Kingfisher Kingfisher is a UCI-compliant chess engine written in C++. Versions dev version (unreleased): >100 ELO stronger than v1.1.1 (estimated) v1.1.1: 2315±27 ELO (40/15), 2298±18 ELO (2'+1") v1.0: 2281±29 ELO (40/15), 2303±17 ELO (2'+1")