Nuleen Help

Binary puzzles: 0s and 1s, logic only

Nuleen generates binary puzzles in three sizes, 6×6, 8×8 and 10×10, at five levels. Fill the grid with 0s and 1s so that every row and column is balanced, has no three equal digits in a row, and differs from all the others.

Each level asks for its own set of solving techniques. Hints show the next logical step and the technique behind it, so you can learn them one by one. Puzzle type Rare plays puzzles whose solution has only two or four variations.

Play against the clock, or in Zen mode without one. You can also enter puzzles from a newspaper or another app, or make your own. Your best results are kept per size and level, and puzzles you like can be kept as favorites.

Nuleen works offline, has no ads and collects no data.

Contents

Rules, solutions and levels
Playing a puzzle
Your own puzzles, scores and favorites
Privacy policy