ChessVista’s official copyright notice:

"All rights reserved. All rights reserved. No material published on this Website may be copied, reproduced, modified, republished, uploaded, posted, transmitted, or distributed, in whole or in part or by any form or means, without prior written permission from ChessVista / Frits Agterdenbos. The use of material from this Website on any other Website or networked computer environment or for any other purpose is strictly prohibited and such unauthorized use may violate copyright, trademark, and other similar laws."