[R-pkgs] [R] sudoku

[Brahm, David]

sudoku_2.0 is now available on CRAN and mirrors.

Thanks to some terrific contributions and suggestions, especially by
new co-author Greg Snow, this version has a full GUI interface (native
on Windows, or using "tkrplot"), a puzzle generator, and a function to
fetch recently published puzzles.  The GUI (playSudoku) can act as an
editor to input a puzzle, then give you hints, correct errors, reveal
cells, or show the full solution.

See README for some work remaining to be done, including a uniqueness
test, "notes" in the GUI, and a scoring mechanism. 

-- David Brahm (brahm at alum.mit.edu)