Clackwork

Guess the hidden year. The first clue is a hard one, and is accurate only to the correct year.

After a miss, the next clue is a time range that includes the hidden year. Guess inside a narrower range and you skip straight to it.

When the ranges run out, each clue is accurate only to the hidden year.

Each guess is underlined: yellow if the guessed year is within the next time range, grey if it's not, green if it's the hidden year.

You get six guesses.