Opening book Hell for use in chess GUIs with .ctg files support. Book was created by derivation of top class games from ICCF server (International Corespondence Chess Federation server). All games are evaluated by top engines like Stockfish, Komodo and Houdini for hours and days with ideas from real human GMs handling them.

Recommended

• default settings - 2/30
• for any engine vs. engine competition
• for any chess match with engines use allowed

Do not use for testing engines!