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 chemistry Nobel laureate. What is his name, and which other Nobel prize winner attended the same small English secondary school?

This week’s letters are: B F I K L N O S W

 

 

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