Gridsum vs Block Zone!

Every region has a target sum. Swap tiles until every region matches at once. That is Gridsum — a number puzzle built on pure logic. No timer. No lives. No luck. The board is fully knowable and every solution is reachable through arithmetic and planning alone. HOW IT WORKS The grid is divided into colored regions. Each region contains numbered tiles and a target sum. Swap any two tiles and watch the totals shift in real time. Find the arrangement where every region simultaneously hits its target — puzzle solved. Gridsum starts with a simple 2×2 grid and two regions. As difficulty climbs, the challenge deepens: 3×3 and 4×4 grids, irregular region shapes, and tiles that belong to two regions at once — where a single swap changes two totals simultaneously. Every puzzle is solvable through logic. No guessing required. HUNDREDS OF HANDCRAFTED LEVELS Work through the difficulty tiers: Tutorial, Beginner, Apprentice, Intermediate, Advanced, Expert, Veteran, and Pro, Master, and Grandmaster. Each level is rated by move count. Solve within the target — no hints, no resets — to earn a PERFECT badge alongside your stars. Every level tracks your personal best time and move count. See exactly how much you've improved. DAILY CHALLENGE A new arithmetic puzzle drops every day, seeded by the date. Your streak counts any day you play at least one level — the daily challenge or any regular level. Your current streak and best streak are always visible on the home screen. GLOBAL LEADERBOARD Compete with players worldwide across four ranked categories: total stars earned, solving speed, perfect solves, and highest level reached. Set a display name and see exactly where you stand. BUILT FOR FOCUS Dark background. Glowing neon region borders. Clean geometric typography. Gridsum is designed for players who want a clean, distraction-free logic puzzle — no characters, no story, no countdown pressure. Just numbers and logic. Accessibility options: colorblind mode with pattern fills on region borders, reduce motion, and large text. Free to play with ads. A one-time purchase permanently removes all ads — no subscription, no recurring charge. If you enjoy sudoku, KenKen, Wordle, or number puzzles generally, Gridsum gives you something more spatial and strategic to work through. Download for free and start your first streak today.

Block Zone: A Vibrant and Strategic Puzzle Experience! Dive into Block Zone, a visually rich brain-teaser that pushes your spatial reasoning to the limit. The core mechanic is easy to grasp: just snap the brightly colored shapes into their corresponding grid spaces until they are entirely filled. Your journey will quickly ramp up in complexity, introducing intricate board designs, mixed-color sections, and even neutral, colorless zones that demand thoughtful strategy. Each new stage brings fresh puzzles to solve, keeping your mind engaged and entertained. How to Play - The Basics: Match the vividly colored shapes to their respective board sections for a clean and satisfying fit. - Think Strategically: Arrange your pieces with foresight to conquer complex board setups and tricky mechanics. - Keep the Pace: Solve efficiently within the time limits to keep the energy high and your puzzle-solving skills sharp. Key Features - Thoughtful Progression: What begins as an easy task gently evolves into a deeply rewarding test of logic and placement. - Unique Mechanics: Navigate around clever twists like screwed shapes, sliding shutters, pinned elements, and linked pieces that keep the gameplay fresh. - Stunning Aesthetics: Immerse yourself in beautifully vivid graphics that make every level visually engaging. Block Zone was crafted specifically for players seeking a harmonious blend of mental stimulation and active focus. Come explore the colorful boards and treat yourself to a wonderfully vibrant puzzle journey!