Guess the hidden number. Two figures come back, and never which digits they are. Work it out from the rows you have played.
Right digit, right place. How many.
Right digit, wrong place. How many.
The number is 4172. Guess 4718 and you get one exact, the 4, and two misplaced, the 7 and the 1. Nothing says which.
Signed out, everything works and nothing is kept.
