must be one vs Unfinished Window

must be one is a number puzzle built on a single rule — the one in its name. A grid of numbers. Four operators. Combine neighboring tiles with arithmetic and collapse the whole board down to a single 1. That's the entire game: all becomes one. It reads as obvious for about three moves. Then it doesn't. - One rule, no filler — no twenty-minute tutorial, no menus to dig through. You understand it in seconds and spend the rest of your time actually thinking. - Always solvable — every stage is generated so that a solution is guaranteed to exist before you ever see it. If you're stuck, that's on you, not the board. - A climb that keeps widening — early stages stay in single digits; later ones open the range up and the arithmetic gets meaner. - Free, and quick to pick up. One stage on the train; look up an hour later. From office-canard — a one-person studio making small, system-first games. If this one gets its hooks in, there are more small games where it came from.

Inside a serene cathedral sanctuary, warm sunlight awaits to illuminate an intricate stained glass rose window... yet the master artisan left the glasswork unfinished. Only you can deduce the missing pieces, restore the sacred geometry, and let the light flood through once more. Unfinished Window is a pure deductive logic puzzle that merges algorithmic mathematics with the timeless aesthetics of Gothic stained glass art. Free of numbers, free of stressful countdowns, and completely free of guessing. [ TWO ELEGANT RULES - INFINITE DEPTH ] 1. Adjacent glass pieces separated by lead lines cannot share the same color. 2. Each 4-piece structural panel must contain all 4 colors exactly once. [ 100% PURE DEDUCTION - ZERO GUESSWORK ] Say goodbye to trial-and-error puzzles. Every level in Unfinished Window is procedurally carved and verified by an automated deductive reasoning solver. There is always a clear, logical step forward using pure deduction (naked and hidden singles) - never a random guess. [ DUAL-CHANNEL ACCESSIBILITY ] Engineered for everyone, including color-blind players. Every jewel color is permanently paired with a clean, high-contrast geometric motif: - Ruby Red: Sun motif - Amber Gold: Moon motif - Emerald Green: Star motif - Sapphire Blue: Leaf motif Rendered with crisp vector lines, with zero reliance on standard OS emojis. [ ATMOSPHERIC ILLUMINATION ] Completing a window rewards you with a moment of serene contemplation. As your final piece locks into place, lead lines illuminate in warm gold, dynamic light rays sweep across the sanctuary, and glowing dust motes drift peacefully through the air. [ CRAFTED FOR MOBILE EXCELLENCE ] - True One-Handed Ergonomics: Palette and controls placed within natural thumb reach. - 100% Standalone Offline Play: The entire puzzle generation engine runs locally on your device. Play anywhere - on planes, subways, or off-grid retreats. - Native Haptic Feedback: Feel subtle, tactile pulses upon piece placement, conflicts, and victory. - Privacy-First Engineering: Zero trackers, zero logins, zero PII, and minimal battery consumption. Step into the quiet sanctuary. Restore the glass. Let the light shine through. Download Unfinished Window today! [ PRIVACY & TERMS ] - Privacy Policy: https://kaisoftthailand.com/privacy-policy-unfinished-window.html - Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ - Support: https://kaisoftthailand.com/