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Number Duel
A free math strategy game: pick numbers, claim cells, win
umber Duel is a free browser number strategy game. No signup, no ads, any device. Pick a number (0–9). Two numbers combine to hit a target — sum or product. Claim the matching cell on a 5×5 board, connect four in a row to win. Fifteen Duel: claim numbers 1–9, make three that add to 15. The winning triples map to the magic square — tic-tac-toe with a math twist. 3 modes • Bot opponent • Multiplayer via link • Daily challenge • 5 languages
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...
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About Number Duel on Product Hunt
“ A free math strategy game: pick numbers, claim cells, win”
Number Duel was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #130 on the daily leaderboard. umber Duel is a free browser number strategy game. No signup, no ads, any device. Pick a number (0–9). Two numbers combine to hit a target — sum or product. Claim the matching cell on a 5×5 board, connect four in a row to win. Fifteen Duel: claim numbers 1–9, make three that add to 15. The winning triples map to the magic square — tic-tac-toe with a math twist. 3 modes • Bot opponent • Multiplayer via link • Daily challenge • 5 languages
Number Duel was featured in Strategy Games (5.8k followers), Puzzle Games (4.3k followers) and Education (78.6k followers) on Product Hunt. Together, these topics include over 32.6k products, making this a competitive space to launch in.
Who hunted Number Duel?
Number Duel was hunted by love mars. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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