Draw - one-stroke puzzle game

A brain training block puzzle game, featuring Königsberg Bridge puzzle solving skills to improve cognitive abilities.<br>This is a completely free, Königsberg Bridge puzzle solving game that is simple, yet engaging and will have you hooked.<br>Enjoy all 3,200 stages to your heart's content.<p><br><b>Summary</b><br>This is a high quality brain training puzzle game which will stimulate your brain each time you play.<br>Enjoy challenging and energizing your brain during your free time, while commuting or before going to sleep.</p>
<p><br><b>How to play</b><br>The rules are remarkably simple.<br>Color in all the onscreen blocks with one continuous stroke.</p>
<p>Use the available hints to figure out puzzles that are difficult and hard to solve.<br>These hints are available for free, of course.</p>
<p><br><b>Stages</b><br>4 difficulty levels available, from Beginner, Expert, Professional, to Master.<br>An unprecedented number of puzzles, 3,200, are available to play.<br>Master mode is truly an <b>"extremely difficult level..."</b></p>
<p><br><b>The origins of the Königsberg Bridge</b><br>The Königsberg Bridge puzzle originated as a mathematical problem set on the Pregel River in the city of Königsberg in the early 18th century.<br>This mathematical problem involved "starting from any point in the city, and setting out to cross each of the 7 bridges spanning the Pregel River once and only once, and returning to the original starting point."</p>
<p><br><b>Having a mathematically stimulated brain is said to have effects which can lead to prevention of degenerative aging and boost work efficiency.<br>We hope you will take this opportunity to challenge yourself and "enjoy this completely free brain training game that you can play in your free time."<br>We are certain that you'll be hooked.</b></p>