nowfound

Life & fun · May 6, 2026

GridSum

iOS Game, Puzzle, Math

What it does

I've been obsessed with logic puzzles for years, so I built one. GridSum: a 7×7 grid of numbers. Each row and column has a target sum at the edge. Select which cells add up to it. One solution. Pure logic. No guessing. ✅ Free ✅ Daily puzzle (fresh every day) ✅ 20 puzzle packs if you want more ✅ No forced ads, no pay-to-win If you like Sudoku, Kakuro, or anything that makes your brain work — give it a shot. 👇 iOS: https://apps.apple.com/us/app/gridsum-math-puzzle/id6762402160

Does the same job

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    Corral – A Visual Logic Puzzle About Enclosing Numbers2025 · mohammed321.github.io · ▲26

    Hey HN! I just finished building a puzzle game called Corral, and I’d love to share it with you. It’s a logic puzzle played on a rectangular grid, where some of the cells contain numbers. Your goal is to mark which cells are inside a single continuous loop that encloses all the numbers. For each numbered cell, the number tells you how many cells are visible in the four orthogonal directions (up, down, left, right) until a wall of the loop is hit, plus the cell itself. So a cell with a 2 must see one empty cell before hitting the loop boundary. Gameplay is all about deduction: you can mark…

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