The Opening Encyclopaedia 2023 impresses with a huge scope and is the largest collection on opening theory with almost 1400 theory articles and 7,444 opening surveys. In 70 videos with a total running time of 29 hours the latest trends are presented by grandmasters. Vojko Mencinger has taken a look at the work, which is available at a special price this week in the Summer Special bundle with ChessBase 17.