Over four years ago, I came up with a puzzle type called Gravel after playing too much Mixolumia. It was never very solvable in Penpa, and the Kudamono implementation is now defunct. Which is why I'm very happy that it was finally added to pzprxs today! pzprxs.vercel.app/p?gravel/6/6...
6×6 Gravel
Solve a Gravel puzzle, size 6×6.
pzprxs.vercel.app