sys/games/lib/sudoku/boards/hard-2005-03-26.su


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..8..457.
.........
.1..726.3
.....8.1.
.62.1.84.
.8.5.....
5.169..3.
.........
.498..7..
238164579
796385124
415972683
957248316
362719845
184536297
521697438
873451962
649823751