Hi PH, I like daily habit type puzzle games but was always missing one around chess so I built it.
It is called Daily Chess Blitz and the gameplay is simple: get as many check mates in one move as possible before the timer runs out.
Right move adds 10sec. Wrong move removes 10sec.
New board puzzles daily.
Completely free, no signup, just a minute a day to keep the brain sharp. It runs on vanilla JS with a Google Sheet backend.