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BP1215 Axis of symmetry along the NW/SE diagonal vs. not.
(edit; present; nest [left/right]; search; history)
CROSSREFS

BP1206 is the same solution but with the vertical axis instead of the NW/SE diagonal.

BP1207 is the same solution but with the horizontal axis instead of the NW/SE diagonal.

Adjacent-numbered pages:
BP1210 BP1211 BP1212 BP1213 BP1214  *  BP1216 BP1217 BP1218 BP1219 BP1220

KEYWORD

stub, notso, handed, leftright, updown, rotate, left-narrow, traditional

CONCEPT diagonal (info | search),
symmetry_axis (info | search),
symmetry (info | search)

AUTHOR

Aaron David Fairbanks

BP1216 Arrow pointing north-west vs. arrow pointing south-east.
(edit; present; nest [left/right]; search; history)
CROSSREFS

BP1218 is "arrow pointing north-west vs. arrow pointing elsewhere".

Adjacent-numbered pages:
BP1211 BP1212 BP1213 BP1214 BP1215  *  BP1217 BP1218 BP1219 BP1220 BP1221

KEYWORD

stub, precise, dual, handed, leftright, updown, rotate, left-narrow, right-narrow, traditional

CONCEPT diagonal (info | search)

AUTHOR

Aaron David Fairbanks

BP1217 Bottom shape is bigger than top shape vs. top shape is bigger than bottom shape.
(edit; present; nest [left/right]; search; history)
CROSSREFS

BP1214 has the same solution but rotated a quarter-turn clockwise.

Adjacent-numbered pages:
BP1212 BP1213 BP1214 BP1215 BP1216  *  BP1218 BP1219 BP1220 BP1221 BP1222

KEYWORD

stub, dual, handed, updown, traditional

CONCEPT size (info | search),
quantity_comparison (info | search)

AUTHOR

Aaron David Fairbanks

BP1218 Arrow pointing north-west vs. arrow pointing elsewhere.
(edit; present; nest [left/right]; search; history)
CROSSREFS

BP1216 is "arrow pointing north-west vs. arrow pointing south-east".

Adjacent-numbered pages:
BP1213 BP1214 BP1215 BP1216 BP1217  *  BP1219 BP1220 BP1221 BP1222 BP1223

KEYWORD

stub, precise, allsorted, notso, handed, leftright, updown, rotate, left-narrow, traditional

CONCEPT diagonal (info | search)

AUTHOR

Aaron David Fairbanks

BP1220 Square outline vs. anything else.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP1215 BP1216 BP1217 BP1218 BP1219  *  BP1221 BP1222 BP1223 BP1224 BP1225

KEYWORD

stub, notso, left-narrow, left-finite, left-full, right-null, stableworld

CONCEPT square (info | search)

AUTHOR

Aaron David Fairbanks

BP1221 Square present vs. no square present.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Nearly identical to BP1209, which is the same except the square is always empty (and the right side still has no squares, empty or not).

Adjacent-numbered pages:
BP1216 BP1217 BP1218 BP1219 BP1220  *  BP1222 BP1223 BP1224 BP1225 BP1226

KEYWORD

stub

CONCEPT existence (info | search),
square (info | search)

AUTHOR

Aaron David Fairbanks

BP1222 Same shape up to resizing vs. different shapes.
(edit; present; nest [left/right]; search; history)
CROSSREFS

BP57 instead requires the shapes are identical, even in size.

Adjacent-numbered pages:
BP1217 BP1218 BP1219 BP1220 BP1221  *  BP1223 BP1224 BP1225 BP1226 BP1227

KEYWORD

stub, precise, allsorted, traditional

CONCEPT size (info | search),
same_shape (info | search),
same (info | search)

AUTHOR

Aaron David Fairbanks

BP1223 Center square is black vs. center square is white.
(edit; present; nest [left/right]; search; history)
COMMENTS

All examples are a three by three grid of black or white squares.

CROSSREFS

Adjacent-numbered pages:
BP1218 BP1219 BP1220 BP1221 BP1222  *  BP1224 BP1225 BP1226 BP1227 BP1228

KEYWORD

stub, left-finite, right-finite, traditional, finishedexamples, fixedgrid, preciseworld

CONCEPT outlined_filled (info | search),
center (info | search)

AUTHOR

Aaron David Fairbanks

BP1224 Grey shape present vs. not.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP1219 BP1220 BP1221 BP1222 BP1223  *  BP1225 BP1226 BP1227 BP1228 BP1229

KEYWORD

stub, notso, dithering

CONCEPT existence (info | search),
texture (info | search)

AUTHOR

Aaron David Fairbanks

BP1226 Three identical elements vs. other number of identical elements.
(edit; present; nest [left/right]; search; history)
COMMENTS

Based on BP91, which is the same, except for that the right side is "four identical elements".

CROSSREFS

Adjacent-numbered pages:
BP1221 BP1222 BP1223 BP1224 BP1225  *  BP1227 BP1228 BP1229 BP1230 BP1231

KEYWORD

stub, arbitrary, number, traditional

CONCEPT number (info | search),
three (info | search)

AUTHOR

Aaron David Fairbanks

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