Fill the grid with owls and foxes: the same number of each in every row and column, never three alike in a row.
Unlimited makes a fresh Binairo (Takuzu) puzzle every time you press New puzzle, so you can practise Tango-style logic for as long as you like, free. Choose a size: 6×6 is a quick warm-up, 8×8 and 10×10 ask you to combine techniques, and 12×12 is a long sit-down solve. Turn on Plus links to add = and × joins between cells, the twist LinkedIn's Tango is known for.
Every generated puzzle is checked to have exactly one solution that the seven techniques in our guide can reach, so none ever needs a guess. The tier under the title says how hard the toughest step can be: tier 1 needs only the basics, tier 2 adds count pressure, tiers 3–4 add look-ahead, and tiers 5–6 add chain reasoning. Each puzzle has a shareable link, so a friend gets the identical grid.
Tap Owl or Fox to choose an animal, then tap cells to place it. With neither chosen, tapping a cell cycles owl → fox → empty. Long-press or right-click for a note. Full rules →