Lumen Sudoku
Solve Classic Sudoku or the Constellation variant with rising star paths.
Finished a round? Try another BeanNest mind game.
Fourfold 24 is a calm exact-arithmetic puzzle: combine four number tiles exactly once with +, -, x, and / until one value equals 24. Daily serves a deterministic four-puzzle Quartet, while Practice offers difficulty-selectable replay without countdown pressure.
Four number tiles from 1 to 9 start on the board. Tap a number, choose +, -, x or /, then tap a second number: both are replaced by their exact result. Repeat until every original tile has been used once and the last value is exactly 24. Example with 1, 1, 1 and 8: add 1 + 1 to get 2, add 1 to get 3, then multiply 3 x 8. Daily opens straight into today's four puzzles; Practice lets you pick a difficulty.
Yes. Of the 495 possible four-number hands from 1 to 9, 404 are solvable and only those are served. Daily never needs a fraction; the seven hands that do appear only in Expert Practice.
Each UTC date has four puzzles in rising order: Warmup, Build, Twist, and Challenge. The Daily streak counts a date only after all four are finished, and an Assisted solve still counts.
Nudge, First step, and Solution never play a move for you, but any hint marks that puzzle Assisted. It keeps your streak but does not replace a clean personal best. Undo and Reset are not hints.
There is no countdown. Only active solving time is tracked, pausing while the tab is hidden, and progress stays in your browser. A shared Daily result shows completion marks, time, and streak, never the numbers or answers.