Hi John,

How about just making your chess pieces image files floating over your
grid then you can just click and drag them where you want.

Of course considering the fact that you are emailing the worksheeet you
might need to do a bit of fiddling with object linking and embedding
to get something that works smoothly.

Another option is to lodge your worksheet on a freebie website that only
you and your competitor have access to.

Just a couple of random thoughts.
Martin