E is for Explore - 9 Dots / Sam Loyd's Cyclopedia of Puzzles / 1914 Link all 9 dots using four straight lines or fewer, without lifting the pen and without tracing
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Connect All 9 Of The Dots Using 4 Straight Lines Or - 9 Dots 4 Lines - Free Transparent PNG Clipart Images Download
The nine-dot puzzle. The task consists of connecting all 9 dots with... | Download Scientific Diagram
![7: Nine dots puzzle: draw four straight lines that go through all nine... | Download Scientific Diagram 7: Nine dots puzzle: draw four straight lines that go through all nine... | Download Scientific Diagram](https://www.researchgate.net/publication/277007765/figure/fig24/AS:669526043660305@1536638856355/Nine-dots-puzzle-draw-four-straight-lines-that-go-through-all-nine-dots-but-without.png)