Pairdoku: Logic Game

Fill the grid with two kinds of tiles, like apples and oranges. Every row and column must hold the same number of each, and no three of a kind may sit in a row. Every puzzle has exactly one solution, so you can solve it with pure logic and never need to guess.

HOW TO PLAY
• Tap an empty cell and pick a tile.
• Give every row and column an equal number of both tiles.
• Never line up three of the same tile in a row or column.
• As you progress, "=" and "×" links appear: cells joined by "=" hold the same tile, and cells joined by "×" hold different tiles.
• Once colored regions appear, each region must also hold an equal number of both tiles.

FEATURES
• Every puzzle has a single solution
• New rules are introduced one at a time with short tutorials
• Stuck? A hint shows you the next logical move
• A wrong tile costs a heart, and you can retry the same puzzle anytime
• Tile designs change as you progress
• No time limit, so play at your own pace