D3C1PH3R

D3C1PH3R hides a number code and gives you a limited number of guesses to find it. Type a sequence of digits and press Enter. Under each guess the game prints two counts: how many digits are exact (right digit, right place) and how many are present (in the code, but somewhere else). It does not say which digits those are, so the work is in reading the counts across several guesses until only one code fits.

The code is the same for everyone each day and grows through the week. Monday and Tuesday are 3 digits with 8 guesses, Wednesday and Thursday 4 digits with 10, Friday and Saturday 5 digits with 12, and Sunday 6 digits with 15. A clock runs from the first guess. Your score starts higher for longer codes, and every guess you save and every second left adds to it. There is no give up button, so you play until you crack it or run out of guesses.

The daily is free and needs no account. Lost Art Games sells Squads, small paid groups with a 30-day free trial, that add the global and squad leaderboards and a calendar of past puzzles; without one you play only today's code. The site shows no ads and has no app: it runs in the browser on a phone or a desktop and can be added to the home screen.

It is one of six dailies from Lost Art Games, with Scuotes, Letterbox, fanimoji, 29GO and alikely. It suits players who like pure deduction with numbers and want the challenge to build over the week.