Will Shortz Presents Survival of the Fittest Sudoku

200 Hard Puzzles

Ranked #32 in Sudoku

Watch out! These puzzles are mind melting!  But if you dare, grab a pen and take on these two hundred all-new extra challenging puzzles.

Features: 200 hard puzzlesBig grids for easy solvingIntroduction by legendary puzzlemaster Will Shortz
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