“Short-term gains from daily tactical puzzles: A randomized study using Shredder’s Puzzle of the Day” — not real, but typical structure.
The Puzzle of the Day is a central feature across the Shredder product line, designed to fit seamlessly into a player’s daily routine.
The puzzles are updated every day and typically offer : Easy, Medium, and Hard. Features of Shredder Daily Puzzles
While many sites offer daily tactics, Shredder is uniquely respected because of its world-class engine.
The puzzle interface is intuitive; you simply click and drag pieces to the target squares. If the solution requires multiple moves, the engine will respond to your correct inputs until the sequence is complete.
It sounds like you're referring to the feature from the Shredder Chess software (by Stefan Meyer-Kahlen) or its mobile/online versions. There isn't a single widely known academic paper specifically titled "Chess Puzzle of the Day Shredder" , but here’s what you might be looking for — or what researchers have studied in that space:
The "Puzzle of the Day" format has become a staple of chess improvement, and Shredder’s iteration offers specific benefits:
A relevant research area is "Effect of daily tactical training on chess performance" — often using Shredder, Chess.com, or Lichess puzzles. Example paper format:
