. . .
Bongard Problems sorted left have the keyword "dithering" on the OEBP.
Bongard's original Problems never involved shades of gray. They were just black and white drawings.
Adjacent-numbered pages: BP1193 BP1194 BP1195 BP1196 BP1197  *  BP1199 BP1200 BP1201 BP1202 BP1203
meta (see left/right), links, keyword
Aaron David Fairbanks