Make one loop
Draw lines between dots to make one closed loop.
Example
Example
Try an example · 1 of 2
What does the 2 mean?
Draw exactly two of this square’s four sides. Any two sides work for this first step.
0 of 2 sides drawn. Tap two sides of the square.
Tap a dotted side to draw a line. Tap the line again to remove it.
3 × 3 cells. Start with a zero, then follow the clues.
An original puzzle with a checked solution.
One puzzle · Untimed · Hints available
One answer, reached by reasoning alone. No guessing.
Clear this puzzle and start it again?
Puzzle complete
Explore the method
Learn the two counts behind Make one loop, the sides around each number and the lines at each dot, and why a loop that closes early is wrong.
On by default unless you turn it off. Saved choices are kept. Shares starts, completions, replays and error categories. For ChatGPT visits, starts and completions may include the first QuickenBrain page and country. No answers, drawings or names.
How this data is usedHelp
- Join neighboring dots with horizontal or vertical lines to make one closed loop.
- Each number tells you exactly how many of its four sides need lines. Blank cells have no number to satisfy.
- The loop cannot cross or branch. Every dot it visits has exactly two lines, and separate loops do not count.
A useful deduction explains why a choice is forced. Check both the nearby clue and how the choice affects the whole loop.
About this practice
Draw lines between dots to make one closed loop. Each number tells you how many sides of its square need a line.
Learn a method
Two lines or noneReport a problem
On by default unless you turn it off. Saved choices are kept. Shares starts, completions, replays and error categories. For ChatGPT visits, starts and completions may include the first QuickenBrain page and country. No answers, drawings or names.
How this data is used