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Classic double-six dominoes against the AI. Match a tile to an open end of the line, draw when you are stuck, and be first to empty your hand. Beat the AI and build a win streak.
You and the AI each draw seven tiles; the rest form the boneyard. Take turns adding a tile to either open end of the line.
A tile is legal if one of its two numbers matches the number showing at an open end. Tap a playable tile to lay it down; if it fits both ends, tap the end you want. The first tile of the game can go anywhere.
If you have no legal tile, tap Draw to take from the boneyard until you can play. When the boneyard is empty and you still cannot move, your turn passes.
First to empty their hand wins. If the game locks up with neither side able to play, the lighter hand — fewer total pips — wins; if both hands have the same pip total, the game is a draw. Each win extends your streak, which is your score; a loss or a draw ends the streak and you start again from zero.
Count the suits, not just the tiles. With seven dominoes you usually hold a glut of one number and a shortage of another; steer the open ends toward the number you have many of, and you will keep playing while the AI is forced to draw. The whole game is a quiet fight over which two numbers sit at the ends.
Shed your doubles early. A double matches only one number and never changes an end, so it can only leave your hand while that number is showing — and every other tile of that number that gets played makes it harder to place. When a double fits, it is usually the right play: in our simulation of this exact game, playing a double whenever one fits raised the win rate against the AI from about 52% (random legal play) to about 66%.
Pip count is a tiebreak, not a plan. About one game in five ends locked, and then the lighter hand wins — but leading with your heaviest tile every turn barely helps (about 53% versus 52% in the same simulation). Play doubles first, and among the rest pick the tile that keeps the ends on numbers you hold plenty of. Remember that equal pips in a locked game is a draw, and a draw ends your streak just like a loss.
Watch what the AI draws. Every time it goes to the boneyard it has told you it lacks both end numbers, so if you can keep both ends on the numbers it just failed on, you choke its options and force more draws. Late in the hand, denying the suit it needs is often worth more than rushing your own count down.