Assertion: chessboard's corner | /r/HasProperty | removed
Facets:
value: from the board
type: OTHER
Source sentences:
text: If the two white corners are removed from the board then 30 white squares and 32 black squares remain to be covered by dominoes, so this is impossible.
text: If the two black corners are removed instead, then 32 white squares and 30 black squares remain, so it is again impossible.