LogiCue

About LogiCue

LogiCue turns the daily puzzle around. Instead of guessing a hidden answer from hints, you run experiments on a number machine. Each day it follows one secret rule: it might add something, shuffle your number's digits, or report a property of the number itself. The day's machine is numbered and dated, with a difficulty label, and is the same for every player.

You type any number from 0 to 999 and press Feed it, and the machine log records what came out. You have eight experiments, but you do not have to use them all: the fewer you need, the better your result. When you are ready you press I cracked it, and the machine gives you three numbers it has never shown you. Predict all three outputs correctly and you win the day; miss one and the machine wins.

There is no vocabulary or trivia involved, only observing, forming a guess and testing it, and a round takes a couple of minutes. It is free with no account, and your streak is kept in the browser. It suits players of rule-guessing games and anyone who likes number patterns.

How to play LogiCue

1. Type a number from 0 to 999 and press Feed it.
2. Read the output in the machine log and think about what rule could produce it.
3. Choose your next numbers to test that idea; you have up to eight experiments.
4. When you think you know the rule, press I cracked it.
5. Predict the outputs for the three new numbers the machine shows you: all three must be right to win.

Tips

• Start with simple inputs such as 0, 1 and 10 to see whether the rule adds, multiplies or works on digits.
• Try a number with repeated digits and one with distinct digits to spot rules about digits.
• Test a number that would break your theory before pressing I cracked it.
• Use fewer experiments for a better result, but not so few that one prediction is a guess.

Questions