Ian's Server

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Game: blackbox bridges cube dominosa fifteen filling flip flood galaxies guess inertia keen lightup loopy magnets map mines net netslide palisade pattern pearl pegs range rect samegame signpost singles sixteen slant solo tents towers tracks twiddle undead unequal unruly untangle Manual for dominosa

Tile the rectangle with dominoes (1×2 rectangles) so that every possible domino appears exactly once (that is, every possible pair of numbers, including doubles).

Click between two adjacent numbers to place or remove a domino. Right-click to place a line between numbers if you think a domino definitely cannot go there. Dominoes light up red if two identical ones appear on the grid.