I finally found time to get the file over onto some real macs (it's a bit of a pain for me right now as the only floppy drive I have is on a PC). I tried it on a Mac Plus (with System 6.0.8 ) and it loaded, but when you move a piece, the game bombs out. Same thing on an SE FDHD with system 6.0.7. I was thinking that maybe it only worked with the Mac 128/512K machine as it was probably coded in assembly and very specific to those machines(??)

And just now I re-read Mac128's post about having it working and just noticed that it was with System 2.0 and a 64K ROM. I guess the devil is in the details!

I'll have to make a System 2 disk and try it again...

edit: er, make that a System 3.2 disk for the Mac Plus. According to the specs that's the lowest OS version it can run. If that doesn't work, I'll try the System2 thing in mini Vmac like Mac128.