Dominake – A domino puzzle where 5×6 grids are impossible

Show HN: Dominake – A domino puzzle where 5×6 grids are impossible

Dominake – A domino puzzle where 5×6 grids are impossible is a business in show hn launch.

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Dominake = dominoes + snake. Divide a number grid into domino pairs, then link them into a continuous chain where touching ends match. Under the hood it's two classic problems at once: a Hamiltonian path covers every cell, while the domino chain forms an Eulerian path in the complete graph Kₙ. For 5×6, K₆ has all vertices of odd degree — violating the Euler condition. The grid simply can't exist. Valid sizes: 4×5 (K₅), 6×7 (K₇), 8×9 (K₉). Three difficulty levels controlled by "traps" — false matches that look right but break the chain. Chain mode gives an open snake; Loop mode closes it into an Eulerian circuit. Hold any domino to preview where it can go (green/blue/red for free/partial/bloc

Within the show hn launch space, the company focuses on its core offering rather than a broad product line.

The company is listed at the Show HN launch stage of development.

Website: constarik.github.io/Dominake