>I do agree that the whole thing about opening book seems a bit overblown to me: obviously getting rid of castling means you have to mostly throw out the curren

>I do agree that the whole thing about opening book seems a bit overblown to me: obviously getting rid of castling means you have to mostly throw out the current "book"; but surely a new one will be written. That's what I thought too. Kramnik said "For example, the openings seem to be more complicated in the AlphaZero no-castling games," Assuming it is more complicated, I wonder what that means in terms of the number of openings someone will have to learn? I'm going to take a wild guess and say there will be more than standard chess. If it takes off, I guess time will tell what effect it has on the game after everyone memorises the main lines and variations.