Adjacent-numbered pages:
BP520 BP521 BP522 BP523 BP524  *  BP526 BP527 BP528 BP529 BP530

stretch, boundingbox, left-null, traditional, left-couldbe

Aaron David Fairbanks

All examples are black and white images, partitioned by lines such that crossing a line switches the background color and the foreground color. (Sometimes it is not clear which is "background" and which is "foreground".) In the space between two dividing lines, there is a black and white scene; the outlines of the shapes are curves dividing black from white. Images sorted left are such that each outline-curve present in a scene that comes in contact non-tangentially with a dividing line continues across the dividing line, across which the black and white sides of it switch.

Examples (especially right) usually have ambiguity to some degree; depending on how a person reads the images, dividing lines may be confused for curves within a scene.

Adjacent-numbered pages:
BP519 BP520 BP521 BP522 BP523  *  BP525 BP526 BP527 BP528 BP529

fuzzy, unwordable, anticomputer, traditional, blackwhiteinvariant

Aaron David Fairbanks

Adjacent-numbered pages:
BP518 BP519 BP520 BP521 BP522  *  BP524 BP525 BP526 BP527 BP528

nice, precise, rotate, stretch, unstable, perfect, pixelperfect, traditional

shapes_can_touch_box [smaller | same | bigger]

Aaron David Fairbanks

Bongard Problems that break the rules or spirit of Bongard Problems but are interesting enough to keep in the database.

See BP829 and BP968 (flipped) for versions with pictures of Bongard Problems (miniproblems) instead of links to pages on the OEBP.

Adjacent-numbered pages:
BP517 BP518 BP519 BP520 BP521  *  BP523 BP524 BP525 BP526 BP527

meta (see left/right), links, keyword, right-self, sideless

bp [smaller | same | bigger]

Aaron David Fairbanks

This is the keyword "culture" on the OEBP.

Any BP that has to do with the planet Earth belongs here.

Adjacent-numbered pages:
BP516 BP517 BP518 BP519 BP520  *  BP522 BP523 BP524 BP525 BP526

meta (see left/right), links, keyword, sideless

bp [smaller | same | bigger]

Aaron David Fairbanks

Bongard Problems sorted left have the keyword "subjective" on the OEBP.

Subjective Bongard Problems are fuzzy.

Adjacent-numbered pages:
BP515 BP516 BP517 BP518 BP519  *  BP521 BP522 BP523 BP524 BP525

meta (see left/right), links, keyword, sideless

bp [smaller | same | bigger]

Aaron David Fairbanks

Left examples have the keyword "metaconcept" on the OEBP.

These are used under-the-hood by the OEBP system to display the concepts featured in a Bongard Problem; that is the main reason these pages exist.

"Metaconcept" implies sideless.

Adjacent-numbered pages:
BP514 BP515 BP516 BP517 BP518  *  BP520 BP521 BP522 BP523 BP524

This BP is a right example for itself because it does not indicate the presence of a particular concept in BP solutions.

meta (see left/right), links, keyword, metameta, right-it, feedback

linksbp [smaller | same | bigger]
zoom in left (metaconcept)

Aaron David Fairbanks

Left-sorted Bongard Problems have the keyword "keyword" on the OEBP.

Adjacent-numbered pages:
BP513 BP514 BP515 BP516 BP517  *  BP519 BP520 BP521 BP522 BP523

meta (see left/right), links, keyword, oebp, left-self, left-it, feedback, funny

bppage [smaller | same | bigger]
zoom in left (keyword)

Aaron David Fairbanks

Left-sorted BPs have the keyword "left-self" on the OEBP. Right-sorted BPs have the keyword "right-self."

These keywords are added to pages automatically.

Rhetorical questions: Where does this BP sort itself? Where does this BP sort the flipped version of itself?

See BP793 for the version sorting pictures of Bongard Problems (miniproblems) instead of links to pages on the OEBP.

See BP1075 for an example of a BP that is tagged "left-self" but would still be tagged "left-self" after the sides in the title were flipped. (This is unusual; a "left-self" BP after being flipped is typically "right-self" and vice versa.)

Adjacent-numbered pages:
BP512 BP513 BP514 BP515 BP516  *  BP518 BP519 BP520 BP521 BP522

nice, dual, meta (see left/right), links, keyword, side, metameta, feedback

Multiple options:
linksbp [smaller | same | bigger],
bp_in_own_world [smaller | same | bigger]
zoom in left | zoom in right

Aaron David Fairbanks

Left-sorted BPs have the keyword "right-finite" in the OEBP.

BPs are sorted based on how BP515 (left-finite) would sort them were they flipped; see that page for a description.

"Right-finite" implies right-narrow.

See right-listable, which is about an infinite right side that can be organized into a neverending list versus infinite right side that cannot be organized into a neverending list.

"Right-finite" BPs are typically precise.

See BP1041 for a version that sorts images of Bongard Problems (miniproblems) instead of links, and which only sorts images of Bongard Problems about numbers.

Adjacent-numbered pages:
BP511 BP512 BP513 BP514 BP515  *  BP517 BP518 BP519 BP520 BP521

notso, dual, meta (see left/right), links, keyword, side

bp [smaller | same | bigger]
zoom in right (bp_infinite_right_examples )

Aaron David Fairbanks