Sudoku: Difference between revisions

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m (→‎{{header|F_Sharp|F#}}: Tidied up indexing indentation)
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=== "Smart" Recursive Backtrack Solution===
<!-- By Martin Freedman, 20/11/2021 -->
Still needs profiling/hot path tuning:
<lang csharp>using System.Linq;
using static System.Linq.Enumerable;