Hey Product Hunt! 👋 I'm a solo developer and I built Number Duel because I wanted a quick math game that feels like a real strategy game, not a flashcard quiz. The idea: instead of drilling arithmetic problems, you USE arithmetic to control a board. Pick numbers, combine them to hit targets, and claim cells. The math is the mechanism — the real game is about controlling space and blocking your opponent. Fifteen Duel is my favorite mode. It looks like a simple "pick numbers that add to 15" game, but it's secretly tic-tac-toe played on a magic square. Once you see the pattern, it changes how you think about numbers entirely. Would love to hear what you think! Happy to answer any questions about the design, the math, or the tech stack (Cloudflare Workers + Durable Objects). Try it here: https://numberduel.mathmindpuzzl...

Number Duel

A free math strategy game: pick numbers, claim cells, win

A free math strategy game: pick numbers, claim cells, win