HamiLoop vs Cross Out

HamiLoop: Draw one loop. Pass through every square on the grid exactly once. That's the whole idea behind HamiLoop, and it's harder than it sounds. What looks like a simple rule turns into a real puzzle once the grid grows, and figuring out the right path can take real thought. Grid sizes vary a lot, so difficulty varies with them. Some puzzles are solved in a couple of moments, others take much longer and require some careful planning. With 150,000 preloaded levels, you can pick a size and difficulty that suits your mood, and a new difficult puzzle is added every day if you're after something tougher. There are no timers and no countdowns anywhere in the app, so every puzzle can be worked through at your own pace. Each puzzle is presented with clean, colorful visuals, though the colors are purely decorative and don't affect the solving itself. If you like tackling more than one thing at a time, you can keep several levels open in parallel, so an easier puzzle is always there when you want a break from a harder one. Alongside the daily challenge, an extra hard puzzle is released once a week for players looking for something tougher still. The core idea of the game is inspired by Hamiltonian cycles, a well known concept from graph theory, giving the puzzle a solid mathematical foundation beneath its simple rule.

Welcome to Cross Out: Logic Puzzle Game — One Mark, One Solution, Infinite Deduction. No guessing, no luck — just pure logic. Cross Out is a deduction puzzle built on one elegant rule: place exactly one X in every row, every column, and every colored region — and never let two X's touch. Every board hides a single valid solution, and it's yours to uncover one careful mark at a time. Your mission: read the colored regions, rule out the impossible, and place your X's until every row, column, and region holds exactly one — with none of them touching, not even at the corners. Tap to leave a note, tap again to commit your X, and let the grid guide you to the only answer. Can you find the one solution hiding in over 9 quintillion puzzles? Key Features The Satisfaction of the Perfect Deduction Feel the click of the final X dropping into place and the whole grid locking into solved. No trial-and-error needed — every move follows from logic, and every solved board is earned. 9 Quintillion Unique Challenges The journey literally never ends. From breezy 5×5 grids to dense 10×10 boards packed with colored regions and blocks, the engine generates unique, guaranteed single-solution puzzles that scale with your skill. You'll never solve the same board twice. Clean, Focused Design A calm, distraction-free grid built for deep thinking. Crisp colored regions, clean black X's, no clutter — a modern aesthetic designed for clarity and focus. Master Every Constraint As you climb, the grids fight back. Blocked cells rule out squares entirely, locked clue X's anchor your opening, and the no-touch rule keeps you honest. Every region and every neighbor changes where your next X can go. Smart Solver Hints Lost the thread? The built-in hint doesn't just reveal a square — it points to the next move logic demands, flagging a wrong X to remove or the very cell that's forced. Effortless Marking Drop an X where one already sits in that row, column, or region and the old one simply moves to your new cell. Think out loud on the board — no manual cleanup, ever. Reach the Unreachable How far can your logic carry you? From Level 1 to the 64-bit integer limit — 9,223,372,036,854,775,807 levels — your journey is effectively infinite. Global Leaderboards Climb the ranks worldwide and prove your deduction is the sharpest on the board. Gameplay Highlights: • Pure logic: a fresh take on Star Battle and region-based deduction puzzles. • One-solution guarantee: every board has exactly one valid answer. • No timers, no clocks: just you and the next deduction. • Brain training: sharpens logic, pattern-spotting, and elimination. • Play offline: a lifetime of puzzles, right in your pocket. The grid is set. The solution is waiting. Every X follows from the last. Download Cross Out today and rule out the rest.