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.
Sums with Excluded Digits
Check to see if a Sudoku Puzzle is Solved
middleAsColumn: Return all but first and last element as a column vector
Spot the outlier
Find the index of the largest value in any vector X=[4,3,4,5,9,12,0,4.....5]
Ugly numbers - 03
En passant - 01
generate the matrix
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