Train Track Logic Puzzle

This is a train tracks puzzle: a grid, a few numbers on its edges, and one railway line to find. Lay it from the entry on the left edge to the exit on the bottom edge. The numbers above the columns and beside the rows tell you how many cells hold a rail. Straight rails and quarter-turn curves only, and the line never splits or crosses itself. TWO TRACK TYPES • Open: one line from the entry to the exit. • Closed: one single loop with no end. 800 GRIDS, FOUR LEVELS • Easy 6×6, Medium 8×8, Hard 8×8 and Expert 10×10. • 100 grids per level for each track type. PLAY AT YOUR PACE • Drag from cell to cell to lay a rail, drag again to lift it, tap a cell to cross it out. • A hint lays one right piece of track. You get three per grid; after that, a short video you choose to watch gives you another. • Check shows misplaced rails in red. • Undo and clear whenever you like. • A timer and your best time for every level. • Your progress stays on your device. CALM BY DESIGN • A paper-and-ink look, in light or dark theme. • Gentle haptics, which you can turn off. • Works offline, no account needed. Free with ads: a short ad can appear between two grids, never in the middle of one. • In 11 languages. Solve a grid and a little train runs the line you laid.