EntityQ388260· pop 6· linked from 20 articlesexact coverSign in to savedisjoint family of sets, drawn from a larger collection, with the same union as the whole collectionConnectionsmathematicsEntityEight queens puzzleEntitypentominoEntitychessEntitycomputer scienceEntityInternational Standard Book NumberEntityalgorithmEntityfunctionEntitysetEntitydigital object identifierEntityInternational Standard Serial NumberEntitysudokuEntityDonald KnuthEntityqueenEntitycombinatoricsEntitycloud computingEntityrotationEntityempty setEntitysubsetEntitypermutationEntityCategoriesNP-complete problemsTheoretical computer science