Koltanowski began his tour with a large chalkboard divided by lines into a grid eight squares by eight. As he solved problems on a large demonstration board, audience members were encouraged to come onstage to enter words and numbers into the squares. By the time all 64 squares were filled, it was common to see street and city names, names of months or days of the week, names of famous chess players, names of audience members, names of movie stars or TV personalities, telephone numbers and addresses, birth dates, serial numbers from bank notes, etc.