内容简介
Thevastmajorityofsudokupuzzlesthatarelabeled"hard,""expert,""challenger,"arenotreallyallthatdifficult.Andinasurprisingnumberofcases,theyaredownrighteasy.Inthe"MensaAbsolutelyNastySudoku"books,youwillfindpuzzlestrulyworthyofthelable"hard."Thepuzzlesincreaseindifficultythroughoutthefourbooksintheseries.ItrangesfromthebasicandintermediatepuzzlesandtechniquesatLevelNo.1,tothemostadvancedtechniquesatLevelNo.4,alongwithpuzzlesthatrequiremultipleadvancedtechniqueseachtime.