Visual / Systems Simulation
The water-system prompt asks for a city dashboard with a reservoir, treatment plants, neighborhoods, pipe flows, and failures. When a pipe bursts or demand spikes, pressure and supply should change across the city.
Build a 2D simulation of a city's drinking water system: 1 reservoir, 3 treatment plants, a network of pipes, and 20 neighborhoods with varying demand. A demand producer makes households and businesses use water throughout the day (morning shower peak, midday for businesses), and a distribution consumer balances flow from plants to keep pressure stable everywhere....
Fortytwo
Fortytwo Prime passes all five City Water System criteria, showing the full reservoir-plant-neighborhood map, pressure and flow visuals, time-based demand, event triggers, and live event feedback.
Gemini 3.1 Pro passes the map, demand, event trigger, and live response checks, but parameter visualization is only partly reliable because some pipe connections appear decorative and burst events can target lines outside the visible flow.
