Guess the number
Setup
Changing the range opens a new round — the answer from the last one is not an answer for this range.
Result
Each range keeps its own record.
Your guesses
No guesses yet.
How the round works
When a round opens, one number is drawn at random inside the range. Every time you enter a number you are told only whether the answer is higher or lower, and you close in from there. Your guesses stay below until the round ends.
How few tries can it take
Keep picking the middle of what is still possible and the candidates halve with every guess. That puts 1–100 within seven tries, 1–50 within six and 1–1000 within ten. Start at 50; if the answer is higher go to 75, if lower go to 25.
Does the answer move while you play
It is fixed when the round opens and stays there. Moving it after each guess would make the earlier hints untrue, and nothing on the screen would show it.
Where the record is kept
For each range, only the fewest tries is kept, in this browser's storage. Ten tries on 1–1000 is not the same as ten on 1–50, so the ranges are stored apart. Nothing is sent to a server, and if storage is blocked only the record is lost — the game itself still runs.
How is the share link built
Share puts the numbers into the address and builds a link. Opening that link fills the same card with those numbers, and the person who opened it can start their own round right away. Building a link sends nothing anywhere, it only writes an address.
The address is scrambled so the values are not readable, and changing one character stops the numbers from showing. That catches links garbled in transit or edited by hand. It does not confirm who played the round, or when.