board [4] Deep Rybka 4 Aquarium by ChessOK [5] Team The Rybka team consists of primary author and International Master Vasik Rajlich , supported by Grandmaster and evaluation expert Larry Kaufman (Rybka 3), Rybka's main tester and Women's GM (WGM) and IM Iweta Rajlich , the opening book authors Jeroen Noomen