Solve this ‘wordoku’ in the same way as a sudoku with letters instead of numbers (the nine letters once in each row, column and nine-square cell). Once solved, one of the overall diagonals contains the jumbled surname of a UK professor of chemistry, researching in the area of organometallic compounds of the transition metals and lanthanides.

This week’s letters are: D F I M N O R T U

 

 

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