🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPolskiPortuguêsTürkçeРусскийالعربيةفارسی한국어中文日本語EntityQ2635526· pop 20· linked from 14 articlesmoving sofa problemAlso known as sofa problemmathematical problem about moving the largest possible shape around a 90° cornerAvailable in 19 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةCatalanConnectionsQ118398Entitylist of unsolved problems in mathematicsEntityCategories1966 introductionsCouchesDiscrete geometryRecreational mathematicsUnsolved problems in geometry