I have ChessBase 12 64Bit. To create an Opening Tree I do the following steps:
- I click on "Mega Database 2014".
- I filter all the 5.8 millions games like I want (for example, taking only the games where a specific player was White).
- Right click > Edit > Select all.
- Right click > Edit > Clip or unclip.
- File > New > Database > Save as type: Books (*.CTG)
- And then I drag the "Clip Database" to my newly created Opening Tree.
- The newly created Opening Tree works fine.
But there is just one problem: all the games always stop near move 26 (sometimes at move 23, sometimes at move 29).
Why is that? And how can I fix this?
Both of the current answers are completely incorrect.
I had the confirmation from two other independant people that their opening trees in their ChessBase do not stop after a certain number of moves!
They both told me that in order to make an opening tree that doesn't stop after a certain number of moves, we simply had to select "Absolute Length" and then input a big number (100 will work) for the "Length".
See page n°103 of this manual: http://download.chessbase.com/download/pdf/ManualFritz13.pdf
But that's what I have always done, and it doesn't work.
I have tried to input various numbers for the "Length": 5, 10, 15, 20, 30, 40, 50, 100, 200, 400. And surprisingly, no matter what number I put, the opening tree always stop near move 26!
I also tried to pick "ECO-Relative Length" instead of "Absolute Length", and weirdly there was absolutely no difference: the opening tree still stops near move 26.
This means that there really is a big problem, a bug. ChessBase is simply ignoring whether I choose "Absolute Length" or "ECO-Relative Length" and what number I put for the "Length"...