AlphaGo is a computer program that plays the board game Go.
AlphaGo Zero is a version of DeepMind's Go software AlphaGo.
AlphaZero is a computer program developed by the Alphabet-owned AI research company DeepMind, which uses an approach similar to AlphaGo Zero's to master not just Go, but also chess and shogi.
In shogi, castles (囲い kakoi) are strong defensive configurations of pieces that protect the king (玉).
Computer shogi is a field of artificial intelligence concerned with the creation of computer programs which can play shogi.
Elmo is a Muppet character on the children's television show Sesame Street.
This is a list of shogi software (engines and/or Graphical User Interfaces).