given the position of a chess piece in algebric notation, convert it into 8 by 8 matrix format. For example,
Nb. invalid ones should be represented by nan.
Word Counting and Indexing
How long is the longest prime diagonal?
Volume difference between Ellipsoid and Sphere
Friday the 13th
The Tortoise and the Hare - 01
Abelian Sandpile - 02
Find the sequence
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