How to play
Lead the fox on one trail that fills every square. Start on 1, pass through the numbers in order, and finish on the biggest one. The trail moves up, down, left and right, never crosses itself, and can't go through the thick walls. Drag to draw; drag back, or tap the trail, to take it back.
Three new puzzles every day at midnight wherever you are: small, medium and large. Each has exactly one answer. I wrote a solver that counts the answers, removed numbers until any further removal would allow a second answer, and then checked every puzzle again with a second solver written separately. "Another one" gives you a random puzzle from the same collection for practice.
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