2019

• Xiangqi Xuanfeng won CCMC
• Stockfish NNUE significantly surpassed the traditional evaluation version by the end of 2019
• The Xiangqi community began attempting the NNUE technical route

2020

• The pandemic affected offline competitions; CCMC was suspended
• Online gaming platforms for Go and Xiangqi saw significant user growth
• Research on the application of NNUE technology in Xiangqi accelerated

2021

• Experimental Xiangqi engines based on Stockfish NNUE began appearing on GitHub
• Preliminary technical exploration for the Pikafish project

2022

• Pikafish was officially released on GitHub
• The NNUE evaluation network, after adaptation, performed well in Xiangqi
• Pikafish’s strength quickly caught up with and surpassed commercial engines
• The Pikafish community grew rapidly; the Fishtest platform began operation
• The Xiangqi engine ecosystem transitioned from commercial closed-source to open source community

Volume XIV: Xiangqi Engine Tournament System

ICGA Computer Olympiad

• Organizer: International Computer Games Association (ICGA)
• History: First held in 1989
• Frequency: Every 1-2 years
• Format: Swiss system or round-robin
• Rules: Asian Xiangqi Rules
• Entry conditions: Any independently developed engine can participate

Chinese Computer Game Championship (CCMC)

• Organizer: Game Game Professional Committee of the Chinese Association for Artificial Intelligence
• History: First held in 2006
• Frequency: Annually (suspended after 2020)
• Format: Swiss system or round-robin
• Rules: Chinese Xiangqi Competition Rules
• Entry conditions: Domestic academic institutions and individual developers can participate