本ほん碁ごMeanings1noungo (board game)rare termRare term for the board game Go; the standard word is 碁 (ご). This form may appear in older or specialized contexts.See also: 碁古ふるい文ぶん献けんでは「本ほん碁ご」という表ひょう記きが見みられることがある。In old documents, the notation 本碁 can sometimes be seen.