Welcome to Helpmate Analyzer!
Helpmate Analyzer is a tool for chess composers and judges. In the Analyzer, you can specify the position and stipulation of a helpmate problem, and the program will analyze the problem and provide information on its thematic content, effects of departure / arrival of individual moves, and other features. It uses Popeye as a solving engine.
A helpmate is a type of chess problem in which both sides cooperate in order to achieve the goal of checkmating Black. Read more on Wikipedia.