HamiLoop vs Senbon Kumiki

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.

One piece looks ready to leave. But what will it block next? Senbon Kumiki is a 3D wooden puzzle about finding the right order. Tap a piece to move it in its marked direction. Read the shapes and overlapping layers, then work out how to free them all. MAKE ROOM BEFORE YOU REMOVE A piece that cannot come out yet may still move partway. Shift it to open a path, free another piece, then return to the first. Discover the satisfaction of a sequence that finally fits together. FROM INTRODUCTION TO STAGE 5 The main course has 72 puzzles across six stages, with 12 in each. Every stage is available from the start. Learn the arrows and stopping points, then use several pieces to open paths and plan which exits to keep for later. UNDO. RETHINK. TRY AGAIN. There is no timer. In the main course, undo one move at a time, as often as you like, at no cost—even before you reach a dead end. When no piece can move, a dead-end message helps you pause and try another order. A LITTLE EVERY DAY Three daily picks and six weekly picks offer a fresh selection from the included collection. Play a quick puzzle or settle into a longer challenge. SMALL MOVES, SATISFYING FINISHES Soft wooden sounds accompany your moves, with animated effects when a puzzle is complete. Turn sound on or off and choose reduced motion in the settings. Play the core game offline, with no account required. Progress is saved on your device. Available in English and Japanese. Usage analytics is optional. Progress does not sync between devices.