Free online logic puzzles

Logic puzzles you can solve with clear thinking and no guessing. Place dogs so no two touch in Sniffdoku, a sudoku with pictures instead of numbers. Draw every picture in one stroke in Trace Once. Slide arrows off the board in the right order in Right Away and its 3D cube, Right Away Cube. Or untangle ropes and snakes in Untie Me and Snake Pit.

Every game starts with small, gentle boards and builds up to real brain teasers. They all run in your browser on a phone, tablet or computer, with nothing to install, and your progress is saved in that browser.