A daily logic puzzle with no backend at all

A daily logic puzzle called Solsticio was built with no backend, relying on a deterministic generator and a seed derived from the date. The generator produces a 6x6 board of difficulty 5-7, and two extra gates ensure uniqueness and aesthetics. The same date yields the same seed and board everywhere, without coordination or database. The generator is implemented in JavaScript and Dart, and tests ensure consistency between the two.