Diamond Chess lets you play, watch games, and chat on the Free Internet Chess Club and the Internet Chess Club.
Input with command send prefix: info, or type: commands, to have a listing of informational help files or command help files. Then input with command send prefix: help (help file name) i.e. help alias, for help on that topic. So much text will be displayed and input with command send prefix: more on ICC and next on FICS, to display more of that help file if there is more text to display. Useful help files include: help channels, help shout, help seek, help tell, help history, help examine, and help observe
Diamond Chess uses Crafty 23.4. We use it with the permission of Robert Hyatt and he retains all rights.
Diamond Chess uses Maurizio Monge's Fantasy, Spatial, and Eyes Chess Pieces with his permission(We also use Eric De Mund's adaptation of the Alpha and Merida chess pieces. "alpha" refers to Eric Bentzen's free Truetype chess font named "Alpha" and "merida" refers to Armando H. Marroquin's free Truetype chess font named "Mérida". (More info on alpha and merida see http://ixian.com/chess/#other they available under the Creative Commons Attribution-Share Alike 3.0 Unported License and used unmodified by Diamond). Update we are also using a third Eric De Mund's adaptation, the USCF pieces, also avaiable at the ixian.com/chess/#other link.
Update Feb 16 2019, I've learned the Alpha pieces by Eric Bentzen that De Mund adapted are only free for non commercial use. For commercial apps, Eric charges a fee of 50 eruos. He can be contacted at Eric at email@example.com.