#366 Overview of bugs on Windows11_version of code 01.03.2026

[John Dohn]

Hello! I just want to make a general overview of new and old bugs I noticed on WINDOWS 11 (I first tried the most recent precompiled version from 29.01.2026, then compiled the program in the beginning of March, so let's consider 01.03.2026 the date of the code I used)
BUG 1: LICHESS MASTERS DATABASE DOESN'T LOAD AT ALL Of course, I know LICHESS started demanding login credentials to use their database, I tried different API's, even tried one with granting full access to my account. However, nothing works. It's probably the greatest problem of the new version, as LICHESS MASTERS database is super fast and versatile.
BUG 2:CTG TREES DO LOAD, BUT DATA IS PARTIAL I uploaded two sample screenshots here to explain the problem. Just the initial position, same database used. One screenshot is from CHESSBASE and another one is from CHESSX. As you can see CHESSX has no 1.e4 1.d4 and 1.c4 moves mentioned at all. What's paradoxical when you make 1.e4 on the board it shows some moves for Black, but some moves are still missed. What's important, missing moves are of random kind - some moves played in thousands of games are missed, some very rare moves are missed as well.
BUG 3:NOT RECOGNIZING CHANGES MADE IN OTHER PROGRAMS This one is not critical, but it seems CHESSX recognizes only changes it made to PGN file on its own. For instance, I needed to make some changes to pgn. file in NOTEPAD just after modifying the file in CHESSX. I closed file in CHESSX, modified some things in NOTEPAD. When I went back to CHESSX and reopened the pgn. file it was showing the old version. OK, this one is a very specific problem, not that important probably, but still.
BUG 4:DOUBLING OF MOVES AND CRASHING AFTERWARDS(PERSISTED IN OLD VERSIONS AS WELL) Quite an annoying bug, which one persists in all recent versions of CHESSX. For instance, I analyze some game, add lots of lines to it and then want to make an excerpt from the game, for instance just from move 25. When all moves till move 25 are deleted, the move order becomes doubled. Move 25 is showed like move 50. If I try to strip even one single move after that bug - program crashes.
Hope to hear from developers! Thanks again for a nice program I truly like!

[Jens Nissen]

Please do not post multiple issues within one report as this makes tracking errors impossible (if I fix one issue and the other is open, I close the report thus the still open issue is lost as item to fix).
Second thing: please always try to give a sample database: things that might be obvious to reproduce for you might not be for me - like the Windows Open file issue (Bug #361) that took me nearly a year to understand - fixing was a matter of minutes afterwards.
Now coming to the issues:
1) The lichess master database is not a database at all, it's an opening tree which is internally handled as database - I should have probably make it hidden from the list of databases. When I implemented it, I thought of having the 15 most important games from the opening tree browser as games inside the database and perhaps, I will implement this in 1.7.2
2) I need a sample ctg to explore
3) Again - post a sample that does not work as expected. If ChessX does not see changes made to a database, then either the file was blocked from writing so the content is not inside or the manually edited file is not legal PGN anymore and thus not loaded completely.
4) I can see this one indeed. That used to work so I need to backtrack when this broke.

[John Dohn]

My apologies for bulking the questions, I haven't realized that was wrong.
Some updates on my issues:
1) I have read your explanation about lichess tree, but may I ask you to give some tips on how to use it as it used to be in older versions. As I told you, it doesn't load even with APIs
2) It seems it was my mistake. My ctg. tree was generated in ChessBaseReader and it seems to have some limitations. When I downloaded sample ctg. from web it worked well, so it was a mistake on my side
3) Most likely on my side as well
4) You noticed the problem as well, so it's just a matter of time

So, in a nutshell, it's only about LICHESS TREE not working. If you have some ideas what can be done with that, I'll be happy to hear from you
Best regards