A very simple serverless, privacy aware chess tactics trainer. Released under the Apache License 2.0.

Test it live at: https://artefact2.gitlab.io/ormulogun/

• PHP (CLI)
• Any UCI engine (eg stockfish; puzzle generation only)
• GNU parallel
• pv
• zstd
• CMake
• clang/llvm
• sassc
• Judy (only for opening book generation)
• Inkscape (only for EPUB generation)

git submodule update --recursive --init

make -C frontend
make -C frontend host

See README.md.

See README.md.

• More automatic tagging (sacrifices, Zugzwang, Zwischenzug, checkmate patterns, avoid stalemate...)
• More subtags (Fork (Knight), Pin (Queen) etc. or just add tags per involved piece)
• Better automatic tagging (not a trivial task)
• Local puzzle blacklist (ignore list)
• Better activity log, activity streak
• Find some way of rating puzzles by difficulty without relying on a central server and user tracking (if at all possible)
• localStorage space limit may become an issue with large puzzlesets, maybe use lz-string
• Opening trainer
• Guess the move

• Lichess, for making their game dumps available
• Colin M.L. Burnett for releasing his chess pieces as SVG (full license in COPYING.pieces)
• Pablo Impallari for releasing the Kaushan Script under the SIL Open Font License
• GitHub Octicons for the "fork" icon, released under the SIL Open Font License, version 1.1
• stockfish.js and all the contributors of Stockfish