Antimatter – Match the opposites (Mahjong solitaire mechanic)
I love word association games. Here's a playable wordplay game where you match opposite word tiles. After playtesting a lot of mechanics, I think opposites play really nicely with Mahjong solitaire. The current generation of frontier LLMs can't make puzzles that get much more interesting than hot-vs-big-vs-fast. New inferences keep circling a small pool of concepts unless the prompting has a way to get the LLM into new territories of language. Puzzlemaking needs graph traversals. I made 20 levels algorithmically because I work with a huge semantic graph with over 100M edges, built from…
In plain words
Antimatter is a word puzzle game where players match opposite word tiles using a Mahjong solitaire mechanic. It features 20 algorithmically-generated levels created from a semantic graph containing over 100 million word relationships. The game is designed for players who enjoy word association challenges. Each puzzle session randomly selects from the available levels, offering varied combinations of opposite word pairs to match.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
I love word association games. Here's a playable wordplay game where you match opposite word tiles. After playtesting a lot of mechanics, I think opposites play really nicely with Mahjong solitaire. The current generation of frontier LLMs can't make puzzles that get much more interesting than hot-vs-big-vs-fast. New inferences keep circling a small pool of concepts unless the prompting has a way to get the LLM into new territories of language. Puzzlemaking needs graph traversals. I made 20 levels algorithmically because I work with a huge semantic graph with over 100M edges, built from manual lexicography and millions of LLM inferences (various models). I keep exploring what can emerge from this graph. The puzzles are randomly selected; reload to see others. The front-end was built with Claude Code. Maybe someday I'll make this into a mobile game, increase the complexity and peril. If you are a gamedev, feel free to dissect it and borrow any parts.
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