The Impossible Shift is a constraint-based puzzle centered on the complexities of work scheduling and fairness. Presented as a challenge to cover demanding shifts, such as a Friday rush, it explores the difficulties and small disasters that can arise when attempting to construct a fair and workable schedule for a team.
The puzzle incorporates a set of specific rules and constraints: every shift must be assigned to someone certified for that role, no individual can be scheduled in two places simultaneously, and each person’s stated availability must be strictly respected. Hourly work caps are enforced rigidly, with a stated example of a 40-hour maximum. While personal preferences may be adjusted, doing so only affects the conscience, not the formal score. Shifts can be split once at the top of an hour, with splitting counting as a move and merging being free. The system tracks and displays the current state of the schedule, allowing users to reset, solve, and view results as they work through the puzzle.
The Impossible Shift is described as being made by the creators of Soon, and it is accessible through a web interface.
The Impossible Shift is a Games product. It focuses on making shift scheduling challenges engaging and educational through puzzle gameplay. It is built as a consumer product for puzzle game enthusiasts. The product is available for free. The product ships for the web and the command line.
Behind The Impossible Shift is Soon, and the product first shipped in 2026. Key capabilities include constraint puzzles, shift scheduling, and interactive gameplay.
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