Hi Lance and all,
Testing Thinker on various positions I have found that solution times of version 4.6c and 4.7a are equal but search depth is 1 bigger wit 4.7a. What is the reason of this?
BTW, I suggest to split the download files into two parts, one to contain only the book, the other the rest. This way the book will not have to be downloaded all the time a new version is released.
G?bor