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March 2025 - 229th update for Online Human Reference, Tournament and GM++ Books with over 125 million positions. Latest HIARCS Human reference and GM++ books contain all the moves and stats from over the board and correspondence games up to February 2025. hiarcs.com/online-book-ac…

Mid March 2025 - Tournament CTG Book update, now 32.2 million positions, 1.8 million variations based on 1.8 million top quality games - all analysed with play recommendations. #HIARCS #Chess #Explorer #Tournament #CTG #Opening #Book #HiarcsChess hiarcs.com/chess-opening-…

May 2025 - 232nd update for Online Human Reference, Tournament and GM++ Books with over 125 million positions. Latest HIARCS Human reference and GM++ books contain all the moves and stats from over the board and correspondence games up to May 2025. hiarcs.com/online-book-ac…

Mid June 2025 - Tournament CTG Book update, now 32.6 million positions, 1.9 million variations based on 1.8 million top quality games - all analysed with play recommendations. #HIARCS #Chess #Explorer #Tournament #CTG #Opening #Book #HiarcsChess hiarcs.com/chess-opening-…

July 2025 - 234th update for Online Human Reference, Tournament and GM++ Books with over 126 million positions. Latest HIARCS Human reference and GM++ books contain all the moves and stats from over the board and correspondence games up to July 2025. hiarcs.com/online-book-ac…

The new HIARCS Human Reference & GM++ books are here: packed with the latest OTB & correspondence moves, stats, and play recommendations through Aug 2025. Subscribers get fresh theory, Jan–July 2025 top games, and full access in HIARCS Chess Explorer(Pro) hiarcs.com/online-book-ac…