The TRIZ community has lost a valued colleague and dear friend. The Altshuller Institute as well as the TRIZ community at large mourn his passing. We will miss his sage and dedicated presentation of TRIZ to the world. His strength was in his love for teaching TRIZ to children and adults and his promotion of TRIZ to the academic community worldwide. We have placed a memorial page for Nikolai on our AI website. There you will find comments from his friends and colleagues and a collage of pictures that people have sent in.