All examples here fit left in BP809, a version where the figures are allowed to pass through themselves while being deformed.

Figures can be transformed into one another by smooth stretching (intersection points stay constant; paths connecting those points remain), while remaining within the 2d box vs. movement out of the plane required.

Figures can be transformed into one another by smooth stretching (intersection points stay constant; paths connecting those points remain), while remaining within the box vs. movement out of the plane required.

Figures can be transformed into one another by smooth stretching (intersection points stay constant; paths connecting those points remain), while remaining within the box versus movement out of the plane required.

Aaron David Fairbanks

This is a very specific parsing of the world. It is likely the world would instead be parsed as BP805. BP pages listing this as their world should list that world also as an alternative option.

Bongard Problems with "world" one figure, same as described in BP805, that is oblong in an axis-aligned direction vs. other Bongard Problems.

Aaron David Fairbanks