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Quadrata

A Latin Square Puzzle Blog

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Showing posts from 2026

August 06, 2026

Avoidant Kings

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David Nacin: David Nacin is a professor at William Paterson University and author of the books Math-Infused Sudoku and The Group Theory Puzzle Book. He enjoys designing and studying puzzles that involve partition identities, the motion of chess pieces, finite groups, and other mathematical structures.

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