From FootballGrid to NBAGrid: why themes make a puzzle more replayable

The same 3x3 format can speak about transit, football, NBA, film, cities or science. What changes is the memory the player brings to the grid.

A football fan does not share the same challenge as an anime fan. Themes give every group a reason to make the game their own.

The more specific a theme is, the more it can become a habit. The goal is to build a broad catalog without losing the simplicity of the daily puzzle.