Half & half
Every row and column has the same number of zeros and ones.
Daily Takuzu
Equal numbers. No triples. No repeating lines.
4 × 4
Today · UTC0 / 16 filled
Place
Choose light or dark, then fill a blank square.
IN PERFECT BALANCE
A grid well solved.
Two’s the limit
Never place three matching numbers next to each other.
Make each line different
Every row differs from other rows. Every column differs from other columns.
Keyboard shortcuts & given cells
Arrows move between editable squares. Press 0 or 1 to place a number, Delete to erase, and Enter or Space to use your chosen tool. With a grid square focused, Ctrl/⌘ + Z undoes. Squares with a small dot are given clues and stay fixed.
About these Takuzu puzzles
Takuzu, also called a binary puzzle, builds a complete grid from fixed clues. The original finite collection includes 4×4, 6×6 and 8×8 boards, each with one solution. The daily selection follows UTC and repeats within the collection. An unfinished daily puzzle stays open until you choose today’s puzzle.
Learn with a worked example →