Wednesday's Marginal Remarks pictured Robert De Niro
and Sean Penn in "We're No Angels." De Niro appeared
again in a Saturday Night Live sketch linked to
in last night's 9:29 post.
Here are some remarks featuring Penn related to
Peter J. Cameron's description yesterday of Sudoku
as an example of mathematics.
(Recall that the symbol #, known as 'hash,"
can stand for checkmate.)
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"Chess problems are the hymn-tunes of mathematics."
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For a sample chess problem, see a post from Oct. 10, 2005,
the day that the Sudoku remark Cameron describes was
in the news.
