Slitherlink
Draw one closed loop around a small clue grid.
Preparing the activity…
How to play
Each number gives the number of selected edges around that cell. Every used vertex must have two edges. All selected edges must form one loop without branches or separate loops.
Use the feedback
Attempt an answer before looking at a hint or explanation. If it differs from the expected answer, compare the reasoning one step at a time. For a number problem, substitute your result back into the question. For a passage, point to the words that support your interpretation.
About this activity
These compact puzzles are practice activities, with a deliberately small board or sequence. They are not a complete catalogue of tournament puzzles. There is no timer or competitive ranking. Correct-answer counts describe this task only.
Some puzzles can have more than one valid solution; grid checks accept any solution that meets the displayed constraints. Hints follow a known example solution. Familiarity, hints and previous attempts affect performance.
Keep exploring
Explore the original brain games · Learning guides
Original examples and code created with AI assistance. No IQ, diagnostic or therapeutic interpretation is provided.