Ah, of course, the PTA is using the PNG pieces, not the SVG, and in particular the 35x35 set. I now have added the stone there too.
As I said below, I am using this as a game simulation for Territorial Chess, a combination of Chess and Go.
OK, I see. You want to have Go-like capture. One way would be to define the move of the Stone as cU (Universal Leaper). Then you can use a stone to capture the entire chain you want to remove one by one, and finally move it back to where it came from.
Ah, of course, the PTA is using the PNG pieces, not the SVG, and in particular the 35x35 set. I now have added the stone there too.
OK, I see. You want to have Go-like capture. One way would be to define the move of the Stone as cU (Universal Leaper). Then you can use a stone to capture the entire chain you want to remove one by one, and finally move it back to where it came from.