olymmath

BALTIC-WAY 1998 Problem 16

    Is it possible to cover a 13×1313 \times 13 chessboard with forty-two tiles of size 4×14 \times 1 so that only the central square of the chessboard remains uncovered? (It is assumed that each tile covers exactly four squares of the chessboard, and the tiles do not overlap.)

    Dataset text NuminaMath olympiads. Quoted with source.

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