I love the concept. I was left wanting more because larger puzzles are apparently not more difficult, they just seem to have a lot of solutions. But can we make them more difficult? Just in case anyone else wants more of a challenge... I hand-wrote a 10x10 that should be harder to crack:<p><pre><code> 1 2 1 2 2 3 1 1 2 2
3 2 3 3 3 3 3 3 3 3
3 3 3 3 3 3 3 3 3 3
2 1 2 2 3 2 1 1 3 1
2 1 3 3 1 3 3 1 3 1
3 3 1 3 3 3 3 3 3 3
2 3 2 2 2 2 1 2 2 3
3 3 3 3 1 3 3 1 3 2
1 3 2 3 3 3 3 3 3 3
2 1 3 3 2 2 2 2 1 F
</code></pre>
Unless I made a mistake, the simplest solution is not easy to find. Obviously I was thinking about an algorithm to create harder "Jumping Julia" puzzles. Definitely doable, but for now I'll leave it at that!