The On-Line Encyclopedia of Bongard Problems

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There is a way of grouping elements into (more than one) equal-sized blocks such that no block appears twice vs. there exists no such grouping.

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	COMMENTS	`Sequences with a prime number of elements are sorted left when all their elements are unique, and sorted right otherwise.`
	CROSSREFS	`Adjacent-numbered pages: BP1270 BP1271 BP1272 BP1273 BP1274 * BP1276 BP1277 BP1278 BP1279 BP1280`
	EXAMPLE	`The sequence ABBABB would be sorted left, as it could be grouped into (AB)(BA)(BB), where each block is unique.`
	KEYWORD	`precise, unwordable, notso, sequence, miniworlds`
	CONCEPT	`element_grouping (info \| search)`
	AUTHOR	`Leo Crabbe`

BP1278

There is a way of dividing the grid into (more than one) equal-sized blocks such that no block appears more than once vs. there exists no such way of dividing the grid.

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CROSSREFS

2D version of BP1275.

Adjacent-numbered pages: BP1273 BP1274 BP1275 BP1276 BP1277 * BP1279 BP1280 BP1281 BP1282 BP1283

KEYWORD

precise, traditional, grid

AUTHOR

Leo Crabbe

BP1279

Circled points are all possible vertices a square with a particular side length can take, provided that each of its corners lie on a grid point vs. not so.

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	COMMENTS	`Rotation of the square is allowed.`
	CROSSREFS	`See BP1280 for version with hexagons on a hexagonal grid.` `Adjacent-numbered pages: BP1274 BP1275 BP1276 BP1277 BP1278 * BP1280 BP1281 BP1282 BP1283 BP1284`
	KEYWORD	`hard, precise, allsorted, unwordable, hardsort, left-finite, right-finite, left-full, fixedgrid, preciseworld`
	CONCEPT	`square (info \| search)`
	AUTHOR	`Leo Crabbe`

BP1280

Circled points are all possible vertices a regular hexagon with a particular side length can take, provided that each of its corners lie on a grid point vs. not so.

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CROSSREFS

See BP1279 for version with squares on a square grid.

Adjacent-numbered pages: BP1275 BP1276 BP1277 BP1278 BP1279 * BP1281 BP1282 BP1283 BP1284 BP1285

KEYWORD

hard, precise, allsorted, unwordable, hardsort, left-finite, right-finite, preciseworld

AUTHOR

Leo Crabbe

BP1286

One frame rate vs. another.

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	COMMENTS	`In particular, 40fps vs. 20fps.`
	CROSSREFS	`Adjacent-numbered pages: BP1281 BP1282 BP1283 BP1284 BP1285 * BP1287 BP1288 BP1289 BP1290`
	KEYWORD	`stub, precise, arbitrary, antihuman, animated, contributepairs, right-couldbe, preciseworld`
	AUTHOR	`Leo Crabbe`

BP1290

Red and its derivative hues vs. not

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	COMMENTS	`Solution worded differently:` `Colors that use the primary color red to make, vs colors that don’t/cannot` `Reds and its secondary and tertiary relations vs. not` `Red and its pigment relatives vs. not` `Comment from the author (a.k.a. Morgan Kidd):` `Thank you Sally D. for introducing me to bongards!`
	CROSSREFS	`Adjacent-numbered pages: BP1285 BP1286 BP1287 BP1288 BP1289 *`
	KEYWORD	`precise, notso, color`
	AUTHOR	`Morgan`

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