An image of this Bongard Problem fits on the left side.
See BP867 for a similar BP that sorts links to pages on the OEBP instead of images of Bongard Problems.
Adjacent-numbered pages: BP996 BP997 BP998 BP999 BP1000  *  BP1002 BP1003 BP1004 BP1005 BP1006
stub, notso, meta (see left/right), miniproblems, funny
Aaron David Fairbanks
See BP1061 for a version of this with only squares and which allows infinite nesting.
See BP71 for a Problem about counting levels of nesting.
Adjacent-numbered pages: BP1017 BP1018 BP1019 BP1020 BP1021  *  BP1023 BP1024 BP1025 BP1026 BP1027
easy, nice, precise, allsorted, traditional
varied_thickness_curves_drawing [smaller | same | bigger]
See BP919 for the version with links to pages on the OEBP instead of images of Bongard Problems.
Adjacent-numbered pages: BP1078 BP1079 BP1080 BP1081 BP1082  *  BP1084 BP1085 BP1086 BP1087 BP1088
teach, meta (see left/right), miniproblems, presentationinvariant
boxes_bpimage [smaller | same | bigger]
Leo Crabbe
BP1206 is the same solution but using the vertical axis instead of the horizontal axis.
BP1215 is the same solution but with the NW/SE diagonal instead of the vertical axis.
Adjacent-numbered pages: BP1202 BP1203 BP1204 BP1205 BP1206  *  BP1208 BP1209 BP1210 BP1211 BP1212
stub, notso, stretch, left-narrow, traditional