This application is to edit, analyze and review Tsumego or life-and-death problem of Go(Weiqi,Baduk,Igo). Black should enclose white (Black first white dead or White first white alive). Target area to be analyzed should be divided by black clearly. Removable black should be gray.Attention: If problem figure is large, analyzing may take long time, it may result lack of memory or response of button may be slow. Analyzing may end abnormally. Analyzing result may be incorrect.Key word: 바둑,囲碁,圍碁,life and death problems,sihuoti,사활문제,詰碁,死活,Gorota