Random chess programs that integrate with lichess.org or at the very least use libraries and data from database.lichess.org.
git clone https://github.com/tailuge/chess-o-tron.git cd chess-o-tron/generate npm install cd src # filter raw FENs for those containing more than 1 knight fork: head -n 500 ../data/puzzle.fens | node filterForFeature.js "Knight forks" 1 | tee ./fens/knightforks.js # filter raw PGNs for first position containing more than 1 knight fork: head -n 500 ../data/puzzle.fens | node filterForFeature.js "Knight forks" 1 | tee ./fens/knightforks.js (node 4.2.4 and above)
cd explorer npm install gulp prod gulp cd quiz npm install gulp prod gulp