it.

How to play

Start by typing a number between 0 and 999 and feeding it to the machine. Observe the output carefully—it's your only clue. You can run up to eight experiments per day, but you may stop earlier. Use the results to form a hypothesis about the rule. When you're ready, choose to prove the rule. The machine will give you three new numbers that haven't appeared before. Predict all three outputs. If all three are correct, you win. If any are wrong, the machine wins. Remember, using fewer experiments improves your result, so think before you test.

Tips

1. Start with a few diverse numbers to get a broad sense of the rule before focusing on specific patterns.
2. Don't rush to prove; only attempt when you have a strong hypothesis that explains all observed outputs.
3. Keep track of your experiments—there are only eight per day, so use them wisely.
4. Remember that the three proof numbers are unseen, so your rule must generalize beyond tested values.