Dry erase blocks

[donkirkby]

In order to use the same blocks on more than two puzzles, leave one side blank and include a dry erase marker, along with a booklet of more puzzles that you can copy onto the blank blocks. The other side could be filled in normally as a pair of starter puzzles.

Universal blocks: if I included two sheets and packed carefully, you could probably make all the puzzles on the web site.

I think the front is supposed to be dry erasable, but not technically the back, although they both work reasonably well.

Suits would probably work better in the corners, since you can't really shade with a dry erase marker.

Probably put an 11x11 and 13x13 on the non-blank side, since some solvers won't ever tackle the big 15x15.