HamiLoop vs Nockturn

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.

Every arrow wants out. Tap one and it flies off the way it points — unless something is in the way. ONE RULE CHANGES EVERYTHING An arrow that passes a mirror FLIPS it. So whichever arrow you clear first rewrites the paths of the ones left behind. Not every open arrow is the right arrow. IT TEACHES, THEN IT TESTS The first time a new rule appears the game stops, explains it, and lets you try it in a level with no traps. Mirror, spinning arrow, rock, portal, chained arrow, iced arrow, counted arrow. 300 VERIFIED LEVELS From 7 arrows to 32, on boards from 5x5 to 8x8. Every level is proven solvable by a solver before it ships — and proven to require real thought. THE DAILY DUEL One board a day, identical for every player on earth. Solve it and share your grid: green for every clean move, red for every wasted one. BUILT TO RESPECT YOU - Works completely offline - No account, no sign-up - Never an ad in the middle of a puzzle - Colorblind mode, effects can be turned off - 12 languages