Lapdle

Lapdle is a daily racing line challenge played in the browser, free and with no account or download. Its main game is the Daily Quali: one real circuit a day, seen from above, with six laps to find the fastest way round it. Everyone gets the same circuit and the same conditions, so laps can be compared.

You choose a line for each corner, early apex, classic or late apex, or move every point yourself, then press Lights out. A car drives your line under a physics model with limits on grip, braking, cornering and power. Each corner comes back coloured for the time it lost against the perfect lap, the fastest line the model can find: purple within 0.05 s, green within 0.15 s, yellow within 0.4 s, red slower. Your best lap earns bronze, silver or gold for its time, or pole when every corner is purple. Some days are wet or run with low downforce, which changes the grip, the perfect line and the medal times. The circuits come from a bank of twelve (Monza, Spa, Silverstone, Suzuka, Monaco, Interlagos, the Hungaroring, Spielberg, Zandvoort, Austin, Barcelona and Imola), so each one comes back about every twelve days, often in different conditions.

The circuits are traced from OpenStreetMap data and drawn with kerbs, run-off and surroundings. Lapdle says it is an independent game, not tied to any racing series or team.

The day's set is five games, counted in a bar at the top of the page: the Daily Quali, Mystery circuit (name a circuit from a few corners), Pit stop (four wheels, then go on green), Higher or lower (ten calls on circuit facts) and Make the corner (one famous corner in 3D). Six more sit beside them: Braking point, Order the corners, Speed trap, Line-up (sixteen tiles in four groups), Aerial view and Lights out. A streak counts the days you play, past Daily Qualis can be driven again from the archive without counting for the streak, and a records page keeps the fastest daily laps on each circuit and the boards of the last 30 days.

The whole site is in English and in Spanish.

It suits motorsport fans who know their circuits and players who like a puzzle with a physical feel, where a small change to one corner shows up straight away in the lap time.