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Nick Berry died in October 2022. His DataGenetics inbox is still read, by Ian Mercer, who maintains this archive.

If you have a question about the site or one of Nick's articles, or a memory of Nick you'd like to share, you can write to:

nick at datagenetics dot com

Replies may take a while. Please understand that new questions about the puzzles may not get an answer the way they would have from Nick.