The Hoppers Diagram also crashed for me, but the problem turned out to be in the Lame Squirrel, in particular its nA and snD moves for the black one. At some point I made the Diagram automatically swap left and right for black pieces if symmetry=mirror applied. (Before this was only done for castlings, which in non-Japanese variants are usually the only moves with left-right asymmetry.) The direction of scanning the path between origin and destination for obstacles was not likewise flipped, though, so that the scan would never reach the destination square, and crash the program by getting into an infinite loop or wandering off board.
I now fixed that, but your CwDA collection page used betzaNew.js?nocache=31, which refers to a fixed, now old version of betzaNew.js floating somewhere in the cloud. We had to resort to that trick when nocache=true wasn't working, and would at the time deliver still older versions. But now Fergus fixed that, so by changing back to that and refreshing the browser cache will always get you the latest version.
The Hoppers Diagram also crashed for me, but the problem turned out to be in the Lame Squirrel, in particular its nA and snD moves for the black one. At some point I made the Diagram automatically swap left and right for black pieces if symmetry=mirror applied. (Before this was only done for castlings, which in non-Japanese variants are usually the only moves with left-right asymmetry.) The direction of scanning the path between origin and destination for obstacles was not likewise flipped, though, so that the scan would never reach the destination square, and crash the program by getting into an infinite loop or wandering off board.
I now fixed that, but your CwDA collection page used betzaNew.js?nocache=31, which refers to a fixed, now old version of betzaNew.js floating somewhere in the cloud. We had to resort to that trick when nocache=true wasn't working, and would at the time deliver still older versions. But now Fergus fixed that, so by changing back to that and refreshing the browser cache will always get you the latest version.