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BP1285 First to move wins vs. first to move loses.
(edit; present; nest [left/right]; search; history)
COMMENTS

In the depicted "capture game", the objective is to capture your opponent's piece by moving to a node they are occupying. Players take turns moving their pieces. You can only move to a node that is linked to yours. All examples are "boards" where either player can force a win, depending on who moves first.


Players are assumed to be making optimal choices.

CROSSREFS

Adjacent-numbered pages:
BP1280 BP1281 BP1282 BP1283 BP1284  *  BP1286 BP1287 BP1288 BP1289 BP1290

KEYWORD

stub

CONCEPT capture_game (info | search)

AUTHOR

Leo Crabbe

BP922 One row is rearranged to make the other by swapping an odd number of object pairs vs. one row is rearranged to make the other by swapping an even number of object pairs.
(edit; present; nest [left/right]; search; history)
COMMENTS

The mathematical terms for these operations are even and odd permutations.

CROSSREFS

Adjacent-numbered pages:
BP917 BP918 BP919 BP920 BP921  *  BP923 BP924 BP925 BP926 BP927

KEYWORD

precise, allsorted, math, left-narrow, right-narrow, unorderedpair, preciseworld, left-listable

CONCEPT even_odd (info | search),
permutation (info | search)

AUTHOR

Leo Crabbe

BP1185 Smaller section tiles the grid (element-wise rotation of tiles allowed) vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP1180 BP1181 BP1182 BP1183 BP1184  *  BP1186 BP1187 BP1188 BP1189 BP1190

KEYWORD

precise, allsorted, notso, grid, miniworlds

CONCEPT element_wise_symmetry (info | search),
tiling (info | search)

AUTHOR

Leo Crabbe

BP372 Shape below fits on the left vs. shape below fits on the right.
(edit; present; nest [left/right]; search; history)
COMMENTS

See BP805 for the version of this with box-based BPs.

CROSSREFS

Adjacent-numbered pages:
BP367 BP368 BP369 BP370 BP371  *  BP373 BP374 BP375 BP376 BP377

KEYWORD

nice, dual, handed, leftright, creativeexamples, structure, traditional, rules

CONCEPT bongard_problem (info | search),
categorization (info | search),
feature_cluster (info | search),
cluster (info | search),
choice (info | search)

WORLD

bdimage_shapes_extra_below_clear_sort [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP319 The number of dots in one cluster is a multiple of the other vs. not so.
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP314 BP315 BP316 BP317 BP318  *  BP320 BP321 BP322 BP323 BP324

KEYWORD

math, unorderedpair, traditional

CONCEPT multiple_of (info | search),
number (info | search),
dot (info | search),
proportional (info | search)

WORLD

two_dot_clusters [smaller | same | bigger]

AUTHOR

Aaron David Fairbanks

BP543 Image depicting infinitely many objects vs. image depicting finitely many objects.
(edit; present; nest [left/right]; search; history)
COMMENTS

Another solution is "evokes infinity vs. not so." Or "seen as having arbitrarily fine detail." All left examples show objects getting smaller and smaller and closer and closer together approaching some limit within the box.

CROSSREFS

Adjacent-numbered pages:
BP538 BP539 BP540 BP541 BP542  *  BP544 BP545 BP546 BP547 BP548

KEYWORD

nice, abstract, concept, infinitedetail

CONCEPT finite_infinite (info | search)

AUTHOR

Aaron David Fairbanks

BP163 Line connecting small shapes does not intersect large one vs. line connecting small shapes intersects large one.
(edit; present; nest [left/right]; search; history)
CROSSREFS

See BP1015 for a re-skinned version with dots instead of shapes.

Adjacent-numbered pages:
BP158 BP159 BP160 BP161 BP162  *  BP164 BP165 BP166 BP167 BP168

KEYWORD

traditional

CONCEPT imagined_line_or_curve (info | search),
imagined_entity (info | search),
object_line_overlap (info | search),
overlap (info | search)

AUTHOR

Harry E. Foundalis

BP274 Notch from above (holds poured water) vs. no notch from above (does not hold poured water).
(edit; present; nest [left/right]; search; history)
CROSSREFS

Adjacent-numbered pages:
BP269 BP270 BP271 BP272 BP273  *  BP275 BP276 BP277 BP278 BP279

KEYWORD

notso, physics

CONCEPT concave_convex_region (info | search),
downward_upward (info | search),
line_absolute_direction (info | search),
absolute_direction (info | search),
direction (info | search),
liquid_flow (info | search),
gravity (info | search)

WORLD

arial_font_centered_connected_symbol [smaller | same | bigger]

AUTHOR

Merse E. Gáspár

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

BP121 Objects below match their "symbols" above, according to one "code" versus objects below match their "symbols" above, according to another "code."
(edit; present; nest [left/right]; search; history)
COMMENTS

Circle: VV; square: VΛ; triangle: ΛΛ ; blank: ΛV vs. circle: ΛΛ; square: ΛV; triangle: VV; blank: VΛ.

CROSSREFS

Adjacent-numbered pages:
BP116 BP117 BP118 BP119 BP120  *  BP122 BP123 BP124 BP125 BP126

KEYWORD

arbitrary, consistentsymbols, traditional

CONCEPT absence_as_presence (info | search),
correspondence (info | search),
sides_of_line (info | search),
triangle (info | search)

AUTHOR

Douglas R. Hofstadter

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