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$\begingroup$ The question specifies $8 \times 8$, not $4 \times 4$. $\endgroup$
– RobPratt
Commented Mar 10, 2023 at 0:59
3

$\begingroup$ @RobPratt yes, but the same argument is going to hold if the grid is expanded downward and leftward. $\endgroup$
– ApexPolenta
Commented Mar 10, 2023 at 1:09
$\begingroup$ I agree, but the statement that A cannot be covered is false. Note that I'm assuming that Z can be both rotated and flipped. $\endgroup$
– RobPratt
Commented Mar 10, 2023 at 1:10
3

$\begingroup$ @RobPratt see edit, pretty sure the answer doesn't change. $\endgroup$
– ApexPolenta
Commented Mar 10, 2023 at 1:22
3

$\begingroup$ Looks better now. $\endgroup$
– RobPratt
Commented Mar 10, 2023 at 2:00

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