William Douries

Maker of NumBizzz Deductive Logic Puzzle

About

I'm Reinventing Grid Puzzles with Deductive Logic and I build logical endurance games that challenge the mind. My latest project, NumBizzz, trades simple Sudoku-style placement for deep deductive subtraction. Based in South Africa 🇿🇦, I’m focused on creating the ultimate 'Aha!' moment for puzzle lovers. Join the Arena!

Links

NumBizzz

William Douries

Badges

Tastemaker

Gone streaking

Maker History

NumBizzz Reinventing grid puzzles with deductive subtraction logic
Sep 2026

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Joined Product HuntAugust 22nd, 2026

Forums

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9d ago

NumBizzz - Reinventing grid puzzles with deductive subtraction logic

NumBizzz is the ultimate test of deductive subtraction. Solve uniquely generated matrices from 3x3 Sprints to 9x9 Marathons. Why Logic Masters love it: 📉 Matrix Logic: Master MRV Insight and Hidden Sum techniques. 🏟️ The Arena: Compete in Daily, Weekly, and Monthly global challenges. 🛡️ Privacy First: Automatic pseudonyms for the Global Top 50. 📊 Official Archives: Export pro Daily Snapshot PDFs of your wins. Find your flow state and conquer the grid! 🧘‍♂️🔢