Binairo also known as Takuzu is a logic puzzle with simple rules and challenging solutions.

The rules are simple. Binairo is played on a rectangular grid with no standard size. Some cells start out filled with black or white circles. The rest of the cells are empty. The goal is to place circles in all cells in such a way that:
1. Each row and each column must contain an equal number of white and black circles.
2. More than two circles of the same color can't be adjacent.
3. Each row and column is unique.

Zooming
Pinch with two fingers to zoom in/out. If you use a mouse you can use the scroll button.

Moving
Tap and drag to move the puzzle. If you use a mouse you can click and drag with the middle (scroll) button.

Marking
You can tap/click individual cells to change their state.

You can also mark more than one cell at a time. Tap and hold a bit, then move your finger to draw a line.

Game modes and sizes

• You can change the game you play from the "hamburger" menu at the top-right corner.
• You can change the mode / size of the current game from the top menu (click on the down arrow at the top/middle)
• There are 2 modes which you can play
  • Random - this mode loads a random puzzle from the chosen size
  • Quest - this mode requires you to login. You can then solve a sequence of puzzles with increasing difficulty.

Other helpful tips

• You can get rid of the address bar and gain extra playing space by dragging the header or the footer quickly upwards so you scroll the page a bit down. It's tricky and you need practice. iOS8+ users - this will be just temporary until you click something in the bottom bar - sad story I know.
• If you are left handed or just playing with your left hand there is a spacial option in the settings just for you.
• Try the different helpers in the settings - some will make the puzzle too easy for you, others may automate some trivial tasks.