As before, I didn't include the puzzle database in the release files, please download it from the lichess site: https://database.lichess.org/lichess_db_puzzle.csv.bz2, extract the ".csv" file and put it in the "puzzles" directory.

The opengl version inside the zip files is what I had previously called windows 7 version, it's for systems that don't have Vulkan or DirectX 12, the pieces look worse because we have to use a regular font to display them (instead of images), but other than that, the functionality is the same.

The number of puzzles classified by opening is still not very big, you can take a look at the lichess page to have an idea of how many are there. In this app the filter is just by opening family, not subvariations.

The Linux binaries I'm providing here were tested in Linux Mint 20.1 and Arch Linux. I don't know if they will work in other systems but the compilation is pretty straightforward in case you have to compile it yourself.

Changes:

• Fixed compatibility with the current lichess db (with the old version, some puzzles would be ignored due to the introduction of a couple opening fields in the database)
• Added a filter by opening (including the side to play)
• Added an option to not automatically load the next puzzle
• Added a button to redo the puzzle
• Added a takeback button in the analysis mode

Minor changes:

• Now it's visually clear which is the piece selected for promotion
• The puzzle link is shown and is selectable (previously we were just displaying the puzzle ID)
• Added the Gothic A1 font for the pieces in the opengl version, alongside the GNU Freefont that we had used before

Known issues:

• In old Windows versions (7/8), you may have to install the vcruntime140 dll (in this case there will be an error message complaining about it's absence), this dll can be obtained from Microsoft's website.

Important:

I won't be including the puzzle database in the release files anymore, please download it from the lichess site: https://database.lichess.org/lichess_db_puzzle.csv.bz2, extract the ".csv" file and put it in the "puzzles" directory.

This way requires you a bit of manual work but on the other hand it makes sure the file is updated and you won't need to download again if you already have it.

Changes:

• Horizontal layout with tabs
• Puzzle information is displayed (game link, fen, rating, themes, etc.)
• Sound for moves (can be turned off)
• Basic analysis mode (let you freely move the pieces)
• Hint (highlight the piece that should be moved)
• Different piece and board themes
• Includes also 32-bit versions for Windows

Windows:

The "windows7" and "windows10" in the name in kind of an approximation:

• The version for windows 7 should also work in 8 / 8.1 and is for systems that don't have Vulkan or DirectX 12. The pieces look considerably worse and you can't change them but other than that the functionality is the same.
• The Windows 10 version should be preferred if it works in your system, since it looks way better.

Linux:

The binary file I'm providing here was compiled in Linux Mint and tested there and in Arch Linux. I don't know if it will work in other systems but the compilation is pretty straightforward in case you have to compile it yourself.

General changes/fixes:

• Highlight last move (very useful to see if en passant is allowed).
• Added a config file (settings.json) to change board size, puzzle db location, piece theme (name the images the same way as the merida ones and set the directory name in the config file) and search results limit. This will (hopefully) be made easier in the future but at least a temporary way to change these things was needed right now.
• Doesn't crash anymore when all the search results are solved.

Minor changes:

• Removed a theme option ("of-player") that didn't make sense for this app.
• Include the side to move in the "Wrong move" message (for the cases when you click too fast by mistake and miss it).
• Don't start the selection if the click isn't on a piece from the side to move.

Windows:

• Doesn't open a command prompt window anymore.
• Added another .exe (named "offline-chess-puzzles-win7.exe") for windows versions older than Windows 10. The piece theme can't be changed and is quite ugly (it uses a font and not images) but other than that, the functionality is the same.

Linux:

• First binary release. The AppImage file is self-contained as it's supposed to be but if you want/need you can put a settings.json file (like the one in the repository) in the same directory to change things. It was tested on Arch Linux and Linux Mint 20.1.

This is the first release, there's a lot of things that could be improved but it's already fully functional (the zip also includes the lichess puzzle db, so no need to manually download it yourself).

I'm doing this Windows release first both because in Linux we're more used to compiling things ourselves and also because I still need to check how exactly I should distribute Linux binaries.